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rocksdb/db/db_test.cc
Andres Noetzli 014fd55adc Support for SingleDelete() 
Summary:
This patch fixes #7460559. It introduces SingleDelete as a new database
operation. This operation can be used to delete keys that were never
overwritten (no put following another put of the same key). If an overwritten
key is single deleted the behavior is undefined. Single deletion of a
non-existent key has no effect but multiple consecutive single deletions are
not allowed (see limitations).

In contrast to the conventional Delete() operation, the deletion entry is
removed along with the value when the two are lined up in a compaction. Note:
The semantics are similar to @igor's prototype that allowed to have this
behavior on the granularity of a column family (
https://reviews.facebook.net/D42093 ). This new patch, however, is more
aggressive when it comes to removing tombstones: It removes the SingleDelete
together with the value whenever there is no snapshot between them while the
older patch only did this when the sequence number of the deletion was older
than the earliest snapshot.

Most of the complex additions are in the Compaction Iterator, all other changes
should be relatively straightforward. The patch also includes basic support for
single deletions in db_stress and db_bench.

Limitations:
- Not compatible with cuckoo hash tables
- Single deletions cannot be used in combination with merges and normal
  deletions on the same key (other keys are not affected by this)
- Consecutive single deletions are currently not allowed (and older version of
  this patch supported this so it could be resurrected if needed)

Test Plan: make all check

Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor

Reviewed By: igor

Subscribers: maykov, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43179
2015-09-17 11:42:56 -07:00

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// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
// Introduction of SyncPoint effectively disabled building and running this test
// in Release build.
// which is a pity, it is a good test
#if !(defined NDEBUG) || !defined(OS_WIN)
#include <algorithm>
#include <iostream>
#include <set>
#include <thread>
#include <unordered_set>
#include <utility>
#include <fcntl.h>
#ifndef OS_WIN
#include <unistd.h>
#endif
#include "db/filename.h"
#include "db/dbformat.h"
#include "db/db_impl.h"
#include "db/filename.h"
#include "db/job_context.h"
#include "db/version_set.h"
#include "db/write_batch_internal.h"
#include "port/stack_trace.h"
#include "rocksdb/cache.h"
#include "rocksdb/compaction_filter.h"
#include "rocksdb/convenience.h"
#include "rocksdb/db.h"
#include "rocksdb/delete_scheduler.h"
#include "rocksdb/env.h"
#include "rocksdb/experimental.h"
#include "rocksdb/filter_policy.h"
#include "rocksdb/options.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/slice.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/snapshot.h"
#include "rocksdb/table.h"
#include "rocksdb/table_properties.h"
#include "rocksdb/thread_status.h"
#include "rocksdb/utilities/write_batch_with_index.h"
#include "rocksdb/utilities/checkpoint.h"
#include "rocksdb/utilities/optimistic_transaction_db.h"
#include "table/block_based_table_factory.h"
#include "table/mock_table.h"
#include "table/plain_table_factory.h"
#include "util/db_test_util.h"
#include "util/file_reader_writer.h"
#include "util/hash.h"
#include "util/hash_linklist_rep.h"
#include "utilities/merge_operators.h"
#include "util/logging.h"
#include "util/compression.h"
#include "util/mutexlock.h"
#include "util/rate_limiter.h"
#include "util/statistics.h"
#include "util/testharness.h"
#include "util/scoped_arena_iterator.h"
#include "util/sync_point.h"
#include "util/testutil.h"
#include "util/mock_env.h"
#include "util/string_util.h"
#include "util/thread_status_util.h"
#include "util/xfunc.h"
namespace rocksdb {
static long TestGetTickerCount(const Options& options, Tickers ticker_type) {
return options.statistics->getTickerCount(ticker_type);
}
// A helper function that ensures the table properties returned in
// `GetPropertiesOfAllTablesTest` is correct.
// This test assumes entries size is different for each of the tables.
namespace {
void VerifyTableProperties(DB* db, uint64_t expected_entries_size) {
TablePropertiesCollection props;
ASSERT_OK(db->GetPropertiesOfAllTables(&props));
ASSERT_EQ(4U, props.size());
std::unordered_set<uint64_t> unique_entries;
// Indirect test
uint64_t sum = 0;
for (const auto& item : props) {
unique_entries.insert(item.second->num_entries);
sum += item.second->num_entries;
}
ASSERT_EQ(props.size(), unique_entries.size());
ASSERT_EQ(expected_entries_size, sum);
}
uint64_t GetNumberOfSstFilesForColumnFamily(DB* db,
std::string column_family_name) {
std::vector<LiveFileMetaData> metadata;
db->GetLiveFilesMetaData(&metadata);
uint64_t result = 0;
for (auto& fileMetadata : metadata) {
result += (fileMetadata.column_family_name == column_family_name);
}
return result;
}
} // namespace
class DBTest : public DBTestBase {
public:
DBTest() : DBTestBase("/db_test") {}
};
class DBTestWithParam : public DBTest,
public testing::WithParamInterface<uint32_t> {
public:
DBTestWithParam() { max_subcompactions_ = GetParam(); }
// Required if inheriting from testing::WithParamInterface<>
static void SetUpTestCase() {}
static void TearDownTestCase() {}
uint32_t max_subcompactions_;
};
TEST_F(DBTest, Empty) {
do {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
std::string num;
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("0", num);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("1", num);
// Block sync calls
env_->delay_sstable_sync_.store(true, std::memory_order_release);
Put(1, "k1", std::string(100000, 'x')); // Fill memtable
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("2", num);
Put(1, "k2", std::string(100000, 'y')); // Trigger compaction
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ("1", num);
ASSERT_EQ("v1", Get(1, "foo"));
// Release sync calls
env_->delay_sstable_sync_.store(false, std::memory_order_release);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("1", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("2", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("3", num);
ASSERT_OK(db_->EnableFileDeletions(false));
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("2", num);
ASSERT_OK(db_->EnableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("0", num);
} while (ChangeOptions());
}
TEST_F(DBTest, WriteEmptyBatch) {
Options options;
options.env = env_;
options.write_buffer_size = 100000;
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
env_->sync_counter_.store(0);
WriteOptions wo;
wo.sync = true;
wo.disableWAL = false;
WriteBatch empty_batch;
ASSERT_OK(dbfull()->Write(wo, &empty_batch));
ASSERT_GE(env_->sync_counter_.load(), 1);
// make sure we can re-open it.
ASSERT_OK(TryReopenWithColumnFamilies({"default", "pikachu"}, options));
ASSERT_EQ("bar", Get(1, "foo"));
}
TEST_F(DBTest, ReadOnlyDB) {
ASSERT_OK(Put("foo", "v1"));
ASSERT_OK(Put("bar", "v2"));
ASSERT_OK(Put("foo", "v3"));
Close();
auto options = CurrentOptions();
assert(options.env = env_);
ASSERT_OK(ReadOnlyReopen(options));
ASSERT_EQ("v3", Get("foo"));
ASSERT_EQ("v2", Get("bar"));
Iterator* iter = db_->NewIterator(ReadOptions());
int count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
++count;
}
ASSERT_EQ(count, 2);
delete iter;
Close();
// Reopen and flush memtable.
Reopen(options);
Flush();
Close();
// Now check keys in read only mode.
ASSERT_OK(ReadOnlyReopen(options));
ASSERT_EQ("v3", Get("foo"));
ASSERT_EQ("v2", Get("bar"));
}
TEST_F(DBTest, CompactedDB) {
const uint64_t kFileSize = 1 << 20;
Options options;
options.disable_auto_compactions = true;
options.write_buffer_size = kFileSize;
options.target_file_size_base = kFileSize;
options.max_bytes_for_level_base = 1 << 30;
options.compression = kNoCompression;
options = CurrentOptions(options);
Reopen(options);
// 1 L0 file, use CompactedDB if max_open_files = -1
ASSERT_OK(Put("aaa", DummyString(kFileSize / 2, '1')));
Flush();
Close();
ASSERT_OK(ReadOnlyReopen(options));
Status s = Put("new", "value");
ASSERT_EQ(s.ToString(),
"Not implemented: Not supported operation in read only mode.");
ASSERT_EQ(DummyString(kFileSize / 2, '1'), Get("aaa"));
Close();
options.max_open_files = -1;
ASSERT_OK(ReadOnlyReopen(options));
s = Put("new", "value");
ASSERT_EQ(s.ToString(),
"Not implemented: Not supported in compacted db mode.");
ASSERT_EQ(DummyString(kFileSize / 2, '1'), Get("aaa"));
Close();
Reopen(options);
// Add more L0 files
ASSERT_OK(Put("bbb", DummyString(kFileSize / 2, '2')));
Flush();
ASSERT_OK(Put("aaa", DummyString(kFileSize / 2, 'a')));
Flush();
ASSERT_OK(Put("bbb", DummyString(kFileSize / 2, 'b')));
ASSERT_OK(Put("eee", DummyString(kFileSize / 2, 'e')));
Flush();
Close();
ASSERT_OK(ReadOnlyReopen(options));
// Fallback to read-only DB
s = Put("new", "value");
ASSERT_EQ(s.ToString(),
"Not implemented: Not supported operation in read only mode.");
Close();
// Full compaction
Reopen(options);
// Add more keys
ASSERT_OK(Put("fff", DummyString(kFileSize / 2, 'f')));
ASSERT_OK(Put("hhh", DummyString(kFileSize / 2, 'h')));
ASSERT_OK(Put("iii", DummyString(kFileSize / 2, 'i')));
ASSERT_OK(Put("jjj", DummyString(kFileSize / 2, 'j')));
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(3, NumTableFilesAtLevel(1));
Close();
// CompactedDB
ASSERT_OK(ReadOnlyReopen(options));
s = Put("new", "value");
ASSERT_EQ(s.ToString(),
"Not implemented: Not supported in compacted db mode.");
ASSERT_EQ("NOT_FOUND", Get("abc"));
ASSERT_EQ(DummyString(kFileSize / 2, 'a'), Get("aaa"));
ASSERT_EQ(DummyString(kFileSize / 2, 'b'), Get("bbb"));
ASSERT_EQ("NOT_FOUND", Get("ccc"));
ASSERT_EQ(DummyString(kFileSize / 2, 'e'), Get("eee"));
ASSERT_EQ(DummyString(kFileSize / 2, 'f'), Get("fff"));
ASSERT_EQ("NOT_FOUND", Get("ggg"));
ASSERT_EQ(DummyString(kFileSize / 2, 'h'), Get("hhh"));
ASSERT_EQ(DummyString(kFileSize / 2, 'i'), Get("iii"));
ASSERT_EQ(DummyString(kFileSize / 2, 'j'), Get("jjj"));
ASSERT_EQ("NOT_FOUND", Get("kkk"));
// MultiGet
std::vector<std::string> values;
std::vector<Status> status_list = dbfull()->MultiGet(ReadOptions(),
std::vector<Slice>({Slice("aaa"), Slice("ccc"), Slice("eee"),
Slice("ggg"), Slice("iii"), Slice("kkk")}),
&values);
ASSERT_EQ(status_list.size(), static_cast<uint64_t>(6));
ASSERT_EQ(values.size(), static_cast<uint64_t>(6));
ASSERT_OK(status_list[0]);
ASSERT_EQ(DummyString(kFileSize / 2, 'a'), values[0]);
ASSERT_TRUE(status_list[1].IsNotFound());
ASSERT_OK(status_list[2]);
ASSERT_EQ(DummyString(kFileSize / 2, 'e'), values[2]);
ASSERT_TRUE(status_list[3].IsNotFound());
ASSERT_OK(status_list[4]);
ASSERT_EQ(DummyString(kFileSize / 2, 'i'), values[4]);
ASSERT_TRUE(status_list[5].IsNotFound());
}
// Make sure that when options.block_cache is set, after a new table is
// created its index/filter blocks are added to block cache.
TEST_F(DBTest, IndexAndFilterBlocksOfNewTableAddedToCache) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions table_options;
table_options.cache_index_and_filter_blocks = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "key", "val"));
// Create a new table.
ASSERT_OK(Flush(1));
// index/filter blocks added to block cache right after table creation.
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
ASSERT_EQ(2, /* only index/filter were added */
TestGetTickerCount(options, BLOCK_CACHE_ADD));
ASSERT_EQ(0, TestGetTickerCount(options, BLOCK_CACHE_DATA_MISS));
uint64_t int_num;
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
// Make sure filter block is in cache.
std::string value;
ReadOptions ropt;
db_->KeyMayExist(ReadOptions(), handles_[1], "key", &value);
// Miss count should remain the same.
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
db_->KeyMayExist(ReadOptions(), handles_[1], "key", &value);
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
ASSERT_EQ(2, TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
// Make sure index block is in cache.
auto index_block_hit = TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT);
value = Get(1, "key");
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
ASSERT_EQ(index_block_hit + 1,
TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
value = Get(1, "key");
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
ASSERT_EQ(index_block_hit + 2,
TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
}
TEST_F(DBTest, ParanoidFileChecks) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
options.level0_file_num_compaction_trigger = 2;
options.paranoid_file_checks = true;
BlockBasedTableOptions table_options;
table_options.cache_index_and_filter_blocks = false;
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "1_key", "val"));
ASSERT_OK(Put(1, "9_key", "val"));
// Create a new table.
ASSERT_OK(Flush(1));
ASSERT_EQ(1, /* read and cache data block */
TestGetTickerCount(options, BLOCK_CACHE_ADD));
ASSERT_OK(Put(1, "1_key2", "val2"));
ASSERT_OK(Put(1, "9_key2", "val2"));
// Create a new SST file. This will further trigger a compaction
// and generate another file.
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(3, /* Totally 3 files created up to now */
TestGetTickerCount(options, BLOCK_CACHE_ADD));
// After disabling options.paranoid_file_checks. NO further block
// is added after generating a new file.
ASSERT_OK(
dbfull()->SetOptions(handles_[1], {{"paranoid_file_checks", "false"}}));
ASSERT_OK(Put(1, "1_key3", "val3"));
ASSERT_OK(Put(1, "9_key3", "val3"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "1_key4", "val4"));
ASSERT_OK(Put(1, "9_key4", "val4"));
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(3, /* Totally 3 files created up to now */
TestGetTickerCount(options, BLOCK_CACHE_ADD));
}
TEST_F(DBTest, GetPropertiesOfAllTablesTest) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
Reopen(options);
// Create 4 tables
for (int table = 0; table < 4; ++table) {
for (int i = 0; i < 10 + table; ++i) {
db_->Put(WriteOptions(), ToString(table * 100 + i), "val");
}
db_->Flush(FlushOptions());
}
// 1. Read table properties directly from file
Reopen(options);
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
// 2. Put two tables to table cache and
Reopen(options);
// fetch key from 1st and 2nd table, which will internally place that table to
// the table cache.
for (int i = 0; i < 2; ++i) {
Get(ToString(i * 100 + 0));
}
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
// 3. Put all tables to table cache
Reopen(options);
// fetch key from 1st and 2nd table, which will internally place that table to
// the table cache.
for (int i = 0; i < 4; ++i) {
Get(ToString(i * 100 + 0));
}
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
}
namespace {
void ResetTableProperties(TableProperties* tp) {
tp->data_size = 0;
tp->index_size = 0;
tp->filter_size = 0;
tp->raw_key_size = 0;
tp->raw_value_size = 0;
tp->num_data_blocks = 0;
tp->num_entries = 0;
}
void ParseTablePropertiesString(std::string tp_string, TableProperties* tp) {
double dummy_double;
std::replace(tp_string.begin(), tp_string.end(), ';', ' ');
std::replace(tp_string.begin(), tp_string.end(), '=', ' ');
ResetTableProperties(tp);
sscanf(tp_string.c_str(), "# data blocks %" SCNu64
" # entries %" SCNu64
" raw key size %" SCNu64
" raw average key size %lf "
" raw value size %" SCNu64
" raw average value size %lf "
" data block size %" SCNu64
" index block size %" SCNu64
" filter block size %" SCNu64,
&tp->num_data_blocks, &tp->num_entries, &tp->raw_key_size,
&dummy_double, &tp->raw_value_size, &dummy_double, &tp->data_size,
&tp->index_size, &tp->filter_size);
}
void VerifySimilar(uint64_t a, uint64_t b, double bias) {
ASSERT_EQ(a == 0U, b == 0U);
if (a == 0) {
return;
}
double dbl_a = static_cast<double>(a);
double dbl_b = static_cast<double>(b);
if (dbl_a > dbl_b) {
ASSERT_LT(static_cast<double>(dbl_a - dbl_b) / (dbl_a + dbl_b), bias);
} else {
ASSERT_LT(static_cast<double>(dbl_b - dbl_a) / (dbl_a + dbl_b), bias);
}
}
void VerifyTableProperties(const TableProperties& base_tp,
const TableProperties& new_tp,
double filter_size_bias = 0.1,
double index_size_bias = 0.1,
double data_size_bias = 0.1,
double num_data_blocks_bias = 0.05) {
VerifySimilar(base_tp.data_size, new_tp.data_size, data_size_bias);
VerifySimilar(base_tp.index_size, new_tp.index_size, index_size_bias);
VerifySimilar(base_tp.filter_size, new_tp.filter_size, filter_size_bias);
VerifySimilar(base_tp.num_data_blocks, new_tp.num_data_blocks,
num_data_blocks_bias);
ASSERT_EQ(base_tp.raw_key_size, new_tp.raw_key_size);
ASSERT_EQ(base_tp.raw_value_size, new_tp.raw_value_size);
ASSERT_EQ(base_tp.num_entries, new_tp.num_entries);
}
void GetExpectedTableProperties(TableProperties* expected_tp,
const int kKeySize, const int kValueSize,
const int kKeysPerTable, const int kTableCount,
const int kBloomBitsPerKey,
const size_t kBlockSize) {
const int kKeyCount = kTableCount * kKeysPerTable;
const int kAvgSuccessorSize = kKeySize / 2;
const int kEncodingSavePerKey = kKeySize / 4;
expected_tp->raw_key_size = kKeyCount * (kKeySize + 8);
expected_tp->raw_value_size = kKeyCount * kValueSize;
expected_tp->num_entries = kKeyCount;
expected_tp->num_data_blocks =
kTableCount *
(kKeysPerTable * (kKeySize - kEncodingSavePerKey + kValueSize)) /
kBlockSize;
expected_tp->data_size =
kTableCount * (kKeysPerTable * (kKeySize + 8 + kValueSize));
expected_tp->index_size =
expected_tp->num_data_blocks * (kAvgSuccessorSize + 12);
expected_tp->filter_size =
kTableCount * (kKeysPerTable * kBloomBitsPerKey / 8);
}
} // namespace
TEST_F(DBTest, AggregatedTableProperties) {
for (int kTableCount = 40; kTableCount <= 100; kTableCount += 30) {
const int kKeysPerTable = 100;
const int kKeySize = 80;
const int kValueSize = 200;
const int kBloomBitsPerKey = 20;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
Random rnd(5632);
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
db_->Flush(FlushOptions());
}
std::string property;
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &property);
TableProperties expected_tp;
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, kTableCount, kBloomBitsPerKey,
table_options.block_size);
TableProperties output_tp;
ParseTablePropertiesString(property, &output_tp);
VerifyTableProperties(expected_tp, output_tp);
}
}
TEST_F(DBTest, ReadLatencyHistogramByLevel) {
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10;
options.level0_file_num_compaction_trigger = 3;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 450 << 10;
options.target_file_size_base = 98 << 10;
options.max_write_buffer_number = 2;
options.statistics = rocksdb::CreateDBStatistics();
options.max_open_files = 100;
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
DestroyAndReopen(options);
int key_index = 0;
Random rnd(301);
for (int num = 0; num < 5; num++) {
Put("foo", "bar");
GenerateNewFile(&rnd, &key_index);
}
std::string prop;
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
// Get() after flushes, See latency histogram tracked.
for (int key = 0; key < 500; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue Get(). See thee latency tracked
Reopen(options);
for (int key = 0; key < 500; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue iterating. See thee latency tracked
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_EQ(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
{
unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->Seek(Key(0)); iter->Valid(); iter->Next()) {
}
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// options.max_open_files preloads table readers.
options.max_open_files = -1;
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
for (int key = 0; key < 500; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
}
TEST_F(DBTest, AggregatedTablePropertiesAtLevel) {
const int kTableCount = 100;
const int kKeysPerTable = 10;
const int kKeySize = 50;
const int kValueSize = 400;
const int kMaxLevel = 7;
const int kBloomBitsPerKey = 20;
Random rnd(301);
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
options.level0_file_num_compaction_trigger = 2;
options.target_file_size_base = 8192;
options.max_bytes_for_level_base = 10000;
options.max_bytes_for_level_multiplier = 2;
// This ensures there no compaction happening when we call GetProperty().
options.disable_auto_compactions = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
std::string level_tp_strings[kMaxLevel];
std::string tp_string;
TableProperties level_tps[kMaxLevel];
TableProperties tp, sum_tp, expected_tp;
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
db_->Flush(FlushOptions());
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ResetTableProperties(&sum_tp);
for (int level = 0; level < kMaxLevel; ++level) {
db_->GetProperty(
DB::Properties::kAggregatedTablePropertiesAtLevel + ToString(level),
&level_tp_strings[level]);
ParseTablePropertiesString(level_tp_strings[level], &level_tps[level]);
sum_tp.data_size += level_tps[level].data_size;
sum_tp.index_size += level_tps[level].index_size;
sum_tp.filter_size += level_tps[level].filter_size;
sum_tp.raw_key_size += level_tps[level].raw_key_size;
sum_tp.raw_value_size += level_tps[level].raw_value_size;
sum_tp.num_data_blocks += level_tps[level].num_data_blocks;
sum_tp.num_entries += level_tps[level].num_entries;
}
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &tp_string);
ParseTablePropertiesString(tp_string, &tp);
ASSERT_EQ(sum_tp.data_size, tp.data_size);
ASSERT_EQ(sum_tp.index_size, tp.index_size);
ASSERT_EQ(sum_tp.filter_size, tp.filter_size);
ASSERT_EQ(sum_tp.raw_key_size, tp.raw_key_size);
ASSERT_EQ(sum_tp.raw_value_size, tp.raw_value_size);
ASSERT_EQ(sum_tp.num_data_blocks, tp.num_data_blocks);
ASSERT_EQ(sum_tp.num_entries, tp.num_entries);
if (table > 3) {
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, table, kBloomBitsPerKey,
table_options.block_size);
// Gives larger bias here as index block size, filter block size,
// and data block size become much harder to estimate in this test.
VerifyTableProperties(tp, expected_tp, 0.5, 0.4, 0.4, 0.25);
}
}
}
class CoutingUserTblPropCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return "CoutingUserTblPropCollector"; }
Status Finish(UserCollectedProperties* properties) override {
std::string encoded;
PutVarint32(&encoded, count_);
*properties = UserCollectedProperties{
{"CoutingUserTblPropCollector", message_}, {"Count", encoded},
};
return Status::OK();
}
Status AddUserKey(const Slice& user_key, const Slice& value, EntryType type,
SequenceNumber seq, uint64_t file_size) override {
++count_;
return Status::OK();
}
virtual UserCollectedProperties GetReadableProperties() const override {
return UserCollectedProperties{};
}
private:
std::string message_ = "Rocksdb";
uint32_t count_ = 0;
};
class CoutingUserTblPropCollectorFactory
: public TablePropertiesCollectorFactory {
public:
virtual TablePropertiesCollector* CreateTablePropertiesCollector() override {
return new CoutingUserTblPropCollector();
}
const char* Name() const override {
return "CoutingUserTblPropCollectorFactory";
}
};
TEST_F(DBTest, GetUserDefinedTablaProperties) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = (1<<30);
options.max_background_flushes = 0;
options.table_properties_collector_factories.resize(1);
options.table_properties_collector_factories[0] =
std::make_shared<CoutingUserTblPropCollectorFactory>();
Reopen(options);
// Create 4 tables
for (int table = 0; table < 4; ++table) {
for (int i = 0; i < 10 + table; ++i) {
db_->Put(WriteOptions(), ToString(table * 100 + i), "val");
}
db_->Flush(FlushOptions());
}
TablePropertiesCollection props;
ASSERT_OK(db_->GetPropertiesOfAllTables(&props));
ASSERT_EQ(4U, props.size());
uint32_t sum = 0;
for (const auto& item : props) {
auto& user_collected = item.second->user_collected_properties;
ASSERT_TRUE(user_collected.find("CoutingUserTblPropCollector") !=
user_collected.end());
ASSERT_EQ(user_collected.at("CoutingUserTblPropCollector"), "Rocksdb");
ASSERT_TRUE(user_collected.find("Count") != user_collected.end());
Slice key(user_collected.at("Count"));
uint32_t count;
ASSERT_TRUE(GetVarint32(&key, &count));
sum += count;
}
ASSERT_EQ(10u + 11u + 12u + 13u, sum);
}
TEST_F(DBTest, LevelLimitReopen) {
Options options = CurrentOptions();
CreateAndReopenWithCF({"pikachu"}, options);
const std::string value(1024 * 1024, ' ');
int i = 0;
while (NumTableFilesAtLevel(2, 1) == 0) {
ASSERT_OK(Put(1, Key(i++), value));
}
options.num_levels = 1;
options.max_bytes_for_level_multiplier_additional.resize(1, 1);
Status s = TryReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ(s.IsInvalidArgument(), true);
ASSERT_EQ(s.ToString(),
"Invalid argument: db has more levels than options.num_levels");
options.num_levels = 10;
options.max_bytes_for_level_multiplier_additional.resize(10, 1);
ASSERT_OK(TryReopenWithColumnFamilies({"default", "pikachu"}, options));
}
TEST_F(DBTest, PutDeleteGet) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_OK(Put(1, "foo", "v2"));
ASSERT_EQ("v2", Get(1, "foo"));
ASSERT_OK(Delete(1, "foo"));
ASSERT_EQ("NOT_FOUND", Get(1, "foo"));
} while (ChangeOptions());
}
TEST_F(DBTest, PutSingleDeleteGet) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_OK(Put(1, "foo2", "v2"));
ASSERT_EQ("v2", Get(1, "foo2"));
ASSERT_OK(SingleDelete(1, "foo"));
ASSERT_EQ("NOT_FOUND", Get(1, "foo"));
// Skip HashCuckooRep as it does not support single delete. FIFO and
// universal compaction do not apply to the test case. Skip MergePut
// because single delete does not get removed when it encounters a merge.
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction |
kSkipUniversalCompaction | kSkipMergePut));
}
TEST_F(DBTest, SingleDeleteFlush) {
// Test to check whether flushing preserves a single delete hidden
// behind a put.
do {
Random rnd(301);
Options options = CurrentOptions();
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
// Put values on second level (so that they will not be in the same
// compaction as the other operations.
Put(1, "foo", "first");
Put(1, "bar", "one");
ASSERT_OK(Flush(1));
MoveFilesToLevel(2, 1);
// (Single) delete hidden by a put
SingleDelete(1, "foo");
Put(1, "foo", "second");
Delete(1, "bar");
Put(1, "bar", "two");
ASSERT_OK(Flush(1));
SingleDelete(1, "foo");
Delete(1, "bar");
ASSERT_OK(Flush(1));
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ("NOT_FOUND", Get(1, "bar"));
ASSERT_EQ("NOT_FOUND", Get(1, "foo"));
// Skip HashCuckooRep as it does not support single delete. FIFO and
// universal compaction do not apply to the test case. Skip MergePut
// because merges cannot be combined with single deletions.
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction |
kSkipUniversalCompaction | kSkipMergePut));
}
TEST_F(DBTest, SingleDeletePutFlush) {
// Single deletes that encounter the matching put in a flush should get
// removed.
do {
Random rnd(301);
Options options = CurrentOptions();
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "foo", Slice());
Put(1, "a", Slice());
SingleDelete(1, "a");
ASSERT_OK(Flush(1));
ASSERT_EQ("[ ]", AllEntriesFor("a", 1));
// Skip HashCuckooRep as it does not support single delete. FIFO and
// universal compaction do not apply to the test case. Skip MergePut
// because merges cannot be combined with single deletions.
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction |
kSkipUniversalCompaction | kSkipMergePut));
}
TEST_F(DBTest, EmptyFlush) {
// It is possible to produce empty flushes when using single deletes. Tests
// whether empty flushes cause issues.
do {
Random rnd(301);
Options options = CurrentOptions();
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "a", Slice());
SingleDelete(1, "a");
ASSERT_OK(Flush(1));
ASSERT_EQ("[ ]", AllEntriesFor("a", 1));
// Skip HashCuckooRep as it does not support single delete. FIFO and
// universal compaction do not apply to the test case. Skip MergePut
// because merges cannot be combined with single deletions.
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction |
kSkipUniversalCompaction | kSkipMergePut));
}
TEST_F(DBTest, GetFromImmutableLayer) {
do {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
// Block sync calls
env_->delay_sstable_sync_.store(true, std::memory_order_release);
Put(1, "k1", std::string(100000, 'x')); // Fill memtable
Put(1, "k2", std::string(100000, 'y')); // Trigger flush
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("NOT_FOUND", Get(0, "foo"));
// Release sync calls
env_->delay_sstable_sync_.store(false, std::memory_order_release);
} while (ChangeOptions());
}
TEST_F(DBTest, GetFromVersions) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Flush(1));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("NOT_FOUND", Get(0, "foo"));
} while (ChangeOptions());
}
TEST_F(DBTest, GetSnapshot) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions(options_override));
// Try with both a short key and a long key
for (int i = 0; i < 2; i++) {
std::string key = (i == 0) ? std::string("foo") : std::string(200, 'x');
ASSERT_OK(Put(1, key, "v1"));
const Snapshot* s1 = db_->GetSnapshot();
if (option_config_ == kHashCuckoo) {
// Unsupported case.
ASSERT_TRUE(s1 == nullptr);
break;
}
ASSERT_OK(Put(1, key, "v2"));
ASSERT_EQ("v2", Get(1, key));
ASSERT_EQ("v1", Get(1, key, s1));
ASSERT_OK(Flush(1));
ASSERT_EQ("v2", Get(1, key));
ASSERT_EQ("v1", Get(1, key, s1));
db_->ReleaseSnapshot(s1);
}
} while (ChangeOptions());
}
TEST_F(DBTest, GetLevel0Ordering) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
// Check that we process level-0 files in correct order. The code
// below generates two level-0 files where the earlier one comes
// before the later one in the level-0 file list since the earlier
// one has a smaller "smallest" key.
ASSERT_OK(Put(1, "bar", "b"));
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "v2"));
ASSERT_OK(Flush(1));
ASSERT_EQ("v2", Get(1, "foo"));
} while (ChangeOptions());
}
TEST_F(DBTest, WrongLevel0Config) {
Options options = CurrentOptions();
Close();
ASSERT_OK(DestroyDB(dbname_, options));
options.level0_stop_writes_trigger = 1;
options.level0_slowdown_writes_trigger = 2;
options.level0_file_num_compaction_trigger = 3;
ASSERT_OK(DB::Open(options, dbname_, &db_));
}
TEST_F(DBTest, GetOrderedByLevels) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
Compact(1, "a", "z");
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_OK(Put(1, "foo", "v2"));
ASSERT_EQ("v2", Get(1, "foo"));
ASSERT_OK(Flush(1));
ASSERT_EQ("v2", Get(1, "foo"));
} while (ChangeOptions());
}
TEST_F(DBTest, GetPicksCorrectFile) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
// Arrange to have multiple files in a non-level-0 level.
ASSERT_OK(Put(1, "a", "va"));
Compact(1, "a", "b");
ASSERT_OK(Put(1, "x", "vx"));
Compact(1, "x", "y");
ASSERT_OK(Put(1, "f", "vf"));
Compact(1, "f", "g");
ASSERT_EQ("va", Get(1, "a"));
ASSERT_EQ("vf", Get(1, "f"));
ASSERT_EQ("vx", Get(1, "x"));
} while (ChangeOptions());
}
TEST_F(DBTest, GetEncountersEmptyLevel) {
do {
Options options = CurrentOptions();
options.disableDataSync = true;
CreateAndReopenWithCF({"pikachu"}, options);
// Arrange for the following to happen:
// * sstable A in level 0
// * nothing in level 1
// * sstable B in level 2
// Then do enough Get() calls to arrange for an automatic compaction
// of sstable A. A bug would cause the compaction to be marked as
// occurring at level 1 (instead of the correct level 0).
// Step 1: First place sstables in levels 0 and 2
Put(1, "a", "begin");
Put(1, "z", "end");
ASSERT_OK(Flush(1));
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1]);
dbfull()->TEST_CompactRange(1, nullptr, nullptr, handles_[1]);
Put(1, "a", "begin");
Put(1, "z", "end");
ASSERT_OK(Flush(1));
ASSERT_GT(NumTableFilesAtLevel(0, 1), 0);
ASSERT_GT(NumTableFilesAtLevel(2, 1), 0);
// Step 2: clear level 1 if necessary.
dbfull()->TEST_CompactRange(1, nullptr, nullptr, handles_[1]);
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 1);
ASSERT_EQ(NumTableFilesAtLevel(1, 1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2, 1), 1);
// Step 3: read a bunch of times
for (int i = 0; i < 1000; i++) {
ASSERT_EQ("NOT_FOUND", Get(1, "missing"));
}
// Step 4: Wait for compaction to finish
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 1); // XXX
} while (ChangeOptions(kSkipUniversalCompaction | kSkipFIFOCompaction));
}
// KeyMayExist can lead to a few false positives, but not false negatives.
// To make test deterministic, use a much larger number of bits per key-20 than
// bits in the key, so that false positives are eliminated
TEST_F(DBTest, KeyMayExist) {
do {
ReadOptions ropts;
std::string value;
anon::OptionsOverride options_override;
options_override.filter_policy.reset(NewBloomFilterPolicy(20));
Options options = CurrentOptions(options_override);
options.statistics = rocksdb::CreateDBStatistics();
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_TRUE(!db_->KeyMayExist(ropts, handles_[1], "a", &value));
ASSERT_OK(Put(1, "a", "b"));
bool value_found = false;
ASSERT_TRUE(
db_->KeyMayExist(ropts, handles_[1], "a", &value, &value_found));
ASSERT_TRUE(value_found);
ASSERT_EQ("b", value);
ASSERT_OK(Flush(1));
value.clear();
long numopen = TestGetTickerCount(options, NO_FILE_OPENS);
long cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
ASSERT_TRUE(
db_->KeyMayExist(ropts, handles_[1], "a", &value, &value_found));
ASSERT_TRUE(!value_found);
// assert that no new files were opened and no new blocks were
// read into block cache.
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
ASSERT_OK(Delete(1, "a"));
numopen = TestGetTickerCount(options, NO_FILE_OPENS);
cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
ASSERT_TRUE(!db_->KeyMayExist(ropts, handles_[1], "a", &value));
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
ASSERT_OK(Flush(1));
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1],
true /* disallow trivial move */);
numopen = TestGetTickerCount(options, NO_FILE_OPENS);
cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
ASSERT_TRUE(!db_->KeyMayExist(ropts, handles_[1], "a", &value));
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
ASSERT_OK(Delete(1, "c"));
numopen = TestGetTickerCount(options, NO_FILE_OPENS);
cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
ASSERT_TRUE(!db_->KeyMayExist(ropts, handles_[1], "c", &value));
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
// KeyMayExist function only checks data in block caches, which is not used
// by plain table format.
} while (
ChangeOptions(kSkipPlainTable | kSkipHashIndex | kSkipFIFOCompaction));
}
TEST_F(DBTest, NonBlockingIteration) {
do {
ReadOptions non_blocking_opts, regular_opts;
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
non_blocking_opts.read_tier = kBlockCacheTier;
CreateAndReopenWithCF({"pikachu"}, options);
// write one kv to the database.
ASSERT_OK(Put(1, "a", "b"));
// scan using non-blocking iterator. We should find it because
// it is in memtable.
Iterator* iter = db_->NewIterator(non_blocking_opts, handles_[1]);
int count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
count++;
}
ASSERT_EQ(count, 1);
delete iter;
// flush memtable to storage. Now, the key should not be in the
// memtable neither in the block cache.
ASSERT_OK(Flush(1));
// verify that a non-blocking iterator does not find any
// kvs. Neither does it do any IOs to storage.
long numopen = TestGetTickerCount(options, NO_FILE_OPENS);
long cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
iter = db_->NewIterator(non_blocking_opts, handles_[1]);
count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
count++;
}
ASSERT_EQ(count, 0);
ASSERT_TRUE(iter->status().IsIncomplete());
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
delete iter;
// read in the specified block via a regular get
ASSERT_EQ(Get(1, "a"), "b");
// verify that we can find it via a non-blocking scan
numopen = TestGetTickerCount(options, NO_FILE_OPENS);
cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
iter = db_->NewIterator(non_blocking_opts, handles_[1]);
count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
count++;
}
ASSERT_EQ(count, 1);
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
delete iter;
// This test verifies block cache behaviors, which is not used by plain
// table format.
// Exclude kHashCuckoo as it does not support iteration currently
} while (ChangeOptions(kSkipPlainTable | kSkipNoSeekToLast | kSkipHashCuckoo |
kSkipMmapReads));
}
TEST_F(DBTest, ManagedNonBlockingIteration) {
do {
ReadOptions non_blocking_opts, regular_opts;
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
non_blocking_opts.read_tier = kBlockCacheTier;
non_blocking_opts.managed = true;
CreateAndReopenWithCF({"pikachu"}, options);
// write one kv to the database.
ASSERT_OK(Put(1, "a", "b"));
// scan using non-blocking iterator. We should find it because
// it is in memtable.
Iterator* iter = db_->NewIterator(non_blocking_opts, handles_[1]);
int count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
count++;
}
ASSERT_EQ(count, 1);
delete iter;
// flush memtable to storage. Now, the key should not be in the
// memtable neither in the block cache.
ASSERT_OK(Flush(1));
// verify that a non-blocking iterator does not find any
// kvs. Neither does it do any IOs to storage.
int64_t numopen = TestGetTickerCount(options, NO_FILE_OPENS);
int64_t cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
iter = db_->NewIterator(non_blocking_opts, handles_[1]);
count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
count++;
}
ASSERT_EQ(count, 0);
ASSERT_TRUE(iter->status().IsIncomplete());
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
delete iter;
// read in the specified block via a regular get
ASSERT_EQ(Get(1, "a"), "b");
// verify that we can find it via a non-blocking scan
numopen = TestGetTickerCount(options, NO_FILE_OPENS);
cache_added = TestGetTickerCount(options, BLOCK_CACHE_ADD);
iter = db_->NewIterator(non_blocking_opts, handles_[1]);
count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
count++;
}
ASSERT_EQ(count, 1);
ASSERT_EQ(numopen, TestGetTickerCount(options, NO_FILE_OPENS));
ASSERT_EQ(cache_added, TestGetTickerCount(options, BLOCK_CACHE_ADD));
delete iter;
// This test verifies block cache behaviors, which is not used by plain
// table format.
// Exclude kHashCuckoo as it does not support iteration currently
} while (ChangeOptions(kSkipPlainTable | kSkipNoSeekToLast | kSkipHashCuckoo |
kSkipMmapReads));
}
// A delete is skipped for key if KeyMayExist(key) returns False
// Tests Writebatch consistency and proper delete behaviour
TEST_F(DBTest, FilterDeletes) {
do {
anon::OptionsOverride options_override;
options_override.filter_policy.reset(NewBloomFilterPolicy(20));
Options options = CurrentOptions(options_override);
options.filter_deletes = true;
CreateAndReopenWithCF({"pikachu"}, options);
WriteBatch batch;
batch.Delete(handles_[1], "a");
dbfull()->Write(WriteOptions(), &batch);
ASSERT_EQ(AllEntriesFor("a", 1), "[ ]"); // Delete skipped
batch.Clear();
batch.Put(handles_[1], "a", "b");
batch.Delete(handles_[1], "a");
dbfull()->Write(WriteOptions(), &batch);
ASSERT_EQ(Get(1, "a"), "NOT_FOUND");
ASSERT_EQ(AllEntriesFor("a", 1), "[ DEL, b ]"); // Delete issued
batch.Clear();
batch.Delete(handles_[1], "c");
batch.Put(handles_[1], "c", "d");
dbfull()->Write(WriteOptions(), &batch);
ASSERT_EQ(Get(1, "c"), "d");
ASSERT_EQ(AllEntriesFor("c", 1), "[ d ]"); // Delete skipped
batch.Clear();
ASSERT_OK(Flush(1)); // A stray Flush
batch.Delete(handles_[1], "c");
dbfull()->Write(WriteOptions(), &batch);
ASSERT_EQ(AllEntriesFor("c", 1), "[ DEL, d ]"); // Delete issued
batch.Clear();
} while (ChangeCompactOptions());
}
TEST_F(DBTest, GetFilterByPrefixBloom) {
Options options = last_options_;
options.prefix_extractor.reset(NewFixedPrefixTransform(8));
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions bbto;
bbto.filter_policy.reset(NewBloomFilterPolicy(10, false));
bbto.whole_key_filtering = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyAndReopen(options);
WriteOptions wo;
ReadOptions ro;
FlushOptions fo;
fo.wait = true;
std::string value;
ASSERT_OK(dbfull()->Put(wo, "barbarbar", "foo"));
ASSERT_OK(dbfull()->Put(wo, "barbarbar2", "foo2"));
ASSERT_OK(dbfull()->Put(wo, "foofoofoo", "bar"));
dbfull()->Flush(fo);
ASSERT_EQ("foo", Get("barbarbar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
ASSERT_EQ("foo2", Get("barbarbar2"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
ASSERT_EQ("NOT_FOUND", Get("barbarbar3"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
ASSERT_EQ("NOT_FOUND", Get("barfoofoo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("foobarbar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 2);
}
TEST_F(DBTest, WholeKeyFilterProp) {
Options options = last_options_;
options.prefix_extractor.reset(NewFixedPrefixTransform(3));
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions bbto;
bbto.filter_policy.reset(NewBloomFilterPolicy(10, false));
bbto.whole_key_filtering = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyAndReopen(options);
WriteOptions wo;
ReadOptions ro;
FlushOptions fo;
fo.wait = true;
std::string value;
ASSERT_OK(dbfull()->Put(wo, "foobar", "foo"));
// Needs insert some keys to make sure files are not filtered out by key
// ranges.
ASSERT_OK(dbfull()->Put(wo, "aaa", ""));
ASSERT_OK(dbfull()->Put(wo, "zzz", ""));
dbfull()->Flush(fo);
Reopen(options);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
// Reopen with whole key filtering enabled and prefix extractor
// NULL. Bloom filter should be off for both of whole key and
// prefix bloom.
bbto.whole_key_filtering = true;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
options.prefix_extractor.reset();
Reopen(options);
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
// Write DB with only full key filtering.
ASSERT_OK(dbfull()->Put(wo, "foobar", "foo"));
// Needs insert some keys to make sure files are not filtered out by key
// ranges.
ASSERT_OK(dbfull()->Put(wo, "aaa", ""));
ASSERT_OK(dbfull()->Put(wo, "zzz", ""));
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
// Reopen with both of whole key off and prefix extractor enabled.
// Still no bloom filter should be used.
options.prefix_extractor.reset(NewFixedPrefixTransform(3));
bbto.whole_key_filtering = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
Reopen(options);
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
// Try to create a DB with mixed files:
ASSERT_OK(dbfull()->Put(wo, "foobar", "foo"));
// Needs insert some keys to make sure files are not filtered out by key
// ranges.
ASSERT_OK(dbfull()->Put(wo, "aaa", ""));
ASSERT_OK(dbfull()->Put(wo, "zzz", ""));
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
options.prefix_extractor.reset();
bbto.whole_key_filtering = true;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
Reopen(options);
// Try to create a DB with mixed files.
ASSERT_OK(dbfull()->Put(wo, "barfoo", "bar"));
// In this case needs insert some keys to make sure files are
// not filtered out by key ranges.
ASSERT_OK(dbfull()->Put(wo, "aaa", ""));
ASSERT_OK(dbfull()->Put(wo, "zzz", ""));
Flush();
// Now we have two files:
// File 1: An older file with prefix bloom.
// File 2: A newer file with whole bloom filter.
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 2);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 3);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 4);
ASSERT_EQ("bar", Get("barfoo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 4);
// Reopen with the same setting: only whole key is used
Reopen(options);
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 4);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 5);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 6);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 7);
ASSERT_EQ("bar", Get("barfoo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 7);
// Restart with both filters are allowed
options.prefix_extractor.reset(NewFixedPrefixTransform(3));
bbto.whole_key_filtering = true;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
Reopen(options);
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 7);
// File 1 will has it filtered out.
// File 2 will not, as prefix `foo` exists in the file.
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 8);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 10);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 11);
ASSERT_EQ("bar", Get("barfoo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 11);
// Restart with only prefix bloom is allowed.
options.prefix_extractor.reset(NewFixedPrefixTransform(3));
bbto.whole_key_filtering = false;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
Reopen(options);
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 11);
ASSERT_EQ("NOT_FOUND", Get("foo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 11);
ASSERT_EQ("NOT_FOUND", Get("bar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 12);
ASSERT_EQ("foo", Get("foobar"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 12);
ASSERT_EQ("bar", Get("barfoo"));
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 12);
}
TEST_F(DBTest, IterSeekBeforePrev) {
ASSERT_OK(Put("a", "b"));
ASSERT_OK(Put("c", "d"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put("0", "f"));
ASSERT_OK(Put("1", "h"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put("2", "j"));
auto iter = db_->NewIterator(ReadOptions());
iter->Seek(Slice("c"));
iter->Prev();
iter->Seek(Slice("a"));
iter->Prev();
delete iter;
}
namespace {
std::string MakeLongKey(size_t length, char c) {
return std::string(length, c);
}
} // namespace
TEST_F(DBTest, IterLongKeys) {
ASSERT_OK(Put(MakeLongKey(20, 0), "0"));
ASSERT_OK(Put(MakeLongKey(32, 2), "2"));
ASSERT_OK(Put("a", "b"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put(MakeLongKey(50, 1), "1"));
ASSERT_OK(Put(MakeLongKey(127, 3), "3"));
ASSERT_OK(Put(MakeLongKey(64, 4), "4"));
auto iter = db_->NewIterator(ReadOptions());
// Create a key that needs to be skipped for Seq too new
iter->Seek(MakeLongKey(20, 0));
ASSERT_EQ(IterStatus(iter), MakeLongKey(20, 0) + "->0");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(50, 1) + "->1");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(32, 2) + "->2");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(127, 3) + "->3");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(64, 4) + "->4");
delete iter;
iter = db_->NewIterator(ReadOptions());
iter->Seek(MakeLongKey(50, 1));
ASSERT_EQ(IterStatus(iter), MakeLongKey(50, 1) + "->1");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(32, 2) + "->2");
iter->Next();
ASSERT_EQ(IterStatus(iter), MakeLongKey(127, 3) + "->3");
delete iter;
}
TEST_F(DBTest, IterNextWithNewerSeq) {
ASSERT_OK(Put("0", "0"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put("a", "b"));
ASSERT_OK(Put("c", "d"));
ASSERT_OK(Put("d", "e"));
auto iter = db_->NewIterator(ReadOptions());
// Create a key that needs to be skipped for Seq too new
for (uint64_t i = 0; i < last_options_.max_sequential_skip_in_iterations + 1;
i++) {
ASSERT_OK(Put("b", "f"));
}
iter->Seek(Slice("a"));
ASSERT_EQ(IterStatus(iter), "a->b");
iter->Next();
ASSERT_EQ(IterStatus(iter), "c->d");
delete iter;
}
TEST_F(DBTest, IterPrevWithNewerSeq) {
ASSERT_OK(Put("0", "0"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put("a", "b"));
ASSERT_OK(Put("c", "d"));
ASSERT_OK(Put("d", "e"));
auto iter = db_->NewIterator(ReadOptions());
// Create a key that needs to be skipped for Seq too new
for (uint64_t i = 0; i < last_options_.max_sequential_skip_in_iterations + 1;
i++) {
ASSERT_OK(Put("b", "f"));
}
iter->Seek(Slice("d"));
ASSERT_EQ(IterStatus(iter), "d->e");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "c->d");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "a->b");
iter->Prev();
delete iter;
}
TEST_F(DBTest, IterPrevWithNewerSeq2) {
ASSERT_OK(Put("0", "0"));
dbfull()->Flush(FlushOptions());
ASSERT_OK(Put("a", "b"));
ASSERT_OK(Put("c", "d"));
ASSERT_OK(Put("d", "e"));
auto iter = db_->NewIterator(ReadOptions());
iter->Seek(Slice("c"));
ASSERT_EQ(IterStatus(iter), "c->d");
// Create a key that needs to be skipped for Seq too new
for (uint64_t i = 0; i < last_options_.max_sequential_skip_in_iterations + 1;
i++) {
ASSERT_OK(Put("b", "f"));
}
iter->Prev();
ASSERT_EQ(IterStatus(iter), "a->b");
iter->Prev();
delete iter;
}
TEST_F(DBTest, IterEmpty) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->Seek("foo");
ASSERT_EQ(IterStatus(iter), "(invalid)");
delete iter;
} while (ChangeCompactOptions());
}
TEST_F(DBTest, IterSingle) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "a", "va"));
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->Seek("");
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->Seek("a");
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->Seek("b");
ASSERT_EQ(IterStatus(iter), "(invalid)");
delete iter;
} while (ChangeCompactOptions());
}
TEST_F(DBTest, IterMulti) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "a", "va"));
ASSERT_OK(Put(1, "b", "vb"));
ASSERT_OK(Put(1, "c", "vc"));
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Next();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->Seek("");
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Seek("a");
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Seek("ax");
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Seek("b");
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Seek("z");
ASSERT_EQ(IterStatus(iter), "(invalid)");
// Switch from reverse to forward
iter->SeekToLast();
iter->Prev();
iter->Prev();
iter->Next();
ASSERT_EQ(IterStatus(iter), "b->vb");
// Switch from forward to reverse
iter->SeekToFirst();
iter->Next();
iter->Next();
iter->Prev();
ASSERT_EQ(IterStatus(iter), "b->vb");
// Make sure iter stays at snapshot
ASSERT_OK(Put(1, "a", "va2"));
ASSERT_OK(Put(1, "a2", "va3"));
ASSERT_OK(Put(1, "b", "vb2"));
ASSERT_OK(Put(1, "c", "vc2"));
ASSERT_OK(Delete(1, "b"));
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Next();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "b->vb");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
delete iter;
} while (ChangeCompactOptions());
}
// Check that we can skip over a run of user keys
// by using reseek rather than sequential scan
TEST_F(DBTest, IterReseek) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
Options options = CurrentOptions(options_override);
options.max_sequential_skip_in_iterations = 3;
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
// insert two keys with same userkey and verify that
// reseek is not invoked. For each of these test cases,
// verify that we can find the next key "b".
ASSERT_OK(Put(1, "a", "one"));
ASSERT_OK(Put(1, "a", "two"));
ASSERT_OK(Put(1, "b", "bone"));
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 0);
ASSERT_EQ(IterStatus(iter), "a->two");
iter->Next();
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 0);
ASSERT_EQ(IterStatus(iter), "b->bone");
delete iter;
// insert a total of three keys with same userkey and verify
// that reseek is still not invoked.
ASSERT_OK(Put(1, "a", "three"));
iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->three");
iter->Next();
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 0);
ASSERT_EQ(IterStatus(iter), "b->bone");
delete iter;
// insert a total of four keys with same userkey and verify
// that reseek is invoked.
ASSERT_OK(Put(1, "a", "four"));
iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->four");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 0);
iter->Next();
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 1);
ASSERT_EQ(IterStatus(iter), "b->bone");
delete iter;
// Testing reverse iterator
// At this point, we have three versions of "a" and one version of "b".
// The reseek statistics is already at 1.
int num_reseeks =
(int)TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION);
// Insert another version of b and assert that reseek is not invoked
ASSERT_OK(Put(1, "b", "btwo"));
iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "b->btwo");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION),
num_reseeks);
iter->Prev();
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION),
num_reseeks + 1);
ASSERT_EQ(IterStatus(iter), "a->four");
delete iter;
// insert two more versions of b. This makes a total of 4 versions
// of b and 4 versions of a.
ASSERT_OK(Put(1, "b", "bthree"));
ASSERT_OK(Put(1, "b", "bfour"));
iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "b->bfour");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION),
num_reseeks + 2);
iter->Prev();
// the previous Prev call should have invoked reseek
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION),
num_reseeks + 3);
ASSERT_EQ(IterStatus(iter), "a->four");
delete iter;
}
TEST_F(DBTest, IterSmallAndLargeMix) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "a", "va"));
ASSERT_OK(Put(1, "b", std::string(100000, 'b')));
ASSERT_OK(Put(1, "c", "vc"));
ASSERT_OK(Put(1, "d", std::string(100000, 'd')));
ASSERT_OK(Put(1, "e", std::string(100000, 'e')));
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Next();
ASSERT_EQ(IterStatus(iter), "b->" + std::string(100000, 'b'));
iter->Next();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Next();
ASSERT_EQ(IterStatus(iter), "d->" + std::string(100000, 'd'));
iter->Next();
ASSERT_EQ(IterStatus(iter), "e->" + std::string(100000, 'e'));
iter->Next();
ASSERT_EQ(IterStatus(iter), "(invalid)");
iter->SeekToLast();
ASSERT_EQ(IterStatus(iter), "e->" + std::string(100000, 'e'));
iter->Prev();
ASSERT_EQ(IterStatus(iter), "d->" + std::string(100000, 'd'));
iter->Prev();
ASSERT_EQ(IterStatus(iter), "c->vc");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "b->" + std::string(100000, 'b'));
iter->Prev();
ASSERT_EQ(IterStatus(iter), "a->va");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "(invalid)");
delete iter;
} while (ChangeCompactOptions());
}
TEST_F(DBTest, IterMultiWithDelete) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "ka", "va"));
ASSERT_OK(Put(1, "kb", "vb"));
ASSERT_OK(Put(1, "kc", "vc"));
ASSERT_OK(Delete(1, "kb"));
ASSERT_EQ("NOT_FOUND", Get(1, "kb"));
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
iter->Seek("kc");
ASSERT_EQ(IterStatus(iter), "kc->vc");
if (!CurrentOptions().merge_operator) {
// TODO: merge operator does not support backward iteration yet
if (kPlainTableAllBytesPrefix != option_config_&&
kBlockBasedTableWithWholeKeyHashIndex != option_config_ &&
kHashLinkList != option_config_) {
iter->Prev();
ASSERT_EQ(IterStatus(iter), "ka->va");
}
}
delete iter;
} while (ChangeOptions());
}
TEST_F(DBTest, IterPrevMaxSkip) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
for (int i = 0; i < 2; i++) {
ASSERT_OK(Put(1, "key1", "v1"));
ASSERT_OK(Put(1, "key2", "v2"));
ASSERT_OK(Put(1, "key3", "v3"));
ASSERT_OK(Put(1, "key4", "v4"));
ASSERT_OK(Put(1, "key5", "v5"));
}
VerifyIterLast("key5->v5", 1);
ASSERT_OK(Delete(1, "key5"));
VerifyIterLast("key4->v4", 1);
ASSERT_OK(Delete(1, "key4"));
VerifyIterLast("key3->v3", 1);
ASSERT_OK(Delete(1, "key3"));
VerifyIterLast("key2->v2", 1);
ASSERT_OK(Delete(1, "key2"));
VerifyIterLast("key1->v1", 1);
ASSERT_OK(Delete(1, "key1"));
VerifyIterLast("(invalid)", 1);
} while (ChangeOptions(kSkipMergePut | kSkipNoSeekToLast));
}
TEST_F(DBTest, IterWithSnapshot) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions(options_override));
ASSERT_OK(Put(1, "key1", "val1"));
ASSERT_OK(Put(1, "key2", "val2"));
ASSERT_OK(Put(1, "key3", "val3"));
ASSERT_OK(Put(1, "key4", "val4"));
ASSERT_OK(Put(1, "key5", "val5"));
const Snapshot *snapshot = db_->GetSnapshot();
ReadOptions options;
options.snapshot = snapshot;
Iterator* iter = db_->NewIterator(options, handles_[1]);
// Put more values after the snapshot
ASSERT_OK(Put(1, "key100", "val100"));
ASSERT_OK(Put(1, "key101", "val101"));
iter->Seek("key5");
ASSERT_EQ(IterStatus(iter), "key5->val5");
if (!CurrentOptions().merge_operator) {
// TODO: merge operator does not support backward iteration yet
if (kPlainTableAllBytesPrefix != option_config_&&
kBlockBasedTableWithWholeKeyHashIndex != option_config_ &&
kHashLinkList != option_config_) {
iter->Prev();
ASSERT_EQ(IterStatus(iter), "key4->val4");
iter->Prev();
ASSERT_EQ(IterStatus(iter), "key3->val3");
iter->Next();
ASSERT_EQ(IterStatus(iter), "key4->val4");
iter->Next();
ASSERT_EQ(IterStatus(iter), "key5->val5");
}
iter->Next();
ASSERT_TRUE(!iter->Valid());
}
db_->ReleaseSnapshot(snapshot);
delete iter;
// skip as HashCuckooRep does not support snapshot
} while (ChangeOptions(kSkipHashCuckoo));
}
TEST_F(DBTest, Recover) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "baz", "v5"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v5", Get(1, "baz"));
ASSERT_OK(Put(1, "bar", "v2"));
ASSERT_OK(Put(1, "foo", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v3", Get(1, "foo"));
ASSERT_OK(Put(1, "foo", "v4"));
ASSERT_EQ("v4", Get(1, "foo"));
ASSERT_EQ("v2", Get(1, "bar"));
ASSERT_EQ("v5", Get(1, "baz"));
} while (ChangeOptions());
}
TEST_F(DBTest, RecoverWithTableHandle) {
do {
Options options;
options.create_if_missing = true;
options.write_buffer_size = 100;
options.disable_auto_compactions = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "bar", "v2"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "v3"));
ASSERT_OK(Put(1, "bar", "v4"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "big", std::string(100, 'a')));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
std::vector<std::vector<FileMetaData>> files;
dbfull()->TEST_GetFilesMetaData(handles_[1], &files);
int total_files = 0;
for (const auto& level : files) {
total_files += level.size();
}
ASSERT_EQ(total_files, 3);
for (const auto& level : files) {
for (const auto& file : level) {
if (kInfiniteMaxOpenFiles == option_config_) {
ASSERT_TRUE(file.table_reader_handle != nullptr);
} else {
ASSERT_TRUE(file.table_reader_handle == nullptr);
}
}
}
} while (ChangeOptions());
}
TEST_F(DBTest, IgnoreRecoveredLog) {
std::string backup_logs = dbname_ + "/backup_logs";
// delete old files in backup_logs directory
env_->CreateDirIfMissing(backup_logs);
std::vector<std::string> old_files;
env_->GetChildren(backup_logs, &old_files);
for (auto& file : old_files) {
if (file != "." && file != "..") {
env_->DeleteFile(backup_logs + "/" + file);
}
}
do {
Options options = CurrentOptions();
options.create_if_missing = true;
options.merge_operator = MergeOperators::CreateUInt64AddOperator();
options.wal_dir = dbname_ + "/logs";
DestroyAndReopen(options);
// fill up the DB
std::string one, two;
PutFixed64(&one, 1);
PutFixed64(&two, 2);
ASSERT_OK(db_->Merge(WriteOptions(), Slice("foo"), Slice(one)));
ASSERT_OK(db_->Merge(WriteOptions(), Slice("foo"), Slice(one)));
ASSERT_OK(db_->Merge(WriteOptions(), Slice("bar"), Slice(one)));
// copy the logs to backup
std::vector<std::string> logs;
env_->GetChildren(options.wal_dir, &logs);
for (auto& log : logs) {
if (log != ".." && log != ".") {
CopyFile(options.wal_dir + "/" + log, backup_logs + "/" + log);
}
}
// recover the DB
Reopen(options);
ASSERT_EQ(two, Get("foo"));
ASSERT_EQ(one, Get("bar"));
Close();
// copy the logs from backup back to wal dir
for (auto& log : logs) {
if (log != ".." && log != ".") {
CopyFile(backup_logs + "/" + log, options.wal_dir + "/" + log);
}
}
// this should ignore the log files, recovery should not happen again
// if the recovery happens, the same merge operator would be called twice,
// leading to incorrect results
Reopen(options);
ASSERT_EQ(two, Get("foo"));
ASSERT_EQ(one, Get("bar"));
Close();
Destroy(options);
Reopen(options);
Close();
// copy the logs from backup back to wal dir
env_->CreateDirIfMissing(options.wal_dir);
for (auto& log : logs) {
if (log != ".." && log != ".") {
CopyFile(backup_logs + "/" + log, options.wal_dir + "/" + log);
}
}
// assert that we successfully recovered only from logs, even though we
// destroyed the DB
Reopen(options);
ASSERT_EQ(two, Get("foo"));
ASSERT_EQ(one, Get("bar"));
// Recovery will fail if DB directory doesn't exist.
Destroy(options);
// copy the logs from backup back to wal dir
env_->CreateDirIfMissing(options.wal_dir);
for (auto& log : logs) {
if (log != ".." && log != ".") {
CopyFile(backup_logs + "/" + log, options.wal_dir + "/" + log);
// we won't be needing this file no more
env_->DeleteFile(backup_logs + "/" + log);
}
}
Status s = TryReopen(options);
ASSERT_TRUE(!s.ok());
} while (ChangeOptions(kSkipHashCuckoo));
}
TEST_F(DBTest, CheckLock) {
do {
DB* localdb;
Options options = CurrentOptions();
ASSERT_OK(TryReopen(options));
// second open should fail
ASSERT_TRUE(!(DB::Open(options, dbname_, &localdb)).ok());
} while (ChangeCompactOptions());
}
TEST_F(DBTest, FlushMultipleMemtable) {
do {
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.max_write_buffer_number = 4;
options.min_write_buffer_number_to_merge = 3;
options.max_write_buffer_number_to_maintain = -1;
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v1"));
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "bar"));
ASSERT_OK(Flush(1));
} while (ChangeCompactOptions());
}
TEST_F(DBTest, NumImmutableMemTable) {
do {
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.max_write_buffer_number = 4;
options.min_write_buffer_number_to_merge = 3;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
CreateAndReopenWithCF({"pikachu"}, options);
std::string big_value(1000000 * 2, 'x');
std::string num;
SetPerfLevel(kEnableTime);;
ASSERT_TRUE(GetPerfLevel() == kEnableTime);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k1", big_value));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(1, (int) perf_context.get_from_memtable_count);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(2, (int) perf_context.get_from_memtable_count);
perf_context.Reset();
Get(1, "k2");
ASSERT_EQ(1, (int) perf_context.get_from_memtable_count);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k3", big_value));
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.cur-size-active-mem-table", &num));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "2");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &num));
ASSERT_EQ(num, "2");
perf_context.Reset();
Get(1, "k2");
ASSERT_EQ(2, (int) perf_context.get_from_memtable_count);
perf_context.Reset();
Get(1, "k3");
ASSERT_EQ(1, (int) perf_context.get_from_memtable_count);
perf_context.Reset();
Get(1, "k1");
ASSERT_EQ(3, (int) perf_context.get_from_memtable_count);
ASSERT_OK(Flush(1));
ASSERT_TRUE(dbfull()->GetProperty(handles_[1],
"rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.cur-size-active-mem-table", &num));
// "200" is the size of the metadata of an empty skiplist, this would
// break if we change the default skiplist implementation
ASSERT_EQ(num, "200");
uint64_t int_num;
uint64_t base_total_size;
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.estimate-num-keys", &base_total_size));
ASSERT_OK(dbfull()->Delete(writeOpt, handles_[1], "k2"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k3", ""));
ASSERT_OK(dbfull()->Delete(writeOpt, handles_[1], "k3"));
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-deletes-active-mem-table", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &int_num));
ASSERT_EQ(int_num, 3U);
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "k2", big_value));
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-entries-imm-mem-tables", &int_num));
ASSERT_EQ(int_num, 4U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.num-deletes-imm-mem-tables", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.estimate-num-keys", &int_num));
ASSERT_EQ(int_num, base_total_size + 1);
SetPerfLevel(kDisable);
ASSERT_TRUE(GetPerfLevel() == kDisable);
} while (ChangeCompactOptions());
}
TEST_F(DBTest, FlushEmptyColumnFamily) {
// Block flush thread and disable compaction thread
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
test::SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_task_high, Env::Priority::HIGH);
Options options = CurrentOptions();
// disable compaction
options.disable_auto_compactions = true;
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.max_write_buffer_number = 2;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 1;
CreateAndReopenWithCF({"pikachu"}, options);
// Compaction can still go through even if no thread can flush the
// mem table.
ASSERT_OK(Flush(0));
ASSERT_OK(Flush(1));
// Insert can go through
ASSERT_OK(dbfull()->Put(writeOpt, handles_[0], "foo", "v1"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v1"));
ASSERT_EQ("v1", Get(0, "foo"));
ASSERT_EQ("v1", Get(1, "bar"));
sleeping_task_high.WakeUp();
sleeping_task_high.WaitUntilDone();
// Flush can still go through.
ASSERT_OK(Flush(0));
ASSERT_OK(Flush(1));
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
}
TEST_F(DBTest, GetProperty) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
test::SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_task_high, Env::Priority::HIGH);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleUniversal;
options.level0_file_num_compaction_trigger = 1;
options.compaction_options_universal.size_ratio = 50;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
SetPerfLevel(kEnableTime);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-live-data-size", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "1");
perf_context.Reset();
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_OK(dbfull()->Delete(writeOpt, "k-non-existing"));
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "2");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "2");
// Verify the same set of properties through GetIntProperty
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-immutable-mem-table", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.mem-table-flush-pending", &int_num));
ASSERT_EQ(int_num, 1U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.compaction-pending", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
sleeping_task_high.WakeUp();
sleeping_task_high.WaitUntilDone();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_OK(dbfull()->Put(writeOpt, "k4", big_value));
ASSERT_OK(dbfull()->Put(writeOpt, "k5", big_value));
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "4");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
// Wait for compaction to be done. This is important because otherwise RocksDB
// might schedule a compaction when reopening the database, failing assertion
// (A) as a result.
dbfull()->TEST_WaitForCompact();
options.max_open_files = 10;
Reopen(options);
// After reopening, no table reader is loaded, so no memory for table readers
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U); // (A)
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_GT(int_num, 0U);
// After reading a key, at least one table reader is loaded.
Get("k5");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
// Test rocksdb.num-live-versions
{
options.level0_file_num_compaction_trigger = 20;
Reopen(options);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k6", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k7", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 3U);
iter2.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
iter1.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
}
}
TEST_F(DBTest, ApproximateMemoryUsage) {
const int kNumRounds = 10;
// TODO(noetzli) kFlushesPerRound does not really correlate with how many
// flushes happen.
const int kFlushesPerRound = 10;
const int kWritesPerFlush = 10;
const int kKeySize = 100;
const int kValueSize = 1000;
Options options;
options.write_buffer_size = 1000; // small write buffer
options.min_write_buffer_number_to_merge = 4;
options.compression = kNoCompression;
options.create_if_missing = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
Random rnd(301);
std::vector<Iterator*> iters;
uint64_t active_mem;
uint64_t unflushed_mem;
uint64_t all_mem;
uint64_t prev_all_mem;
// Phase 0. The verify the initial value of all these properties are the same
// as we have no mem-tables.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(all_mem, active_mem);
ASSERT_EQ(all_mem, unflushed_mem);
// Phase 1. Simply issue Put() and expect "cur-size-all-mem-tables" equals to
// "size-all-mem-tables"
for (int r = 0; r < kNumRounds; ++r) {
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Make sure that there is no flush between getting the two properties.
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// in no iterator case, these two number should be the same.
ASSERT_EQ(unflushed_mem, all_mem);
}
prev_all_mem = all_mem;
// Phase 2. Keep issuing Put() but also create new iterators. This time we
// expect "size-all-mem-tables" > "cur-size-all-mem-tables".
for (int r = 0; r < kNumRounds; ++r) {
iters.push_back(db_->NewIterator(ReadOptions()));
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Force flush to prevent flush from happening between getting the
// properties or after getting the properties and before the new round.
Flush();
// In the second round, add iterators.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_GT(all_mem, active_mem);
ASSERT_GT(all_mem, unflushed_mem);
ASSERT_GT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Phase 3. Delete iterators and expect "size-all-mem-tables" shrinks
// whenever we release an iterator.
for (auto* iter : iters) {
delete iter;
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// Expect the size shrinking
ASSERT_LT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Expect all these three counters to be the same.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
// Phase 5. Reopen, and expect all these three counters to be the same again.
Reopen(options);
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
}
TEST_F(DBTest, EstimatePendingCompBytes) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 2;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
}
TEST_F(DBTest, FLUSH) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
SetPerfLevel(kEnableTime);;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v1"));
// this will now also flush the last 2 writes
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v1"));
perf_context.Reset();
Get(1, "foo");
ASSERT_TRUE((int) perf_context.get_from_output_files_time > 0);
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "bar"));
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v2"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v2"));
ASSERT_OK(Flush(1));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v2", Get(1, "bar"));
perf_context.Reset();
ASSERT_EQ("v2", Get(1, "foo"));
ASSERT_TRUE((int) perf_context.get_from_output_files_time > 0);
writeOpt.disableWAL = false;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v3"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v3"));
ASSERT_OK(Flush(1));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
// 'foo' should be there because its put
// has WAL enabled.
ASSERT_EQ("v3", Get(1, "foo"));
ASSERT_EQ("v3", Get(1, "bar"));
SetPerfLevel(kDisable);
} while (ChangeCompactOptions());
}
TEST_F(DBTest, RecoveryWithEmptyLog) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "foo", "v2"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v3", Get(1, "foo"));
} while (ChangeOptions());
}
TEST_F(DBTest, FlushSchedule) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.level0_stop_writes_trigger = 1 << 10;
options.level0_slowdown_writes_trigger = 1 << 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 1;
options.max_write_buffer_number = 2;
options.write_buffer_size = 120 * 1024;
CreateAndReopenWithCF({"pikachu"}, options);
std::vector<std::thread> threads;
std::atomic<int> thread_num(0);
// each column family will have 5 thread, each thread generating 2 memtables.
// each column family should end up with 10 table files
std::function<void()> fill_memtable_func = [&]() {
int a = thread_num.fetch_add(1);
Random rnd(a);
WriteOptions wo;
// this should fill up 2 memtables
for (int k = 0; k < 5000; ++k) {
ASSERT_OK(db_->Put(wo, handles_[a & 1], RandomString(&rnd, 13), ""));
}
};
for (int i = 0; i < 10; ++i) {
threads.emplace_back(fill_memtable_func);
}
for (auto& t : threads) {
t.join();
}
auto default_tables = GetNumberOfSstFilesForColumnFamily(db_, "default");
auto pikachu_tables = GetNumberOfSstFilesForColumnFamily(db_, "pikachu");
ASSERT_LE(default_tables, static_cast<uint64_t>(10));
ASSERT_GT(default_tables, static_cast<uint64_t>(0));
ASSERT_LE(pikachu_tables, static_cast<uint64_t>(10));
ASSERT_GT(pikachu_tables, static_cast<uint64_t>(0));
}
TEST_F(DBTest, ManifestRollOver) {
do {
Options options;
options.max_manifest_file_size = 10 ; // 10 bytes
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
{
ASSERT_OK(Put(1, "manifest_key1", std::string(1000, '1')));
ASSERT_OK(Put(1, "manifest_key2", std::string(1000, '2')));
ASSERT_OK(Put(1, "manifest_key3", std::string(1000, '3')));
uint64_t manifest_before_flush = dbfull()->TEST_Current_Manifest_FileNo();
ASSERT_OK(Flush(1)); // This should trigger LogAndApply.
uint64_t manifest_after_flush = dbfull()->TEST_Current_Manifest_FileNo();
ASSERT_GT(manifest_after_flush, manifest_before_flush);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_GT(dbfull()->TEST_Current_Manifest_FileNo(), manifest_after_flush);
// check if a new manifest file got inserted or not.
ASSERT_EQ(std::string(1000, '1'), Get(1, "manifest_key1"));
ASSERT_EQ(std::string(1000, '2'), Get(1, "manifest_key2"));
ASSERT_EQ(std::string(1000, '3'), Get(1, "manifest_key3"));
}
} while (ChangeCompactOptions());
}
TEST_F(DBTest, IdentityAcrossRestarts) {
do {
std::string id1;
ASSERT_OK(db_->GetDbIdentity(id1));
Options options = CurrentOptions();
Reopen(options);
std::string id2;
ASSERT_OK(db_->GetDbIdentity(id2));
// id1 should match id2 because identity was not regenerated
ASSERT_EQ(id1.compare(id2), 0);
std::string idfilename = IdentityFileName(dbname_);
ASSERT_OK(env_->DeleteFile(idfilename));
Reopen(options);
std::string id3;
ASSERT_OK(db_->GetDbIdentity(id3));
// id1 should NOT match id3 because identity was regenerated
ASSERT_NE(id1.compare(id3), 0);
} while (ChangeCompactOptions());
}
TEST_F(DBTest, RecoverWithLargeLog) {
do {
{
Options options = CurrentOptions();
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "big1", std::string(200000, '1')));
ASSERT_OK(Put(1, "big2", std::string(200000, '2')));
ASSERT_OK(Put(1, "small3", std::string(10, '3')));
ASSERT_OK(Put(1, "small4", std::string(10, '4')));
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
}
// Make sure that if we re-open with a small write buffer size that
// we flush table files in the middle of a large log file.
Options options;
options.write_buffer_size = 100000;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 3);
ASSERT_EQ(std::string(200000, '1'), Get(1, "big1"));
ASSERT_EQ(std::string(200000, '2'), Get(1, "big2"));
ASSERT_EQ(std::string(10, '3'), Get(1, "small3"));
ASSERT_EQ(std::string(10, '4'), Get(1, "small4"));
ASSERT_GT(NumTableFilesAtLevel(0, 1), 1);
} while (ChangeCompactOptions());
}
namespace {
class KeepFilter : public CompactionFilter {
public:
virtual bool Filter(int level, const Slice& key, const Slice& value,
std::string* new_value, bool* value_changed) const
override {
return false;
}
virtual const char* Name() const override { return "KeepFilter"; }
};
class KeepFilterFactory : public CompactionFilterFactory {
public:
explicit KeepFilterFactory(bool check_context = false)
: check_context_(check_context) {}
virtual std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context& context) override {
if (check_context_) {
EXPECT_EQ(expect_full_compaction_.load(), context.is_full_compaction);
EXPECT_EQ(expect_manual_compaction_.load(), context.is_manual_compaction);
}
return std::unique_ptr<CompactionFilter>(new KeepFilter());
}
virtual const char* Name() const override { return "KeepFilterFactory"; }
bool check_context_;
std::atomic_bool expect_full_compaction_;
std::atomic_bool expect_manual_compaction_;
};
class DelayFilter : public CompactionFilter {
public:
explicit DelayFilter(DBTestBase* d) : db_test(d) {}
virtual bool Filter(int level, const Slice& key, const Slice& value,
std::string* new_value,
bool* value_changed) const override {
db_test->env_->addon_time_.fetch_add(1000);
return true;
}
virtual const char* Name() const override { return "DelayFilter"; }
private:
DBTestBase* db_test;
};
class DelayFilterFactory : public CompactionFilterFactory {
public:
explicit DelayFilterFactory(DBTestBase* d) : db_test(d) {}
virtual std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context& context) override {
return std::unique_ptr<CompactionFilter>(new DelayFilter(db_test));
}
virtual const char* Name() const override { return "DelayFilterFactory"; }
private:
DBTestBase* db_test;
};
} // namespace
TEST_F(DBTest, CompressedCache) {
if (!Snappy_Supported()) {
return;
}
int num_iter = 80;
// Run this test three iterations.
// Iteration 1: only a uncompressed block cache
// Iteration 2: only a compressed block cache
// Iteration 3: both block cache and compressed cache
// Iteration 4: both block cache and compressed cache, but DB is not
// compressed
for (int iter = 0; iter < 4; iter++) {
Options options;
options.write_buffer_size = 64*1024; // small write buffer
options.statistics = rocksdb::CreateDBStatistics();
options = CurrentOptions(options);
BlockBasedTableOptions table_options;
switch (iter) {
case 0:
// only uncompressed block cache
table_options.block_cache = NewLRUCache(8*1024);
table_options.block_cache_compressed = nullptr;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
break;
case 1:
// no block cache, only compressed cache
table_options.no_block_cache = true;
table_options.block_cache = nullptr;
table_options.block_cache_compressed = NewLRUCache(8*1024);
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
break;
case 2:
// both compressed and uncompressed block cache
table_options.block_cache = NewLRUCache(1024);
table_options.block_cache_compressed = NewLRUCache(8*1024);
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
break;
case 3:
// both block cache and compressed cache, but DB is not compressed
// also, make block cache sizes bigger, to trigger block cache hits
table_options.block_cache = NewLRUCache(1024 * 1024);
table_options.block_cache_compressed = NewLRUCache(8 * 1024 * 1024);
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.compression = kNoCompression;
break;
default:
ASSERT_TRUE(false);
}
CreateAndReopenWithCF({"pikachu"}, options);
// default column family doesn't have block cache
Options no_block_cache_opts;
no_block_cache_opts.statistics = options.statistics;
no_block_cache_opts = CurrentOptions(no_block_cache_opts);
BlockBasedTableOptions table_options_no_bc;
table_options_no_bc.no_block_cache = true;
no_block_cache_opts.table_factory.reset(
NewBlockBasedTableFactory(table_options_no_bc));
ReopenWithColumnFamilies({"default", "pikachu"},
std::vector<Options>({no_block_cache_opts, options}));
Random rnd(301);
// Write 8MB (80 values, each 100K)
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
std::vector<std::string> values;
std::string str;
for (int i = 0; i < num_iter; i++) {
if (i % 4 == 0) { // high compression ratio
str = RandomString(&rnd, 1000);
}
values.push_back(str);
ASSERT_OK(Put(1, Key(i), values[i]));
}
// flush all data from memtable so that reads are from block cache
ASSERT_OK(Flush(1));
for (int i = 0; i < num_iter; i++) {
ASSERT_EQ(Get(1, Key(i)), values[i]);
}
// check that we triggered the appropriate code paths in the cache
switch (iter) {
case 0:
// only uncompressed block cache
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
break;
case 1:
// no block cache, only compressed cache
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
break;
case 2:
// both compressed and uncompressed block cache
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
break;
case 3:
// both compressed and uncompressed block cache
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_HIT), 0);
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
// compressed doesn't have any hits since blocks are not compressed on
// storage
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_HIT), 0);
break;
default:
ASSERT_TRUE(false);
}
options.create_if_missing = true;
DestroyAndReopen(options);
}
}
static std::string CompressibleString(Random* rnd, int len) {
std::string r;
test::CompressibleString(rnd, 0.8, len, &r);
return r;
}
TEST_F(DBTest, FailMoreDbPaths) {
Options options = CurrentOptions();
options.db_paths.emplace_back(dbname_, 10000000);
options.db_paths.emplace_back(dbname_ + "_2", 1000000);
options.db_paths.emplace_back(dbname_ + "_3", 1000000);
options.db_paths.emplace_back(dbname_ + "_4", 1000000);
options.db_paths.emplace_back(dbname_ + "_5", 1000000);
ASSERT_TRUE(TryReopen(options).IsNotSupported());
}
void CheckColumnFamilyMeta(const ColumnFamilyMetaData& cf_meta) {
uint64_t cf_size = 0;
uint64_t cf_csize = 0;
size_t file_count = 0;
for (auto level_meta : cf_meta.levels) {
uint64_t level_size = 0;
uint64_t level_csize = 0;
file_count += level_meta.files.size();
for (auto file_meta : level_meta.files) {
level_size += file_meta.size;
}
ASSERT_EQ(level_meta.size, level_size);
cf_size += level_size;
cf_csize += level_csize;
}
ASSERT_EQ(cf_meta.file_count, file_count);
ASSERT_EQ(cf_meta.size, cf_size);
}
TEST_F(DBTest, ColumnFamilyMetaDataTest) {
Options options = CurrentOptions();
options.create_if_missing = true;
DestroyAndReopen(options);
Random rnd(301);
int key_index = 0;
ColumnFamilyMetaData cf_meta;
for (int i = 0; i < 100; ++i) {
GenerateNewFile(&rnd, &key_index);
db_->GetColumnFamilyMetaData(&cf_meta);
CheckColumnFamilyMeta(cf_meta);
}
}
namespace {
void MinLevelHelper(DBTest* self, Options& options) {
Random rnd(301);
for (int num = 0;
num < options.level0_file_num_compaction_trigger - 1;
num++)
{
std::vector<std::string> values;
// Write 120KB (12 values, each 10K)
for (int i = 0; i < 12; i++) {
values.push_back(DBTestBase::RandomString(&rnd, 10000));
ASSERT_OK(self->Put(DBTestBase::Key(i), values[i]));
}
self->dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ(self->NumTableFilesAtLevel(0), num + 1);
}
//generate one more file in level-0, and should trigger level-0 compaction
std::vector<std::string> values;
for (int i = 0; i < 12; i++) {
values.push_back(DBTestBase::RandomString(&rnd, 10000));
ASSERT_OK(self->Put(DBTestBase::Key(i), values[i]));
}
self->dbfull()->TEST_WaitForCompact();
ASSERT_EQ(self->NumTableFilesAtLevel(0), 0);
ASSERT_EQ(self->NumTableFilesAtLevel(1), 1);
}
// returns false if the calling-Test should be skipped
bool MinLevelToCompress(CompressionType& type, Options& options, int wbits,
int lev, int strategy) {
fprintf(stderr, "Test with compression options : window_bits = %d, level = %d, strategy = %d}\n", wbits, lev, strategy);
options.write_buffer_size = 100<<10; //100KB
options.arena_block_size = 4096;
options.num_levels = 3;
options.level0_file_num_compaction_trigger = 3;
options.create_if_missing = true;
if (Snappy_Supported()) {
type = kSnappyCompression;
fprintf(stderr, "using snappy\n");
} else if (Zlib_Supported()) {
type = kZlibCompression;
fprintf(stderr, "using zlib\n");
} else if (BZip2_Supported()) {
type = kBZip2Compression;
fprintf(stderr, "using bzip2\n");
} else if (LZ4_Supported()) {
type = kLZ4Compression;
fprintf(stderr, "using lz4\n");
} else {
fprintf(stderr, "skipping test, compression disabled\n");
return false;
}
options.compression_per_level.resize(options.num_levels);
// do not compress L0
for (int i = 0; i < 1; i++) {
options.compression_per_level[i] = kNoCompression;
}
for (int i = 1; i < options.num_levels; i++) {
options.compression_per_level[i] = type;
}
return true;
}
} // namespace
TEST_F(DBTest, MinLevelToCompress1) {
Options options = CurrentOptions();
CompressionType type = kSnappyCompression;
if (!MinLevelToCompress(type, options, -14, -1, 0)) {
return;
}
Reopen(options);
MinLevelHelper(this, options);
// do not compress L0 and L1
for (int i = 0; i < 2; i++) {
options.compression_per_level[i] = kNoCompression;
}
for (int i = 2; i < options.num_levels; i++) {
options.compression_per_level[i] = type;
}
DestroyAndReopen(options);
MinLevelHelper(this, options);
}
TEST_F(DBTest, MinLevelToCompress2) {
Options options = CurrentOptions();
CompressionType type = kSnappyCompression;
if (!MinLevelToCompress(type, options, 15, -1, 0)) {
return;
}
Reopen(options);
MinLevelHelper(this, options);
// do not compress L0 and L1
for (int i = 0; i < 2; i++) {
options.compression_per_level[i] = kNoCompression;
}
for (int i = 2; i < options.num_levels; i++) {
options.compression_per_level[i] = type;
}
DestroyAndReopen(options);
MinLevelHelper(this, options);
}
TEST_F(DBTest, RepeatedWritesToSameKey) {
do {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
// We must have at most one file per level except for level-0,
// which may have up to kL0_StopWritesTrigger files.
const int kMaxFiles =
options.num_levels + options.level0_stop_writes_trigger;
Random rnd(301);
std::string value =
RandomString(&rnd, static_cast<int>(2 * options.write_buffer_size));
for (int i = 0; i < 5 * kMaxFiles; i++) {
ASSERT_OK(Put(1, "key", value));
ASSERT_LE(TotalTableFiles(1), kMaxFiles);
}
} while (ChangeCompactOptions());
}
TEST_F(DBTest, SparseMerge) {
do {
Options options = CurrentOptions();
options.compression = kNoCompression;
CreateAndReopenWithCF({"pikachu"}, options);
FillLevels("A", "Z", 1);
// Suppose there is:
// small amount of data with prefix A
// large amount of data with prefix B
// small amount of data with prefix C
// and that recent updates have made small changes to all three prefixes.
// Check that we do not do a compaction that merges all of B in one shot.
const std::string value(1000, 'x');
Put(1, "A", "va");
// Write approximately 100MB of "B" values
for (int i = 0; i < 100000; i++) {
char key[100];
snprintf(key, sizeof(key), "B%010d", i);
Put(1, key, value);
}
Put(1, "C", "vc");
ASSERT_OK(Flush(1));
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1]);
// Make sparse update
Put(1, "A", "va2");
Put(1, "B100", "bvalue2");
Put(1, "C", "vc2");
ASSERT_OK(Flush(1));
// Compactions should not cause us to create a situation where
// a file overlaps too much data at the next level.
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(handles_[1]),
20 * 1048576);
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(handles_[1]),
20 * 1048576);
dbfull()->TEST_CompactRange(1, nullptr, nullptr);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(handles_[1]),
20 * 1048576);
} while (ChangeCompactOptions());
}
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val),
(unsigned long long)(low),
(unsigned long long)(high));
}
return result;
}
TEST_F(DBTest, ApproximateSizesMemTable) {
Options options;
options.write_buffer_size = 100000000; // Large write buffer
options.compression = kNoCompression;
options.create_if_missing = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
const int N = 128;
Random rnd(301);
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
}
uint64_t size;
std::string start = Key(50);
std::string end = Key(60);
Range r(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_GT(size, 6000);
ASSERT_LT(size, 204800);
// Zero if not including mem table
db_->GetApproximateSizes(&r, 1, &size, false);
ASSERT_EQ(size, 0);
start = Key(500);
end = Key(600);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_EQ(size, 0);
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(Key(1000 + i), RandomString(&rnd, 1024)));
}
start = Key(500);
end = Key(600);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_EQ(size, 0);
start = Key(100);
end = Key(1020);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_GT(size, 6000);
options.max_write_buffer_number = 8;
options.min_write_buffer_number_to_merge = 5;
options.write_buffer_size = 1024 * N; // Not very large
DestroyAndReopen(options);
int keys[N * 3];
for (int i = 0; i < N; i++) {
keys[i * 3] = i * 5;
keys[i * 3 + 1] = i * 5 + 1;
keys[i * 3 + 2] = i * 5 + 2;
}
std::random_shuffle(std::begin(keys), std::end(keys));
for (int i = 0; i < N * 3; i++) {
ASSERT_OK(Put(Key(keys[i] + 1000), RandomString(&rnd, 1024)));
}
start = Key(100);
end = Key(300);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_EQ(size, 0);
start = Key(1050);
end = Key(1080);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_GT(size, 6000);
start = Key(2100);
end = Key(2300);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size, true);
ASSERT_EQ(size, 0);
start = Key(1050);
end = Key(1080);
r = Range(start, end);
uint64_t size_with_mt, size_without_mt;
db_->GetApproximateSizes(&r, 1, &size_with_mt, true);
ASSERT_GT(size_with_mt, 6000);
db_->GetApproximateSizes(&r, 1, &size_without_mt, false);
ASSERT_EQ(size_without_mt, 0);
Flush();
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(Key(i + 1000), RandomString(&rnd, 1024)));
}
start = Key(1050);
end = Key(1080);
r = Range(start, end);
db_->GetApproximateSizes(&r, 1, &size_with_mt, true);
db_->GetApproximateSizes(&r, 1, &size_without_mt, false);
ASSERT_GT(size_with_mt, size_without_mt);
ASSERT_GT(size_without_mt, 6000);
}
TEST_F(DBTest, ApproximateSizes) {
do {
Options options;
options.write_buffer_size = 100000000; // Large write buffer
options.compression = kNoCompression;
options.create_if_missing = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_TRUE(Between(Size("", "xyz", 1), 0, 0));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(Between(Size("", "xyz", 1), 0, 0));
// Write 8MB (80 values, each 100K)
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
const int N = 80;
static const int S1 = 100000;
static const int S2 = 105000; // Allow some expansion from metadata
Random rnd(301);
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(1, Key(i), RandomString(&rnd, S1)));
}
// 0 because GetApproximateSizes() does not account for memtable space
ASSERT_TRUE(Between(Size("", Key(50), 1), 0, 0));
// Check sizes across recovery by reopening a few times
for (int run = 0; run < 3; run++) {
ReopenWithColumnFamilies({"default", "pikachu"}, options);
for (int compact_start = 0; compact_start < N; compact_start += 10) {
for (int i = 0; i < N; i += 10) {
ASSERT_TRUE(Between(Size("", Key(i), 1), S1 * i, S2 * i));
ASSERT_TRUE(Between(Size("", Key(i) + ".suffix", 1), S1 * (i + 1),
S2 * (i + 1)));
ASSERT_TRUE(Between(Size(Key(i), Key(i + 10), 1), S1 * 10, S2 * 10));
}
ASSERT_TRUE(Between(Size("", Key(50), 1), S1 * 50, S2 * 50));
ASSERT_TRUE(
Between(Size("", Key(50) + ".suffix", 1), S1 * 50, S2 * 50));
std::string cstart_str = Key(compact_start);
std::string cend_str = Key(compact_start + 9);
Slice cstart = cstart_str;
Slice cend = cend_str;
dbfull()->TEST_CompactRange(0, &cstart, &cend, handles_[1]);
}
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
ASSERT_GT(NumTableFilesAtLevel(1, 1), 0);
}
// ApproximateOffsetOf() is not yet implemented in plain table format.
} while (ChangeOptions(kSkipUniversalCompaction | kSkipFIFOCompaction |
kSkipPlainTable | kSkipHashIndex));
}
TEST_F(DBTest, ApproximateSizes_MixOfSmallAndLarge) {
do {
Options options = CurrentOptions();
options.compression = kNoCompression;
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
std::string big1 = RandomString(&rnd, 100000);
ASSERT_OK(Put(1, Key(0), RandomString(&rnd, 10000)));
ASSERT_OK(Put(1, Key(1), RandomString(&rnd, 10000)));
ASSERT_OK(Put(1, Key(2), big1));
ASSERT_OK(Put(1, Key(3), RandomString(&rnd, 10000)));
ASSERT_OK(Put(1, Key(4), big1));
ASSERT_OK(Put(1, Key(5), RandomString(&rnd, 10000)));
ASSERT_OK(Put(1, Key(6), RandomString(&rnd, 300000)));
ASSERT_OK(Put(1, Key(7), RandomString(&rnd, 10000)));
// Check sizes across recovery by reopening a few times
for (int run = 0; run < 3; run++) {
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(Between(Size("", Key(0), 1), 0, 0));
ASSERT_TRUE(Between(Size("", Key(1), 1), 10000, 11000));
ASSERT_TRUE(Between(Size("", Key(2), 1), 20000, 21000));
ASSERT_TRUE(Between(Size("", Key(3), 1), 120000, 121000));
ASSERT_TRUE(Between(Size("", Key(4), 1), 130000, 131000));
ASSERT_TRUE(Between(Size("", Key(5), 1), 230000, 231000));
ASSERT_TRUE(Between(Size("", Key(6), 1), 240000, 241000));
ASSERT_TRUE(Between(Size("", Key(7), 1), 540000, 541000));
ASSERT_TRUE(Between(Size("", Key(8), 1), 550000, 560000));
ASSERT_TRUE(Between(Size(Key(3), Key(5), 1), 110000, 111000));
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1]);
}
// ApproximateOffsetOf() is not yet implemented in plain table format.
} while (ChangeOptions(kSkipPlainTable));
}
TEST_F(DBTest, IteratorPinsRef) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
Put(1, "foo", "hello");
// Get iterator that will yield the current contents of the DB.
Iterator* iter = db_->NewIterator(ReadOptions(), handles_[1]);
// Write to force compactions
Put(1, "foo", "newvalue1");
for (int i = 0; i < 100; i++) {
// 100K values
ASSERT_OK(Put(1, Key(i), Key(i) + std::string(100000, 'v')));
}
Put(1, "foo", "newvalue2");
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("foo", iter->key().ToString());
ASSERT_EQ("hello", iter->value().ToString());
iter->Next();
ASSERT_TRUE(!iter->Valid());
delete iter;
} while (ChangeCompactOptions());
}
TEST_F(DBTest, Snapshot) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions(options_override));
Put(0, "foo", "0v1");
Put(1, "foo", "1v1");
const Snapshot* s1 = db_->GetSnapshot();
ASSERT_EQ(1U, GetNumSnapshots());
uint64_t time_snap1 = GetTimeOldestSnapshots();
ASSERT_GT(time_snap1, 0U);
Put(0, "foo", "0v2");
Put(1, "foo", "1v2");
env_->addon_time_.fetch_add(1);
const Snapshot* s2 = db_->GetSnapshot();
ASSERT_EQ(2U, GetNumSnapshots());
ASSERT_EQ(time_snap1, GetTimeOldestSnapshots());
Put(0, "foo", "0v3");
Put(1, "foo", "1v3");
{
ManagedSnapshot s3(db_);
ASSERT_EQ(3U, GetNumSnapshots());
ASSERT_EQ(time_snap1, GetTimeOldestSnapshots());
Put(0, "foo", "0v4");
Put(1, "foo", "1v4");
ASSERT_EQ("0v1", Get(0, "foo", s1));
ASSERT_EQ("1v1", Get(1, "foo", s1));
ASSERT_EQ("0v2", Get(0, "foo", s2));
ASSERT_EQ("1v2", Get(1, "foo", s2));
ASSERT_EQ("0v3", Get(0, "foo", s3.snapshot()));
ASSERT_EQ("1v3", Get(1, "foo", s3.snapshot()));
ASSERT_EQ("0v4", Get(0, "foo"));
ASSERT_EQ("1v4", Get(1, "foo"));
}
ASSERT_EQ(2U, GetNumSnapshots());
ASSERT_EQ(time_snap1, GetTimeOldestSnapshots());
ASSERT_EQ("0v1", Get(0, "foo", s1));
ASSERT_EQ("1v1", Get(1, "foo", s1));
ASSERT_EQ("0v2", Get(0, "foo", s2));
ASSERT_EQ("1v2", Get(1, "foo", s2));
ASSERT_EQ("0v4", Get(0, "foo"));
ASSERT_EQ("1v4", Get(1, "foo"));
db_->ReleaseSnapshot(s1);
ASSERT_EQ("0v2", Get(0, "foo", s2));
ASSERT_EQ("1v2", Get(1, "foo", s2));
ASSERT_EQ("0v4", Get(0, "foo"));
ASSERT_EQ("1v4", Get(1, "foo"));
ASSERT_EQ(1U, GetNumSnapshots());
ASSERT_LT(time_snap1, GetTimeOldestSnapshots());
db_->ReleaseSnapshot(s2);
ASSERT_EQ(0U, GetNumSnapshots());
ASSERT_EQ("0v4", Get(0, "foo"));
ASSERT_EQ("1v4", Get(1, "foo"));
} while (ChangeOptions(kSkipHashCuckoo));
}
TEST_F(DBTest, HiddenValuesAreRemoved) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
Options options = CurrentOptions(options_override);
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
FillLevels("a", "z", 1);
std::string big = RandomString(&rnd, 50000);
Put(1, "foo", big);
Put(1, "pastfoo", "v");
const Snapshot* snapshot = db_->GetSnapshot();
Put(1, "foo", "tiny");
Put(1, "pastfoo2", "v2"); // Advance sequence number one more
ASSERT_OK(Flush(1));
ASSERT_GT(NumTableFilesAtLevel(0, 1), 0);
ASSERT_EQ(big, Get(1, "foo", snapshot));
ASSERT_TRUE(Between(Size("", "pastfoo", 1), 50000, 60000));
db_->ReleaseSnapshot(snapshot);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ tiny, " + big + " ]");
Slice x("x");
dbfull()->TEST_CompactRange(0, nullptr, &x, handles_[1]);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ tiny ]");
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
ASSERT_GE(NumTableFilesAtLevel(1, 1), 1);
dbfull()->TEST_CompactRange(1, nullptr, &x, handles_[1]);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ tiny ]");
ASSERT_TRUE(Between(Size("", "pastfoo", 1), 0, 1000));
// ApproximateOffsetOf() is not yet implemented in plain table format,
// which is used by Size().
// skip HashCuckooRep as it does not support snapshot
} while (ChangeOptions(kSkipUniversalCompaction | kSkipFIFOCompaction |
kSkipPlainTable | kSkipHashCuckoo));
}
TEST_F(DBTest, CompactBetweenSnapshots) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
Options options = CurrentOptions(options_override);
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
FillLevels("a", "z", 1);
Put(1, "foo", "first");
const Snapshot* snapshot1 = db_->GetSnapshot();
Put(1, "foo", "second");
Put(1, "foo", "third");
Put(1, "foo", "fourth");
const Snapshot* snapshot2 = db_->GetSnapshot();
Put(1, "foo", "fifth");
Put(1, "foo", "sixth");
// All entries (including duplicates) exist
// before any compaction or flush is triggered.
ASSERT_EQ(AllEntriesFor("foo", 1),
"[ sixth, fifth, fourth, third, second, first ]");
ASSERT_EQ("sixth", Get(1, "foo"));
ASSERT_EQ("fourth", Get(1, "foo", snapshot2));
ASSERT_EQ("first", Get(1, "foo", snapshot1));
// After a flush, "second", "third" and "fifth" should
// be removed
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ sixth, fourth, first ]");
// after we release the snapshot1, only two values left
db_->ReleaseSnapshot(snapshot1);
FillLevels("a", "z", 1);
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
// We have only one valid snapshot snapshot2. Since snapshot1 is
// not valid anymore, "first" should be removed by a compaction.
ASSERT_EQ("sixth", Get(1, "foo"));
ASSERT_EQ("fourth", Get(1, "foo", snapshot2));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ sixth, fourth ]");
// after we release the snapshot2, only one value should be left
db_->ReleaseSnapshot(snapshot2);
FillLevels("a", "z", 1);
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ("sixth", Get(1, "foo"));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ sixth ]");
// skip HashCuckooRep as it does not support snapshot
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction));
}
TEST_F(DBTest, UnremovableSingleDelete) {
// If we compact:
//
// Put(A, v1) Snapshot SingleDelete(A) Put(A, v2)
//
// We do not want to end up with:
//
// Put(A, v1) Snapshot Put(A, v2)
//
// Because a subsequent SingleDelete(A) would delete the Put(A, v2)
// but not Put(A, v1), so Get(A) would return v1.
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
Options options = CurrentOptions(options_override);
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "foo", "first");
const Snapshot* snapshot = db_->GetSnapshot();
SingleDelete(1, "foo");
Put(1, "foo", "second");
ASSERT_OK(Flush(1));
ASSERT_EQ("first", Get(1, "foo", snapshot));
ASSERT_EQ("second", Get(1, "foo"));
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ("[ second, SDEL, first ]", AllEntriesFor("foo", 1));
SingleDelete(1, "foo");
ASSERT_EQ("first", Get(1, "foo", snapshot));
ASSERT_EQ("NOT_FOUND", Get(1, "foo"));
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ("first", Get(1, "foo", snapshot));
ASSERT_EQ("NOT_FOUND", Get(1, "foo"));
// Skip HashCuckooRep as it does not support single delete. FIFO and
// universal compaction do not apply to the test case. Skip MergePut
// because single delete does not get removed when it encounters a merge.
} while (ChangeOptions(kSkipHashCuckoo | kSkipFIFOCompaction |
kSkipUniversalCompaction | kSkipMergePut));
}
TEST_F(DBTest, DeletionMarkers1) {
Options options = CurrentOptions();
options.max_background_flushes = 0;
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "foo", "v1");
ASSERT_OK(Flush(1));
const int last = 2;
MoveFilesToLevel(last, 1);
// foo => v1 is now in last level
ASSERT_EQ(NumTableFilesAtLevel(last, 1), 1);
// Place a table at level last-1 to prevent merging with preceding mutation
Put(1, "a", "begin");
Put(1, "z", "end");
Flush(1);
MoveFilesToLevel(last - 1, 1);
ASSERT_EQ(NumTableFilesAtLevel(last, 1), 1);
ASSERT_EQ(NumTableFilesAtLevel(last - 1, 1), 1);
Delete(1, "foo");
Put(1, "foo", "v2");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2, DEL, v1 ]");
ASSERT_OK(Flush(1)); // Moves to level last-2
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2, v1 ]");
Slice z("z");
dbfull()->TEST_CompactRange(last - 2, nullptr, &z, handles_[1]);
// DEL eliminated, but v1 remains because we aren't compacting that level
// (DEL can be eliminated because v2 hides v1).
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2, v1 ]");
dbfull()->TEST_CompactRange(last - 1, nullptr, nullptr, handles_[1]);
// Merging last-1 w/ last, so we are the base level for "foo", so
// DEL is removed. (as is v1).
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2 ]");
}
TEST_F(DBTest, DeletionMarkers2) {
Options options = CurrentOptions();
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "foo", "v1");
ASSERT_OK(Flush(1));
const int last = 2;
MoveFilesToLevel(last, 1);
// foo => v1 is now in last level
ASSERT_EQ(NumTableFilesAtLevel(last, 1), 1);
// Place a table at level last-1 to prevent merging with preceding mutation
Put(1, "a", "begin");
Put(1, "z", "end");
Flush(1);
MoveFilesToLevel(last - 1, 1);
ASSERT_EQ(NumTableFilesAtLevel(last, 1), 1);
ASSERT_EQ(NumTableFilesAtLevel(last - 1, 1), 1);
Delete(1, "foo");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, v1 ]");
ASSERT_OK(Flush(1)); // Moves to level last-2
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, v1 ]");
dbfull()->TEST_CompactRange(last - 2, nullptr, nullptr, handles_[1]);
// DEL kept: "last" file overlaps
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, v1 ]");
dbfull()->TEST_CompactRange(last - 1, nullptr, nullptr, handles_[1]);
// Merging last-1 w/ last, so we are the base level for "foo", so
// DEL is removed. (as is v1).
ASSERT_EQ(AllEntriesFor("foo", 1), "[ ]");
}
TEST_F(DBTest, OverlapInLevel0) {
do {
Options options = CurrentOptions();
CreateAndReopenWithCF({"pikachu"}, options);
//Fill levels 1 and 2 to disable the pushing of new memtables to levels > 0.
ASSERT_OK(Put(1, "100", "v100"));
ASSERT_OK(Put(1, "999", "v999"));
Flush(1);
MoveFilesToLevel(2, 1);
ASSERT_OK(Delete(1, "100"));
ASSERT_OK(Delete(1, "999"));
Flush(1);
MoveFilesToLevel(1, 1);
ASSERT_EQ("0,1,1", FilesPerLevel(1));
// Make files spanning the following ranges in level-0:
// files[0] 200 .. 900
// files[1] 300 .. 500
// Note that files are sorted by smallest key.
ASSERT_OK(Put(1, "300", "v300"));
ASSERT_OK(Put(1, "500", "v500"));
Flush(1);
ASSERT_OK(Put(1, "200", "v200"));
ASSERT_OK(Put(1, "600", "v600"));
ASSERT_OK(Put(1, "900", "v900"));
Flush(1);
ASSERT_EQ("2,1,1", FilesPerLevel(1));
// Compact away the placeholder files we created initially
dbfull()->TEST_CompactRange(1, nullptr, nullptr, handles_[1]);
dbfull()->TEST_CompactRange(2, nullptr, nullptr, handles_[1]);
ASSERT_EQ("2", FilesPerLevel(1));
// Do a memtable compaction. Before bug-fix, the compaction would
// not detect the overlap with level-0 files and would incorrectly place
// the deletion in a deeper level.
ASSERT_OK(Delete(1, "600"));
Flush(1);
ASSERT_EQ("3", FilesPerLevel(1));
ASSERT_EQ("NOT_FOUND", Get(1, "600"));
} while (ChangeOptions(kSkipUniversalCompaction | kSkipFIFOCompaction));
}
TEST_F(DBTest, ComparatorCheck) {
class NewComparator : public Comparator {
public:
virtual const char* Name() const override {
return "rocksdb.NewComparator";
}
virtual int Compare(const Slice& a, const Slice& b) const override {
return BytewiseComparator()->Compare(a, b);
}
virtual void FindShortestSeparator(std::string* s,
const Slice& l) const override {
BytewiseComparator()->FindShortestSeparator(s, l);
}
virtual void FindShortSuccessor(std::string* key) const override {
BytewiseComparator()->FindShortSuccessor(key);
}
};
Options new_options, options;
NewComparator cmp;
do {
options = CurrentOptions();
CreateAndReopenWithCF({"pikachu"}, options);
new_options = CurrentOptions();
new_options.comparator = &cmp;
// only the non-default column family has non-matching comparator
Status s = TryReopenWithColumnFamilies({"default", "pikachu"},
std::vector<Options>({options, new_options}));
ASSERT_TRUE(!s.ok());
ASSERT_TRUE(s.ToString().find("comparator") != std::string::npos)
<< s.ToString();
} while (ChangeCompactOptions());
}
TEST_F(DBTest, CustomComparator) {
class NumberComparator : public Comparator {
public:
virtual const char* Name() const override {
return "test.NumberComparator";
}
virtual int Compare(const Slice& a, const Slice& b) const override {
return ToNumber(a) - ToNumber(b);
}
virtual void FindShortestSeparator(std::string* s,
const Slice& l) const override {
ToNumber(*s); // Check format
ToNumber(l); // Check format
}
virtual void FindShortSuccessor(std::string* key) const override {
ToNumber(*key); // Check format
}
private:
static int ToNumber(const Slice& x) {
// Check that there are no extra characters.
EXPECT_TRUE(x.size() >= 2 && x[0] == '[' && x[x.size() - 1] == ']')
<< EscapeString(x);
int val;
char ignored;
EXPECT_TRUE(sscanf(x.ToString().c_str(), "[%i]%c", &val, &ignored) == 1)
<< EscapeString(x);
return val;
}
};
Options new_options;
NumberComparator cmp;
do {
new_options = CurrentOptions();
new_options.create_if_missing = true;
new_options.comparator = &cmp;
new_options.write_buffer_size = 4096; // Compact more often
new_options.arena_block_size = 4096;
new_options = CurrentOptions(new_options);
DestroyAndReopen(new_options);
CreateAndReopenWithCF({"pikachu"}, new_options);
ASSERT_OK(Put(1, "[10]", "ten"));
ASSERT_OK(Put(1, "[0x14]", "twenty"));
for (int i = 0; i < 2; i++) {
ASSERT_EQ("ten", Get(1, "[10]"));
ASSERT_EQ("ten", Get(1, "[0xa]"));
ASSERT_EQ("twenty", Get(1, "[20]"));
ASSERT_EQ("twenty", Get(1, "[0x14]"));
ASSERT_EQ("NOT_FOUND", Get(1, "[15]"));
ASSERT_EQ("NOT_FOUND", Get(1, "[0xf]"));
Compact(1, "[0]", "[9999]");
}
for (int run = 0; run < 2; run++) {
for (int i = 0; i < 1000; i++) {
char buf[100];
snprintf(buf, sizeof(buf), "[%d]", i*10);
ASSERT_OK(Put(1, buf, buf));
}
Compact(1, "[0]", "[1000000]");
}
} while (ChangeCompactOptions());
}
TEST_F(DBTest, DBOpen_Options) {
Options options = CurrentOptions();
std::string dbname = test::TmpDir(env_) + "/db_options_test";
ASSERT_OK(DestroyDB(dbname, options));
// Does not exist, and create_if_missing == false: error
DB* db = nullptr;
options.create_if_missing = false;
Status s = DB::Open(options, dbname, &db);
ASSERT_TRUE(strstr(s.ToString().c_str(), "does not exist") != nullptr);
ASSERT_TRUE(db == nullptr);
// Does not exist, and create_if_missing == true: OK
options.create_if_missing = true;
s = DB::Open(options, dbname, &db);
ASSERT_OK(s);
ASSERT_TRUE(db != nullptr);
delete db;
db = nullptr;
// Does exist, and error_if_exists == true: error
options.create_if_missing = false;
options.error_if_exists = true;
s = DB::Open(options, dbname, &db);
ASSERT_TRUE(strstr(s.ToString().c_str(), "exists") != nullptr);
ASSERT_TRUE(db == nullptr);
// Does exist, and error_if_exists == false: OK
options.create_if_missing = true;
options.error_if_exists = false;
s = DB::Open(options, dbname, &db);
ASSERT_OK(s);
ASSERT_TRUE(db != nullptr);
delete db;
db = nullptr;
}
TEST_F(DBTest, DBOpen_Change_NumLevels) {
Options options = CurrentOptions();
options.create_if_missing = true;
DestroyAndReopen(options);
ASSERT_TRUE(db_ != nullptr);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "a", "123"));
ASSERT_OK(Put(1, "b", "234"));
Flush(1);
MoveFilesToLevel(3, 1);
Close();
options.create_if_missing = false;
options.num_levels = 2;
Status s = TryReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(strstr(s.ToString().c_str(), "Invalid argument") != nullptr);
ASSERT_TRUE(db_ == nullptr);
}
TEST_F(DBTest, DestroyDBMetaDatabase) {
std::string dbname = test::TmpDir(env_) + "/db_meta";
ASSERT_OK(env_->CreateDirIfMissing(dbname));
std::string metadbname = MetaDatabaseName(dbname, 0);
ASSERT_OK(env_->CreateDirIfMissing(metadbname));
std::string metametadbname = MetaDatabaseName(metadbname, 0);
ASSERT_OK(env_->CreateDirIfMissing(metametadbname));
// Destroy previous versions if they exist. Using the long way.
Options options = CurrentOptions();
ASSERT_OK(DestroyDB(metametadbname, options));
ASSERT_OK(DestroyDB(metadbname, options));
ASSERT_OK(DestroyDB(dbname, options));
// Setup databases
DB* db = nullptr;
ASSERT_OK(DB::Open(options, dbname, &db));
delete db;
db = nullptr;
ASSERT_OK(DB::Open(options, metadbname, &db));
delete db;
db = nullptr;
ASSERT_OK(DB::Open(options, metametadbname, &db));
delete db;
db = nullptr;
// Delete databases
ASSERT_OK(DestroyDB(dbname, options));
// Check if deletion worked.
options.create_if_missing = false;
ASSERT_TRUE(!(DB::Open(options, dbname, &db)).ok());
ASSERT_TRUE(!(DB::Open(options, metadbname, &db)).ok());
ASSERT_TRUE(!(DB::Open(options, metametadbname, &db)).ok());
}
// Check that number of files does not grow when writes are dropped
TEST_F(DBTest, DropWrites) {
do {
Options options = CurrentOptions();
options.env = env_;
options.paranoid_checks = false;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
Compact("a", "z");
const size_t num_files = CountFiles();
// Force out-of-space errors
env_->drop_writes_.store(true, std::memory_order_release);
env_->sleep_counter_.Reset();
env_->no_sleep_ = true;
for (int i = 0; i < 5; i++) {
if (option_config_ != kUniversalCompactionMultiLevel &&
option_config_ != kUniversalSubcompactions) {
for (int level = 0; level < dbfull()->NumberLevels(); level++) {
if (level > 0 && level == dbfull()->NumberLevels() - 1) {
break;
}
dbfull()->TEST_CompactRange(level, nullptr, nullptr, nullptr,
true /* disallow trivial move */);
}
} else {
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
}
}
std::string property_value;
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("5", property_value);
env_->drop_writes_.store(false, std::memory_order_release);
ASSERT_LT(CountFiles(), num_files + 3);
// Check that compaction attempts slept after errors
// TODO @krad: Figure out why ASSERT_EQ 5 keeps failing in certain compiler
// versions
ASSERT_GE(env_->sleep_counter_.Read(), 4);
} while (ChangeCompactOptions());
}
// Check background error counter bumped on flush failures.
TEST_F(DBTest, DropWritesFlush) {
do {
Options options = CurrentOptions();
options.env = env_;
options.max_background_flushes = 1;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
// Force out-of-space errors
env_->drop_writes_.store(true, std::memory_order_release);
std::string property_value;
// Background error count is 0 now.
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("0", property_value);
dbfull()->TEST_FlushMemTable(true);
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("1", property_value);
env_->drop_writes_.store(false, std::memory_order_release);
} while (ChangeCompactOptions());
}
// Check that CompactRange() returns failure if there is not enough space left
// on device
TEST_F(DBTest, NoSpaceCompactRange) {
do {
Options options = CurrentOptions();
options.env = env_;
options.disable_auto_compactions = true;
Reopen(options);
// generate 5 tables
for (int i = 0; i < 5; ++i) {
ASSERT_OK(Put(Key(i), Key(i) + "v"));
ASSERT_OK(Flush());
}
// Force out-of-space errors
env_->no_space_.store(true, std::memory_order_release);
Status s = dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
true /* disallow trivial move */);
ASSERT_TRUE(s.IsIOError());
env_->no_space_.store(false, std::memory_order_release);
} while (ChangeCompactOptions());
}
TEST_F(DBTest, NonWritableFileSystem) {
do {
Options options = CurrentOptions();
options.write_buffer_size = 4096;
options.arena_block_size = 4096;
options.env = env_;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
env_->non_writeable_rate_.store(100);
std::string big(100000, 'x');
int errors = 0;
for (int i = 0; i < 20; i++) {
if (!Put("foo", big).ok()) {
errors++;
env_->SleepForMicroseconds(100000);
}
}
ASSERT_GT(errors, 0);
env_->non_writeable_rate_.store(0);
} while (ChangeCompactOptions());
}
TEST_F(DBTest, ManifestWriteError) {
// Test for the following problem:
// (a) Compaction produces file F
// (b) Log record containing F is written to MANIFEST file, but Sync() fails
// (c) GC deletes F
// (d) After reopening DB, reads fail since deleted F is named in log record
// We iterate twice. In the second iteration, everything is the
// same except the log record never makes it to the MANIFEST file.
for (int iter = 0; iter < 2; iter++) {
std::atomic<bool>* error_type = (iter == 0)
? &env_->manifest_sync_error_
: &env_->manifest_write_error_;
// Insert foo=>bar mapping
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
DestroyAndReopen(options);
ASSERT_OK(Put("foo", "bar"));
ASSERT_EQ("bar", Get("foo"));
// Memtable compaction (will succeed)
Flush();
ASSERT_EQ("bar", Get("foo"));
const int last = 2;
MoveFilesToLevel(2);
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo=>bar is now in last level
// Merging compaction (will fail)
error_type->store(true, std::memory_order_release);
dbfull()->TEST_CompactRange(last, nullptr, nullptr); // Should fail
ASSERT_EQ("bar", Get("foo"));
// Recovery: should not lose data
error_type->store(false, std::memory_order_release);
Reopen(options);
ASSERT_EQ("bar", Get("foo"));
}
}
TEST_F(DBTest, PutFailsParanoid) {
// Test the following:
// (a) A random put fails in paranoid mode (simulate by sync fail)
// (b) All other puts have to fail, even if writes would succeed
// (c) All of that should happen ONLY if paranoid_checks = true
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
Status s;
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
// simulate error
env_->log_write_error_.store(true, std::memory_order_release);
s = Put(1, "foo2", "bar2");
ASSERT_TRUE(!s.ok());
env_->log_write_error_.store(false, std::memory_order_release);
s = Put(1, "foo3", "bar3");
// the next put should fail, too
ASSERT_TRUE(!s.ok());
// but we're still able to read
ASSERT_EQ("bar", Get(1, "foo"));
// do the same thing with paranoid checks off
options.paranoid_checks = false;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
// simulate error
env_->log_write_error_.store(true, std::memory_order_release);
s = Put(1, "foo2", "bar2");
ASSERT_TRUE(!s.ok());
env_->log_write_error_.store(false, std::memory_order_release);
s = Put(1, "foo3", "bar3");
// the next put should NOT fail
ASSERT_TRUE(s.ok());
}
TEST_F(DBTest, BloomFilter) {
do {
Options options = CurrentOptions();
env_->count_random_reads_ = true;
options.env = env_;
// ChangeCompactOptions() only changes compaction style, which does not
// trigger reset of table_factory
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
CreateAndReopenWithCF({"pikachu"}, options);
// Populate multiple layers
const int N = 10000;
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
Compact(1, "a", "z");
for (int i = 0; i < N; i += 100) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
Flush(1);
// Prevent auto compactions triggered by seeks
env_->delay_sstable_sync_.store(true, std::memory_order_release);
// Lookup present keys. Should rarely read from small sstable.
env_->random_read_counter_.Reset();
for (int i = 0; i < N; i++) {
ASSERT_EQ(Key(i), Get(1, Key(i)));
}
int reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d present => %d reads\n", N, reads);
ASSERT_GE(reads, N);
ASSERT_LE(reads, N + 2*N/100);
// Lookup present keys. Should rarely read from either sstable.
env_->random_read_counter_.Reset();
for (int i = 0; i < N; i++) {
ASSERT_EQ("NOT_FOUND", Get(1, Key(i) + ".missing"));
}
reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d missing => %d reads\n", N, reads);
ASSERT_LE(reads, 3*N/100);
env_->delay_sstable_sync_.store(false, std::memory_order_release);
Close();
} while (ChangeCompactOptions());
}
TEST_F(DBTest, BloomFilterRate) {
while (ChangeFilterOptions()) {
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
CreateAndReopenWithCF({"pikachu"}, options);
const int maxKey = 10000;
for (int i = 0; i < maxKey; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
// Add a large key to make the file contain wide range
ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
Flush(1);
// Check if they can be found
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ(Key(i), Get(1, Key(i)));
}
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
// Check if filter is useful
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ("NOT_FOUND", Get(1, Key(i+33333)));
}
ASSERT_GE(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), maxKey*0.98);
}
}
TEST_F(DBTest, BloomFilterCompatibility) {
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
// Create with block based filter
CreateAndReopenWithCF({"pikachu"}, options);
const int maxKey = 10000;
for (int i = 0; i < maxKey; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
Flush(1);
// Check db with full filter
table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// Check if they can be found
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ(Key(i), Get(1, Key(i)));
}
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
}
TEST_F(DBTest, BloomFilterReverseCompatibility) {
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
// Create with full filter
CreateAndReopenWithCF({"pikachu"}, options);
const int maxKey = 10000;
for (int i = 0; i < maxKey; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
Flush(1);
// Check db with block_based filter
table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// Check if they can be found
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ(Key(i), Get(1, Key(i)));
}
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
}
namespace {
// A wrapped bloom over default FilterPolicy
class WrappedBloom : public FilterPolicy {
public:
explicit WrappedBloom(int bits_per_key) :
filter_(NewBloomFilterPolicy(bits_per_key)),
counter_(0) {}
~WrappedBloom() { delete filter_; }
const char* Name() const override { return "WrappedRocksDbFilterPolicy"; }
void CreateFilter(const rocksdb::Slice* keys, int n, std::string* dst)
const override {
std::unique_ptr<rocksdb::Slice[]> user_keys(new rocksdb::Slice[n]);
for (int i = 0; i < n; ++i) {
user_keys[i] = convertKey(keys[i]);
}
return filter_->CreateFilter(user_keys.get(), n, dst);
}
bool KeyMayMatch(const rocksdb::Slice& key, const rocksdb::Slice& filter)
const override {
counter_++;
return filter_->KeyMayMatch(convertKey(key), filter);
}
uint32_t GetCounter() { return counter_; }
private:
const FilterPolicy* filter_;
mutable uint32_t counter_;
rocksdb::Slice convertKey(const rocksdb::Slice& key) const {
return key;
}
};
} // namespace
TEST_F(DBTest, BloomFilterWrapper) {
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
BlockBasedTableOptions table_options;
WrappedBloom* policy = new WrappedBloom(10);
table_options.filter_policy.reset(policy);
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
CreateAndReopenWithCF({"pikachu"}, options);
const int maxKey = 10000;
for (int i = 0; i < maxKey; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
// Add a large key to make the file contain wide range
ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
ASSERT_EQ(0U, policy->GetCounter());
Flush(1);
// Check if they can be found
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ(Key(i), Get(1, Key(i)));
}
ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
ASSERT_EQ(1U * maxKey, policy->GetCounter());
// Check if filter is useful
for (int i = 0; i < maxKey; i++) {
ASSERT_EQ("NOT_FOUND", Get(1, Key(i+33333)));
}
ASSERT_GE(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), maxKey*0.98);
ASSERT_EQ(2U * maxKey, policy->GetCounter());
}
TEST_F(DBTest, SnapshotFiles) {
do {
Options options = CurrentOptions();
options.write_buffer_size = 100000000; // Large write buffer
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
// Write 8MB (80 values, each 100K)
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
std::vector<std::string> values;
for (int i = 0; i < 80; i++) {
values.push_back(RandomString(&rnd, 100000));
ASSERT_OK(Put((i < 40), Key(i), values[i]));
}
// assert that nothing makes it to disk yet.
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
// get a file snapshot
uint64_t manifest_number = 0;
uint64_t manifest_size = 0;
std::vector<std::string> files;
dbfull()->DisableFileDeletions();
dbfull()->GetLiveFiles(files, &manifest_size);
// CURRENT, MANIFEST, *.sst files (one for each CF)
ASSERT_EQ(files.size(), 4U);
uint64_t number = 0;
FileType type;
// copy these files to a new snapshot directory
std::string snapdir = dbname_ + ".snapdir/";
ASSERT_OK(env_->CreateDirIfMissing(snapdir));
for (unsigned int i = 0; i < files.size(); i++) {
// our clients require that GetLiveFiles returns
// files with "/" as first character!
ASSERT_EQ(files[i][0], '/');
std::string src = dbname_ + files[i];
std::string dest = snapdir + files[i];
uint64_t size;
ASSERT_OK(env_->GetFileSize(src, &size));
// record the number and the size of the
// latest manifest file
if (ParseFileName(files[i].substr(1), &number, &type)) {
if (type == kDescriptorFile) {
if (number > manifest_number) {
manifest_number = number;
ASSERT_GE(size, manifest_size);
size = manifest_size; // copy only valid MANIFEST data
}
}
}
CopyFile(src, dest, size);
}
// release file snapshot
dbfull()->DisableFileDeletions();
// overwrite one key, this key should not appear in the snapshot
std::vector<std::string> extras;
for (unsigned int i = 0; i < 1; i++) {
extras.push_back(RandomString(&rnd, 100000));
ASSERT_OK(Put(0, Key(i), extras[i]));
}
// verify that data in the snapshot are correct
std::vector<ColumnFamilyDescriptor> column_families;
column_families.emplace_back("default", ColumnFamilyOptions());
column_families.emplace_back("pikachu", ColumnFamilyOptions());
std::vector<ColumnFamilyHandle*> cf_handles;
DB* snapdb;
DBOptions opts;
opts.env = env_;
opts.create_if_missing = false;
Status stat =
DB::Open(opts, snapdir, column_families, &cf_handles, &snapdb);
ASSERT_OK(stat);
ReadOptions roptions;
std::string val;
for (unsigned int i = 0; i < 80; i++) {
stat = snapdb->Get(roptions, cf_handles[i < 40], Key(i), &val);
ASSERT_EQ(values[i].compare(val), 0);
}
for (auto cfh : cf_handles) {
delete cfh;
}
delete snapdb;
// look at the new live files after we added an 'extra' key
// and after we took the first snapshot.
uint64_t new_manifest_number = 0;
uint64_t new_manifest_size = 0;
std::vector<std::string> newfiles;
dbfull()->DisableFileDeletions();
dbfull()->GetLiveFiles(newfiles, &new_manifest_size);
// find the new manifest file. assert that this manifest file is
// the same one as in the previous snapshot. But its size should be
// larger because we added an extra key after taking the
// previous shapshot.
for (unsigned int i = 0; i < newfiles.size(); i++) {
std::string src = dbname_ + "/" + newfiles[i];
// record the lognumber and the size of the
// latest manifest file
if (ParseFileName(newfiles[i].substr(1), &number, &type)) {
if (type == kDescriptorFile) {
if (number > new_manifest_number) {
uint64_t size;
new_manifest_number = number;
ASSERT_OK(env_->GetFileSize(src, &size));
ASSERT_GE(size, new_manifest_size);
}
}
}
}
ASSERT_EQ(manifest_number, new_manifest_number);
ASSERT_GT(new_manifest_size, manifest_size);
// release file snapshot
dbfull()->DisableFileDeletions();
} while (ChangeCompactOptions());
}
TEST_F(DBTest, CompactOnFlush) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
do {
Options options = CurrentOptions(options_override);
options.disable_auto_compactions = true;
CreateAndReopenWithCF({"pikachu"}, options);
Put(1, "foo", "v1");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v1 ]");
// Write two new keys
Put(1, "a", "begin");
Put(1, "z", "end");
Flush(1);
// Case1: Delete followed by a put
Delete(1, "foo");
Put(1, "foo", "v2");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2, DEL, v1 ]");
// After the current memtable is flushed, the DEL should
// have been removed
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2, v1 ]");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v2 ]");
// Case 2: Delete followed by another delete
Delete(1, "foo");
Delete(1, "foo");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, DEL, v2 ]");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, v2 ]");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ ]");
// Case 3: Put followed by a delete
Put(1, "foo", "v3");
Delete(1, "foo");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL, v3 ]");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ DEL ]");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ ]");
// Case 4: Put followed by another Put
Put(1, "foo", "v4");
Put(1, "foo", "v5");
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v5, v4 ]");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v5 ]");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v5 ]");
// clear database
Delete(1, "foo");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ ]");
// Case 5: Put followed by snapshot followed by another Put
// Both puts should remain.
Put(1, "foo", "v6");
const Snapshot* snapshot = db_->GetSnapshot();
Put(1, "foo", "v7");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v7, v6 ]");
db_->ReleaseSnapshot(snapshot);
// clear database
Delete(1, "foo");
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ(AllEntriesFor("foo", 1), "[ ]");
// Case 5: snapshot followed by a put followed by another Put
// Only the last put should remain.
const Snapshot* snapshot1 = db_->GetSnapshot();
Put(1, "foo", "v8");
Put(1, "foo", "v9");
ASSERT_OK(Flush(1));
ASSERT_EQ(AllEntriesFor("foo", 1), "[ v9 ]");
db_->ReleaseSnapshot(snapshot1);
} while (ChangeCompactOptions());
}
namespace {
std::vector<std::uint64_t> ListSpecificFiles(
Env* env, const std::string& path, const FileType expected_file_type) {
std::vector<std::string> files;
std::vector<uint64_t> file_numbers;
env->GetChildren(path, &files);
uint64_t number;
FileType type;
for (size_t i = 0; i < files.size(); ++i) {
if (ParseFileName(files[i], &number, &type)) {
if (type == expected_file_type) {
file_numbers.push_back(number);
}
}
}
return std::move(file_numbers);
}
std::vector<std::uint64_t> ListTableFiles(Env* env, const std::string& path) {
return ListSpecificFiles(env, path, kTableFile);
}
} // namespace
TEST_F(DBTest, FlushOneColumnFamily) {
Options options = CurrentOptions();
CreateAndReopenWithCF({"pikachu", "ilya", "muromec", "dobrynia", "nikitich",
"alyosha", "popovich"},
options);
ASSERT_OK(Put(0, "Default", "Default"));
ASSERT_OK(Put(1, "pikachu", "pikachu"));
ASSERT_OK(Put(2, "ilya", "ilya"));
ASSERT_OK(Put(3, "muromec", "muromec"));
ASSERT_OK(Put(4, "dobrynia", "dobrynia"));
ASSERT_OK(Put(5, "nikitich", "nikitich"));
ASSERT_OK(Put(6, "alyosha", "alyosha"));
ASSERT_OK(Put(7, "popovich", "popovich"));
for (int i = 0; i < 8; ++i) {
Flush(i);
auto tables = ListTableFiles(env_, dbname_);
ASSERT_EQ(tables.size(), i + 1U);
}
}
// In https://reviews.facebook.net/D20661 we change
// recovery behavior: previously for each log file each column family
// memtable was flushed, even it was empty. Now it's changed:
// we try to create the smallest number of table files by merging
// updates from multiple logs
TEST_F(DBTest, RecoverCheckFileAmountWithSmallWriteBuffer) {
Options options = CurrentOptions();
options.write_buffer_size = 5000000;
CreateAndReopenWithCF({"pikachu", "dobrynia", "nikitich"}, options);
// Since we will reopen DB with smaller write_buffer_size,
// each key will go to new SST file
ASSERT_OK(Put(1, Key(10), DummyString(1000000)));
ASSERT_OK(Put(1, Key(10), DummyString(1000000)));
ASSERT_OK(Put(1, Key(10), DummyString(1000000)));
ASSERT_OK(Put(1, Key(10), DummyString(1000000)));
ASSERT_OK(Put(3, Key(10), DummyString(1)));
// Make 'dobrynia' to be flushed and new WAL file to be created
ASSERT_OK(Put(2, Key(10), DummyString(7500000)));
ASSERT_OK(Put(2, Key(1), DummyString(1)));
dbfull()->TEST_WaitForFlushMemTable(handles_[2]);
{
auto tables = ListTableFiles(env_, dbname_);
ASSERT_EQ(tables.size(), static_cast<size_t>(1));
// Make sure 'dobrynia' was flushed: check sst files amount
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(1));
}
// New WAL file
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(3, Key(10), DummyString(1)));
ASSERT_OK(Put(3, Key(10), DummyString(1)));
ASSERT_OK(Put(3, Key(10), DummyString(1)));
options.write_buffer_size = 4096;
options.arena_block_size = 4096;
ReopenWithColumnFamilies({"default", "pikachu", "dobrynia", "nikitich"},
options);
{
// No inserts => default is empty
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(0));
// First 4 keys goes to separate SSTs + 1 more SST for 2 smaller keys
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(5));
// 1 SST for big key + 1 SST for small one
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(2));
// 1 SST for all keys
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(1));
}
}
// In https://reviews.facebook.net/D20661 we change
// recovery behavior: previously for each log file each column family
// memtable was flushed, even it wasn't empty. Now it's changed:
// we try to create the smallest number of table files by merging
// updates from multiple logs
TEST_F(DBTest, RecoverCheckFileAmount) {
Options options = CurrentOptions();
options.write_buffer_size = 100000;
options.arena_block_size = 4 * 1024;
CreateAndReopenWithCF({"pikachu", "dobrynia", "nikitich"}, options);
ASSERT_OK(Put(0, Key(1), DummyString(1)));
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(2, Key(1), DummyString(1)));
// Make 'nikitich' memtable to be flushed
ASSERT_OK(Put(3, Key(10), DummyString(1002400)));
ASSERT_OK(Put(3, Key(1), DummyString(1)));
dbfull()->TEST_WaitForFlushMemTable(handles_[3]);
// 4 memtable are not flushed, 1 sst file
{
auto tables = ListTableFiles(env_, dbname_);
ASSERT_EQ(tables.size(), static_cast<size_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(1));
}
// Memtable for 'nikitich' has flushed, new WAL file has opened
// 4 memtable still not flushed
// Write to new WAL file
ASSERT_OK(Put(0, Key(1), DummyString(1)));
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(2, Key(1), DummyString(1)));
// Fill up 'nikitich' one more time
ASSERT_OK(Put(3, Key(10), DummyString(1002400)));
// make it flush
ASSERT_OK(Put(3, Key(1), DummyString(1)));
dbfull()->TEST_WaitForFlushMemTable(handles_[3]);
// There are still 4 memtable not flushed, and 2 sst tables
ASSERT_OK(Put(0, Key(1), DummyString(1)));
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(2, Key(1), DummyString(1)));
{
auto tables = ListTableFiles(env_, dbname_);
ASSERT_EQ(tables.size(), static_cast<size_t>(2));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(2));
}
ReopenWithColumnFamilies({"default", "pikachu", "dobrynia", "nikitich"},
options);
{
std::vector<uint64_t> table_files = ListTableFiles(env_, dbname_);
// Check, that records for 'default', 'dobrynia' and 'pikachu' from
// first, second and third WALs went to the same SST.
// So, there is 6 SSTs: three for 'nikitich', one for 'default', one for
// 'dobrynia', one for 'pikachu'
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(3));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(1));
}
}
TEST_F(DBTest, SharedWriteBuffer) {
Options options = CurrentOptions();
options.db_write_buffer_size = 100000; // this is the real limit
options.write_buffer_size = 500000; // this is never hit
CreateAndReopenWithCF({"pikachu", "dobrynia", "nikitich"}, options);
// Trigger a flush on every CF
ASSERT_OK(Put(0, Key(1), DummyString(1)));
ASSERT_OK(Put(1, Key(1), DummyString(1)));
ASSERT_OK(Put(3, Key(1), DummyString(90000)));
ASSERT_OK(Put(2, Key(2), DummyString(20000)));
ASSERT_OK(Put(2, Key(1), DummyString(1)));
dbfull()->TEST_WaitForFlushMemTable(handles_[0]);
dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
dbfull()->TEST_WaitForFlushMemTable(handles_[2]);
dbfull()->TEST_WaitForFlushMemTable(handles_[3]);
{
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(1));
}
// Flush 'dobrynia' and 'nikitich'
ASSERT_OK(Put(2, Key(2), DummyString(50000)));
ASSERT_OK(Put(3, Key(2), DummyString(40000)));
ASSERT_OK(Put(2, Key(3), DummyString(20000)));
ASSERT_OK(Put(3, Key(2), DummyString(40000)));
dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
dbfull()->TEST_WaitForFlushMemTable(handles_[2]);
dbfull()->TEST_WaitForFlushMemTable(handles_[3]);
{
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(2));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(2));
}
// Make 'dobrynia' and 'nikitich' both take up 40% of space
// When 'pikachu' puts us over 100%, all 3 flush.
ASSERT_OK(Put(2, Key(2), DummyString(40000)));
ASSERT_OK(Put(1, Key(2), DummyString(20000)));
ASSERT_OK(Put(0, Key(1), DummyString(1)));
dbfull()->TEST_WaitForFlushMemTable(handles_[2]);
dbfull()->TEST_WaitForFlushMemTable(handles_[3]);
{
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(1));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(2));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(3));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(3));
}
// Some remaining writes so 'default' and 'nikitich' flush on closure.
ASSERT_OK(Put(3, Key(1), DummyString(1)));
ReopenWithColumnFamilies({"default", "pikachu", "dobrynia", "nikitich"},
options);
{
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "default"),
static_cast<uint64_t>(2));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"),
static_cast<uint64_t>(2));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "dobrynia"),
static_cast<uint64_t>(3));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "nikitich"),
static_cast<uint64_t>(4));
}
}
TEST_F(DBTest, PurgeInfoLogs) {
Options options = CurrentOptions();
options.keep_log_file_num = 5;
options.create_if_missing = true;
for (int mode = 0; mode <= 1; mode++) {
if (mode == 1) {
options.db_log_dir = dbname_ + "_logs";
env_->CreateDirIfMissing(options.db_log_dir);
} else {
options.db_log_dir = "";
}
for (int i = 0; i < 8; i++) {
Reopen(options);
}
std::vector<std::string> files;
env_->GetChildren(options.db_log_dir.empty() ? dbname_ : options.db_log_dir,
&files);
int info_log_count = 0;
for (std::string file : files) {
if (file.find("LOG") != std::string::npos) {
info_log_count++;
}
}
ASSERT_EQ(5, info_log_count);
Destroy(options);
// For mode (1), test DestroyDB() to delete all the logs under DB dir.
// For mode (2), no info log file should have been put under DB dir.
std::vector<std::string> db_files;
env_->GetChildren(dbname_, &db_files);
for (std::string file : db_files) {
ASSERT_TRUE(file.find("LOG") == std::string::npos);
}
if (mode == 1) {
// Cleaning up
env_->GetChildren(options.db_log_dir, &files);
for (std::string file : files) {
env_->DeleteFile(options.db_log_dir + "/" + file);
}
env_->DeleteDir(options.db_log_dir);
}
}
}
TEST_F(DBTest, SyncMultipleLogs) {
const uint64_t kNumBatches = 2;
const int kBatchSize = 1000;
Options options = CurrentOptions();
options.create_if_missing = true;
options.write_buffer_size = 4096;
Reopen(options);
WriteBatch batch;
WriteOptions wo;
wo.sync = true;
for (uint64_t b = 0; b < kNumBatches; b++) {
batch.Clear();
for (int i = 0; i < kBatchSize; i++) {
batch.Put(Key(i), DummyString(128));
}
dbfull()->Write(wo, &batch);
}
ASSERT_OK(dbfull()->SyncWAL());
}
//
// Test WAL recovery for the various modes available
//
class RecoveryTestHelper {
public:
// Number of WAL files to generate
static const int kWALFilesCount = 10;
// Starting number for the WAL file name like 00010.log
static const int kWALFileOffset = 10;
// Keys to be written per WAL file
static const int kKeysPerWALFile = 1024;
// Size of the value
static const int kValueSize = 10;
// Create WAL files with values filled in
static void FillData(DBTest* test, Options& options, const size_t wal_count,
size_t& count) {
DBOptions& db_options = options;
count = 0;
shared_ptr<Cache> table_cache = NewLRUCache(50000, 16);
EnvOptions env_options;
WriteBuffer write_buffer(db_options.db_write_buffer_size);
unique_ptr<VersionSet> versions;
unique_ptr<WalManager> wal_manager;
WriteController write_controller;
versions.reset(new VersionSet(test->dbname_, &db_options, env_options,
table_cache.get(), &write_buffer,
&write_controller));
wal_manager.reset(new WalManager(db_options, env_options));
std::unique_ptr<log::Writer> current_log_writer;
for (size_t j = kWALFileOffset; j < wal_count + kWALFileOffset; j++) {
uint64_t current_log_number = j;
std::string fname = LogFileName(test->dbname_, current_log_number);
unique_ptr<WritableFile> file;
ASSERT_OK(db_options.env->NewWritableFile(fname, &file, env_options));
unique_ptr<WritableFileWriter> file_writer(
new WritableFileWriter(std::move(file), env_options));
current_log_writer.reset(new log::Writer(std::move(file_writer)));
for (int i = 0; i < kKeysPerWALFile; i++) {
std::string key = "key" + ToString(count++);
std::string value = test->DummyString(kValueSize);
assert(current_log_writer.get() != nullptr);
uint64_t seq = versions->LastSequence() + 1;
WriteBatch batch;
batch.Put(key, value);
WriteBatchInternal::SetSequence(&batch, seq);
current_log_writer->AddRecord(WriteBatchInternal::Contents(&batch));
versions->SetLastSequence(seq);
}
}
}
// Recreate and fill the store with some data
static size_t FillData(DBTest* test, Options& options) {
options.create_if_missing = true;
test->DestroyAndReopen(options);
test->Close();
size_t count = 0;
FillData(test, options, kWALFilesCount, count);
return count;
}
// Read back all the keys we wrote and return the number of keys found
static size_t GetData(DBTest* test) {
size_t count = 0;
for (size_t i = 0; i < kWALFilesCount * kKeysPerWALFile; i++) {
if (test->Get("key" + ToString(i)) != "NOT_FOUND") {
++count;
}
}
return count;
}
// Manuall corrupt the specified WAL
static void CorruptWAL(DBTest* test, Options& options, const double off,
const double len, const int wal_file_id,
const bool trunc = false) {
Env* env = options.env;
std::string fname = LogFileName(test->dbname_, wal_file_id);
uint64_t size;
ASSERT_OK(env->GetFileSize(fname, &size));
ASSERT_GT(size, 0);
#ifdef OS_WIN
// Windows disk cache behaves differently. When we truncate
// the original content is still in the cache due to the original
// handle is still open. Generally, in Windows, one prohibits
// shared access to files and it is not needed for WAL but we allow
// it to induce corruption at various tests.
test->Close();
#endif
if (trunc) {
ASSERT_EQ(0, truncate(fname.c_str(), size * off));
} else {
InduceCorruption(fname, size * off, size * len);
}
}
// Overwrite data with 'a' from offset for length len
static void InduceCorruption(const std::string& filename, uint32_t offset,
uint32_t len) {
ASSERT_GT(len, 0);
int fd = open(filename.c_str(), O_RDWR);
ASSERT_GT(fd, 0);
ASSERT_EQ(offset, lseek(fd, offset, SEEK_SET));
void* buf = alloca(len);
memset(buf, 'a', len);
ASSERT_EQ(len, write(fd, buf, len));
close(fd);
}
};
// Test scope:
// - We expect to open the data store when there is incomplete trailing writes
// at the end of any of the logs
// - We do not expect to open the data store for corruption
TEST_F(DBTest, kTolerateCorruptedTailRecords) {
const int jstart = RecoveryTestHelper::kWALFileOffset;
const int jend = jstart + RecoveryTestHelper::kWALFilesCount;
for (auto trunc : {true, false}) { /* Corruption style */
for (int i = 0; i < 4; i++) { /* Corruption offset position */
for (int j = jstart; j < jend; j++) { /* WAL file */
// Fill data for testing
Options options = CurrentOptions();
const size_t row_count = RecoveryTestHelper::FillData(this, options);
// test checksum failure or parsing
RecoveryTestHelper::CorruptWAL(this, options, /*off=*/i * .3,
/*len%=*/.1, /*wal=*/j, trunc);
if (trunc) {
options.wal_recovery_mode =
WALRecoveryMode::kTolerateCorruptedTailRecords;
options.create_if_missing = false;
ASSERT_OK(TryReopen(options));
const size_t recovered_row_count = RecoveryTestHelper::GetData(this);
ASSERT_TRUE(i == 0 || recovered_row_count > 0);
ASSERT_LT(recovered_row_count, row_count);
} else {
options.wal_recovery_mode =
WALRecoveryMode::kTolerateCorruptedTailRecords;
ASSERT_NOK(TryReopen(options));
}
}
}
}
}
// Test scope:
// We don't expect the data store to be opened if there is any corruption
// (leading, middle or trailing -- incomplete writes or corruption)
TEST_F(DBTest, kAbsoluteConsistency) {
const int jstart = RecoveryTestHelper::kWALFileOffset;
const int jend = jstart + RecoveryTestHelper::kWALFilesCount;
// Verify clean slate behavior
Options options = CurrentOptions();
const size_t row_count = RecoveryTestHelper::FillData(this, options);
options.wal_recovery_mode = WALRecoveryMode::kAbsoluteConsistency;
options.create_if_missing = false;
ASSERT_OK(TryReopen(options));
ASSERT_EQ(RecoveryTestHelper::GetData(this), row_count);
for (auto trunc : {true, false}) { /* Corruption style */
for (int i = 0; i < 4; i++) { /* Corruption offset position */
if (trunc && i == 0) {
continue;
}
for (int j = jstart; j < jend; j++) { /* wal files */
// fill with new date
RecoveryTestHelper::FillData(this, options);
// corrupt the wal
RecoveryTestHelper::CorruptWAL(this, options, /*off=*/i * .3,
/*len%=*/.1, j, trunc);
// verify
options.wal_recovery_mode = WALRecoveryMode::kAbsoluteConsistency;
options.create_if_missing = false;
ASSERT_NOK(TryReopen(options));
}
}
}
}
// Test scope:
// - We expect to open data store under all circumstances
// - We expect only data upto the point where the first error was encountered
TEST_F(DBTest, kPointInTimeRecovery) {
const int jstart = RecoveryTestHelper::kWALFileOffset;
const int jend = jstart + RecoveryTestHelper::kWALFilesCount;
const int maxkeys =
RecoveryTestHelper::kWALFilesCount * RecoveryTestHelper::kKeysPerWALFile;
for (auto trunc : {true, false}) { /* Corruption style */
for (int i = 0; i < 4; i++) { /* Offset of corruption */
for (int j = jstart; j < jend; j++) { /* WAL file */
// Fill data for testing
Options options = CurrentOptions();
const size_t row_count = RecoveryTestHelper::FillData(this, options);
// Corrupt the wal
RecoveryTestHelper::CorruptWAL(this, options, /*off=*/i * .3,
/*len%=*/.1, j, trunc);
// Verify
options.wal_recovery_mode = WALRecoveryMode::kPointInTimeRecovery;
options.create_if_missing = false;
ASSERT_OK(TryReopen(options));
// Probe data for invariants
size_t recovered_row_count = RecoveryTestHelper::GetData(this);
ASSERT_LT(recovered_row_count, row_count);
bool expect_data = true;
for (size_t k = 0; k < maxkeys; ++k) {
bool found = Get("key" + ToString(i)) != "NOT_FOUND";
if (expect_data && !found) {
expect_data = false;
}
ASSERT_EQ(found, expect_data);
}
const size_t min = RecoveryTestHelper::kKeysPerWALFile *
(j - RecoveryTestHelper::kWALFileOffset);
ASSERT_GE(recovered_row_count, min);
if (!trunc && i != 0) {
const size_t max = RecoveryTestHelper::kKeysPerWALFile *
(j - RecoveryTestHelper::kWALFileOffset + 1);
ASSERT_LE(recovered_row_count, max);
}
}
}
}
}
// Test scope:
// - We expect to open the data store under all scenarios
// - We expect to have recovered records past the corruption zone
TEST_F(DBTest, kSkipAnyCorruptedRecords) {
const int jstart = RecoveryTestHelper::kWALFileOffset;
const int jend = jstart + RecoveryTestHelper::kWALFilesCount;
for (auto trunc : {true, false}) { /* Corruption style */
for (int i = 0; i < 4; i++) { /* Corruption offset */
for (int j = jstart; j < jend; j++) { /* wal files */
// Fill data for testing
Options options = CurrentOptions();
const size_t row_count = RecoveryTestHelper::FillData(this, options);
// Corrupt the WAL
RecoveryTestHelper::CorruptWAL(this, options, /*off=*/i * .3,
/*len%=*/.1, j, trunc);
// Verify behavior
options.wal_recovery_mode = WALRecoveryMode::kSkipAnyCorruptedRecords;
options.create_if_missing = false;
ASSERT_OK(TryReopen(options));
// Probe data for invariants
size_t recovered_row_count = RecoveryTestHelper::GetData(this);
ASSERT_LT(recovered_row_count, row_count);
if (!trunc) {
ASSERT_TRUE(i != 0 || recovered_row_count > 0);
}
}
}
}
}
// Multi-threaded test:
namespace {
static const int kColumnFamilies = 10;
static const int kNumThreads = 10;
static const int kTestSeconds = 10;
static const int kNumKeys = 1000;
struct MTState {
DBTest* test;
std::atomic<bool> stop;
std::atomic<int> counter[kNumThreads];
std::atomic<bool> thread_done[kNumThreads];
};
struct MTThread {
MTState* state;
int id;
};
static void MTThreadBody(void* arg) {
MTThread* t = reinterpret_cast<MTThread*>(arg);
int id = t->id;
DB* db = t->state->test->db_;
int counter = 0;
fprintf(stderr, "... starting thread %d\n", id);
Random rnd(1000 + id);
char valbuf[1500];
while (t->state->stop.load(std::memory_order_acquire) == false) {
t->state->counter[id].store(counter, std::memory_order_release);
int key = rnd.Uniform(kNumKeys);
char keybuf[20];
snprintf(keybuf, sizeof(keybuf), "%016d", key);
if (rnd.OneIn(2)) {
// Write values of the form <key, my id, counter, cf, unique_id>.
// into each of the CFs
// We add some padding for force compactions.
int unique_id = rnd.Uniform(1000000);
// Half of the time directly use WriteBatch. Half of the time use
// WriteBatchWithIndex.
if (rnd.OneIn(2)) {
WriteBatch batch;
for (int cf = 0; cf < kColumnFamilies; ++cf) {
snprintf(valbuf, sizeof(valbuf), "%d.%d.%d.%d.%-1000d", key, id,
static_cast<int>(counter), cf, unique_id);
batch.Put(t->state->test->handles_[cf], Slice(keybuf), Slice(valbuf));
}
ASSERT_OK(db->Write(WriteOptions(), &batch));
} else {
WriteBatchWithIndex batch(db->GetOptions().comparator);
for (int cf = 0; cf < kColumnFamilies; ++cf) {
snprintf(valbuf, sizeof(valbuf), "%d.%d.%d.%d.%-1000d", key, id,
static_cast<int>(counter), cf, unique_id);
batch.Put(t->state->test->handles_[cf], Slice(keybuf), Slice(valbuf));
}
ASSERT_OK(db->Write(WriteOptions(), batch.GetWriteBatch()));
}
} else {
// Read a value and verify that it matches the pattern written above
// and that writes to all column families were atomic (unique_id is the
// same)
std::vector<Slice> keys(kColumnFamilies, Slice(keybuf));
std::vector<std::string> values;
std::vector<Status> statuses =
db->MultiGet(ReadOptions(), t->state->test->handles_, keys, &values);
Status s = statuses[0];
// all statuses have to be the same
for (size_t i = 1; i < statuses.size(); ++i) {
// they are either both ok or both not-found
ASSERT_TRUE((s.ok() && statuses[i].ok()) ||
(s.IsNotFound() && statuses[i].IsNotFound()));
}
if (s.IsNotFound()) {
// Key has not yet been written
} else {
// Check that the writer thread counter is >= the counter in the value
ASSERT_OK(s);
int unique_id = -1;
for (int i = 0; i < kColumnFamilies; ++i) {
int k, w, c, cf, u;
ASSERT_EQ(5, sscanf(values[i].c_str(), "%d.%d.%d.%d.%d", &k, &w,
&c, &cf, &u))
<< values[i];
ASSERT_EQ(k, key);
ASSERT_GE(w, 0);
ASSERT_LT(w, kNumThreads);
ASSERT_LE(c, t->state->counter[w].load(std::memory_order_acquire));
ASSERT_EQ(cf, i);
if (i == 0) {
unique_id = u;
} else {
// this checks that updates across column families happened
// atomically -- all unique ids are the same
ASSERT_EQ(u, unique_id);
}
}
}
}
counter++;
}
t->state->thread_done[id].store(true, std::memory_order_release);
fprintf(stderr, "... stopping thread %d after %d ops\n", id, int(counter));
}
} // namespace
class MultiThreadedDBTest : public DBTest,
public ::testing::WithParamInterface<int> {
public:
virtual void SetUp() override { option_config_ = GetParam(); }
static std::vector<int> GenerateOptionConfigs() {
std::vector<int> optionConfigs;
for (int optionConfig = kDefault; optionConfig < kEnd; ++optionConfig) {
// skip as HashCuckooRep does not support snapshot
if (optionConfig != kHashCuckoo) {
optionConfigs.push_back(optionConfig);
}
}
return optionConfigs;
}
};
TEST_P(MultiThreadedDBTest, MultiThreaded) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
std::vector<std::string> cfs;
for (int i = 1; i < kColumnFamilies; ++i) {
cfs.push_back(ToString(i));
}
CreateAndReopenWithCF(cfs, CurrentOptions(options_override));
// Initialize state
MTState mt;
mt.test = this;
mt.stop.store(false, std::memory_order_release);
for (int id = 0; id < kNumThreads; id++) {
mt.counter[id].store(0, std::memory_order_release);
mt.thread_done[id].store(false, std::memory_order_release);
}
// Start threads
MTThread thread[kNumThreads];
for (int id = 0; id < kNumThreads; id++) {
thread[id].state = &mt;
thread[id].id = id;
env_->StartThread(MTThreadBody, &thread[id]);
}
// Let them run for a while
env_->SleepForMicroseconds(kTestSeconds * 1000000);
// Stop the threads and wait for them to finish
mt.stop.store(true, std::memory_order_release);
for (int id = 0; id < kNumThreads; id++) {
while (mt.thread_done[id].load(std::memory_order_acquire) == false) {
env_->SleepForMicroseconds(100000);
}
}
}
INSTANTIATE_TEST_CASE_P(
MultiThreaded, MultiThreadedDBTest,
::testing::ValuesIn(MultiThreadedDBTest::GenerateOptionConfigs()));
// Group commit test:
namespace {
static const int kGCNumThreads = 4;
static const int kGCNumKeys = 1000;
struct GCThread {
DB* db;
int id;
std::atomic<bool> done;
};
static void GCThreadBody(void* arg) {
GCThread* t = reinterpret_cast<GCThread*>(arg);
int id = t->id;
DB* db = t->db;
WriteOptions wo;
for (int i = 0; i < kGCNumKeys; ++i) {
std::string kv(ToString(i + id * kGCNumKeys));
ASSERT_OK(db->Put(wo, kv, kv));
}
t->done = true;
}
} // namespace
TEST_F(DBTest, GroupCommitTest) {
do {
Options options = CurrentOptions();
options.env = env_;
env_->log_write_slowdown_.store(100);
options.statistics = rocksdb::CreateDBStatistics();
Reopen(options);
// Start threads
GCThread thread[kGCNumThreads];
for (int id = 0; id < kGCNumThreads; id++) {
thread[id].id = id;
thread[id].db = db_;
thread[id].done = false;
env_->StartThread(GCThreadBody, &thread[id]);
}
for (int id = 0; id < kGCNumThreads; id++) {
while (thread[id].done == false) {
env_->SleepForMicroseconds(100000);
}
}
env_->log_write_slowdown_.store(0);
ASSERT_GT(TestGetTickerCount(options, WRITE_DONE_BY_OTHER), 0);
std::vector<std::string> expected_db;
for (int i = 0; i < kGCNumThreads * kGCNumKeys; ++i) {
expected_db.push_back(ToString(i));
}
sort(expected_db.begin(), expected_db.end());
Iterator* itr = db_->NewIterator(ReadOptions());
itr->SeekToFirst();
for (auto x : expected_db) {
ASSERT_TRUE(itr->Valid());
ASSERT_EQ(itr->key().ToString(), x);
ASSERT_EQ(itr->value().ToString(), x);
itr->Next();
}
ASSERT_TRUE(!itr->Valid());
delete itr;
HistogramData hist_data = {0};
options.statistics->histogramData(DB_WRITE, &hist_data);
ASSERT_GT(hist_data.average, 0.0);
} while (ChangeOptions(kSkipNoSeekToLast));
}
namespace {
typedef std::map<std::string, std::string> KVMap;
}
class ModelDB: public DB {
public:
class ModelSnapshot : public Snapshot {
public:
KVMap map_;
virtual SequenceNumber GetSequenceNumber() const override {
// no need to call this
assert(false);
return 0;
}
};
explicit ModelDB(const Options& options) : options_(options) {}
using DB::Put;
virtual Status Put(const WriteOptions& o, ColumnFamilyHandle* cf,
const Slice& k, const Slice& v) override {
WriteBatch batch;
batch.Put(cf, k, v);
return Write(o, &batch);
}
using DB::Delete;
virtual Status Delete(const WriteOptions& o, ColumnFamilyHandle* cf,
const Slice& key) override {
WriteBatch batch;
batch.Delete(cf, key);
return Write(o, &batch);
}
using DB::SingleDelete;
virtual Status SingleDelete(const WriteOptions& o, ColumnFamilyHandle* cf,
const Slice& key) override {
WriteBatch batch;
batch.SingleDelete(cf, key);
return Write(o, &batch);
}
using DB::Merge;
virtual Status Merge(const WriteOptions& o, ColumnFamilyHandle* cf,
const Slice& k, const Slice& v) override {
WriteBatch batch;
batch.Merge(cf, k, v);
return Write(o, &batch);
}
using DB::Get;
virtual Status Get(const ReadOptions& options, ColumnFamilyHandle* cf,
const Slice& key, std::string* value) override {
return Status::NotSupported(key);
}
using DB::MultiGet;
virtual std::vector<Status> MultiGet(
const ReadOptions& options,
const std::vector<ColumnFamilyHandle*>& column_family,
const std::vector<Slice>& keys,
std::vector<std::string>* values) override {
std::vector<Status> s(keys.size(),
Status::NotSupported("Not implemented."));
return s;
}
using DB::GetPropertiesOfAllTables;
virtual Status GetPropertiesOfAllTables(
ColumnFamilyHandle* column_family,
TablePropertiesCollection* props) override {
return Status();
}
using DB::KeyMayExist;
virtual bool KeyMayExist(const ReadOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
std::string* value,
bool* value_found = nullptr) override {
if (value_found != nullptr) {
*value_found = false;
}
return true; // Not Supported directly
}
using DB::NewIterator;
virtual Iterator* NewIterator(const ReadOptions& options,
ColumnFamilyHandle* column_family) override {
if (options.snapshot == nullptr) {
KVMap* saved = new KVMap;
*saved = map_;
return new ModelIter(saved, true);
} else {
const KVMap* snapshot_state =
&(reinterpret_cast<const ModelSnapshot*>(options.snapshot)->map_);
return new ModelIter(snapshot_state, false);
}
}
virtual Status NewIterators(
const ReadOptions& options,
const std::vector<ColumnFamilyHandle*>& column_family,
std::vector<Iterator*>* iterators) override {
return Status::NotSupported("Not supported yet");
}
virtual const Snapshot* GetSnapshot() override {
ModelSnapshot* snapshot = new ModelSnapshot;
snapshot->map_ = map_;
return snapshot;
}
virtual void ReleaseSnapshot(const Snapshot* snapshot) override {
delete reinterpret_cast<const ModelSnapshot*>(snapshot);
}
virtual Status Write(const WriteOptions& options,
WriteBatch* batch) override {
class Handler : public WriteBatch::Handler {
public:
KVMap* map_;
virtual void Put(const Slice& key, const Slice& value) override {
(*map_)[key.ToString()] = value.ToString();
}
virtual void Merge(const Slice& key, const Slice& value) override {
// ignore merge for now
//(*map_)[key.ToString()] = value.ToString();
}
virtual void Delete(const Slice& key) override {
map_->erase(key.ToString());
}
};
Handler handler;
handler.map_ = &map_;
return batch->Iterate(&handler);
}
using DB::GetProperty;
virtual bool GetProperty(ColumnFamilyHandle* column_family,
const Slice& property, std::string* value) override {
return false;
}
using DB::GetIntProperty;
virtual bool GetIntProperty(ColumnFamilyHandle* column_family,
const Slice& property, uint64_t* value) override {
return false;
}
using DB::GetApproximateSizes;
virtual void GetApproximateSizes(ColumnFamilyHandle* column_family,
const Range* range, int n, uint64_t* sizes,
bool include_memtable) override {
for (int i = 0; i < n; i++) {
sizes[i] = 0;
}
}
using DB::CompactRange;
virtual Status CompactRange(const CompactRangeOptions& options,
ColumnFamilyHandle* column_family,
const Slice* start, const Slice* end) override {
return Status::NotSupported("Not supported operation.");
}
using DB::CompactFiles;
virtual Status CompactFiles(
const CompactionOptions& compact_options,
ColumnFamilyHandle* column_family,
const std::vector<std::string>& input_file_names,
const int output_level, const int output_path_id = -1) override {
return Status::NotSupported("Not supported operation.");
}
using DB::NumberLevels;
virtual int NumberLevels(ColumnFamilyHandle* column_family) override {
return 1;
}
using DB::MaxMemCompactionLevel;
virtual int MaxMemCompactionLevel(
ColumnFamilyHandle* column_family) override {
return 1;
}
using DB::Level0StopWriteTrigger;
virtual int Level0StopWriteTrigger(
ColumnFamilyHandle* column_family) override {
return -1;
}
virtual const std::string& GetName() const override { return name_; }
virtual Env* GetEnv() const override { return nullptr; }
using DB::GetOptions;
virtual const Options& GetOptions(
ColumnFamilyHandle* column_family) const override {
return options_;
}
using DB::GetDBOptions;
virtual const DBOptions& GetDBOptions() const override { return options_; }
using DB::Flush;
virtual Status Flush(const rocksdb::FlushOptions& options,
ColumnFamilyHandle* column_family) override {
Status ret;
return ret;
}
virtual Status SyncWAL() override {
return Status::OK();
}
virtual Status DisableFileDeletions() override { return Status::OK(); }
virtual Status EnableFileDeletions(bool force) override {
return Status::OK();
}
virtual Status GetLiveFiles(std::vector<std::string>&, uint64_t* size,
bool flush_memtable = true) override {
return Status::OK();
}
virtual Status GetSortedWalFiles(VectorLogPtr& files) override {
return Status::OK();
}
virtual Status DeleteFile(std::string name) override { return Status::OK(); }
virtual Status GetDbIdentity(std::string& identity) const override {
return Status::OK();
}
virtual SequenceNumber GetLatestSequenceNumber() const override { return 0; }
virtual Status GetUpdatesSince(
rocksdb::SequenceNumber, unique_ptr<rocksdb::TransactionLogIterator>*,
const TransactionLogIterator::ReadOptions&
read_options = TransactionLogIterator::ReadOptions()) override {
return Status::NotSupported("Not supported in Model DB");
}
virtual ColumnFamilyHandle* DefaultColumnFamily() const override {
return nullptr;
}
virtual void GetColumnFamilyMetaData(
ColumnFamilyHandle* column_family,
ColumnFamilyMetaData* metadata) override {}
private:
class ModelIter: public Iterator {
public:
ModelIter(const KVMap* map, bool owned)
: map_(map), owned_(owned), iter_(map_->end()) {
}
~ModelIter() {
if (owned_) delete map_;
}
virtual bool Valid() const override { return iter_ != map_->end(); }
virtual void SeekToFirst() override { iter_ = map_->begin(); }
virtual void SeekToLast() override {
if (map_->empty()) {
iter_ = map_->end();
} else {
iter_ = map_->find(map_->rbegin()->first);
}
}
virtual void Seek(const Slice& k) override {
iter_ = map_->lower_bound(k.ToString());
}
virtual void Next() override { ++iter_; }
virtual void Prev() override {
if (iter_ == map_->begin()) {
iter_ = map_->end();
return;
}
--iter_;
}
virtual Slice key() const override { return iter_->first; }
virtual Slice value() const override { return iter_->second; }
virtual Status status() const override { return Status::OK(); }
private:
const KVMap* const map_;
const bool owned_; // Do we own map_
KVMap::const_iterator iter_;
};
const Options options_;
KVMap map_;
std::string name_ = "";
};
static std::string RandomKey(Random* rnd, int minimum = 0) {
int len;
do {
len = (rnd->OneIn(3)
? 1 // Short sometimes to encourage collisions
: (rnd->OneIn(100) ? rnd->Skewed(10) : rnd->Uniform(10)));
} while (len < minimum);
return test::RandomKey(rnd, len);
}
static bool CompareIterators(int step,
DB* model,
DB* db,
const Snapshot* model_snap,
const Snapshot* db_snap) {
ReadOptions options;
options.snapshot = model_snap;
Iterator* miter = model->NewIterator(options);
options.snapshot = db_snap;
Iterator* dbiter = db->NewIterator(options);
bool ok = true;
int count = 0;
for (miter->SeekToFirst(), dbiter->SeekToFirst();
ok && miter->Valid() && dbiter->Valid();
miter->Next(), dbiter->Next()) {
count++;
if (miter->key().compare(dbiter->key()) != 0) {
fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n",
step,
EscapeString(miter->key()).c_str(),
EscapeString(dbiter->key()).c_str());
ok = false;
break;
}
if (miter->value().compare(dbiter->value()) != 0) {
fprintf(stderr, "step %d: Value mismatch for key '%s': '%s' vs. '%s'\n",
step,
EscapeString(miter->key()).c_str(),
EscapeString(miter->value()).c_str(),
EscapeString(miter->value()).c_str());
ok = false;
}
}
if (ok) {
if (miter->Valid() != dbiter->Valid()) {
fprintf(stderr, "step %d: Mismatch at end of iterators: %d vs. %d\n",
step, miter->Valid(), dbiter->Valid());
ok = false;
}
}
delete miter;
delete dbiter;
return ok;
}
TEST_F(DBTest, Randomized) {
anon::OptionsOverride options_override;
options_override.skip_policy = kSkipNoSnapshot;
Random rnd(test::RandomSeed());
do {
ModelDB model(CurrentOptions(options_override));
const int N = 10000;
const Snapshot* model_snap = nullptr;
const Snapshot* db_snap = nullptr;
std::string k, v;
for (int step = 0; step < N; step++) {
// TODO(sanjay): Test Get() works
int p = rnd.Uniform(100);
int minimum = 0;
if (option_config_ == kHashSkipList ||
option_config_ == kHashLinkList ||
option_config_ == kHashCuckoo ||
option_config_ == kPlainTableFirstBytePrefix ||
option_config_ == kBlockBasedTableWithWholeKeyHashIndex ||
option_config_ == kBlockBasedTableWithPrefixHashIndex) {
minimum = 1;
}
if (p < 45) { // Put
k = RandomKey(&rnd, minimum);
v = RandomString(&rnd,
rnd.OneIn(20)
? 100 + rnd.Uniform(100)
: rnd.Uniform(8));
ASSERT_OK(model.Put(WriteOptions(), k, v));
ASSERT_OK(db_->Put(WriteOptions(), k, v));
} else if (p < 90) { // Delete
k = RandomKey(&rnd, minimum);
ASSERT_OK(model.Delete(WriteOptions(), k));
ASSERT_OK(db_->Delete(WriteOptions(), k));
} else { // Multi-element batch
WriteBatch b;
const int num = rnd.Uniform(8);
for (int i = 0; i < num; i++) {
if (i == 0 || !rnd.OneIn(10)) {
k = RandomKey(&rnd, minimum);
} else {
// Periodically re-use the same key from the previous iter, so
// we have multiple entries in the write batch for the same key
}
if (rnd.OneIn(2)) {
v = RandomString(&rnd, rnd.Uniform(10));
b.Put(k, v);
} else {
b.Delete(k);
}
}
ASSERT_OK(model.Write(WriteOptions(), &b));
ASSERT_OK(db_->Write(WriteOptions(), &b));
}
if ((step % 100) == 0) {
// For DB instances that use the hash index + block-based table, the
// iterator will be invalid right when seeking a non-existent key, right
// than return a key that is close to it.
if (option_config_ != kBlockBasedTableWithWholeKeyHashIndex &&
option_config_ != kBlockBasedTableWithPrefixHashIndex) {
ASSERT_TRUE(CompareIterators(step, &model, db_, nullptr, nullptr));
ASSERT_TRUE(CompareIterators(step, &model, db_, model_snap, db_snap));
}
// Save a snapshot from each DB this time that we'll use next
// time we compare things, to make sure the current state is
// preserved with the snapshot
if (model_snap != nullptr) model.ReleaseSnapshot(model_snap);
if (db_snap != nullptr) db_->ReleaseSnapshot(db_snap);
auto options = CurrentOptions(options_override);
Reopen(options);
ASSERT_TRUE(CompareIterators(step, &model, db_, nullptr, nullptr));
model_snap = model.GetSnapshot();
db_snap = db_->GetSnapshot();
}
if ((step % 2000) == 0) {
fprintf(stderr,
"DBTest.Randomized, option ID: %d, step: %d out of %d\n",
option_config_, step, N);
}
}
if (model_snap != nullptr) model.ReleaseSnapshot(model_snap);
if (db_snap != nullptr) db_->ReleaseSnapshot(db_snap);
// skip cuckoo hash as it does not support snapshot.
} while (ChangeOptions(kSkipDeletesFilterFirst | kSkipNoSeekToLast |
kSkipHashCuckoo));
}
TEST_F(DBTest, MultiGetSimple) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "k1", "v1"));
ASSERT_OK(Put(1, "k2", "v2"));
ASSERT_OK(Put(1, "k3", "v3"));
ASSERT_OK(Put(1, "k4", "v4"));
ASSERT_OK(Delete(1, "k4"));
ASSERT_OK(Put(1, "k5", "v5"));
ASSERT_OK(Delete(1, "no_key"));
std::vector<Slice> keys({"k1", "k2", "k3", "k4", "k5", "no_key"});
std::vector<std::string> values(20, "Temporary data to be overwritten");
std::vector<ColumnFamilyHandle*> cfs(keys.size(), handles_[1]);
std::vector<Status> s = db_->MultiGet(ReadOptions(), cfs, keys, &values);
ASSERT_EQ(values.size(), keys.size());
ASSERT_EQ(values[0], "v1");
ASSERT_EQ(values[1], "v2");
ASSERT_EQ(values[2], "v3");
ASSERT_EQ(values[4], "v5");
ASSERT_OK(s[0]);
ASSERT_OK(s[1]);
ASSERT_OK(s[2]);
ASSERT_TRUE(s[3].IsNotFound());
ASSERT_OK(s[4]);
ASSERT_TRUE(s[5].IsNotFound());
} while (ChangeCompactOptions());
}
TEST_F(DBTest, MultiGetEmpty) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
// Empty Key Set
std::vector<Slice> keys;
std::vector<std::string> values;
std::vector<ColumnFamilyHandle*> cfs;
std::vector<Status> s = db_->MultiGet(ReadOptions(), cfs, keys, &values);
ASSERT_EQ(s.size(), 0U);
// Empty Database, Empty Key Set
Options options = CurrentOptions();
options.create_if_missing = true;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
s = db_->MultiGet(ReadOptions(), cfs, keys, &values);
ASSERT_EQ(s.size(), 0U);
// Empty Database, Search for Keys
keys.resize(2);
keys[0] = "a";
keys[1] = "b";
cfs.push_back(handles_[0]);
cfs.push_back(handles_[1]);
s = db_->MultiGet(ReadOptions(), cfs, keys, &values);
ASSERT_EQ((int)s.size(), 2);
ASSERT_TRUE(s[0].IsNotFound() && s[1].IsNotFound());
} while (ChangeCompactOptions());
}
namespace {
void PrefixScanInit(DBTest *dbtest) {
char buf[100];
std::string keystr;
const int small_range_sstfiles = 5;
const int big_range_sstfiles = 5;
// Generate 11 sst files with the following prefix ranges.
// GROUP 0: [0,10] (level 1)
// GROUP 1: [1,2], [2,3], [3,4], [4,5], [5, 6] (level 0)
// GROUP 2: [0,6], [0,7], [0,8], [0,9], [0,10] (level 0)
//
// A seek with the previous API would do 11 random I/Os (to all the
// files). With the new API and a prefix filter enabled, we should
// only do 2 random I/O, to the 2 files containing the key.
// GROUP 0
snprintf(buf, sizeof(buf), "%02d______:start", 0);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
snprintf(buf, sizeof(buf), "%02d______:end", 10);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
dbtest->Flush();
dbtest->dbfull()->CompactRange(CompactRangeOptions(), nullptr,
nullptr); // move to level 1
// GROUP 1
for (int i = 1; i <= small_range_sstfiles; i++) {
snprintf(buf, sizeof(buf), "%02d______:start", i);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
snprintf(buf, sizeof(buf), "%02d______:end", i+1);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
dbtest->Flush();
}
// GROUP 2
for (int i = 1; i <= big_range_sstfiles; i++) {
snprintf(buf, sizeof(buf), "%02d______:start", 0);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
snprintf(buf, sizeof(buf), "%02d______:end",
small_range_sstfiles+i+1);
keystr = std::string(buf);
ASSERT_OK(dbtest->Put(keystr, keystr));
dbtest->Flush();
}
}
} // namespace
TEST_F(DBTest, PrefixScan) {
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip,
kSkipNoPrefix);
while (ChangeFilterOptions()) {
int count;
Slice prefix;
Slice key;
char buf[100];
Iterator* iter;
snprintf(buf, sizeof(buf), "03______:");
prefix = Slice(buf, 8);
key = Slice(buf, 9);
ASSERT_EQ(key.difference_offset(prefix), 8);
ASSERT_EQ(prefix.difference_offset(key), 8);
// db configs
env_->count_random_reads_ = true;
Options options = CurrentOptions();
options.env = env_;
options.prefix_extractor.reset(NewFixedPrefixTransform(8));
options.disable_auto_compactions = true;
options.max_background_compactions = 2;
options.create_if_missing = true;
options.memtable_factory.reset(NewHashSkipListRepFactory(16));
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
table_options.whole_key_filtering = false;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
// 11 RAND I/Os
DestroyAndReopen(options);
PrefixScanInit(this);
count = 0;
env_->random_read_counter_.Reset();
iter = db_->NewIterator(ReadOptions());
for (iter->Seek(prefix); iter->Valid(); iter->Next()) {
if (! iter->key().starts_with(prefix)) {
break;
}
count++;
}
ASSERT_OK(iter->status());
delete iter;
ASSERT_EQ(count, 2);
ASSERT_EQ(env_->random_read_counter_.Read(), 2);
Close();
} // end of while
XFUNC_TEST("", "dbtest_prefix", prefix_skip1, XFuncPoint::SetSkip, 0);
}
TEST_F(DBTest, BlockBasedTablePrefixIndexTest) {
// create a DB with block prefix index
BlockBasedTableOptions table_options;
Options options = CurrentOptions();
table_options.index_type = BlockBasedTableOptions::kHashSearch;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewFixedPrefixTransform(1));
Reopen(options);
ASSERT_OK(Put("k1", "v1"));
Flush();
ASSERT_OK(Put("k2", "v2"));
// Reopen it without prefix extractor, make sure everything still works.
// RocksDB should just fall back to the binary index.
table_options.index_type = BlockBasedTableOptions::kBinarySearch;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.prefix_extractor.reset();
Reopen(options);
ASSERT_EQ("v1", Get("k1"));
ASSERT_EQ("v2", Get("k2"));
}
TEST_F(DBTest, ChecksumTest) {
BlockBasedTableOptions table_options;
Options options = CurrentOptions();
table_options.checksum = kCRC32c;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_OK(Put("a", "b"));
ASSERT_OK(Put("c", "d"));
ASSERT_OK(Flush()); // table with crc checksum
table_options.checksum = kxxHash;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_OK(Put("e", "f"));
ASSERT_OK(Put("g", "h"));
ASSERT_OK(Flush()); // table with xxhash checksum
table_options.checksum = kCRC32c;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_EQ("b", Get("a"));
ASSERT_EQ("d", Get("c"));
ASSERT_EQ("f", Get("e"));
ASSERT_EQ("h", Get("g"));
table_options.checksum = kCRC32c;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_EQ("b", Get("a"));
ASSERT_EQ("d", Get("c"));
ASSERT_EQ("f", Get("e"));
ASSERT_EQ("h", Get("g"));
}
TEST_P(DBTestWithParam, FIFOCompactionTest) {
for (int iter = 0; iter < 2; ++iter) {
// first iteration -- auto compaction
// second iteration -- manual compaction
Options options;
options.compaction_style = kCompactionStyleFIFO;
options.write_buffer_size = 100 << 10; // 100KB
options.arena_block_size = 4096;
options.compaction_options_fifo.max_table_files_size = 500 << 10; // 500KB
options.compression = kNoCompression;
options.create_if_missing = true;
options.max_subcompactions = max_subcompactions_;
if (iter == 1) {
options.disable_auto_compactions = true;
}
options = CurrentOptions(options);
DestroyAndReopen(options);
Random rnd(301);
for (int i = 0; i < 6; ++i) {
for (int j = 0; j < 110; ++j) {
ASSERT_OK(Put(ToString(i * 100 + j), RandomString(&rnd, 980)));
}
// flush should happen here
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
}
if (iter == 0) {
ASSERT_OK(dbfull()->TEST_WaitForCompact());
} else {
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
}
// only 5 files should survive
ASSERT_EQ(NumTableFilesAtLevel(0), 5);
for (int i = 0; i < 50; ++i) {
// these keys should be deleted in previous compaction
ASSERT_EQ("NOT_FOUND", Get(ToString(i)));
}
}
}
// verify that we correctly deprecated timeout_hint_us
TEST_F(DBTest, SimpleWriteTimeoutTest) {
WriteOptions write_opt;
write_opt.timeout_hint_us = 0;
ASSERT_OK(Put(Key(1), Key(1) + std::string(100, 'v'), write_opt));
write_opt.timeout_hint_us = 10;
ASSERT_NOK(Put(Key(1), Key(1) + std::string(100, 'v'), write_opt));
}
/*
* This test is not reliable enough as it heavily depends on disk behavior.
*/
TEST_F(DBTest, RateLimitingTest) {
Options options = CurrentOptions();
options.write_buffer_size = 1 << 20; // 1MB
options.level0_file_num_compaction_trigger = 2;
options.target_file_size_base = 1 << 20; // 1MB
options.max_bytes_for_level_base = 4 << 20; // 4MB
options.max_bytes_for_level_multiplier = 4;
options.compression = kNoCompression;
options.create_if_missing = true;
options.env = env_;
options.IncreaseParallelism(4);
DestroyAndReopen(options);
WriteOptions wo;
wo.disableWAL = true;
// # no rate limiting
Random rnd(301);
uint64_t start = env_->NowMicros();
// Write ~96M data
for (int64_t i = 0; i < (96 << 10); ++i) {
ASSERT_OK(Put(RandomString(&rnd, 32),
RandomString(&rnd, (1 << 10) + 1), wo));
}
uint64_t elapsed = env_->NowMicros() - start;
double raw_rate = env_->bytes_written_ * 1000000 / elapsed;
Close();
// # rate limiting with 0.7 x threshold
options.rate_limiter.reset(
NewGenericRateLimiter(static_cast<int64_t>(0.7 * raw_rate)));
env_->bytes_written_ = 0;
DestroyAndReopen(options);
start = env_->NowMicros();
// Write ~96M data
for (int64_t i = 0; i < (96 << 10); ++i) {
ASSERT_OK(Put(RandomString(&rnd, 32),
RandomString(&rnd, (1 << 10) + 1), wo));
}
elapsed = env_->NowMicros() - start;
Close();
ASSERT_EQ(options.rate_limiter->GetTotalBytesThrough(), env_->bytes_written_);
double ratio = env_->bytes_written_ * 1000000 / elapsed / raw_rate;
fprintf(stderr, "write rate ratio = %.2lf, expected 0.7\n", ratio);
ASSERT_TRUE(ratio < 0.8);
// # rate limiting with half of the raw_rate
options.rate_limiter.reset(
NewGenericRateLimiter(static_cast<int64_t>(raw_rate / 2)));
env_->bytes_written_ = 0;
DestroyAndReopen(options);
start = env_->NowMicros();
// Write ~96M data
for (int64_t i = 0; i < (96 << 10); ++i) {
ASSERT_OK(Put(RandomString(&rnd, 32),
RandomString(&rnd, (1 << 10) + 1), wo));
}
elapsed = env_->NowMicros() - start;
Close();
ASSERT_EQ(options.rate_limiter->GetTotalBytesThrough(), env_->bytes_written_);
ratio = env_->bytes_written_ * 1000000 / elapsed / raw_rate;
fprintf(stderr, "write rate ratio = %.2lf, expected 0.5\n", ratio);
ASSERT_LT(ratio, 0.6);
}
TEST_F(DBTest, TableOptionsSanitizeTest) {
Options options = CurrentOptions();
options.create_if_missing = true;
DestroyAndReopen(options);
ASSERT_EQ(db_->GetOptions().allow_mmap_reads, false);
options.table_factory.reset(new PlainTableFactory());
options.prefix_extractor.reset(NewNoopTransform());
Destroy(options);
ASSERT_TRUE(TryReopen(options).IsNotSupported());
// Test for check of prefix_extractor when hash index is used for
// block-based table
BlockBasedTableOptions to;
to.index_type = BlockBasedTableOptions::kHashSearch;
options = CurrentOptions();
options.create_if_missing = true;
options.table_factory.reset(NewBlockBasedTableFactory(to));
ASSERT_TRUE(TryReopen(options).IsInvalidArgument());
options.prefix_extractor.reset(NewFixedPrefixTransform(1));
ASSERT_OK(TryReopen(options));
}
TEST_F(DBTest, SanitizeNumThreads) {
for (int attempt = 0; attempt < 2; attempt++) {
const size_t kTotalTasks = 8;
test::SleepingBackgroundTask sleeping_tasks[kTotalTasks];
Options options = CurrentOptions();
if (attempt == 0) {
options.max_background_compactions = 3;
options.max_background_flushes = 2;
}
options.create_if_missing = true;
DestroyAndReopen(options);
for (size_t i = 0; i < kTotalTasks; i++) {
// Insert 5 tasks to low priority queue and 5 tasks to high priority queue
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_tasks[i],
(i < 4) ? Env::Priority::LOW : Env::Priority::HIGH);
}
// Wait 100 milliseconds for they are scheduled.
env_->SleepForMicroseconds(100000);
// pool size 3, total task 4. Queue size should be 1.
ASSERT_EQ(1U, options.env->GetThreadPoolQueueLen(Env::Priority::LOW));
// pool size 2, total task 4. Queue size should be 2.
ASSERT_EQ(2U, options.env->GetThreadPoolQueueLen(Env::Priority::HIGH));
for (size_t i = 0; i < kTotalTasks; i++) {
sleeping_tasks[i].WakeUp();
sleeping_tasks[i].WaitUntilDone();
}
ASSERT_OK(Put("abc", "def"));
ASSERT_EQ("def", Get("abc"));
Flush();
ASSERT_EQ("def", Get("abc"));
}
}
TEST_F(DBTest, DBIteratorBoundTest) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.prefix_extractor = nullptr;
DestroyAndReopen(options);
ASSERT_OK(Put("a", "0"));
ASSERT_OK(Put("foo", "bar"));
ASSERT_OK(Put("foo1", "bar1"));
ASSERT_OK(Put("g1", "0"));
// testing basic case with no iterate_upper_bound and no prefix_extractor
{
ReadOptions ro;
ro.iterate_upper_bound = nullptr;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->Seek("foo");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("foo")), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("foo1")), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("g1")), 0);
}
// testing iterate_upper_bound and forward iterator
// to make sure it stops at bound
{
ReadOptions ro;
// iterate_upper_bound points beyond the last expected entry
Slice prefix("foo2");
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->Seek("foo");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("foo")), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(("foo1")), 0);
iter->Next();
// should stop here...
ASSERT_TRUE(!iter->Valid());
}
// Testing SeekToLast with iterate_upper_bound set
{
ReadOptions ro;
Slice prefix("foo");
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->SeekToLast();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("a")), 0);
}
// prefix is the first letter of the key
options.prefix_extractor.reset(NewFixedPrefixTransform(1));
DestroyAndReopen(options);
ASSERT_OK(Put("a", "0"));
ASSERT_OK(Put("foo", "bar"));
ASSERT_OK(Put("foo1", "bar1"));
ASSERT_OK(Put("g1", "0"));
// testing with iterate_upper_bound and prefix_extractor
// Seek target and iterate_upper_bound are not is same prefix
// This should be an error
{
ReadOptions ro;
Slice upper_bound("g");
ro.iterate_upper_bound = &upper_bound;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->Seek("foo");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("foo", iter->key().ToString());
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("foo1", iter->key().ToString());
iter->Next();
ASSERT_TRUE(!iter->Valid());
}
// testing that iterate_upper_bound prevents iterating over deleted items
// if the bound has already reached
{
options.prefix_extractor = nullptr;
DestroyAndReopen(options);
ASSERT_OK(Put("a", "0"));
ASSERT_OK(Put("b", "0"));
ASSERT_OK(Put("b1", "0"));
ASSERT_OK(Put("c", "0"));
ASSERT_OK(Put("d", "0"));
ASSERT_OK(Put("e", "0"));
ASSERT_OK(Delete("c"));
ASSERT_OK(Delete("d"));
// base case with no bound
ReadOptions ro;
ro.iterate_upper_bound = nullptr;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->Seek("b");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("b")), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(("b1")), 0);
perf_context.Reset();
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(static_cast<int>(perf_context.internal_delete_skipped_count), 2);
// now testing with iterate_bound
Slice prefix("c");
ro.iterate_upper_bound = &prefix;
iter.reset(db_->NewIterator(ro));
perf_context.Reset();
iter->Seek("b");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Slice("b")), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(("b1")), 0);
iter->Next();
// the iteration should stop as soon as the the bound key is reached
// even though the key is deleted
// hence internal_delete_skipped_count should be 0
ASSERT_TRUE(!iter->Valid());
ASSERT_EQ(static_cast<int>(perf_context.internal_delete_skipped_count), 0);
}
}
TEST_F(DBTest, WriteSingleThreadEntry) {
std::vector<std::thread> threads;
dbfull()->TEST_LockMutex();
auto w = dbfull()->TEST_BeginWrite();
threads.emplace_back([&] { Put("a", "b"); });
env_->SleepForMicroseconds(10000);
threads.emplace_back([&] { Flush(); });
env_->SleepForMicroseconds(10000);
dbfull()->TEST_UnlockMutex();
dbfull()->TEST_LockMutex();
dbfull()->TEST_EndWrite(w);
dbfull()->TEST_UnlockMutex();
for (auto& t : threads) {
t.join();
}
}
TEST_F(DBTest, DisableDataSyncTest) {
env_->sync_counter_.store(0);
// iter 0 -- no sync
// iter 1 -- sync
for (int iter = 0; iter < 2; ++iter) {
Options options = CurrentOptions();
options.disableDataSync = iter == 0;
options.create_if_missing = true;
options.num_levels = 10;
options.env = env_;
Reopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
MakeTables(10, "a", "z");
Compact("a", "z");
if (iter == 0) {
ASSERT_EQ(env_->sync_counter_.load(), 0);
} else {
ASSERT_GT(env_->sync_counter_.load(), 0);
}
Destroy(options);
}
}
TEST_F(DBTest, DynamicMemtableOptions) {
const uint64_t k64KB = 1 << 16;
const uint64_t k128KB = 1 << 17;
const uint64_t k5KB = 5 * 1024;
const int kNumPutsBeforeWaitForFlush = 64;
Options options;
options.env = env_;
options.create_if_missing = true;
options.compression = kNoCompression;
options.max_background_compactions = 1;
options.write_buffer_size = k64KB;
options.arena_block_size = 16 * 1024;
options.max_write_buffer_number = 2;
// Don't trigger compact/slowdown/stop
options.level0_file_num_compaction_trigger = 1024;
options.level0_slowdown_writes_trigger = 1024;
options.level0_stop_writes_trigger = 1024;
DestroyAndReopen(options);
auto gen_l0_kb = [this, kNumPutsBeforeWaitForFlush](int size) {
Random rnd(301);
for (int i = 0; i < size; i++) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
// The following condition prevents a race condition between flush jobs
// acquiring work and this thread filling up multiple memtables. Without
// this, the flush might produce less files than expected because
// multiple memtables are flushed into a single L0 file. This race
// condition affects assertion (A).
if (i % kNumPutsBeforeWaitForFlush == kNumPutsBeforeWaitForFlush - 1) {
dbfull()->TEST_WaitForFlushMemTable();
}
}
dbfull()->TEST_WaitForFlushMemTable();
};
// Test write_buffer_size
gen_l0_kb(64);
ASSERT_EQ(NumTableFilesAtLevel(0), 1);
ASSERT_LT(SizeAtLevel(0), k64KB + k5KB);
ASSERT_GT(SizeAtLevel(0), k64KB - k5KB * 2);
// Clean up L0
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
// Increase buffer size
ASSERT_OK(dbfull()->SetOptions({
{"write_buffer_size", "131072"},
}));
// The existing memtable is still 64KB in size, after it becomes immutable,
// the next memtable will be 128KB in size. Write 256KB total, we should
// have a 64KB L0 file, a 128KB L0 file, and a memtable with 64KB data
gen_l0_kb(256);
ASSERT_EQ(NumTableFilesAtLevel(0), 2); // (A)
ASSERT_LT(SizeAtLevel(0), k128KB + k64KB + 2 * k5KB);
ASSERT_GT(SizeAtLevel(0), k128KB + k64KB - 4 * k5KB);
// Test max_write_buffer_number
// Block compaction thread, which will also block the flushes because
// max_background_flushes == 0, so flushes are getting executed by the
// compaction thread
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
// Start from scratch and disable compaction/flush. Flush can only happen
// during compaction but trigger is pretty high
options.max_background_flushes = 0;
options.disable_auto_compactions = true;
DestroyAndReopen(options);
// Put until writes are stopped, bounded by 256 puts. We should see stop at
// ~128KB
int count = 0;
Random rnd(301);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DelayWrite:Wait",
[&](void* arg) { sleeping_task_low.WakeUp(); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
while (!sleeping_task_low.WokenUp() && count < 256) {
ASSERT_OK(Put(Key(count), RandomString(&rnd, 1024), WriteOptions()));
count++;
}
ASSERT_GT(static_cast<double>(count), 128 * 0.8);
ASSERT_LT(static_cast<double>(count), 128 * 1.2);
sleeping_task_low.WaitUntilDone();
// Increase
ASSERT_OK(dbfull()->SetOptions({
{"max_write_buffer_number", "8"},
}));
// Clean up memtable and L0
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
sleeping_task_low.Reset();
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
count = 0;
while (!sleeping_task_low.WokenUp() && count < 1024) {
ASSERT_OK(Put(Key(count), RandomString(&rnd, 1024), WriteOptions()));
count++;
}
// Windows fails this test. Will tune in the future and figure out
// approp number
#ifndef OS_WIN
ASSERT_GT(static_cast<double>(count), 512 * 0.8);
ASSERT_LT(static_cast<double>(count), 512 * 1.2);
#endif
sleeping_task_low.WaitUntilDone();
// Decrease
ASSERT_OK(dbfull()->SetOptions({
{"max_write_buffer_number", "4"},
}));
// Clean up memtable and L0
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
sleeping_task_low.Reset();
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
count = 0;
while (!sleeping_task_low.WokenUp() && count < 1024) {
ASSERT_OK(Put(Key(count), RandomString(&rnd, 1024), WriteOptions()));
count++;
}
// Windows fails this test. Will tune in the future and figure out
// approp number
#ifndef OS_WIN
ASSERT_GT(static_cast<double>(count), 256 * 0.8);
ASSERT_LT(static_cast<double>(count), 266 * 1.2);
#endif
sleeping_task_low.WaitUntilDone();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
#if ROCKSDB_USING_THREAD_STATUS
namespace {
void VerifyOperationCount(Env* env, ThreadStatus::OperationType op_type,
int expected_count) {
int op_count = 0;
std::vector<ThreadStatus> thread_list;
ASSERT_OK(env->GetThreadList(&thread_list));
for (auto thread : thread_list) {
if (thread.operation_type == op_type) {
op_count++;
}
}
ASSERT_EQ(op_count, expected_count);
}
} // namespace
TEST_F(DBTest, GetThreadStatus) {
Options options;
options.env = env_;
options.enable_thread_tracking = true;
TryReopen(options);
std::vector<ThreadStatus> thread_list;
Status s = env_->GetThreadList(&thread_list);
for (int i = 0; i < 2; ++i) {
// repeat the test with differet number of high / low priority threads
const int kTestCount = 3;
const unsigned int kHighPriCounts[kTestCount] = {3, 2, 5};
const unsigned int kLowPriCounts[kTestCount] = {10, 15, 3};
for (int test = 0; test < kTestCount; ++test) {
// Change the number of threads in high / low priority pool.
env_->SetBackgroundThreads(kHighPriCounts[test], Env::HIGH);
env_->SetBackgroundThreads(kLowPriCounts[test], Env::LOW);
// Wait to ensure the all threads has been registered
env_->SleepForMicroseconds(100000);
s = env_->GetThreadList(&thread_list);
ASSERT_OK(s);
unsigned int thread_type_counts[ThreadStatus::NUM_THREAD_TYPES];
memset(thread_type_counts, 0, sizeof(thread_type_counts));
for (auto thread : thread_list) {
ASSERT_LT(thread.thread_type, ThreadStatus::NUM_THREAD_TYPES);
thread_type_counts[thread.thread_type]++;
}
// Verify the total number of threades
ASSERT_EQ(
thread_type_counts[ThreadStatus::HIGH_PRIORITY] +
thread_type_counts[ThreadStatus::LOW_PRIORITY],
kHighPriCounts[test] + kLowPriCounts[test]);
// Verify the number of high-priority threads
ASSERT_EQ(
thread_type_counts[ThreadStatus::HIGH_PRIORITY],
kHighPriCounts[test]);
// Verify the number of low-priority threads
ASSERT_EQ(
thread_type_counts[ThreadStatus::LOW_PRIORITY],
kLowPriCounts[test]);
}
if (i == 0) {
// repeat the test with multiple column families
CreateAndReopenWithCF({"pikachu", "about-to-remove"}, options);
env_->GetThreadStatusUpdater()->TEST_VerifyColumnFamilyInfoMap(
handles_, true);
}
}
db_->DropColumnFamily(handles_[2]);
delete handles_[2];
handles_.erase(handles_.begin() + 2);
env_->GetThreadStatusUpdater()->TEST_VerifyColumnFamilyInfoMap(
handles_, true);
Close();
env_->GetThreadStatusUpdater()->TEST_VerifyColumnFamilyInfoMap(
handles_, true);
}
TEST_F(DBTest, DisableThreadStatus) {
Options options;
options.env = env_;
options.enable_thread_tracking = false;
TryReopen(options);
CreateAndReopenWithCF({"pikachu", "about-to-remove"}, options);
// Verify non of the column family info exists
env_->GetThreadStatusUpdater()->TEST_VerifyColumnFamilyInfoMap(
handles_, false);
}
TEST_F(DBTest, ThreadStatusFlush) {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options.enable_thread_tracking = true;
options = CurrentOptions(options);
rocksdb::SyncPoint::GetInstance()->LoadDependency({
{"FlushJob::FlushJob()", "DBTest::ThreadStatusFlush:1"},
{"DBTest::ThreadStatusFlush:2",
"FlushJob::LogAndNotifyTableFileCreation()"},
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
CreateAndReopenWithCF({"pikachu"}, options);
VerifyOperationCount(env_, ThreadStatus::OP_FLUSH, 0);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_EQ("v1", Get(1, "foo"));
VerifyOperationCount(env_, ThreadStatus::OP_FLUSH, 0);
Put(1, "k1", std::string(100000, 'x')); // Fill memtable
Put(1, "k2", std::string(100000, 'y')); // Trigger flush
// The first sync point is to make sure there's one flush job
// running when we perform VerifyOperationCount().
TEST_SYNC_POINT("DBTest::ThreadStatusFlush:1");
VerifyOperationCount(env_, ThreadStatus::OP_FLUSH, 1);
// This second sync point is to ensure the flush job will not
// be completed until we already perform VerifyOperationCount().
TEST_SYNC_POINT("DBTest::ThreadStatusFlush:2");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBTestWithParam, ThreadStatusSingleCompaction) {
const int kTestKeySize = 16;
const int kTestValueSize = 984;
const int kEntrySize = kTestKeySize + kTestValueSize;
const int kEntriesPerBuffer = 100;
Options options;
options.create_if_missing = true;
options.write_buffer_size = kEntrySize * kEntriesPerBuffer;
options.compaction_style = kCompactionStyleLevel;
options.target_file_size_base = options.write_buffer_size;
options.max_bytes_for_level_base = options.target_file_size_base * 2;
options.max_bytes_for_level_multiplier = 2;
options.compression = kNoCompression;
options = CurrentOptions(options);
options.env = env_;
options.enable_thread_tracking = true;
const int kNumL0Files = 4;
options.level0_file_num_compaction_trigger = kNumL0Files;
options.max_subcompactions = max_subcompactions_;
rocksdb::SyncPoint::GetInstance()->LoadDependency({
{"DBTest::ThreadStatusSingleCompaction:0", "DBImpl::BGWorkCompaction"},
{"CompactionJob::Run():Start", "DBTest::ThreadStatusSingleCompaction:1"},
{"DBTest::ThreadStatusSingleCompaction:2", "CompactionJob::Run():End"},
});
for (int tests = 0; tests < 2; ++tests) {
DestroyAndReopen(options);
rocksdb::SyncPoint::GetInstance()->ClearTrace();
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
// The Put Phase.
for (int file = 0; file < kNumL0Files; ++file) {
for (int key = 0; key < kEntriesPerBuffer; ++key) {
ASSERT_OK(Put(ToString(key + file * kEntriesPerBuffer),
RandomString(&rnd, kTestValueSize)));
}
Flush();
}
// This makes sure a compaction won't be scheduled until
// we have done with the above Put Phase.
TEST_SYNC_POINT("DBTest::ThreadStatusSingleCompaction:0");
ASSERT_GE(NumTableFilesAtLevel(0),
options.level0_file_num_compaction_trigger);
// This makes sure at least one compaction is running.
TEST_SYNC_POINT("DBTest::ThreadStatusSingleCompaction:1");
if (options.enable_thread_tracking) {
// expecting one single L0 to L1 compaction
VerifyOperationCount(env_, ThreadStatus::OP_COMPACTION, 1);
} else {
// If thread tracking is not enabled, compaction count should be 0.
VerifyOperationCount(env_, ThreadStatus::OP_COMPACTION, 0);
}
// TODO(yhchiang): adding assert to verify each compaction stage.
TEST_SYNC_POINT("DBTest::ThreadStatusSingleCompaction:2");
// repeat the test with disabling thread tracking.
options.enable_thread_tracking = false;
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_P(DBTestWithParam, PreShutdownManualCompaction) {
Options options = CurrentOptions();
options.max_background_flushes = 0;
options.max_subcompactions = max_subcompactions_;
CreateAndReopenWithCF({"pikachu"}, options);
// iter - 0 with 7 levels
// iter - 1 with 3 levels
for (int iter = 0; iter < 2; ++iter) {
MakeTables(3, "p", "q", 1);
ASSERT_EQ("1,1,1", FilesPerLevel(1));
// Compaction range falls before files
Compact(1, "", "c");
ASSERT_EQ("1,1,1", FilesPerLevel(1));
// Compaction range falls after files
Compact(1, "r", "z");
ASSERT_EQ("1,1,1", FilesPerLevel(1));
// Compaction range overlaps files
Compact(1, "p1", "p9");
ASSERT_EQ("0,0,1", FilesPerLevel(1));
// Populate a different range
MakeTables(3, "c", "e", 1);
ASSERT_EQ("1,1,2", FilesPerLevel(1));
// Compact just the new range
Compact(1, "b", "f");
ASSERT_EQ("0,0,2", FilesPerLevel(1));
// Compact all
MakeTables(1, "a", "z", 1);
ASSERT_EQ("1,0,2", FilesPerLevel(1));
CancelAllBackgroundWork(db_);
db_->CompactRange(CompactRangeOptions(), handles_[1], nullptr, nullptr);
ASSERT_EQ("1,0,2", FilesPerLevel(1));
if (iter == 0) {
options = CurrentOptions();
options.max_background_flushes = 0;
options.num_levels = 3;
options.create_if_missing = true;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
}
}
}
TEST_F(DBTest, PreShutdownFlush) {
Options options = CurrentOptions();
options.max_background_flushes = 0;
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "key", "value"));
CancelAllBackgroundWork(db_);
Status s =
db_->CompactRange(CompactRangeOptions(), handles_[1], nullptr, nullptr);
ASSERT_TRUE(s.IsShutdownInProgress());
}
TEST_P(DBTestWithParam, PreShutdownMultipleCompaction) {
const int kTestKeySize = 16;
const int kTestValueSize = 984;
const int kEntrySize = kTestKeySize + kTestValueSize;
const int kEntriesPerBuffer = 40;
const int kNumL0Files = 4;
const int kHighPriCount = 3;
const int kLowPriCount = 5;
env_->SetBackgroundThreads(kHighPriCount, Env::HIGH);
env_->SetBackgroundThreads(kLowPriCount, Env::LOW);
Options options;
options.create_if_missing = true;
options.write_buffer_size = kEntrySize * kEntriesPerBuffer;
options.compaction_style = kCompactionStyleLevel;
options.target_file_size_base = options.write_buffer_size;
options.max_bytes_for_level_base =
options.target_file_size_base * kNumL0Files;
options.compression = kNoCompression;
options = CurrentOptions(options);
options.env = env_;
options.enable_thread_tracking = true;
options.level0_file_num_compaction_trigger = kNumL0Files;
options.max_bytes_for_level_multiplier = 2;
options.max_background_compactions = kLowPriCount;
options.level0_stop_writes_trigger = 1 << 10;
options.level0_slowdown_writes_trigger = 1 << 10;
options.max_subcompactions = max_subcompactions_;
TryReopen(options);
Random rnd(301);
std::vector<ThreadStatus> thread_list;
// Delay both flush and compaction
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"FlushJob::FlushJob()", "CompactionJob::Run():Start"},
{"CompactionJob::Run():Start",
"DBTest::PreShutdownMultipleCompaction:Preshutdown"},
{"CompactionJob::Run():Start",
"DBTest::PreShutdownMultipleCompaction:VerifyCompaction"},
{"DBTest::PreShutdownMultipleCompaction:Preshutdown",
"CompactionJob::Run():End"},
{"CompactionJob::Run():End",
"DBTest::PreShutdownMultipleCompaction:VerifyPreshutdown"}});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// Make rocksdb busy
int key = 0;
// check how many threads are doing compaction using GetThreadList
int operation_count[ThreadStatus::NUM_OP_TYPES] = {0};
for (int file = 0; file < 16 * kNumL0Files; ++file) {
for (int k = 0; k < kEntriesPerBuffer; ++k) {
ASSERT_OK(Put(ToString(key++), RandomString(&rnd, kTestValueSize)));
}
Status s = env_->GetThreadList(&thread_list);
for (auto thread : thread_list) {
operation_count[thread.operation_type]++;
}
// Speed up the test
if (operation_count[ThreadStatus::OP_FLUSH] > 1 &&
operation_count[ThreadStatus::OP_COMPACTION] >
0.6 * options.max_background_compactions) {
break;
}
if (file == 15 * kNumL0Files) {
TEST_SYNC_POINT("DBTest::PreShutdownMultipleCompaction:Preshutdown");
}
}
TEST_SYNC_POINT("DBTest::PreShutdownMultipleCompaction:Preshutdown");
ASSERT_GE(operation_count[ThreadStatus::OP_COMPACTION], 1);
CancelAllBackgroundWork(db_);
TEST_SYNC_POINT("DBTest::PreShutdownMultipleCompaction:VerifyPreshutdown");
dbfull()->TEST_WaitForCompact();
// Record the number of compactions at a time.
for (int i = 0; i < ThreadStatus::NUM_OP_TYPES; ++i) {
operation_count[i] = 0;
}
Status s = env_->GetThreadList(&thread_list);
for (auto thread : thread_list) {
operation_count[thread.operation_type]++;
}
ASSERT_EQ(operation_count[ThreadStatus::OP_COMPACTION], 0);
}
TEST_P(DBTestWithParam, PreShutdownCompactionMiddle) {
const int kTestKeySize = 16;
const int kTestValueSize = 984;
const int kEntrySize = kTestKeySize + kTestValueSize;
const int kEntriesPerBuffer = 40;
const int kNumL0Files = 4;
const int kHighPriCount = 3;
const int kLowPriCount = 5;
env_->SetBackgroundThreads(kHighPriCount, Env::HIGH);
env_->SetBackgroundThreads(kLowPriCount, Env::LOW);
Options options;
options.create_if_missing = true;
options.write_buffer_size = kEntrySize * kEntriesPerBuffer;
options.compaction_style = kCompactionStyleLevel;
options.target_file_size_base = options.write_buffer_size;
options.max_bytes_for_level_base =
options.target_file_size_base * kNumL0Files;
options.compression = kNoCompression;
options = CurrentOptions(options);
options.env = env_;
options.enable_thread_tracking = true;
options.level0_file_num_compaction_trigger = kNumL0Files;
options.max_bytes_for_level_multiplier = 2;
options.max_background_compactions = kLowPriCount;
options.level0_stop_writes_trigger = 1 << 10;
options.level0_slowdown_writes_trigger = 1 << 10;
options.max_subcompactions = max_subcompactions_;
TryReopen(options);
Random rnd(301);
std::vector<ThreadStatus> thread_list;
// Delay both flush and compaction
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"DBTest::PreShutdownCompactionMiddle:Preshutdown",
"CompactionJob::Run():Inprogress"},
{"CompactionJob::Run():Start",
"DBTest::PreShutdownCompactionMiddle:VerifyCompaction"},
{"CompactionJob::Run():Inprogress", "CompactionJob::Run():End"},
{"CompactionJob::Run():End",
"DBTest::PreShutdownCompactionMiddle:VerifyPreshutdown"}});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// Make rocksdb busy
int key = 0;
// check how many threads are doing compaction using GetThreadList
int operation_count[ThreadStatus::NUM_OP_TYPES] = {0};
for (int file = 0; file < 16 * kNumL0Files; ++file) {
for (int k = 0; k < kEntriesPerBuffer; ++k) {
ASSERT_OK(Put(ToString(key++), RandomString(&rnd, kTestValueSize)));
}
Status s = env_->GetThreadList(&thread_list);
for (auto thread : thread_list) {
operation_count[thread.operation_type]++;
}
// Speed up the test
if (operation_count[ThreadStatus::OP_FLUSH] > 1 &&
operation_count[ThreadStatus::OP_COMPACTION] >
0.6 * options.max_background_compactions) {
break;
}
if (file == 15 * kNumL0Files) {
TEST_SYNC_POINT("DBTest::PreShutdownCompactionMiddle:VerifyCompaction");
}
}
ASSERT_GE(operation_count[ThreadStatus::OP_COMPACTION], 1);
CancelAllBackgroundWork(db_);
TEST_SYNC_POINT("DBTest::PreShutdownCompactionMiddle:Preshutdown");
TEST_SYNC_POINT("DBTest::PreShutdownCompactionMiddle:VerifyPreshutdown");
dbfull()->TEST_WaitForCompact();
// Record the number of compactions at a time.
for (int i = 0; i < ThreadStatus::NUM_OP_TYPES; ++i) {
operation_count[i] = 0;
}
Status s = env_->GetThreadList(&thread_list);
for (auto thread : thread_list) {
operation_count[thread.operation_type]++;
}
ASSERT_EQ(operation_count[ThreadStatus::OP_COMPACTION], 0);
}
#endif // ROCKSDB_USING_THREAD_STATUS
TEST_F(DBTest, FlushOnDestroy) {
WriteOptions wo;
wo.disableWAL = true;
ASSERT_OK(Put("foo", "v1", wo));
CancelAllBackgroundWork(db_);
}
namespace {
class OnFileDeletionListener : public EventListener {
public:
OnFileDeletionListener() :
matched_count_(0),
expected_file_name_("") {}
void SetExpectedFileName(
const std::string file_name) {
expected_file_name_ = file_name;
}
void VerifyMatchedCount(size_t expected_value) {
ASSERT_EQ(matched_count_, expected_value);
}
void OnTableFileDeleted(
const TableFileDeletionInfo& info) override {
if (expected_file_name_ != "") {
ASSERT_EQ(expected_file_name_, info.file_path);
expected_file_name_ = "";
matched_count_++;
}
}
private:
size_t matched_count_;
std::string expected_file_name_;
};
} // namespace
TEST_F(DBTest, DynamicLevelCompressionPerLevel) {
if (!Snappy_Supported()) {
return;
}
const int kNKeys = 120;
int keys[kNKeys];
for (int i = 0; i < kNKeys; i++) {
keys[i] = i;
}
std::random_shuffle(std::begin(keys), std::end(keys));
Random rnd(301);
Options options;
options.create_if_missing = true;
options.db_write_buffer_size = 20480;
options.write_buffer_size = 20480;
options.max_write_buffer_number = 2;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 2;
options.target_file_size_base = 2048;
options.level_compaction_dynamic_level_bytes = true;
options.max_bytes_for_level_base = 102400;
options.max_bytes_for_level_multiplier = 4;
options.max_background_compactions = 1;
options.num_levels = 5;
options.compression_per_level.resize(3);
options.compression_per_level[0] = kNoCompression;
options.compression_per_level[1] = kNoCompression;
options.compression_per_level[2] = kSnappyCompression;
OnFileDeletionListener* listener = new OnFileDeletionListener();
options.listeners.emplace_back(listener);
DestroyAndReopen(options);
// Insert more than 80K. L4 should be base level. Neither L0 nor L4 should
// be compressed, so total data size should be more than 80K.
for (int i = 0; i < 20; i++) {
ASSERT_OK(Put(Key(keys[i]), CompressibleString(&rnd, 4000)));
}
Flush();
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
ASSERT_EQ(NumTableFilesAtLevel(3), 0);
ASSERT_GT(SizeAtLevel(0) + SizeAtLevel(4), 20U * 4000U);
// Insert 400KB. Some data will be compressed
for (int i = 21; i < 120; i++) {
ASSERT_OK(Put(Key(keys[i]), CompressibleString(&rnd, 4000)));
}
Flush();
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
ASSERT_LT(SizeAtLevel(0) + SizeAtLevel(3) + SizeAtLevel(4), 120U * 4000U);
// Make sure data in files in L3 is not compacted by removing all files
// in L4 and calculate number of rows
ASSERT_OK(dbfull()->SetOptions({
{"disable_auto_compactions", "true"},
}));
ColumnFamilyMetaData cf_meta;
db_->GetColumnFamilyMetaData(&cf_meta);
for (auto file : cf_meta.levels[4].files) {
listener->SetExpectedFileName(dbname_ + file.name);
ASSERT_OK(dbfull()->DeleteFile(file.name));
}
listener->VerifyMatchedCount(cf_meta.levels[4].files.size());
int num_keys = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
num_keys++;
}
ASSERT_OK(iter->status());
ASSERT_GT(SizeAtLevel(0) + SizeAtLevel(3), num_keys * 4000U);
}
TEST_F(DBTest, DynamicLevelCompressionPerLevel2) {
if (!Snappy_Supported() || !LZ4_Supported() || !Zlib_Supported()) {
return;
}
const int kNKeys = 500;
int keys[kNKeys];
for (int i = 0; i < kNKeys; i++) {
keys[i] = i;
}
std::random_shuffle(std::begin(keys), std::end(keys));
Random rnd(301);
Options options;
options.create_if_missing = true;
options.db_write_buffer_size = 6000;
options.write_buffer_size = 6000;
options.max_write_buffer_number = 2;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 2;
options.soft_rate_limit = 1.1;
// Use file size to distinguish levels
// L1: 10, L2: 20, L3 40, L4 80
// L0 is less than 30
options.target_file_size_base = 10;
options.target_file_size_multiplier = 2;
options.level_compaction_dynamic_level_bytes = true;
options.max_bytes_for_level_base = 200;
options.max_bytes_for_level_multiplier = 8;
options.max_background_compactions = 1;
options.num_levels = 5;
std::shared_ptr<mock::MockTableFactory> mtf(new mock::MockTableFactory);
options.table_factory = mtf;
options.compression_per_level.resize(3);
options.compression_per_level[0] = kNoCompression;
options.compression_per_level[1] = kLZ4Compression;
options.compression_per_level[2] = kZlibCompression;
DestroyAndReopen(options);
// When base level is L4, L4 is LZ4.
std::atomic<int> num_zlib(0);
std::atomic<int> num_lz4(0);
std::atomic<int> num_no(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
if (compaction->output_level() == 4) {
ASSERT_TRUE(compaction->output_compression() == kLZ4Compression);
num_lz4.fetch_add(1);
}
});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"FlushJob::WriteLevel0Table:output_compression", [&](void* arg) {
auto* compression = reinterpret_cast<CompressionType*>(arg);
ASSERT_TRUE(*compression == kNoCompression);
num_no.fetch_add(1);
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(keys[i]), RandomString(&rnd, 200)));
}
Flush();
dbfull()->TEST_WaitForCompact();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
ASSERT_EQ(NumTableFilesAtLevel(3), 0);
ASSERT_GT(NumTableFilesAtLevel(4), 0);
ASSERT_GT(num_no.load(), 2);
ASSERT_GT(num_lz4.load(), 0);
int prev_num_files_l4 = NumTableFilesAtLevel(4);
// After base level turn L4->L3, L3 becomes LZ4 and L4 becomes Zlib
num_lz4.store(0);
num_no.store(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
if (compaction->output_level() == 4 && compaction->start_level() == 3) {
ASSERT_TRUE(compaction->output_compression() == kZlibCompression);
num_zlib.fetch_add(1);
} else {
ASSERT_TRUE(compaction->output_compression() == kLZ4Compression);
num_lz4.fetch_add(1);
}
});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"FlushJob::WriteLevel0Table:output_compression", [&](void* arg) {
auto* compression = reinterpret_cast<CompressionType*>(arg);
ASSERT_TRUE(*compression == kNoCompression);
num_no.fetch_add(1);
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
for (int i = 101; i < 500; i++) {
ASSERT_OK(Put(Key(keys[i]), RandomString(&rnd, 200)));
if (i % 100 == 99) {
Flush();
dbfull()->TEST_WaitForCompact();
}
}
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
ASSERT_GT(NumTableFilesAtLevel(3), 0);
ASSERT_GT(NumTableFilesAtLevel(4), prev_num_files_l4);
ASSERT_GT(num_no.load(), 2);
ASSERT_GT(num_lz4.load(), 0);
ASSERT_GT(num_zlib.load(), 0);
}
TEST_F(DBTest, DynamicCompactionOptions) {
// minimum write buffer size is enforced at 64KB
const uint64_t k32KB = 1 << 15;
const uint64_t k64KB = 1 << 16;
const uint64_t k128KB = 1 << 17;
const uint64_t k1MB = 1 << 20;
const uint64_t k4KB = 1 << 12;
Options options;
options.env = env_;
options.create_if_missing = true;
options.compression = kNoCompression;
options.soft_rate_limit = 1.1;
options.write_buffer_size = k64KB;
options.arena_block_size = 4 * k4KB;
options.max_write_buffer_number = 2;
// Compaction related options
options.level0_file_num_compaction_trigger = 3;
options.level0_slowdown_writes_trigger = 4;
options.level0_stop_writes_trigger = 8;
options.max_grandparent_overlap_factor = 10;
options.expanded_compaction_factor = 25;
options.source_compaction_factor = 1;
options.target_file_size_base = k64KB;
options.target_file_size_multiplier = 1;
options.max_bytes_for_level_base = k128KB;
options.max_bytes_for_level_multiplier = 4;
// Block flush thread and disable compaction thread
env_->SetBackgroundThreads(1, Env::LOW);
env_->SetBackgroundThreads(1, Env::HIGH);
DestroyAndReopen(options);
auto gen_l0_kb = [this](int start, int size, int stride) {
Random rnd(301);
for (int i = 0; i < size; i++) {
ASSERT_OK(Put(Key(start + stride * i), RandomString(&rnd, 1024)));
}
dbfull()->TEST_WaitForFlushMemTable();
};
// Write 3 files that have the same key range.
// Since level0_file_num_compaction_trigger is 3, compaction should be
// triggered. The compaction should result in one L1 file
gen_l0_kb(0, 64, 1);
ASSERT_EQ(NumTableFilesAtLevel(0), 1);
gen_l0_kb(0, 64, 1);
ASSERT_EQ(NumTableFilesAtLevel(0), 2);
gen_l0_kb(0, 64, 1);
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,1", FilesPerLevel());
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(1U, metadata.size());
ASSERT_LE(metadata[0].size, k64KB + k4KB);
ASSERT_GE(metadata[0].size, k64KB - k4KB);
// Test compaction trigger and target_file_size_base
// Reduce compaction trigger to 2, and reduce L1 file size to 32KB.
// Writing to 64KB L0 files should trigger a compaction. Since these
// 2 L0 files have the same key range, compaction merge them and should
// result in 2 32KB L1 files.
ASSERT_OK(dbfull()->SetOptions({
{"level0_file_num_compaction_trigger", "2"},
{"target_file_size_base", ToString(k32KB) }
}));
gen_l0_kb(0, 64, 1);
ASSERT_EQ("1,1", FilesPerLevel());
gen_l0_kb(0, 64, 1);
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,2", FilesPerLevel());
metadata.clear();
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(2U, metadata.size());
ASSERT_LE(metadata[0].size, k32KB + k4KB);
ASSERT_GE(metadata[0].size, k32KB - k4KB);
ASSERT_LE(metadata[1].size, k32KB + k4KB);
ASSERT_GE(metadata[1].size, k32KB - k4KB);
// Test max_bytes_for_level_base
// Increase level base size to 256KB and write enough data that will
// fill L1 and L2. L1 size should be around 256KB while L2 size should be
// around 256KB x 4.
ASSERT_OK(dbfull()->SetOptions({
{"max_bytes_for_level_base", ToString(k1MB) }
}));
// writing 96 x 64KB => 6 * 1024KB
// (L1 + L2) = (1 + 4) * 1024KB
for (int i = 0; i < 96; ++i) {
gen_l0_kb(i, 64, 96);
}
dbfull()->TEST_WaitForCompact();
ASSERT_GT(SizeAtLevel(1), k1MB / 2);
ASSERT_LT(SizeAtLevel(1), k1MB + k1MB / 2);
// Within (0.5, 1.5) of 4MB.
ASSERT_GT(SizeAtLevel(2), 2 * k1MB);
ASSERT_LT(SizeAtLevel(2), 6 * k1MB);
// Test max_bytes_for_level_multiplier and
// max_bytes_for_level_base. Now, reduce both mulitplier and level base,
// After filling enough data that can fit in L1 - L3, we should see L1 size
// reduces to 128KB from 256KB which was asserted previously. Same for L2.
ASSERT_OK(dbfull()->SetOptions({
{"max_bytes_for_level_multiplier", "2"},
{"max_bytes_for_level_base", ToString(k128KB) }
}));
// writing 20 x 64KB = 10 x 128KB
// (L1 + L2 + L3) = (1 + 2 + 4) * 128KB
for (int i = 0; i < 20; ++i) {
gen_l0_kb(i, 64, 32);
}
dbfull()->TEST_WaitForCompact();
uint64_t total_size =
SizeAtLevel(1) + SizeAtLevel(2) + SizeAtLevel(3);
ASSERT_TRUE(total_size < k128KB * 7 * 1.5);
// Test level0_stop_writes_trigger.
// Clean up memtable and L0. Block compaction threads. If continue to write
// and flush memtables. We should see put stop after 8 memtable flushes
// since level0_stop_writes_trigger = 8
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
// Block compaction
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DelayWrite:Wait",
[&](void* arg) { sleeping_task_low.WakeUp(); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
int count = 0;
Random rnd(301);
WriteOptions wo;
while (count < 64) {
ASSERT_OK(Put(Key(count), RandomString(&rnd, 1024), wo));
if (sleeping_task_low.WokenUp()) {
break;
}
dbfull()->TEST_FlushMemTable(true);
count++;
}
// Stop trigger = 8
ASSERT_EQ(count, 8);
// Unblock
sleeping_task_low.WaitUntilDone();
// Now reduce level0_stop_writes_trigger to 6. Clear up memtables and L0.
// Block compaction thread again. Perform the put and memtable flushes
// until we see the stop after 6 memtable flushes.
ASSERT_OK(dbfull()->SetOptions({
{"level0_stop_writes_trigger", "6"}
}));
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
// Block compaction again
sleeping_task_low.Reset();
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
count = 0;
while (count < 64) {
ASSERT_OK(Put(Key(count), RandomString(&rnd, 1024), wo));
if (sleeping_task_low.WokenUp()) {
break;
}
dbfull()->TEST_FlushMemTable(true);
count++;
}
ASSERT_EQ(count, 6);
// Unblock
sleeping_task_low.WaitUntilDone();
// Test disable_auto_compactions
// Compaction thread is unblocked but auto compaction is disabled. Write
// 4 L0 files and compaction should be triggered. If auto compaction is
// disabled, then TEST_WaitForCompact will be waiting for nothing. Number of
// L0 files do not change after the call.
ASSERT_OK(dbfull()->SetOptions({
{"disable_auto_compactions", "true"}
}));
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
for (int i = 0; i < 4; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
// Wait for compaction so that put won't stop
dbfull()->TEST_FlushMemTable(true);
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0), 4);
// Enable auto compaction and perform the same test, # of L0 files should be
// reduced after compaction.
ASSERT_OK(dbfull()->SetOptions({
{"disable_auto_compactions", "false"}
}));
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
for (int i = 0; i < 4; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
// Wait for compaction so that put won't stop
dbfull()->TEST_FlushMemTable(true);
}
dbfull()->TEST_WaitForCompact();
ASSERT_LT(NumTableFilesAtLevel(0), 4);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, FileCreationRandomFailure) {
Options options;
options.env = env_;
options.create_if_missing = true;
options.write_buffer_size = 100000; // Small write buffer
options.target_file_size_base = 200000;
options.max_bytes_for_level_base = 1000000;
options.max_bytes_for_level_multiplier = 2;
DestroyAndReopen(options);
Random rnd(301);
const int kCDTKeysPerBuffer = 4;
const int kTestSize = kCDTKeysPerBuffer * 4096;
const int kTotalIteration = 100;
// the second half of the test involves in random failure
// of file creation.
const int kRandomFailureTest = kTotalIteration / 2;
std::vector<std::string> values;
for (int i = 0; i < kTestSize; ++i) {
values.push_back("NOT_FOUND");
}
for (int j = 0; j < kTotalIteration; ++j) {
if (j == kRandomFailureTest) {
env_->non_writeable_rate_.store(90);
}
for (int k = 0; k < kTestSize; ++k) {
// here we expect some of the Put fails.
std::string value = RandomString(&rnd, 100);
Status s = Put(Key(k), Slice(value));
if (s.ok()) {
// update the latest successful put
values[k] = value;
}
// But everything before we simulate the failure-test should succeed.
if (j < kRandomFailureTest) {
ASSERT_OK(s);
}
}
}
// If rocksdb does not do the correct job, internal assert will fail here.
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
// verify we have the latest successful update
for (int k = 0; k < kTestSize; ++k) {
auto v = Get(Key(k));
ASSERT_EQ(v, values[k]);
}
// reopen and reverify we have the latest successful update
env_->non_writeable_rate_.store(0);
Reopen(options);
for (int k = 0; k < kTestSize; ++k) {
auto v = Get(Key(k));
ASSERT_EQ(v, values[k]);
}
}
TEST_F(DBTest, DynamicMiscOptions) {
// Test max_sequential_skip_in_iterations
Options options;
options.env = env_;
options.create_if_missing = true;
options.max_sequential_skip_in_iterations = 16;
options.compression = kNoCompression;
options.statistics = rocksdb::CreateDBStatistics();
DestroyAndReopen(options);
auto assert_reseek_count = [this, &options](int key_start, int num_reseek) {
int key0 = key_start;
int key1 = key_start + 1;
int key2 = key_start + 2;
Random rnd(301);
ASSERT_OK(Put(Key(key0), RandomString(&rnd, 8)));
for (int i = 0; i < 10; ++i) {
ASSERT_OK(Put(Key(key1), RandomString(&rnd, 8)));
}
ASSERT_OK(Put(Key(key2), RandomString(&rnd, 8)));
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
iter->Seek(Key(key1));
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Key(key1)), 0);
iter->Next();
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(iter->key().compare(Key(key2)), 0);
ASSERT_EQ(num_reseek,
TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION));
};
// No reseek
assert_reseek_count(100, 0);
ASSERT_OK(dbfull()->SetOptions({
{"max_sequential_skip_in_iterations", "4"}
}));
// Clear memtable and make new option effective
dbfull()->TEST_FlushMemTable(true);
// Trigger reseek
assert_reseek_count(200, 1);
ASSERT_OK(dbfull()->SetOptions({
{"max_sequential_skip_in_iterations", "16"}
}));
// Clear memtable and make new option effective
dbfull()->TEST_FlushMemTable(true);
// No reseek
assert_reseek_count(300, 1);
}
TEST_F(DBTest, DontDeletePendingOutputs) {
Options options;
options.env = env_;
options.create_if_missing = true;
DestroyAndReopen(options);
// Every time we write to a table file, call FOF/POF with full DB scan. This
// will make sure our pending_outputs_ protection work correctly
std::function<void()> purge_obsolete_files_function = [&]() {
JobContext job_context(0);
dbfull()->TEST_LockMutex();
dbfull()->FindObsoleteFiles(&job_context, true /*force*/);
dbfull()->TEST_UnlockMutex();
dbfull()->PurgeObsoleteFiles(job_context);
job_context.Clean();
};
env_->table_write_callback_ = &purge_obsolete_files_function;
for (int i = 0; i < 2; ++i) {
ASSERT_OK(Put("a", "begin"));
ASSERT_OK(Put("z", "end"));
ASSERT_OK(Flush());
}
// If pending output guard does not work correctly, PurgeObsoleteFiles() will
// delete the file that Compaction is trying to create, causing this: error
// db/db_test.cc:975: IO error:
// /tmp/rocksdbtest-1552237650/db_test/000009.sst: No such file or directory
Compact("a", "b");
}
TEST_F(DBTest, DontDeleteMovedFile) {
// This test triggers move compaction and verifies that the file is not
// deleted when it's part of move compaction
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.max_bytes_for_level_base = 1024 * 1024; // 1 MB
options.level0_file_num_compaction_trigger =
2; // trigger compaction when we have 2 files
DestroyAndReopen(options);
Random rnd(301);
// Create two 1MB sst files
for (int i = 0; i < 2; ++i) {
// Create 1MB sst file
for (int j = 0; j < 100; ++j) {
ASSERT_OK(Put(Key(i * 50 + j), RandomString(&rnd, 10 * 1024)));
}
ASSERT_OK(Flush());
}
// this should execute both L0->L1 and L1->(move)->L2 compactions
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1", FilesPerLevel(0));
// If the moved file is actually deleted (the move-safeguard in
// ~Version::Version() is not there), we get this failure:
// Corruption: Can't access /000009.sst
Reopen(options);
}
TEST_F(DBTest, OptimizeFiltersForHits) {
Options options = CurrentOptions();
options.write_buffer_size = 64 * 1024;
options.arena_block_size = 4 * 1024;
options.target_file_size_base = 64 * 1024;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 4;
options.max_bytes_for_level_base = 256 * 1024;
options.max_write_buffer_number = 2;
options.max_background_compactions = 8;
options.max_background_flushes = 8;
options.compression = kNoCompression;
options.compaction_style = kCompactionStyleLevel;
options.level_compaction_dynamic_level_bytes = true;
BlockBasedTableOptions bbto;
bbto.filter_policy.reset(NewBloomFilterPolicy(10, true));
bbto.whole_key_filtering = true;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
options.optimize_filters_for_hits = true;
options.statistics = rocksdb::CreateDBStatistics();
CreateAndReopenWithCF({"mypikachu"}, options);
int numkeys = 200000;
// Generate randomly shuffled keys, so the updates are almost
// random.
std::vector<int> keys;
keys.reserve(numkeys);
for (int i = 0; i < numkeys; i += 2) {
keys.push_back(i);
}
std::random_shuffle(std::begin(keys), std::end(keys));
int num_inserted = 0;
for (int key : keys) {
ASSERT_OK(Put(1, Key(key), "val"));
if (++num_inserted % 1000 == 0) {
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
}
}
ASSERT_OK(Put(1, Key(0), "val"));
ASSERT_OK(Put(1, Key(numkeys), "val"));
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
if (NumTableFilesAtLevel(0, 1) == 0) {
// No Level 0 file. Create one.
ASSERT_OK(Put(1, Key(0), "val"));
ASSERT_OK(Put(1, Key(numkeys), "val"));
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
}
for (int i = 1; i < numkeys; i += 2) {
ASSERT_EQ(Get(1, Key(i)), "NOT_FOUND");
}
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L0));
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L1));
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L2_AND_UP));
// Now we have three sorted run, L0, L5 and L6 with most files in L6 have
// no blooom filter. Most keys be checked bloom filters twice.
ASSERT_GT(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 65000 * 2);
ASSERT_LT(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 120000 * 2);
for (int i = 0; i < numkeys; i += 2) {
ASSERT_EQ(Get(1, Key(i)), "val");
}
}
TEST_F(DBTest, L0L1L2AndUpHitCounter) {
Options options = CurrentOptions();
options.write_buffer_size = 32 * 1024;
options.target_file_size_base = 32 * 1024;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 4;
options.max_bytes_for_level_base = 64 * 1024;
options.max_write_buffer_number = 2;
options.max_background_compactions = 8;
options.max_background_flushes = 8;
options.statistics = rocksdb::CreateDBStatistics();
CreateAndReopenWithCF({"mypikachu"}, options);
int numkeys = 20000;
for (int i = 0; i < numkeys; i++) {
ASSERT_OK(Put(1, Key(i), "val"));
}
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L0));
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L1));
ASSERT_EQ(0, TestGetTickerCount(options, GET_HIT_L2_AND_UP));
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
for (int i = 0; i < numkeys; i++) {
ASSERT_EQ(Get(1, Key(i)), "val");
}
ASSERT_GT(TestGetTickerCount(options, GET_HIT_L0), 100);
ASSERT_GT(TestGetTickerCount(options, GET_HIT_L1), 100);
ASSERT_GT(TestGetTickerCount(options, GET_HIT_L2_AND_UP), 100);
ASSERT_EQ(numkeys, TestGetTickerCount(options, GET_HIT_L0) +
TestGetTickerCount(options, GET_HIT_L1) +
TestGetTickerCount(options, GET_HIT_L2_AND_UP));
}
TEST_F(DBTest, EncodeDecompressedBlockSizeTest) {
// iter 0 -- zlib
// iter 1 -- bzip2
// iter 2 -- lz4
// iter 3 -- lz4HC
CompressionType compressions[] = {kZlibCompression, kBZip2Compression,
kLZ4Compression, kLZ4HCCompression};
for (int iter = 0; iter < 4; ++iter) {
if (!CompressionTypeSupported(compressions[iter])) {
continue;
}
// first_table_version 1 -- generate with table_version == 1, read with
// table_version == 2
// first_table_version 2 -- generate with table_version == 2, read with
// table_version == 1
for (int first_table_version = 1; first_table_version <= 2;
++first_table_version) {
BlockBasedTableOptions table_options;
table_options.format_version = first_table_version;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
Options options = CurrentOptions();
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.create_if_missing = true;
options.compression = compressions[iter];
DestroyAndReopen(options);
int kNumKeysWritten = 100000;
Random rnd(301);
for (int i = 0; i < kNumKeysWritten; ++i) {
// compressible string
ASSERT_OK(Put(Key(i), RandomString(&rnd, 128) + std::string(128, 'a')));
}
table_options.format_version = first_table_version == 1 ? 2 : 1;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
for (int i = 0; i < kNumKeysWritten; ++i) {
auto r = Get(Key(i));
ASSERT_EQ(r.substr(128), std::string(128, 'a'));
}
}
}
}
TEST_F(DBTest, MutexWaitStats) {
Options options = CurrentOptions();
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
CreateAndReopenWithCF({"pikachu"}, options);
const int64_t kMutexWaitDelay = 100;
ThreadStatusUtil::TEST_SetStateDelay(
ThreadStatus::STATE_MUTEX_WAIT, kMutexWaitDelay);
ASSERT_OK(Put("hello", "rocksdb"));
ASSERT_GE(TestGetTickerCount(
options, DB_MUTEX_WAIT_MICROS), kMutexWaitDelay);
ThreadStatusUtil::TEST_SetStateDelay(
ThreadStatus::STATE_MUTEX_WAIT, 0);
}
// This reproduces a bug where we don't delete a file because when it was
// supposed to be deleted, it was blocked by pending_outputs
// Consider:
// 1. current file_number is 13
// 2. compaction (1) starts, blocks deletion of all files starting with 13
// (pending outputs)
// 3. file 13 is created by compaction (2)
// 4. file 13 is consumed by compaction (3) and file 15 was created. Since file
// 13 has no references, it is put into VersionSet::obsolete_files_
// 5. FindObsoleteFiles() gets file 13 from VersionSet::obsolete_files_. File 13
// is deleted from obsolete_files_ set.
// 6. PurgeObsoleteFiles() tries to delete file 13, but this file is blocked by
// pending outputs since compaction (1) is still running. It is not deleted and
// it is not present in obsolete_files_ anymore. Therefore, we never delete it.
TEST_F(DBTest, DeleteObsoleteFilesPendingOutputs) {
Options options = CurrentOptions();
options.env = env_;
options.write_buffer_size = 2 * 1024 * 1024; // 2 MB
options.max_bytes_for_level_base = 1024 * 1024; // 1 MB
options.level0_file_num_compaction_trigger =
2; // trigger compaction when we have 2 files
options.max_background_flushes = 2;
options.max_background_compactions = 2;
OnFileDeletionListener* listener = new OnFileDeletionListener();
options.listeners.emplace_back(listener);
Reopen(options);
Random rnd(301);
// Create two 1MB sst files
for (int i = 0; i < 2; ++i) {
// Create 1MB sst file
for (int j = 0; j < 100; ++j) {
ASSERT_OK(Put(Key(i * 50 + j), RandomString(&rnd, 10 * 1024)));
}
ASSERT_OK(Flush());
}
// this should execute both L0->L1 and L1->(move)->L2 compactions
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1", FilesPerLevel(0));
test::SleepingBackgroundTask blocking_thread;
port::Mutex mutex_;
bool already_blocked(false);
// block the flush
std::function<void()> block_first_time = [&]() {
bool blocking = false;
{
MutexLock l(&mutex_);
if (!already_blocked) {
blocking = true;
already_blocked = true;
}
}
if (blocking) {
blocking_thread.DoSleep();
}
};
env_->table_write_callback_ = &block_first_time;
// Create 1MB sst file
for (int j = 0; j < 256; ++j) {
ASSERT_OK(Put(Key(j), RandomString(&rnd, 10 * 1024)));
}
// this should trigger a flush, which is blocked with block_first_time
// pending_file is protecting all the files created after
ASSERT_OK(dbfull()->TEST_CompactRange(2, nullptr, nullptr));
ASSERT_EQ("0,0,0,1", FilesPerLevel(0));
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 1U);
auto file_on_L2 = metadata[0].name;
listener->SetExpectedFileName(dbname_ + file_on_L2);
ASSERT_OK(dbfull()->TEST_CompactRange(3, nullptr, nullptr, nullptr,
true /* disallow trivial move */));
ASSERT_EQ("0,0,0,0,1", FilesPerLevel(0));
// finish the flush!
blocking_thread.WakeUp();
blocking_thread.WaitUntilDone();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ("1,0,0,0,1", FilesPerLevel(0));
metadata.clear();
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 2U);
// This file should have been deleted during last compaction
ASSERT_EQ(Status::NotFound(), env_->FileExists(dbname_ + file_on_L2));
listener->VerifyMatchedCount(1);
}
TEST_F(DBTest, CloseSpeedup) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 2;
options.num_levels = 4;
options.max_bytes_for_level_base = 400 * 1024;
options.max_write_buffer_number = 16;
// Block background threads
env_->SetBackgroundThreads(1, Env::LOW);
env_->SetBackgroundThreads(1, Env::HIGH);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
test::SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_task_high, Env::Priority::HIGH);
std::vector<std::string> filenames;
env_->GetChildren(dbname_, &filenames);
// Delete archival files.
for (size_t i = 0; i < filenames.size(); ++i) {
env_->DeleteFile(dbname_ + "/" + filenames[i]);
}
env_->DeleteDir(dbname_);
DestroyAndReopen(options);
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
env_->SetBackgroundThreads(1, Env::LOW);
env_->SetBackgroundThreads(1, Env::HIGH);
Random rnd(301);
int key_idx = 0;
// First three 110KB files are not going to level 2
// After that, (100K, 200K)
for (int num = 0; num < 5; num++) {
GenerateNewFile(&rnd, &key_idx, true);
}
ASSERT_EQ(0, GetSstFileCount(dbname_));
Close();
ASSERT_EQ(0, GetSstFileCount(dbname_));
// Unblock background threads
sleeping_task_high.WakeUp();
sleeping_task_high.WaitUntilDone();
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
Destroy(options);
}
class DelayedMergeOperator : public AssociativeMergeOperator {
private:
DBTest* db_test_;
public:
explicit DelayedMergeOperator(DBTest* d) : db_test_(d) {}
virtual bool Merge(const Slice& key, const Slice* existing_value,
const Slice& value, std::string* new_value,
Logger* logger) const override {
db_test_->env_->addon_time_.fetch_add(1000);
return true;
}
virtual const char* Name() const override { return "DelayedMergeOperator"; }
};
TEST_F(DBTest, MergeTestTime) {
std::string one, two, three;
PutFixed64(&one, 1);
PutFixed64(&two, 2);
PutFixed64(&three, 3);
// Enable time profiling
SetPerfLevel(kEnableTime);
this->env_->addon_time_.store(0);
Options options;
options = CurrentOptions(options);
options.statistics = rocksdb::CreateDBStatistics();
options.merge_operator.reset(new DelayedMergeOperator(this));
DestroyAndReopen(options);
ASSERT_EQ(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 0);
db_->Put(WriteOptions(), "foo", one);
ASSERT_OK(Flush());
ASSERT_OK(db_->Merge(WriteOptions(), "foo", two));
ASSERT_OK(Flush());
ASSERT_OK(db_->Merge(WriteOptions(), "foo", three));
ASSERT_OK(Flush());
ReadOptions opt;
opt.verify_checksums = true;
opt.snapshot = nullptr;
std::string result;
db_->Get(opt, "foo", &result);
ASSERT_LT(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 2800000);
ASSERT_GT(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 1200000);
ReadOptions read_options;
std::unique_ptr<Iterator> iter(db_->NewIterator(read_options));
int count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ASSERT_OK(iter->status());
++count;
}
ASSERT_EQ(1, count);
ASSERT_LT(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 6000000);
ASSERT_GT(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 3200000);
}
TEST_P(DBTestWithParam, MergeCompactionTimeTest) {
SetPerfLevel(kEnableTime);
Options options;
options = CurrentOptions(options);
options.compaction_filter_factory = std::make_shared<KeepFilterFactory>();
options.statistics = rocksdb::CreateDBStatistics();
options.merge_operator.reset(new DelayedMergeOperator(this));
options.compaction_style = kCompactionStyleUniversal;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
for (int i = 0; i < 1000; i++) {
ASSERT_OK(db_->Merge(WriteOptions(), "foo", "TEST"));
ASSERT_OK(Flush());
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
ASSERT_NE(TestGetTickerCount(options, MERGE_OPERATION_TOTAL_TIME), 0);
}
TEST_P(DBTestWithParam, FilterCompactionTimeTest) {
Options options;
options.compaction_filter_factory =
std::make_shared<DelayFilterFactory>(this);
options.disable_auto_compactions = true;
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
options.max_subcompactions = max_subcompactions_;
options = CurrentOptions(options);
DestroyAndReopen(options);
// put some data
for (int table = 0; table < 4; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(ToString(table * 100 + i), "val");
}
Flush();
}
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ(0U, CountLiveFiles());
Reopen(options);
Iterator* itr = db_->NewIterator(ReadOptions());
itr->SeekToFirst();
ASSERT_NE(TestGetTickerCount(options, FILTER_OPERATION_TOTAL_TIME), 0);
delete itr;
}
TEST_F(DBTest, TestLogCleanup) {
Options options = CurrentOptions();
options.write_buffer_size = 64 * 1024; // very small
// only two memtables allowed ==> only two log files
options.max_write_buffer_number = 2;
Reopen(options);
for (int i = 0; i < 100000; ++i) {
Put(Key(i), "val");
// only 2 memtables will be alive, so logs_to_free needs to always be below
// 2
ASSERT_LT(dbfull()->TEST_LogsToFreeSize(), static_cast<size_t>(3));
}
}
TEST_F(DBTest, EmptyCompactedDB) {
Options options;
options.max_open_files = -1;
options = CurrentOptions(options);
Close();
ASSERT_OK(ReadOnlyReopen(options));
Status s = Put("new", "value");
ASSERT_TRUE(s.IsNotSupported());
Close();
}
class CountingDeleteTabPropCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return "CountingDeleteTabPropCollector"; }
Status AddUserKey(const Slice& user_key, const Slice& value, EntryType type,
SequenceNumber seq, uint64_t file_size) override {
if (type == kEntryDelete) {
num_deletes_++;
}
return Status::OK();
}
bool NeedCompact() const override { return num_deletes_ > 10; }
UserCollectedProperties GetReadableProperties() const override {
return UserCollectedProperties{};
}
Status Finish(UserCollectedProperties* properties) override {
*properties =
UserCollectedProperties{{"num_delete", ToString(num_deletes_)}};
return Status::OK();
}
private:
uint32_t num_deletes_ = 0;
};
class CountingDeleteTabPropCollectorFactory
: public TablePropertiesCollectorFactory {
public:
virtual TablePropertiesCollector* CreateTablePropertiesCollector() override {
return new CountingDeleteTabPropCollector();
}
const char* Name() const override {
return "CountingDeleteTabPropCollectorFactory";
}
};
TEST_F(DBTest, TablePropertiesNeedCompactTest) {
Random rnd(301);
Options options;
options.create_if_missing = true;
options.write_buffer_size = 4096;
options.max_write_buffer_number = 8;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 4;
options.target_file_size_base = 2048;
options.max_bytes_for_level_base = 10240;
options.max_bytes_for_level_multiplier = 4;
options.soft_rate_limit = 1.1;
options.num_levels = 8;
std::shared_ptr<TablePropertiesCollectorFactory> collector_factory(
new CountingDeleteTabPropCollectorFactory);
options.table_properties_collector_factories.resize(1);
options.table_properties_collector_factories[0] = collector_factory;
DestroyAndReopen(options);
const int kMaxKey = 1000;
for (int i = 0; i < kMaxKey; i++) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 102)));
ASSERT_OK(Put(Key(kMaxKey + i), RandomString(&rnd, 102)));
}
Flush();
dbfull()->TEST_WaitForCompact();
if (NumTableFilesAtLevel(0) == 1) {
// Clear Level 0 so that when later flush a file with deletions,
// we don't trigger an organic compaction.
ASSERT_OK(Put(Key(0), ""));
ASSERT_OK(Put(Key(kMaxKey * 2), ""));
Flush();
dbfull()->TEST_WaitForCompact();
}
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
{
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
iter->Seek(Key(kMaxKey - 100));
while (iter->Valid() && iter->key().compare(Key(kMaxKey + 100)) < 0) {
iter->Next();
++c;
}
ASSERT_EQ(c, 200);
}
Delete(Key(0));
for (int i = kMaxKey - 100; i < kMaxKey + 100; i++) {
Delete(Key(i));
}
Delete(Key(kMaxKey * 2));
Flush();
dbfull()->TEST_WaitForCompact();
{
SetPerfLevel(kEnableCount);
perf_context.Reset();
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
iter->Seek(Key(kMaxKey - 100));
while (iter->Valid() && iter->key().compare(Key(kMaxKey + 100)) < 0) {
iter->Next();
}
ASSERT_EQ(c, 0);
ASSERT_LT(perf_context.internal_delete_skipped_count, 30u);
ASSERT_LT(perf_context.internal_key_skipped_count, 30u);
SetPerfLevel(kDisable);
}
}
TEST_F(DBTest, SuggestCompactRangeTest) {
class CompactionFilterFactoryGetContext : public CompactionFilterFactory {
public:
virtual std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context& context) override {
saved_context = context;
std::unique_ptr<CompactionFilter> empty_filter;
return empty_filter;
}
const char* Name() const override {
return "CompactionFilterFactoryGetContext";
}
static bool IsManual(CompactionFilterFactory* compaction_filter_factory) {
return reinterpret_cast<CompactionFilterFactoryGetContext*>(
compaction_filter_factory)->saved_context.is_manual_compaction;
}
CompactionFilter::Context saved_context;
};
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.compaction_filter_factory.reset(
new CompactionFilterFactoryGetContext());
options.write_buffer_size = 100 << 10;
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 4;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 450 << 10;
options.target_file_size_base = 98 << 10;
options.max_grandparent_overlap_factor = 1 << 20; // inf
Reopen(options);
Random rnd(301);
for (int num = 0; num < 3; num++) {
GenerateNewRandomFile(&rnd);
}
GenerateNewRandomFile(&rnd);
ASSERT_EQ("0,4", FilesPerLevel(0));
ASSERT_TRUE(!CompactionFilterFactoryGetContext::IsManual(
options.compaction_filter_factory.get()));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("1,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("2,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("3,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("0,4,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("1,4,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("2,4,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("3,4,4", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("0,4,8", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("1,4,8", FilesPerLevel(0));
// compact it three times
for (int i = 0; i < 3; ++i) {
ASSERT_OK(experimental::SuggestCompactRange(db_, nullptr, nullptr));
dbfull()->TEST_WaitForCompact();
}
ASSERT_EQ("0,0,13", FilesPerLevel(0));
GenerateNewRandomFile(&rnd);
ASSERT_EQ("1,0,13", FilesPerLevel(0));
// nonoverlapping with the file on level 0
Slice start("a"), end("b");
ASSERT_OK(experimental::SuggestCompactRange(db_, &start, &end));
dbfull()->TEST_WaitForCompact();
// should not compact the level 0 file
ASSERT_EQ("1,0,13", FilesPerLevel(0));
start = Slice("j");
end = Slice("m");
ASSERT_OK(experimental::SuggestCompactRange(db_, &start, &end));
dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(CompactionFilterFactoryGetContext::IsManual(
options.compaction_filter_factory.get()));
// now it should compact the level 0 file
ASSERT_EQ("0,1,13", FilesPerLevel(0));
}
TEST_F(DBTest, PromoteL0) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.write_buffer_size = 10 * 1024 * 1024;
DestroyAndReopen(options);
// non overlapping ranges
std::vector<std::pair<int32_t, int32_t>> ranges = {
{81, 160}, {0, 80}, {161, 240}, {241, 320}};
int32_t value_size = 10 * 1024; // 10 KB
Random rnd(301);
std::map<int32_t, std::string> values;
for (const auto& range : ranges) {
for (int32_t j = range.first; j < range.second; j++) {
values[j] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(j), values[j]));
}
ASSERT_OK(Flush());
}
int32_t level0_files = NumTableFilesAtLevel(0, 0);
ASSERT_EQ(level0_files, ranges.size());
ASSERT_EQ(NumTableFilesAtLevel(1, 0), 0); // No files in L1
// Promote L0 level to L2.
ASSERT_OK(experimental::PromoteL0(db_, db_->DefaultColumnFamily(), 2));
// We expect that all the files were trivially moved from L0 to L2
ASSERT_EQ(NumTableFilesAtLevel(0, 0), 0);
ASSERT_EQ(NumTableFilesAtLevel(2, 0), level0_files);
for (const auto& kv : values) {
ASSERT_EQ(Get(Key(kv.first)), kv.second);
}
}
TEST_F(DBTest, PromoteL0Failure) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.write_buffer_size = 10 * 1024 * 1024;
DestroyAndReopen(options);
// Produce two L0 files with overlapping ranges.
ASSERT_OK(Put(Key(0), ""));
ASSERT_OK(Put(Key(3), ""));
ASSERT_OK(Flush());
ASSERT_OK(Put(Key(1), ""));
ASSERT_OK(Flush());
Status status;
// Fails because L0 has overlapping files.
status = experimental::PromoteL0(db_, db_->DefaultColumnFamily());
ASSERT_TRUE(status.IsInvalidArgument());
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
// Now there is a file in L1.
ASSERT_GE(NumTableFilesAtLevel(1, 0), 1);
ASSERT_OK(Put(Key(5), ""));
ASSERT_OK(Flush());
// Fails because L1 is non-empty.
status = experimental::PromoteL0(db_, db_->DefaultColumnFamily());
ASSERT_TRUE(status.IsInvalidArgument());
}
// Github issue #596
TEST_F(DBTest, HugeNumberOfLevels) {
Options options = CurrentOptions();
options.write_buffer_size = 2 * 1024 * 1024; // 2MB
options.max_bytes_for_level_base = 2 * 1024 * 1024; // 2MB
options.num_levels = 12;
options.max_background_compactions = 10;
options.max_bytes_for_level_multiplier = 2;
options.level_compaction_dynamic_level_bytes = true;
DestroyAndReopen(options);
Random rnd(301);
for (int i = 0; i < 300000; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
}
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
}
// Github issue #595
// Large write batch with column families
TEST_F(DBTest, LargeBatchWithColumnFamilies) {
Options options;
options.env = env_;
options = CurrentOptions(options);
options.write_buffer_size = 100000; // Small write buffer
CreateAndReopenWithCF({"pikachu"}, options);
int64_t j = 0;
for (int i = 0; i < 5; i++) {
for (int pass = 1; pass <= 3; pass++) {
WriteBatch batch;
size_t write_size = 1024 * 1024 * (5 + i);
fprintf(stderr, "prepare: %ld MB, pass:%d\n", (write_size / 1024 / 1024),
pass);
for (;;) {
std::string data(3000, j++ % 127 + 20);
data += ToString(j);
batch.Put(handles_[0], Slice(data), Slice(data));
if (batch.GetDataSize() > write_size) {
break;
}
}
fprintf(stderr, "write: %ld MB\n", (batch.GetDataSize() / 1024 / 1024));
ASSERT_OK(dbfull()->Write(WriteOptions(), &batch));
fprintf(stderr, "done\n");
}
}
// make sure we can re-open it.
ASSERT_OK(TryReopenWithColumnFamilies({"default", "pikachu"}, options));
}
// Make sure that Flushes can proceed in parallel with CompactRange()
TEST_F(DBTest, FlushesInParallelWithCompactRange) {
// iter == 0 -- leveled
// iter == 1 -- leveled, but throw in a flush between two levels compacting
// iter == 2 -- universal
for (int iter = 0; iter < 3; ++iter) {
Options options = CurrentOptions();
if (iter < 2) {
options.compaction_style = kCompactionStyleLevel;
} else {
options.compaction_style = kCompactionStyleUniversal;
}
options.write_buffer_size = 110 << 10;
options.level0_file_num_compaction_trigger = 4;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 450 << 10;
options.target_file_size_base = 98 << 10;
options.max_write_buffer_number = 2;
DestroyAndReopen(options);
Random rnd(301);
for (int num = 0; num < 14; num++) {
GenerateNewRandomFile(&rnd);
}
if (iter == 1) {
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::RunManualCompaction()::1",
"DBTest::FlushesInParallelWithCompactRange:1"},
{"DBTest::FlushesInParallelWithCompactRange:2",
"DBImpl::RunManualCompaction()::2"}});
} else {
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"CompactionJob::Run():Start",
"DBTest::FlushesInParallelWithCompactRange:1"},
{"DBTest::FlushesInParallelWithCompactRange:2",
"CompactionJob::Run():End"}});
}
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
std::vector<std::thread> threads;
threads.emplace_back([&]() { Compact("a", "z"); });
TEST_SYNC_POINT("DBTest::FlushesInParallelWithCompactRange:1");
// this has to start a flush. if flushes are blocked, this will try to
// create
// 3 memtables, and that will fail because max_write_buffer_number is 2
for (int num = 0; num < 3; num++) {
GenerateNewRandomFile(&rnd, /* nowait */ true);
}
TEST_SYNC_POINT("DBTest::FlushesInParallelWithCompactRange:2");
for (auto& t : threads) {
t.join();
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DBTest, DelayedWriteRate) {
Options options;
options.env = env_;
env_->no_sleep_ = true;
options = CurrentOptions(options);
options.write_buffer_size = 100000; // Small write buffer
options.max_write_buffer_number = 256;
options.disable_auto_compactions = true;
options.level0_file_num_compaction_trigger = 3;
options.level0_slowdown_writes_trigger = 3;
options.level0_stop_writes_trigger = 999999;
options.delayed_write_rate = 200000; // About 200KB/s limited rate
CreateAndReopenWithCF({"pikachu"}, options);
for (int i = 0; i < 3; i++) {
Put(Key(i), std::string(10000, 'x'));
Flush();
}
// These writes will be slowed down to 1KB/s
size_t estimated_total_size = 0;
Random rnd(301);
for (int i = 0; i < 3000; i++) {
auto rand_num = rnd.Uniform(20);
// Spread the size range to more.
size_t entry_size = rand_num * rand_num * rand_num;
WriteOptions wo;
Put(Key(i), std::string(entry_size, 'x'), wo);
estimated_total_size += entry_size + 20;
// Ocassionally sleep a while
if (rnd.Uniform(20) == 6) {
env_->SleepForMicroseconds(2666);
}
}
uint64_t estimated_sleep_time =
estimated_total_size / options.delayed_write_rate * 1000000U;
ASSERT_GT(env_->addon_time_.load(), estimated_sleep_time * 0.8);
ASSERT_LT(env_->addon_time_.load(), estimated_sleep_time * 1.1);
env_->no_sleep_ = false;
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, HardLimit) {
Options options;
options.env = env_;
env_->SetBackgroundThreads(1, Env::LOW);
options = CurrentOptions(options);
options.max_write_buffer_number = 256;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 * 1024;
options.level0_file_num_compaction_trigger = 4;
options.level0_slowdown_writes_trigger = 999999;
options.level0_stop_writes_trigger = 999999;
options.hard_pending_compaction_bytes_limit = 800 << 10;
options.max_bytes_for_level_base = 10000000000u;
options.max_background_compactions = 1;
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
CreateAndReopenWithCF({"pikachu"}, options);
std::atomic<int> callback_count(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack("DBImpl::DelayWrite:Wait",
[&](void* arg) {
callback_count.fetch_add(1);
sleeping_task_low.WakeUp();
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
int key_idx = 0;
for (int num = 0; num < 5; num++) {
GenerateNewFile(&rnd, &key_idx, true);
}
ASSERT_EQ(0, callback_count.load());
for (int num = 0; num < 5; num++) {
GenerateNewFile(&rnd, &key_idx, true);
dbfull()->TEST_WaitForFlushMemTable();
}
ASSERT_GE(callback_count.load(), 1);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, SoftLimit) {
Options options;
options.env = env_;
options = CurrentOptions(options);
options.write_buffer_size = 100000; // Small write buffer
options.max_write_buffer_number = 256;
options.level0_file_num_compaction_trigger = 3;
options.level0_slowdown_writes_trigger = 3;
options.level0_stop_writes_trigger = 999999;
options.delayed_write_rate = 200000; // About 200KB/s limited rate
options.soft_rate_limit = 1.1;
options.target_file_size_base = 99999999; // All into one file
options.max_bytes_for_level_base = 50000;
options.compression = kNoCompression;
Reopen(options);
Put(Key(0), "");
// Only allow two compactions
port::Mutex mut;
port::CondVar cv(&mut);
std::atomic<int> compaction_cnt(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"VersionSet::LogAndApply:WriteManifest", [&](void* arg) {
// Three flushes and the first compaction,
// three flushes and the second compaction go through.
MutexLock l(&mut);
while (compaction_cnt.load() >= 8) {
cv.Wait();
}
compaction_cnt.fetch_add(1);
});
std::atomic<int> sleep_count(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DelayWrite:Sleep", [&](void* arg) { sleep_count.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
for (int i = 0; i < 3; i++) {
Put(Key(i), std::string(5000, 'x'));
Put(Key(100 - i), std::string(5000, 'x'));
Flush();
}
while (compaction_cnt.load() < 4 || NumTableFilesAtLevel(0) > 0) {
env_->SleepForMicroseconds(1000);
}
// Now there is one L1 file but doesn't trigger soft_rate_limit
ASSERT_EQ(NumTableFilesAtLevel(1), 1);
ASSERT_EQ(sleep_count.load(), 0);
for (int i = 0; i < 3; i++) {
Put(Key(10 + i), std::string(5000, 'x'));
Put(Key(90 - i), std::string(5000, 'x'));
Flush();
}
while (compaction_cnt.load() < 8 || NumTableFilesAtLevel(0) > 0) {
env_->SleepForMicroseconds(1000);
}
ASSERT_EQ(NumTableFilesAtLevel(1), 1);
ASSERT_EQ(sleep_count.load(), 0);
// Slowdown is triggered now
for (int i = 0; i < 10; i++) {
Put(Key(i), std::string(100, 'x'));
}
ASSERT_GT(sleep_count.load(), 0);
{
MutexLock l(&mut);
compaction_cnt.store(7);
cv.SignalAll();
}
while (NumTableFilesAtLevel(1) > 0) {
env_->SleepForMicroseconds(1000);
}
// Slowdown is not triggered any more.
sleep_count.store(0);
// Slowdown is not triggered now
for (int i = 0; i < 10; i++) {
Put(Key(i), std::string(100, 'x'));
}
ASSERT_EQ(sleep_count.load(), 0);
// shrink level base so L2 will hit soft limit easier.
ASSERT_OK(dbfull()->SetOptions({
{"max_bytes_for_level_base", "5000"},
}));
compaction_cnt.store(7);
Flush();
while (NumTableFilesAtLevel(0) == 0) {
env_->SleepForMicroseconds(1000);
}
// Slowdown is triggered now
for (int i = 0; i < 10; i++) {
Put(Key(i), std::string(100, 'x'));
}
ASSERT_GT(sleep_count.load(), 0);
{
MutexLock l(&mut);
compaction_cnt.store(7);
cv.SignalAll();
}
while (NumTableFilesAtLevel(2) != 0) {
env_->SleepForMicroseconds(1000);
}
// Slowdown is not triggered anymore
sleep_count.store(0);
for (int i = 0; i < 10; i++) {
Put(Key(i), std::string(100, 'x'));
}
ASSERT_EQ(sleep_count.load(), 0);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, FailWhenCompressionNotSupportedTest) {
CompressionType compressions[] = {kZlibCompression, kBZip2Compression,
kLZ4Compression, kLZ4HCCompression};
for (int iter = 0; iter < 4; ++iter) {
if (!CompressionTypeSupported(compressions[iter])) {
// not supported, we should fail the Open()
Options options = CurrentOptions();
options.compression = compressions[iter];
ASSERT_TRUE(!TryReopen(options).ok());
// Try if CreateColumnFamily also fails
options.compression = kNoCompression;
ASSERT_OK(TryReopen(options));
ColumnFamilyOptions cf_options(options);
cf_options.compression = compressions[iter];
ColumnFamilyHandle* handle;
ASSERT_TRUE(!db_->CreateColumnFamily(cf_options, "name", &handle).ok());
}
}
}
TEST_F(DBTest, RowCache) {
Options options = CurrentOptions();
options.statistics = rocksdb::CreateDBStatistics();
options.row_cache = NewLRUCache(8192);
DestroyAndReopen(options);
ASSERT_OK(Put("foo", "bar"));
ASSERT_OK(Flush());
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_HIT), 0);
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_MISS), 0);
ASSERT_EQ(Get("foo"), "bar");
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_HIT), 0);
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_MISS), 1);
ASSERT_EQ(Get("foo"), "bar");
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_HIT), 1);
ASSERT_EQ(TestGetTickerCount(options, ROW_CACHE_MISS), 1);
}
// TODO(3.13): fix the issue of Seek() + Prev() which might not necessary
// return the biggest key which is smaller than the seek key.
TEST_F(DBTest, PrevAfterMerge) {
Options options;
options.create_if_missing = true;
options.merge_operator = MergeOperators::CreatePutOperator();
DestroyAndReopen(options);
// write three entries with different keys using Merge()
WriteOptions wopts;
db_->Merge(wopts, "1", "data1");
db_->Merge(wopts, "2", "data2");
db_->Merge(wopts, "3", "data3");
std::unique_ptr<Iterator> it(db_->NewIterator(ReadOptions()));
it->Seek("2");
ASSERT_TRUE(it->Valid());
ASSERT_EQ("2", it->key().ToString());
it->Prev();
ASSERT_TRUE(it->Valid());
ASSERT_EQ("1", it->key().ToString());
}
TEST_F(DBTest, DeletingOldWalAfterDrop) {
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{ { "Test:AllowFlushes", "DBImpl::BGWorkFlush" },
{ "DBImpl::BGWorkFlush:done", "Test:WaitForFlush"} });
rocksdb::SyncPoint::GetInstance()->ClearTrace();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
Options options = CurrentOptions();
options.max_total_wal_size = 8192;
options.compression = kNoCompression;
options.write_buffer_size = 1 << 20;
options.level0_file_num_compaction_trigger = (1<<30);
options.level0_slowdown_writes_trigger = (1<<30);
options.level0_stop_writes_trigger = (1<<30);
options.disable_auto_compactions = true;
DestroyAndReopen(options);
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
CreateColumnFamilies({"cf1", "cf2"}, options);
ASSERT_OK(Put(0, "key1", DummyString(8192)));
ASSERT_OK(Put(0, "key2", DummyString(8192)));
// the oldest wal should now be getting_flushed
ASSERT_OK(db_->DropColumnFamily(handles_[0]));
// all flushes should now do nothing because their CF is dropped
TEST_SYNC_POINT("Test:AllowFlushes");
TEST_SYNC_POINT("Test:WaitForFlush");
uint64_t lognum1 = dbfull()->TEST_LogfileNumber();
ASSERT_OK(Put(1, "key3", DummyString(8192)));
ASSERT_OK(Put(1, "key4", DummyString(8192)));
// new wal should have been created
uint64_t lognum2 = dbfull()->TEST_LogfileNumber();
EXPECT_GT(lognum2, lognum1);
}
TEST_F(DBTest, RateLimitedDelete) {
rocksdb::SyncPoint::GetInstance()->LoadDependency({
{"DBTest::RateLimitedDelete:1",
"DeleteSchedulerImpl::BackgroundEmptyTrash"},
});
std::vector<uint64_t> penalties;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DeleteSchedulerImpl::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<int*>(arg))); });
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.env = env_;
std::string trash_dir = test::TmpDir(env_) + "/trash";
int64_t rate_bytes_per_sec = 1024 * 10; // 10 Kbs / Sec
Status s;
options.delete_scheduler.reset(NewDeleteScheduler(
env_, trash_dir, rate_bytes_per_sec, nullptr, false, &s));
ASSERT_OK(s);
Destroy(last_options_);
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(TryReopen(options));
// Create 4 files in L0
for (char v = 'a'; v <= 'd'; v++) {
ASSERT_OK(Put("Key2", DummyString(1024, v)));
ASSERT_OK(Put("Key3", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Put("Key1", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
// Compaction will move the 4 files in L0 to trash and create 1 L1 file
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel(0));
uint64_t delete_start_time = env_->NowMicros();
// Hold BackgroundEmptyTrash
TEST_SYNC_POINT("DBTest::RateLimitedDelete:1");
options.delete_scheduler->WaitForEmptyTrash();
uint64_t time_spent_deleting = env_->NowMicros() - delete_start_time;
uint64_t total_files_size = 0;
uint64_t expected_penlty = 0;
ASSERT_EQ(penalties.size(), metadata.size());
for (size_t i = 0; i < metadata.size(); i++) {
total_files_size += metadata[i].size;
expected_penlty = ((total_files_size * 1000000) / rate_bytes_per_sec);
ASSERT_EQ(expected_penlty, penalties[i]);
}
ASSERT_GT(time_spent_deleting, expected_penlty * 0.9);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
// Create a DB with 2 db_paths, and generate multiple files in the 2
// db_paths using CompactRangeOptions, make sure that files that were
// deleted from first db_path were deleted using DeleteScheduler and
// files in the second path were not.
TEST_F(DBTest, DeleteSchedulerMultipleDBPaths) {
int bg_delete_file = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DeleteSchedulerImpl::DeleteTrashFile:DeleteFile",
[&](void* arg) { bg_delete_file++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.db_paths.emplace_back(dbname_, 1024 * 100);
options.db_paths.emplace_back(dbname_ + "_2", 1024 * 100);
options.env = env_;
std::string trash_dir = test::TmpDir(env_) + "/trash";
int64_t rate_bytes_per_sec = 1024 * 1024; // 1 Mb / Sec
Status s;
options.delete_scheduler.reset(NewDeleteScheduler(
env_, trash_dir, rate_bytes_per_sec, nullptr, false, &s));
ASSERT_OK(s);
DestroyAndReopen(options);
// Create 4 files in L0
for (int i = 0; i < 4; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'A')));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
// Compaction will delete files from L0 in first db path and generate a new
// file in L1 in second db path
CompactRangeOptions compact_options;
compact_options.target_path_id = 1;
Slice begin("Key0");
Slice end("Key3");
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
ASSERT_EQ("0,1", FilesPerLevel(0));
// Create 4 files in L0
for (int i = 4; i < 8; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'B')));
ASSERT_OK(Flush());
}
ASSERT_EQ("4,1", FilesPerLevel(0));
// Compaction will delete files from L0 in first db path and generate a new
// file in L1 in second db path
begin = "Key4";
end = "Key7";
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
ASSERT_EQ("0,2", FilesPerLevel(0));
options.delete_scheduler->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 8);
compact_options.bottommost_level_compaction =
BottommostLevelCompaction::kForce;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel(0));
options.delete_scheduler->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 8);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, DestroyDBWithRateLimitedDelete) {
int bg_delete_file = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DeleteSchedulerImpl::DeleteTrashFile:DeleteFile",
[&](void* arg) { bg_delete_file++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.env = env_;
DestroyAndReopen(options);
// Create 4 files in L0
for (int i = 0; i < 4; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'A')));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
// Close DB and destory it using DeleteScheduler
Close();
std::string trash_dir = test::TmpDir(env_) + "/trash";
int64_t rate_bytes_per_sec = 1024 * 1024; // 1 Mb / Sec
Status s;
options.delete_scheduler.reset(NewDeleteScheduler(
env_, trash_dir, rate_bytes_per_sec, nullptr, false, &s));
ASSERT_OK(s);
ASSERT_OK(DestroyDB(dbname_, options));
options.delete_scheduler->WaitForEmptyTrash();
// We have deleted the 4 sst files in the delete_scheduler
ASSERT_EQ(bg_delete_file, 4);
}
TEST_F(DBTest, UnsupportedManualSync) {
DestroyAndReopen(CurrentOptions());
env_->is_wal_sync_thread_safe_.store(false);
Status s = db_->SyncWAL();
ASSERT_TRUE(s.IsNotSupported());
}
TEST_F(DBTest, OpenDBWithInfiniteMaxOpenFiles) {
// Open DB with infinite max open files
// - First iteration use 1 thread to open files
// - Second iteration use 5 threads to open files
for (int iter = 0; iter < 2; iter++) {
Options options;
options.create_if_missing = true;
options.write_buffer_size = 100000;
options.disable_auto_compactions = true;
options.max_open_files = -1;
if (iter == 0) {
options.max_file_opening_threads = 1;
} else {
options.max_file_opening_threads = 5;
}
options = CurrentOptions(options);
DestroyAndReopen(options);
// Create 12 Files in L0 (then move then to L2)
for (int i = 0; i < 12; i++) {
std::string k = "L2_" + Key(i);
ASSERT_OK(Put(k, k + std::string(1000, 'a')));
ASSERT_OK(Flush());
}
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 2;
db_->CompactRange(compact_options, nullptr, nullptr);
// Create 12 Files in L0
for (int i = 0; i < 12; i++) {
std::string k = "L0_" + Key(i);
ASSERT_OK(Put(k, k + std::string(1000, 'a')));
ASSERT_OK(Flush());
}
Close();
// Reopening the DB will load all exisitng files
Reopen(options);
ASSERT_EQ("12,0,12", FilesPerLevel(0));
std::vector<std::vector<FileMetaData>> files;
dbfull()->TEST_GetFilesMetaData(db_->DefaultColumnFamily(), &files);
for (const auto& level : files) {
for (const auto& file : level) {
ASSERT_TRUE(file.table_reader_handle != nullptr);
}
}
for (int i = 0; i < 12; i++) {
ASSERT_EQ(Get("L0_" + Key(i)), "L0_" + Key(i) + std::string(1000, 'a'));
ASSERT_EQ(Get("L2_" + Key(i)), "L2_" + Key(i) + std::string(1000, 'a'));
}
}
}
TEST_F(DBTest, GetTotalSstFilesSize) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
DestroyAndReopen(options);
// Generate 5 files in L0
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 10; j++) {
std::string val = "val_file_" + ToString(i);
ASSERT_OK(Put(Key(j), val));
}
Flush();
}
ASSERT_EQ("5", FilesPerLevel(0));
std::vector<LiveFileMetaData> live_files_meta;
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
uint64_t single_file_size = live_files_meta[0].size;
uint64_t live_sst_files_size = 0;
uint64_t total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
// Compact 5 files into 1 file in L0
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 1);
live_sst_files_size = 0;
total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 1 (compacted file)
// Total SST files = 6 (5 original files + compacted file)
ASSERT_EQ(live_sst_files_size, 1 * single_file_size);
ASSERT_EQ(total_sst_files_size, 6 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
// Delete all keys and compact, this will delete all live files
for (int i = 0; i < 10; i++) {
ASSERT_OK(Delete(Key(i)));
}
Flush();
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 0);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 6 (5 original files + compacted file)
ASSERT_EQ(total_sst_files_size, 6 * single_file_size);
iter1.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 1 (compacted file)
ASSERT_EQ(total_sst_files_size, 1 * single_file_size);
iter2.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 0
ASSERT_EQ(total_sst_files_size, 0);
}
TEST_F(DBTest, GetTotalSstFilesSizeVersionsFilesShared) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
DestroyAndReopen(options);
// Generate 5 files in L0
for (int i = 0; i < 5; i++) {
ASSERT_OK(Put(Key(i), "val"));
Flush();
}
ASSERT_EQ("5", FilesPerLevel(0));
std::vector<LiveFileMetaData> live_files_meta;
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
uint64_t single_file_size = live_files_meta[0].size;
uint64_t live_sst_files_size = 0;
uint64_t total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
// Compaction will do trivial move from L0 to L1
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,5", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
live_sst_files_size = 0;
total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5 (used in 2 version)
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
// Delete all keys and compact, this will delete all live files
for (int i = 0; i < 5; i++) {
ASSERT_OK(Delete(Key(i)));
}
Flush();
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 0);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 5 (used in 2 version)
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
iter1.reset();
iter2.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 0
ASSERT_EQ(total_sst_files_size, 0);
}
INSTANTIATE_TEST_CASE_P(DBTestWithParam, DBTestWithParam,
::testing::Values(1, 4));
} // namespace rocksdb
#endif
int main(int argc, char** argv) {
#if !(defined NDEBUG) || !defined(OS_WIN)
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
#else
return 0;
#endif
}
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