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rocksdb/db/db_test.cc
agiardullo 16ea1c7d1c simple ManagedSnapshot wrapper 
Summary: Implemented this simple wrapper for something else I was working on.  Seemed like it makes sense to expose it instead of burying it in some random code.

Test Plan: added test

Reviewers: rven, kradhakrishnan, sdong, yhchiang

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43293
2015-08-06 17:59:05 -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/delete_scheduler_impl.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() {
num_subcompactions_ = GetParam();
}
// Required if inheriting from testing::WithParamInterface<>
static void SetUpTestCase() {}
static void TearDownTestCase() {}
uint32_t num_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);
}
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, 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) {
// NOt supported 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());
}
class SleepingBackgroundTask {
public:
SleepingBackgroundTask()
: bg_cv_(&mutex_), should_sleep_(true), done_with_sleep_(false) {}
void DoSleep() {
MutexLock l(&mutex_);
while (should_sleep_) {
bg_cv_.Wait();
}
done_with_sleep_ = true;
bg_cv_.SignalAll();
}
void WakeUp() {
MutexLock l(&mutex_);
should_sleep_ = false;
bg_cv_.SignalAll();
}
void WaitUntilDone() {
MutexLock l(&mutex_);
while (!done_with_sleep_) {
bg_cv_.Wait();
}
}
bool WokenUp() {
MutexLock l(&mutex_);
return should_sleep_ == false;
}
void Reset() {
MutexLock l(&mutex_);
should_sleep_ = true;
done_with_sleep_ = false;
}
static void DoSleepTask(void* arg) {
reinterpret_cast<SleepingBackgroundTask*>(arg)->DoSleep();
}
private:
port::Mutex mutex_;
port::CondVar bg_cv_; // Signalled when background work finishes
bool should_sleep_;
bool done_with_sleep_;
};
TEST_F(DBTest, FlushEmptyColumnFamily) {
// Block flush thread and disable compaction thread
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&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);
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&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();
dbfull()->TEST_WaitForFlushMemTable();
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);
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, 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 = 100 * 1000;
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.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 is triggered.
ASSERT_OK(Flush(1));
ASSERT_EQ("sixth", Get(1, "foo"));
ASSERT_EQ("fourth", Get(1, "foo", snapshot2));
ASSERT_EQ("first", Get(1, "foo", snapshot1));
ASSERT_EQ(AllEntriesFor("foo", 1),
"[ sixth, fifth, fourth, third, second, first ]");
// After a compaction, "second", "third" and "fifth" should
// be removed
FillLevels("a", "z", 1);
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr,
nullptr);
ASSERT_EQ("sixth", Get(1, "foo"));
ASSERT_EQ("fourth", Get(1, "foo", snapshot2));
ASSERT_EQ("first", Get(1, "foo", snapshot1));
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, 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 = 1000; // Compact more often
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) {
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 = 1000;
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 = 10;
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;
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 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::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::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::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);
// 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.compaction_options_fifo.max_table_files_size = 500 << 10; // 500KB
options.compression = kNoCompression;
options.create_if_missing = true;
options.num_subcompactions = num_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 < 100; ++j) {
ASSERT_OK(Put(ToString(i * 100 + j), RandomString(&rnd, 1024)));
}
// 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;
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(&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 prefix("g1");
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> iter(db_->NewIterator(ro));
iter->Seek("foo");
ASSERT_TRUE(!iter->Valid());
ASSERT_TRUE(iter->status().IsInvalidArgument());
}
// 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;
Options options;
options.env = env_;
options.create_if_missing = true;
options.compression = kNoCompression;
options.max_background_compactions = 1;
options.write_buffer_size = k64KB;
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](int size) {
Random rnd(301);
for (int i = 0; i < size; i++) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, 1024)));
}
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);
// 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);
ASSERT_LT(SizeAtLevel(0), k128KB + k64KB + 2 * k5KB);
ASSERT_GT(SizeAtLevel(0), k128KB + k64KB - 2 * 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);
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&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(&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(&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::~FlushJob()"},
});
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
VerifyOperationCount(env_, ThreadStatus::OP_FLUSH, 0);
Put(1, "k2", std::string(100000, 'y')); // Trigger flush
// wait for flush to be scheduled
env_->SleepForMicroseconds(250000);
TEST_SYNC_POINT("DBTest::ThreadStatusFlush:1");
VerifyOperationCount(env_, ThreadStatus::OP_FLUSH, 1);
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.num_subcompactions = num_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.num_subcompactions = num_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.num_subcompactions = num_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.num_subcompactions = num_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_P(DBTestWithParam, 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.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;
options.num_subcompactions = num_subcompactions_;
// 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
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&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(&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 = 256 * 1024;
options.target_file_size_base = 256 * 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.compaction_style = kCompactionStyleLevel;
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;
for (int i = 0; i < 20; i += 2) {
for (int j = i; j < numkeys; j += 20) {
ASSERT_OK(Put(1, Key(j), "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));
// When the skip_filters_on_last_level is ON, the last level which has
// most of the keys does not use bloom filters. We end up using
// bloom filters in a very small number of cases. Without the flag.
// this number would be close to 150000 (all the key at the last level) +
// some use in the upper levels
//
ASSERT_GT(90000, TestGetTickerCount(options, BLOOM_FILTER_USEFUL));
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));
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 = 100 << 10; // 100KB
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);
SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&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.num_subcompactions = num_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.num_subcompactions = num_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 = 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_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, 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));
// Hold BackgroundEmptyTrash
TEST_SYNC_POINT("DBTest::RateLimitedDelete:1");
uint64_t delete_start_time = env_->NowMicros();
reinterpret_cast<DeleteSchedulerImpl*>(options.delete_scheduler.get())
->TEST_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));
reinterpret_cast<DeleteSchedulerImpl*>(options.delete_scheduler.get())
->TEST_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));
reinterpret_cast<DeleteSchedulerImpl*>(options.delete_scheduler.get())
->TEST_WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 8);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBTest, UnsupportedManualSync) {
DestroyAndReopen(CurrentOptions());
env_->is_wal_sync_thread_safe_.store(false);
Status s = db_->SyncWAL();
ASSERT_TRUE(s.IsNotSupported());
}
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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