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rocksdb/db/db_properties_test.cc
Maysam Yabandeh caf0f53a74 Index value delta encoding (#3983) 
Summary:
Given that index value is a BlockHandle, which is basically an <offset, size> pair we can apply delta encoding on the values. The first value at each index restart interval encoded the full BlockHandle but the rest encode only the size. Refer to IndexBlockIter::DecodeCurrentValue for the detail of the encoding. This reduces the index size which helps using the  block cache more efficiently. The feature is enabled with using format_version 4.

The feature comes with a bit of cpu overhead which should be paid back by the higher cache hits due to smaller index block size.
Results with sysbench read-only using 4k blocks and using 16 index restart interval:
Format 2:
19585   rocksdb read-only range=100
Format 3:
19569   rocksdb read-only range=100
Format 4:
19352   rocksdb read-only range=100
Pull Request resolved: https://github.com/facebook/rocksdb/pull/3983

Differential Revision: D8361343

Pulled By: maysamyabandeh

fbshipit-source-id: f882ee082322acac32b0072e2bdbb0b5f854e651
2018-08-09 16:58:40 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root 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.
#include <stdio.h>
#include <algorithm>
#include <string>
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "rocksdb/listener.h"
#include "rocksdb/options.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/perf_level.h"
#include "rocksdb/table.h"
#include "util/random.h"
#include "util/string_util.h"
namespace rocksdb {
class DBPropertiesTest : public DBTestBase {
public:
DBPropertiesTest() : DBTestBase("/db_properties_test") {}
};
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, Empty) {
do {
Options options;
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
options.allow_concurrent_memtable_write = false;
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("0", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("0", num);
ASSERT_OK(db_->DisableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("0", num);
ASSERT_OK(db_->EnableFileDeletions(false));
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("0", num);
ASSERT_OK(db_->EnableFileDeletions());
ASSERT_TRUE(
dbfull()->GetProperty("rocksdb.is-file-deletions-enabled", &num));
ASSERT_EQ("1", num);
} while (ChangeOptions());
}
TEST_F(DBPropertiesTest, CurrentVersionNumber) {
uint64_t v1, v2, v3;
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.current-super-version-number", &v1));
Put("12345678", "");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.current-super-version-number", &v2));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.current-super-version-number", &v3));
ASSERT_EQ(v1, v2);
ASSERT_GT(v3, v2);
}
TEST_F(DBPropertiesTest, GetAggregatedIntPropertyTest) {
const int kKeySize = 100;
const int kValueSize = 500;
const int kKeyNum = 100;
Options options;
options.env = env_;
options.create_if_missing = true;
options.write_buffer_size = (kKeySize + kValueSize) * kKeyNum / 10;
// Make them never flush
options.min_write_buffer_number_to_merge = 1000;
options.max_write_buffer_number = 1000;
options = CurrentOptions(options);
CreateAndReopenWithCF({"one", "two", "three", "four"}, options);
Random rnd(301);
for (auto* handle : handles_) {
for (int i = 0; i < kKeyNum; ++i) {
db_->Put(WriteOptions(), handle, RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
}
uint64_t manual_sum = 0;
uint64_t api_sum = 0;
uint64_t value = 0;
for (auto* handle : handles_) {
ASSERT_TRUE(
db_->GetIntProperty(handle, DB::Properties::kSizeAllMemTables, &value));
manual_sum += value;
}
ASSERT_TRUE(db_->GetAggregatedIntProperty(DB::Properties::kSizeAllMemTables,
&api_sum));
ASSERT_GT(manual_sum, 0);
ASSERT_EQ(manual_sum, api_sum);
ASSERT_FALSE(db_->GetAggregatedIntProperty(DB::Properties::kDBStats, &value));
uint64_t before_flush_trm;
uint64_t after_flush_trm;
for (auto* handle : handles_) {
ASSERT_TRUE(db_->GetAggregatedIntProperty(
DB::Properties::kEstimateTableReadersMem, &before_flush_trm));
// Issue flush and expect larger memory usage of table readers.
db_->Flush(FlushOptions(), handle);
ASSERT_TRUE(db_->GetAggregatedIntProperty(
DB::Properties::kEstimateTableReadersMem, &after_flush_trm));
ASSERT_GT(after_flush_trm, before_flush_trm);
}
}
namespace {
void ResetTableProperties(TableProperties* tp) {
tp->data_size = 0;
tp->index_size = 0;
tp->filter_size = 0;
tp->raw_key_size = 0;
tp->raw_value_size = 0;
tp->num_data_blocks = 0;
tp->num_entries = 0;
tp->num_range_deletions = 0;
}
void ParseTablePropertiesString(std::string tp_string, TableProperties* tp) {
double dummy_double;
std::replace(tp_string.begin(), tp_string.end(), ';', ' ');
std::replace(tp_string.begin(), tp_string.end(), '=', ' ');
ResetTableProperties(tp);
sscanf(tp_string.c_str(),
"# data blocks %" SCNu64 " # entries %" SCNu64
" # range deletions %" SCNu64 " raw key size %" SCNu64
" raw average key size %lf "
" raw value size %" SCNu64
" raw average value size %lf "
" data block size %" SCNu64 " index block size (user-key? %" SCNu64
", delta-value? %" SCNu64 ") %" SCNu64 " filter block size %" SCNu64,
&tp->num_data_blocks, &tp->num_entries, &tp->num_range_deletions,
&tp->raw_key_size, &dummy_double, &tp->raw_value_size, &dummy_double,
&tp->data_size, &tp->index_key_is_user_key,
&tp->index_value_is_delta_encoded, &tp->index_size, &tp->filter_size);
}
void VerifySimilar(uint64_t a, uint64_t b, double bias) {
ASSERT_EQ(a == 0U, b == 0U);
if (a == 0) {
return;
}
double dbl_a = static_cast<double>(a);
double dbl_b = static_cast<double>(b);
if (dbl_a > dbl_b) {
ASSERT_LT(static_cast<double>(dbl_a - dbl_b) / (dbl_a + dbl_b), bias);
} else {
ASSERT_LT(static_cast<double>(dbl_b - dbl_a) / (dbl_a + dbl_b), bias);
}
}
void VerifyTableProperties(const TableProperties& base_tp,
const TableProperties& new_tp,
double filter_size_bias = 0.1,
double index_size_bias = 0.1,
double data_size_bias = 0.1,
double num_data_blocks_bias = 0.05) {
VerifySimilar(base_tp.data_size, new_tp.data_size, data_size_bias);
VerifySimilar(base_tp.index_size, new_tp.index_size, index_size_bias);
VerifySimilar(base_tp.filter_size, new_tp.filter_size, filter_size_bias);
VerifySimilar(base_tp.num_data_blocks, new_tp.num_data_blocks,
num_data_blocks_bias);
ASSERT_EQ(base_tp.raw_key_size, new_tp.raw_key_size);
ASSERT_EQ(base_tp.raw_value_size, new_tp.raw_value_size);
ASSERT_EQ(base_tp.num_entries, new_tp.num_entries);
ASSERT_EQ(base_tp.num_range_deletions, new_tp.num_range_deletions);
}
void GetExpectedTableProperties(
TableProperties* expected_tp, const int kKeySize, const int kValueSize,
const int kKeysPerTable, const int kRangeDeletionsPerTable,
const int kTableCount, const int kBloomBitsPerKey, const size_t kBlockSize,
const bool index_key_is_user_key, const bool value_delta_encoding) {
const int kKeyCount = kTableCount * kKeysPerTable;
const int kRangeDeletionCount = kTableCount * kRangeDeletionsPerTable;
const int kAvgSuccessorSize = kKeySize / 5;
const int kEncodingSavePerKey = kKeySize / 4;
expected_tp->raw_key_size = (kKeyCount + kRangeDeletionCount) * (kKeySize + 8);
expected_tp->raw_value_size = (kKeyCount + kRangeDeletionCount) * kValueSize;
expected_tp->num_entries = kKeyCount;
expected_tp->num_range_deletions = kRangeDeletionCount;
expected_tp->num_data_blocks =
kTableCount *
(kKeysPerTable * (kKeySize - kEncodingSavePerKey + kValueSize)) /
kBlockSize;
expected_tp->data_size =
kTableCount * (kKeysPerTable * (kKeySize + 8 + kValueSize));
expected_tp->index_size =
expected_tp->num_data_blocks *
(kAvgSuccessorSize + (index_key_is_user_key ? 0 : 8) -
// discount 1 byte as value size is not encoded in value delta encoding
(value_delta_encoding ? 1 : 0));
expected_tp->filter_size =
kTableCount * (kKeysPerTable * kBloomBitsPerKey / 8);
}
} // anonymous namespace
TEST_F(DBPropertiesTest, ValidatePropertyInfo) {
for (const auto& ppt_name_and_info : InternalStats::ppt_name_to_info) {
// If C++ gets a std::string_literal, this would be better to check at
// compile-time using static_assert.
ASSERT_TRUE(ppt_name_and_info.first.empty() ||
!isdigit(ppt_name_and_info.first.back()));
int count = 0;
count += (ppt_name_and_info.second.handle_string == nullptr) ? 0 : 1;
count += (ppt_name_and_info.second.handle_int == nullptr) ? 0 : 1;
count += (ppt_name_and_info.second.handle_string_dbimpl == nullptr) ? 0 : 1;
ASSERT_TRUE(count == 1);
}
}
TEST_F(DBPropertiesTest, ValidateSampleNumber) {
// When "max_open_files" is -1, we read all the files for
// "rocksdb.estimate-num-keys" computation, which is the ground truth.
// Otherwise, we sample 20 newest files to make an estimation.
// Formula: lastest_20_files_active_key_ratio * total_files
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.level0_stop_writes_trigger = 1000;
DestroyAndReopen(options);
int key = 0;
for (int files = 20; files >= 10; files -= 10) {
for (int i = 0; i < files; i++) {
int rows = files / 10;
for (int j = 0; j < rows; j++) {
db_->Put(WriteOptions(), std::to_string(++key), "foo");
}
db_->Flush(FlushOptions());
}
}
std::string num;
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ("45", num);
options.max_open_files = -1;
Reopen(options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ("50", num);
}
TEST_F(DBPropertiesTest, AggregatedTableProperties) {
for (int kTableCount = 40; kTableCount <= 100; kTableCount += 30) {
const int kRangeDeletionsPerTable = 5;
const int kKeysPerTable = 100;
const int kKeySize = 80;
const int kValueSize = 200;
const int kBloomBitsPerKey = 20;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
// Hold open a snapshot to prevent range tombstones from being compacted
// away.
ManagedSnapshot snapshot(db_);
Random rnd(5632);
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
for (int i = 0; i < kRangeDeletionsPerTable; i++) {
std::string start = RandomString(&rnd, kKeySize);
std::string end = start;
end.resize(kValueSize);
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), start, end);
}
db_->Flush(FlushOptions());
}
std::string property;
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &property);
TableProperties output_tp;
ParseTablePropertiesString(property, &output_tp);
bool index_key_is_user_key = output_tp.index_key_is_user_key > 0;
bool value_is_delta_encoded = output_tp.index_value_is_delta_encoded > 0;
TableProperties expected_tp;
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, kRangeDeletionsPerTable,
kTableCount, kBloomBitsPerKey,
table_options.block_size, index_key_is_user_key,
value_is_delta_encoded);
VerifyTableProperties(expected_tp, output_tp);
}
}
TEST_F(DBPropertiesTest, ReadLatencyHistogramByLevel) {
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10;
options.level0_file_num_compaction_trigger = 6;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 4500 << 10;
options.target_file_size_base = 98 << 10;
options.max_write_buffer_number = 2;
options.statistics = rocksdb::CreateDBStatistics();
options.max_open_files = 100;
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
CreateAndReopenWithCF({"pikachu"}, options);
int key_index = 0;
Random rnd(301);
for (int num = 0; num < 8; num++) {
Put("foo", "bar");
GenerateNewFile(&rnd, &key_index);
dbfull()->TEST_WaitForCompact();
}
dbfull()->TEST_WaitForCompact();
std::string prop;
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.dbstats", &prop));
// Get() after flushes, See latency histogram tracked.
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.cfstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue Get(). See thee latency tracked
ReopenWithColumnFamilies({"default", "pikachu"}, options);
dbfull()->TEST_WaitForCompact();
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
// Test for getting immutable_db_options_.statistics
ASSERT_TRUE(dbfull()->GetProperty(dbfull()->DefaultColumnFamily(),
"rocksdb.options-statistics", &prop));
ASSERT_NE(std::string::npos, prop.find("rocksdb.block.cache.miss"));
ASSERT_EQ(std::string::npos, prop.find("rocksdb.db.f.micros"));
ASSERT_TRUE(dbfull()->GetProperty(dbfull()->DefaultColumnFamily(),
"rocksdb.cf-file-histogram", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Reopen and issue iterating. See thee latency tracked
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.cf-file-histogram", &prop));
ASSERT_EQ(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
{
unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->Seek(Key(0)); iter->Valid(); iter->Next()) {
}
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.cf-file-histogram", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// CF 1 should show no histogram.
ASSERT_TRUE(
dbfull()->GetProperty(handles_[1], "rocksdb.cf-file-histogram", &prop));
ASSERT_EQ(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// put something and read it back , CF 1 should show histogram.
Put(1, "foo", "bar");
Flush(1);
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("bar", Get(1, "foo"));
ASSERT_TRUE(
dbfull()->GetProperty(handles_[1], "rocksdb.cf-file-histogram", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// options.max_open_files preloads table readers.
options.max_open_files = -1;
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(dbfull()->GetProperty(dbfull()->DefaultColumnFamily(),
"rocksdb.cf-file-histogram", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
for (int key = 0; key < key_index; key++) {
Get(Key(key));
}
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.cfstats", &prop));
ASSERT_NE(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_NE(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
// Clear internal stats
dbfull()->ResetStats();
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.cfstats", &prop));
ASSERT_EQ(std::string::npos, prop.find("** Level 0 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 1 read latency histogram"));
ASSERT_EQ(std::string::npos, prop.find("** Level 2 read latency histogram"));
}
TEST_F(DBPropertiesTest, AggregatedTablePropertiesAtLevel) {
const int kTableCount = 100;
const int kRangeDeletionsPerTable = 2;
const int kKeysPerTable = 10;
const int kKeySize = 50;
const int kValueSize = 400;
const int kMaxLevel = 7;
const int kBloomBitsPerKey = 20;
Random rnd(301);
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
options.compression = kNoCompression;
options.create_if_missing = true;
options.level0_file_num_compaction_trigger = 2;
options.target_file_size_base = 8192;
options.max_bytes_for_level_base = 10000;
options.max_bytes_for_level_multiplier = 2;
// This ensures there no compaction happening when we call GetProperty().
options.disable_auto_compactions = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(
NewBloomFilterPolicy(kBloomBitsPerKey, false));
table_options.block_size = 1024;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
DestroyAndReopen(options);
// Hold open a snapshot to prevent range tombstones from being compacted away.
ManagedSnapshot snapshot(db_);
std::string level_tp_strings[kMaxLevel];
std::string tp_string;
TableProperties level_tps[kMaxLevel];
TableProperties tp, sum_tp, expected_tp;
for (int table = 1; table <= kTableCount; ++table) {
for (int i = 0; i < kKeysPerTable; ++i) {
db_->Put(WriteOptions(), RandomString(&rnd, kKeySize),
RandomString(&rnd, kValueSize));
}
for (int i = 0; i < kRangeDeletionsPerTable; i++) {
std::string start = RandomString(&rnd, kKeySize);
std::string end = start;
end.resize(kValueSize);
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), start, end);
}
db_->Flush(FlushOptions());
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ResetTableProperties(&sum_tp);
for (int level = 0; level < kMaxLevel; ++level) {
db_->GetProperty(
DB::Properties::kAggregatedTablePropertiesAtLevel + ToString(level),
&level_tp_strings[level]);
ParseTablePropertiesString(level_tp_strings[level], &level_tps[level]);
sum_tp.data_size += level_tps[level].data_size;
sum_tp.index_size += level_tps[level].index_size;
sum_tp.filter_size += level_tps[level].filter_size;
sum_tp.raw_key_size += level_tps[level].raw_key_size;
sum_tp.raw_value_size += level_tps[level].raw_value_size;
sum_tp.num_data_blocks += level_tps[level].num_data_blocks;
sum_tp.num_entries += level_tps[level].num_entries;
sum_tp.num_range_deletions += level_tps[level].num_range_deletions;
}
db_->GetProperty(DB::Properties::kAggregatedTableProperties, &tp_string);
ParseTablePropertiesString(tp_string, &tp);
bool index_key_is_user_key = tp.index_key_is_user_key > 0;
bool value_is_delta_encoded = tp.index_value_is_delta_encoded > 0;
ASSERT_EQ(sum_tp.data_size, tp.data_size);
ASSERT_EQ(sum_tp.index_size, tp.index_size);
ASSERT_EQ(sum_tp.filter_size, tp.filter_size);
ASSERT_EQ(sum_tp.raw_key_size, tp.raw_key_size);
ASSERT_EQ(sum_tp.raw_value_size, tp.raw_value_size);
ASSERT_EQ(sum_tp.num_data_blocks, tp.num_data_blocks);
ASSERT_EQ(sum_tp.num_entries, tp.num_entries);
ASSERT_EQ(sum_tp.num_range_deletions, tp.num_range_deletions);
if (table > 3) {
GetExpectedTableProperties(&expected_tp, kKeySize, kValueSize,
kKeysPerTable, kRangeDeletionsPerTable, table,
kBloomBitsPerKey, table_options.block_size,
index_key_is_user_key, value_is_delta_encoded);
// Gives larger bias here as index block size, filter block size,
// and data block size become much harder to estimate in this test.
VerifyTableProperties(expected_tp, tp, 0.5, 0.4, 0.4, 0.25);
}
}
}
TEST_F(DBPropertiesTest, 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 = 4;
options.write_buffer_size = 1000000;
CreateAndReopenWithCF({"pikachu"}, options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t value;
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], DB::Properties::kNumImmutableMemTableFlushed, &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty(
handles_[1], "rocksdb.num-entries-active-mem-table", &num));
ASSERT_EQ(num, "1");
get_perf_context()->Reset();
Get(1, "k1");
ASSERT_EQ(1, static_cast<int>(get_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");
get_perf_context()->Reset();
Get(1, "k1");
ASSERT_EQ(2, static_cast<int>(get_perf_context()->get_from_memtable_count));
get_perf_context()->Reset();
Get(1, "k2");
ASSERT_EQ(1, static_cast<int>(get_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");
get_perf_context()->Reset();
Get(1, "k2");
ASSERT_EQ(2, static_cast<int>(get_perf_context()->get_from_memtable_count));
get_perf_context()->Reset();
Get(1, "k3");
ASSERT_EQ(1, static_cast<int>(get_perf_context()->get_from_memtable_count));
get_perf_context()->Reset();
Get(1, "k1");
ASSERT_EQ(3, static_cast<int>(get_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], DB::Properties::kNumImmutableMemTableFlushed, &num));
ASSERT_EQ(num, "3");
ASSERT_TRUE(dbfull()->GetIntProperty(
handles_[1], "rocksdb.cur-size-active-mem-table", &value));
// "192" is the size of the metadata of two empty skiplists, this would
// break if we change the default skiplist implementation
ASSERT_GE(value, 192);
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());
}
// TODO(techdept) : Disabled flaky test #12863555
TEST_F(DBPropertiesTest, DISABLED_GetProperty) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
test::SleepingBackgroundTask sleeping_task_high;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_task_high, Env::Priority::HIGH);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleUniversal;
options.level0_file_num_compaction_trigger = 1;
options.compaction_options_universal.size_ratio = 50;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
SetPerfLevel(kEnableTime);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-live-data-size", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "1");
get_perf_context()->Reset();
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "1");
ASSERT_OK(dbfull()->Delete(writeOpt, "k-non-existing"));
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.num-immutable-mem-table", &num));
ASSERT_EQ(num, "2");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "2");
// Verify the same set of properties through GetIntProperty
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-immutable-mem-table", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.mem-table-flush-pending", &int_num));
ASSERT_EQ(int_num, 1U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.compaction-pending", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_EQ(int_num, 2U);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U);
sleeping_task_high.WakeUp();
sleeping_task_high.WaitUntilDone();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_OK(dbfull()->Put(writeOpt, "k4", big_value));
ASSERT_OK(dbfull()->Put(writeOpt, "k5", big_value));
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.mem-table-flush-pending", &num));
ASSERT_EQ(num, "0");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.compaction-pending", &num));
ASSERT_EQ(num, "1");
ASSERT_TRUE(dbfull()->GetProperty("rocksdb.estimate-num-keys", &num));
ASSERT_EQ(num, "4");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
// Wait for compaction to be done. This is important because otherwise RocksDB
// might schedule a compaction when reopening the database, failing assertion
// (A) as a result.
dbfull()->TEST_WaitForCompact();
options.max_open_files = 10;
Reopen(options);
// After reopening, no table reader is loaded, so no memory for table readers
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_EQ(int_num, 0U); // (A)
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &int_num));
ASSERT_GT(int_num, 0U);
// After reading a key, at least one table reader is loaded.
Get("k5");
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
ASSERT_GT(int_num, 0U);
// Test rocksdb.num-live-versions
{
options.level0_file_num_compaction_trigger = 20;
Reopen(options);
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k6", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
// Use an iterator to hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
ASSERT_OK(dbfull()->Put(writeOpt, "k7", big_value));
Flush();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 3U);
iter2.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 2U);
iter1.reset();
ASSERT_TRUE(
dbfull()->GetIntProperty("rocksdb.num-live-versions", &int_num));
ASSERT_EQ(int_num, 1U);
}
}
TEST_F(DBPropertiesTest, ApproximateMemoryUsage) {
const int kNumRounds = 10;
// TODO(noetzli) kFlushesPerRound does not really correlate with how many
// flushes happen.
const int kFlushesPerRound = 10;
const int kWritesPerFlush = 10;
const int kKeySize = 100;
const int kValueSize = 1000;
Options options;
options.write_buffer_size = 1000; // small write buffer
options.min_write_buffer_number_to_merge = 4;
options.compression = kNoCompression;
options.create_if_missing = true;
options = CurrentOptions(options);
DestroyAndReopen(options);
Random rnd(301);
std::vector<Iterator*> iters;
uint64_t active_mem;
uint64_t unflushed_mem;
uint64_t all_mem;
uint64_t prev_all_mem;
// Phase 0. The verify the initial value of all these properties are the same
// as we have no mem-tables.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(all_mem, active_mem);
ASSERT_EQ(all_mem, unflushed_mem);
// Phase 1. Simply issue Put() and expect "cur-size-all-mem-tables" equals to
// "size-all-mem-tables"
for (int r = 0; r < kNumRounds; ++r) {
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Make sure that there is no flush between getting the two properties.
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// in no iterator case, these two number should be the same.
ASSERT_EQ(unflushed_mem, all_mem);
}
prev_all_mem = all_mem;
// Phase 2. Keep issuing Put() but also create new iterators. This time we
// expect "size-all-mem-tables" > "cur-size-all-mem-tables".
for (int r = 0; r < kNumRounds; ++r) {
iters.push_back(db_->NewIterator(ReadOptions()));
for (int f = 0; f < kFlushesPerRound; ++f) {
for (int w = 0; w < kWritesPerFlush; ++w) {
Put(RandomString(&rnd, kKeySize), RandomString(&rnd, kValueSize));
}
}
// Force flush to prevent flush from happening between getting the
// properties or after getting the properties and before the new round.
Flush();
// In the second round, add iterators.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_GT(all_mem, active_mem);
ASSERT_GT(all_mem, unflushed_mem);
ASSERT_GT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Phase 3. Delete iterators and expect "size-all-mem-tables" shrinks
// whenever we release an iterator.
for (auto* iter : iters) {
delete iter;
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
// Expect the size shrinking
ASSERT_LT(all_mem, prev_all_mem);
prev_all_mem = all_mem;
}
// Expect all these three counters to be the same.
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
// Phase 5. Reopen, and expect all these three counters to be the same again.
Reopen(options);
dbfull()->GetIntProperty("rocksdb.cur-size-active-mem-table", &active_mem);
dbfull()->GetIntProperty("rocksdb.cur-size-all-mem-tables", &unflushed_mem);
dbfull()->GetIntProperty("rocksdb.size-all-mem-tables", &all_mem);
ASSERT_EQ(active_mem, unflushed_mem);
ASSERT_EQ(unflushed_mem, all_mem);
}
TEST_F(DBPropertiesTest, EstimatePendingCompBytes) {
// Set sizes to both background thread pool to be 1 and block them.
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
Options options = CurrentOptions();
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 2;
options.max_background_compactions = 1;
options.max_background_flushes = 1;
options.max_write_buffer_number = 10;
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_number_to_maintain = 0;
options.write_buffer_size = 1000000;
Reopen(options);
std::string big_value(1000000 * 2, 'x');
std::string num;
uint64_t int_num;
ASSERT_OK(dbfull()->Put(writeOpt, "k1", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k2", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_GT(int_num, 0U);
ASSERT_OK(dbfull()->Put(writeOpt, "k3", big_value));
Flush();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_GT(int_num, 0U);
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(dbfull()->GetIntProperty(
"rocksdb.estimate-pending-compaction-bytes", &int_num));
ASSERT_EQ(int_num, 0U);
}
TEST_F(DBPropertiesTest, EstimateCompressionRatio) {
if (!Snappy_Supported()) {
return;
}
const int kNumL0Files = 3;
const int kNumEntriesPerFile = 1000;
Options options = CurrentOptions();
options.compression_per_level = {kNoCompression, kSnappyCompression};
options.disable_auto_compactions = true;
options.num_levels = 2;
Reopen(options);
// compression ratio is -1.0 when no open files at level
ASSERT_EQ(CompressionRatioAtLevel(0), -1.0);
const std::string kVal(100, 'a');
for (int i = 0; i < kNumL0Files; ++i) {
for (int j = 0; j < kNumEntriesPerFile; ++j) {
// Put common data ("key") at end to prevent delta encoding from
// compressing the key effectively
std::string key = ToString(i) + ToString(j) + "key";
ASSERT_OK(dbfull()->Put(WriteOptions(), key, kVal));
}
Flush();
}
// no compression at L0, so ratio is less than one
ASSERT_LT(CompressionRatioAtLevel(0), 1.0);
ASSERT_GT(CompressionRatioAtLevel(0), 0.0);
ASSERT_EQ(CompressionRatioAtLevel(1), -1.0);
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_EQ(CompressionRatioAtLevel(0), -1.0);
// Data at L1 should be highly compressed thanks to Snappy and redundant data
// in values (ratio is 12.846 as of 4/19/2016).
ASSERT_GT(CompressionRatioAtLevel(1), 10.0);
}
#endif // ROCKSDB_LITE
class CountingUserTblPropCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return "CountingUserTblPropCollector"; }
Status Finish(UserCollectedProperties* properties) override {
std::string encoded;
PutVarint32(&encoded, count_);
*properties = UserCollectedProperties{
{"CountingUserTblPropCollector", 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 CountingUserTblPropCollectorFactory
: public TablePropertiesCollectorFactory {
public:
explicit CountingUserTblPropCollectorFactory(
uint32_t expected_column_family_id)
: expected_column_family_id_(expected_column_family_id),
num_created_(0) {}
virtual TablePropertiesCollector* CreateTablePropertiesCollector(
TablePropertiesCollectorFactory::Context context) override {
EXPECT_EQ(expected_column_family_id_, context.column_family_id);
num_created_++;
return new CountingUserTblPropCollector();
}
const char* Name() const override {
return "CountingUserTblPropCollectorFactory";
}
void set_expected_column_family_id(uint32_t v) {
expected_column_family_id_ = v;
}
uint32_t expected_column_family_id_;
uint32_t num_created_;
};
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(
TablePropertiesCollectorFactory::Context /*context*/) override {
return new CountingDeleteTabPropCollector();
}
const char* Name() const override {
return "CountingDeleteTabPropCollectorFactory";
}
};
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, GetUserDefinedTableProperties) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = (1 << 30);
options.table_properties_collector_factories.resize(1);
std::shared_ptr<CountingUserTblPropCollectorFactory> collector_factory =
std::make_shared<CountingUserTblPropCollectorFactory>(0);
options.table_properties_collector_factories[0] = collector_factory;
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("CountingUserTblPropCollector") !=
user_collected.end());
ASSERT_EQ(user_collected.at("CountingUserTblPropCollector"), "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);
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_GT(collector_factory->num_created_, 0U);
}
#endif // ROCKSDB_LITE
TEST_F(DBPropertiesTest, UserDefinedTablePropertiesContext) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 3;
options.table_properties_collector_factories.resize(1);
std::shared_ptr<CountingUserTblPropCollectorFactory> collector_factory =
std::make_shared<CountingUserTblPropCollectorFactory>(1);
options.table_properties_collector_factories[0] = collector_factory,
CreateAndReopenWithCF({"pikachu"}, options);
// Create 2 files
for (int table = 0; table < 2; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(1, ToString(table * 100 + i), "val");
}
Flush(1);
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
// Trigger automatic compactions.
for (int table = 0; table < 3; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(1, ToString(table * 100 + i), "val");
}
Flush(1);
dbfull()->TEST_WaitForCompact();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1]);
ASSERT_GT(collector_factory->num_created_, 0U);
// Come back to write to default column family
collector_factory->num_created_ = 0;
collector_factory->set_expected_column_family_id(0); // default CF
// Create 4 tables in default column family
for (int table = 0; table < 2; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(ToString(table * 100 + i), "val");
}
Flush();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
// Trigger automatic compactions.
for (int table = 0; table < 3; ++table) {
for (int i = 0; i < 10 + table; ++i) {
Put(ToString(table * 100 + i), "val");
}
Flush();
dbfull()->TEST_WaitForCompact();
}
ASSERT_GT(collector_factory->num_created_, 0U);
collector_factory->num_created_ = 0;
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_GT(collector_factory->num_created_, 0U);
}
#ifndef ROCKSDB_LITE
TEST_F(DBPropertiesTest, 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_pending_compaction_bytes_limit = 1024 * 1024;
options.num_levels = 8;
options.env = env_;
std::shared_ptr<TablePropertiesCollectorFactory> collector_factory =
std::make_shared<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);
get_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(get_perf_context()->internal_delete_skipped_count, 30u);
ASSERT_LT(get_perf_context()->internal_key_skipped_count, 30u);
SetPerfLevel(kDisable);
}
}
TEST_F(DBPropertiesTest, NeedCompactHintPersistentTest) {
Random rnd(301);
Options options;
options.create_if_missing = true;
options.max_write_buffer_number = 8;
options.level0_file_num_compaction_trigger = 10;
options.level0_slowdown_writes_trigger = 10;
options.level0_stop_writes_trigger = 10;
options.disable_auto_compactions = true;
options.env = env_;
std::shared_ptr<TablePropertiesCollectorFactory> collector_factory =
std::make_shared<CountingDeleteTabPropCollectorFactory>();
options.table_properties_collector_factories.resize(1);
options.table_properties_collector_factories[0] = collector_factory;
DestroyAndReopen(options);
const int kMaxKey = 100;
for (int i = 0; i < kMaxKey; i++) {
ASSERT_OK(Put(Key(i), ""));
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
for (int i = 1; i < kMaxKey - 1; i++) {
Delete(Key(i));
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ(NumTableFilesAtLevel(0), 2);
// Restart the DB. Although number of files didn't reach
// options.level0_file_num_compaction_trigger, compaction should
// still be triggered because of the need-compaction hint.
options.disable_auto_compactions = false;
Reopen(options);
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
{
SetPerfLevel(kEnableCount);
get_perf_context()->Reset();
int c = 0;
std::unique_ptr<Iterator> iter(db_->NewIterator(ReadOptions()));
for (iter->Seek(Key(0)); iter->Valid(); iter->Next()) {
c++;
}
ASSERT_EQ(c, 2);
ASSERT_EQ(get_perf_context()->internal_delete_skipped_count, 0);
// We iterate every key twice. Is it a bug?
ASSERT_LE(get_perf_context()->internal_key_skipped_count, 2);
SetPerfLevel(kDisable);
}
}
TEST_F(DBPropertiesTest, EstimateNumKeysUnderflow) {
Options options;
Reopen(options);
Put("foo", "bar");
Delete("foo");
Delete("foo");
uint64_t num_keys = 0;
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.estimate-num-keys", &num_keys));
ASSERT_EQ(0, num_keys);
}
TEST_F(DBPropertiesTest, EstimateOldestKeyTime) {
std::unique_ptr<MockTimeEnv> mock_env(new MockTimeEnv(Env::Default()));
uint64_t oldest_key_time = 0;
Options options;
options.env = mock_env.get();
// "rocksdb.estimate-oldest-key-time" only available to fifo compaction.
mock_env->set_current_time(100);
for (auto compaction : {kCompactionStyleLevel, kCompactionStyleUniversal,
kCompactionStyleNone}) {
options.compaction_style = compaction;
options.create_if_missing = true;
DestroyAndReopen(options);
ASSERT_OK(Put("foo", "bar"));
ASSERT_FALSE(dbfull()->GetIntProperty(
DB::Properties::kEstimateOldestKeyTime, &oldest_key_time));
}
options.compaction_style = kCompactionStyleFIFO;
options.compaction_options_fifo.ttl = 300;
options.compaction_options_fifo.allow_compaction = false;
DestroyAndReopen(options);
mock_env->set_current_time(100);
ASSERT_OK(Put("k1", "v1"));
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(100, oldest_key_time);
ASSERT_OK(Flush());
ASSERT_EQ("1", FilesPerLevel());
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(100, oldest_key_time);
mock_env->set_current_time(200);
ASSERT_OK(Put("k2", "v2"));
ASSERT_OK(Flush());
ASSERT_EQ("2", FilesPerLevel());
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(100, oldest_key_time);
mock_env->set_current_time(300);
ASSERT_OK(Put("k3", "v3"));
ASSERT_OK(Flush());
ASSERT_EQ("3", FilesPerLevel());
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(100, oldest_key_time);
mock_env->set_current_time(450);
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("2", FilesPerLevel());
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(200, oldest_key_time);
mock_env->set_current_time(550);
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("1", FilesPerLevel());
ASSERT_TRUE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
ASSERT_EQ(300, oldest_key_time);
mock_env->set_current_time(650);
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("", FilesPerLevel());
ASSERT_FALSE(dbfull()->GetIntProperty(DB::Properties::kEstimateOldestKeyTime,
&oldest_key_time));
// Close before mock_env destructs.
Close();
}
TEST_F(DBPropertiesTest, SstFilesSize) {
struct TestListener : public EventListener {
void OnCompactionCompleted(DB* db,
const CompactionJobInfo& /*info*/) override {
assert(callback_triggered == false);
assert(size_before_compaction > 0);
callback_triggered = true;
uint64_t total_sst_size = 0;
uint64_t live_sst_size = 0;
bool ok = db->GetIntProperty(DB::Properties::kTotalSstFilesSize,
&total_sst_size);
ASSERT_TRUE(ok);
// total_sst_size include files before and after compaction.
ASSERT_GT(total_sst_size, size_before_compaction);
ok =
db->GetIntProperty(DB::Properties::kLiveSstFilesSize, &live_sst_size);
ASSERT_TRUE(ok);
// live_sst_size only include files after compaction.
ASSERT_GT(live_sst_size, 0);
ASSERT_LT(live_sst_size, size_before_compaction);
}
uint64_t size_before_compaction = 0;
bool callback_triggered = false;
};
std::shared_ptr<TestListener> listener = std::make_shared<TestListener>();
Options options;
options.disable_auto_compactions = true;
options.listeners.push_back(listener);
Reopen(options);
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put("key" + ToString(i), std::string(1000, 'v')));
}
ASSERT_OK(Flush());
for (int i = 0; i < 5; i++) {
ASSERT_OK(Delete("key" + ToString(i)));
}
ASSERT_OK(Flush());
uint64_t sst_size;
bool ok = db_->GetIntProperty(DB::Properties::kTotalSstFilesSize, &sst_size);
ASSERT_TRUE(ok);
ASSERT_GT(sst_size, 0);
listener->size_before_compaction = sst_size;
// Compact to clean all keys and trigger listener.
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_TRUE(listener->callback_triggered);
}
TEST_F(DBPropertiesTest, BlockCacheProperties) {
Options options;
uint64_t value;
// Block cache properties are not available for tables other than
// block-based table.
options.table_factory.reset(NewPlainTableFactory());
Reopen(options);
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_FALSE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
options.table_factory.reset(NewCuckooTableFactory());
Reopen(options);
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_FALSE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
// Block cache properties are not available if block cache is not used.
BlockBasedTableOptions table_options;
table_options.no_block_cache = true;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_FALSE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_FALSE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
// Test with empty block cache.
constexpr size_t kCapacity = 100;
auto block_cache = NewLRUCache(kCapacity, 0 /*num_shard_bits*/);
table_options.block_cache = block_cache;
table_options.no_block_cache = false;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
Reopen(options);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_EQ(kCapacity, value);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_EQ(0, value);
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
ASSERT_EQ(0, value);
// Insert unpinned item to the cache and check size.
constexpr size_t kSize1 = 50;
block_cache->Insert("item1", nullptr /*value*/, kSize1, nullptr /*deleter*/);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_EQ(kCapacity, value);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_EQ(kSize1, value);
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
ASSERT_EQ(0, value);
// Insert pinned item to the cache and check size.
constexpr size_t kSize2 = 30;
Cache::Handle* item2 = nullptr;
block_cache->Insert("item2", nullptr /*value*/, kSize2, nullptr /*deleter*/,
&item2);
ASSERT_NE(nullptr, item2);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_EQ(kCapacity, value);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
ASSERT_EQ(kSize1 + kSize2, value);
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
ASSERT_EQ(kSize2, value);
// Insert another pinned item to make the cache over-sized.
constexpr size_t kSize3 = 80;
Cache::Handle* item3 = nullptr;
block_cache->Insert("item3", nullptr /*value*/, kSize3, nullptr /*deleter*/,
&item3);
ASSERT_NE(nullptr, item2);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_EQ(kCapacity, value);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
// Item 1 is evicted.
ASSERT_EQ(kSize2 + kSize3, value);
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
ASSERT_EQ(kSize2 + kSize3, value);
// Check size after release.
block_cache->Release(item2);
block_cache->Release(item3);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheCapacity, &value));
ASSERT_EQ(kCapacity, value);
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBlockCacheUsage, &value));
// item2 will be evicted, while item3 remain in cache after release.
ASSERT_EQ(kSize3, value);
ASSERT_TRUE(
db_->GetIntProperty(DB::Properties::kBlockCachePinnedUsage, &value));
ASSERT_EQ(0, value);
}
#endif // ROCKSDB_LITE
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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