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db_compaction_test.cc
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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 "db/db_test_util.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/concurrent_task_limiter.h"
#include "rocksdb/experimental.h"
#include "rocksdb/sst_file_writer.h"
#include "rocksdb/utilities/convenience.h"
#include "test_util/sync_point.h"
#include "util/concurrent_task_limiter_impl.h"
#include "util/random.h"
#include "utilities/fault_injection_env.h"
namespace ROCKSDB_NAMESPACE {
// SYNC_POINT is not supported in released Windows mode.
#if !defined(ROCKSDB_LITE)
class DBCompactionTest : public DBTestBase {
public:
DBCompactionTest() : DBTestBase("/db_compaction_test") {}
};
class DBCompactionTestWithParam
: public DBTestBase,
public testing::WithParamInterface<std::tuple<uint32_t, bool>> {
public:
DBCompactionTestWithParam() : DBTestBase("/db_compaction_test") {
max_subcompactions_ = std::get<0>(GetParam());
exclusive_manual_compaction_ = std::get<1>(GetParam());
}
// Required if inheriting from testing::WithParamInterface<>
static void SetUpTestCase() {}
static void TearDownTestCase() {}
uint32_t max_subcompactions_;
bool exclusive_manual_compaction_;
};
class DBCompactionDirectIOTest : public DBCompactionTest,
public ::testing::WithParamInterface<bool> {
public:
DBCompactionDirectIOTest() : DBCompactionTest() {}
};
namespace {
class FlushedFileCollector : public EventListener {
public:
FlushedFileCollector() {}
~FlushedFileCollector() override {}
void OnFlushCompleted(DB* /*db*/, const FlushJobInfo& info) override {
std::lock_guard<std::mutex> lock(mutex_);
flushed_files_.push_back(info.file_path);
}
std::vector<std::string> GetFlushedFiles() {
std::lock_guard<std::mutex> lock(mutex_);
std::vector<std::string> result;
for (auto fname : flushed_files_) {
result.push_back(fname);
}
return result;
}
void ClearFlushedFiles() { flushed_files_.clear(); }
private:
std::vector<std::string> flushed_files_;
std::mutex mutex_;
};
class CompactionStatsCollector : public EventListener {
public:
CompactionStatsCollector()
: compaction_completed_(static_cast<int>(CompactionReason::kNumOfReasons)) {
for (auto& v : compaction_completed_) {
v.store(0);
}
}
~CompactionStatsCollector() override {}
void OnCompactionCompleted(DB* /* db */,
const CompactionJobInfo& info) override {
int k = static_cast<int>(info.compaction_reason);
int num_of_reasons = static_cast<int>(CompactionReason::kNumOfReasons);
assert(k >= 0 && k < num_of_reasons);
compaction_completed_[k]++;
}
void OnExternalFileIngested(
DB* /* db */, const ExternalFileIngestionInfo& /* info */) override {
int k = static_cast<int>(CompactionReason::kExternalSstIngestion);
compaction_completed_[k]++;
}
void OnFlushCompleted(DB* /* db */, const FlushJobInfo& /* info */) override {
int k = static_cast<int>(CompactionReason::kFlush);
compaction_completed_[k]++;
}
int NumberOfCompactions(CompactionReason reason) const {
int num_of_reasons = static_cast<int>(CompactionReason::kNumOfReasons);
int k = static_cast<int>(reason);
assert(k >= 0 && k < num_of_reasons);
return compaction_completed_.at(k).load();
}
private:
std::vector<std::atomic<int>> compaction_completed_;
};
class SstStatsCollector : public EventListener {
public:
SstStatsCollector() : num_ssts_creation_started_(0) {}
void OnTableFileCreationStarted(
const TableFileCreationBriefInfo& /* info */) override {
++num_ssts_creation_started_;
}
int num_ssts_creation_started() { return num_ssts_creation_started_; }
private:
std::atomic<int> num_ssts_creation_started_;
};
static const int kCDTValueSize = 1000;
static const int kCDTKeysPerBuffer = 4;
static const int kCDTNumLevels = 8;
Options DeletionTriggerOptions(Options options) {
options.compression = kNoCompression;
options.write_buffer_size = kCDTKeysPerBuffer * (kCDTValueSize + 24);
options.min_write_buffer_number_to_merge = 1;
options.max_write_buffer_size_to_maintain = 0;
options.num_levels = kCDTNumLevels;
options.level0_file_num_compaction_trigger = 1;
options.target_file_size_base = options.write_buffer_size * 2;
options.target_file_size_multiplier = 2;
options.max_bytes_for_level_base =
options.target_file_size_base * options.target_file_size_multiplier;
options.max_bytes_for_level_multiplier = 2;
options.disable_auto_compactions = false;
return options;
}
bool HaveOverlappingKeyRanges(
const Comparator* c,
const SstFileMetaData& a, const SstFileMetaData& b) {
if (c->CompareWithoutTimestamp(a.smallestkey, b.smallestkey) >= 0) {
if (c->CompareWithoutTimestamp(a.smallestkey, b.largestkey) <= 0) {
// b.smallestkey <= a.smallestkey <= b.largestkey
return true;
}
} else if (c->CompareWithoutTimestamp(a.largestkey, b.smallestkey) >= 0) {
// a.smallestkey < b.smallestkey <= a.largestkey
return true;
}
if (c->CompareWithoutTimestamp(a.largestkey, b.largestkey) <= 0) {
if (c->CompareWithoutTimestamp(a.largestkey, b.smallestkey) >= 0) {
// b.smallestkey <= a.largestkey <= b.largestkey
return true;
}
} else if (c->CompareWithoutTimestamp(a.smallestkey, b.largestkey) <= 0) {
// a.smallestkey <= b.largestkey < a.largestkey
return true;
}
return false;
}
// Identifies all files between level "min_level" and "max_level"
// which has overlapping key range with "input_file_meta".
void GetOverlappingFileNumbersForLevelCompaction(
const ColumnFamilyMetaData& cf_meta,
const Comparator* comparator,
int min_level, int max_level,
const SstFileMetaData* input_file_meta,
std::set<std::string>* overlapping_file_names) {
std::set<const SstFileMetaData*> overlapping_files;
overlapping_files.insert(input_file_meta);
for (int m = min_level; m <= max_level; ++m) {
for (auto& file : cf_meta.levels[m].files) {
for (auto* included_file : overlapping_files) {
if (HaveOverlappingKeyRanges(
comparator, *included_file, file)) {
overlapping_files.insert(&file);
overlapping_file_names->insert(file.name);
break;
}
}
}
}
}
void VerifyCompactionResult(
const ColumnFamilyMetaData& cf_meta,
const std::set<std::string>& overlapping_file_numbers) {
#ifndef NDEBUG
for (auto& level : cf_meta.levels) {
for (auto& file : level.files) {
assert(overlapping_file_numbers.find(file.name) ==
overlapping_file_numbers.end());
}
}
#endif
}
/*
* Verifies compaction stats of cfd are valid.
*
* For each level of cfd, its compaction stats are valid if
* 1) sum(stat.counts) == stat.count, and
* 2) stat.counts[i] == collector.NumberOfCompactions(i)
*/
void VerifyCompactionStats(ColumnFamilyData& cfd,
const CompactionStatsCollector& collector) {
#ifndef NDEBUG
InternalStats* internal_stats_ptr = cfd.internal_stats();
ASSERT_TRUE(internal_stats_ptr != nullptr);
const std::vector<InternalStats::CompactionStats>& comp_stats =
internal_stats_ptr->TEST_GetCompactionStats();
const int num_of_reasons = static_cast<int>(CompactionReason::kNumOfReasons);
std::vector<int> counts(num_of_reasons, 0);
// Count the number of compactions caused by each CompactionReason across
// all levels.
for (const auto& stat : comp_stats) {
int sum = 0;
for (int i = 0; i < num_of_reasons; i++) {
counts[i] += stat.counts[i];
sum += stat.counts[i];
}
ASSERT_EQ(sum, stat.count);
}
// Verify InternalStats bookkeeping matches that of CompactionStatsCollector,
// assuming that all compactions complete.
for (int i = 0; i < num_of_reasons; i++) {
ASSERT_EQ(collector.NumberOfCompactions(static_cast<CompactionReason>(i)), counts[i]);
}
#endif /* NDEBUG */
}
const SstFileMetaData* PickFileRandomly(
const ColumnFamilyMetaData& cf_meta,
Random* rand,
int* level = nullptr) {
auto file_id = rand->Uniform(static_cast<int>(
cf_meta.file_count)) + 1;
for (auto& level_meta : cf_meta.levels) {
if (file_id <= level_meta.files.size()) {
if (level != nullptr) {
*level = level_meta.level;
}
auto result = rand->Uniform(file_id);
return &(level_meta.files[result]);
}
file_id -= static_cast<uint32_t>(level_meta.files.size());
}
assert(false);
return nullptr;
}
} // anonymous namespace
#ifndef ROCKSDB_VALGRIND_RUN
// All the TEST_P tests run once with sub_compactions disabled (i.e.
// options.max_subcompactions = 1) and once with it enabled
TEST_P(DBCompactionTestWithParam, CompactionDeletionTrigger) {
for (int tid = 0; tid < 3; ++tid) {
uint64_t db_size[2];
Options options = DeletionTriggerOptions(CurrentOptions());
options.max_subcompactions = max_subcompactions_;
if (tid == 1) {
// the following only disable stats update in DB::Open()
// and should not affect the result of this test.
options.skip_stats_update_on_db_open = true;
} else if (tid == 2) {
// third pass with universal compaction
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 1;
}
DestroyAndReopen(options);
Random rnd(301);
const int kTestSize = kCDTKeysPerBuffer * 1024;
std::vector<std::string> values;
for (int k = 0; k < kTestSize; ++k) {
values.push_back(rnd.RandomString(kCDTValueSize));
ASSERT_OK(Put(Key(k), values[k]));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[0] = Size(Key(0), Key(kTestSize - 1));
for (int k = 0; k < kTestSize; ++k) {
ASSERT_OK(Delete(Key(k)));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[1] = Size(Key(0), Key(kTestSize - 1));
// must have much smaller db size.
ASSERT_GT(db_size[0] / 3, db_size[1]);
}
}
#endif // ROCKSDB_VALGRIND_RUN
TEST_P(DBCompactionTestWithParam, CompactionsPreserveDeletes) {
// For each options type we test following
// - Enable preserve_deletes
// - write bunch of keys and deletes
// - Set start_seqnum to the beginning; compact; check that keys are present
// - rewind start_seqnum way forward; compact; check that keys are gone
for (int tid = 0; tid < 3; ++tid) {
Options options = DeletionTriggerOptions(CurrentOptions());
options.max_subcompactions = max_subcompactions_;
options.preserve_deletes=true;
options.num_levels = 2;
if (tid == 1) {
options.skip_stats_update_on_db_open = true;
} else if (tid == 2) {
// third pass with universal compaction
options.compaction_style = kCompactionStyleUniversal;
}
DestroyAndReopen(options);
Random rnd(301);
// highlight the default; all deletes should be preserved
SetPreserveDeletesSequenceNumber(0);
const int kTestSize = kCDTKeysPerBuffer;
std::vector<std::string> values;
for (int k = 0; k < kTestSize; ++k) {
values.push_back(rnd.RandomString(kCDTValueSize));
ASSERT_OK(Put(Key(k), values[k]));
}
for (int k = 0; k < kTestSize; ++k) {
ASSERT_OK(Delete(Key(k)));
}
// to ensure we tackle all tombstones
CompactRangeOptions cro;
cro.change_level = true;
cro.target_level = 2;
cro.bottommost_level_compaction =
BottommostLevelCompaction::kForceOptimized;
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->CompactRange(cro, nullptr, nullptr);
// check that normal user iterator doesn't see anything
Iterator* db_iter = dbfull()->NewIterator(ReadOptions());
int i = 0;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
i++;
}
ASSERT_EQ(i, 0);
delete db_iter;
// check that iterator that sees internal keys sees tombstones
ReadOptions ro;
ro.iter_start_seqnum=1;
db_iter = dbfull()->NewIterator(ro);
i = 0;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
i++;
}
ASSERT_EQ(i, 4);
delete db_iter;
// now all deletes should be gone
SetPreserveDeletesSequenceNumber(100000000);
dbfull()->CompactRange(cro, nullptr, nullptr);
db_iter = dbfull()->NewIterator(ro);
i = 0;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
i++;
}
ASSERT_EQ(i, 0);
delete db_iter;
}
}
TEST_F(DBCompactionTest, SkipStatsUpdateTest) {
// This test verify UpdateAccumulatedStats is not on
// if options.skip_stats_update_on_db_open = true
// The test will need to be updated if the internal behavior changes.
Options options = DeletionTriggerOptions(CurrentOptions());
options.disable_auto_compactions = true;
options.env = env_;
DestroyAndReopen(options);
Random rnd(301);
const int kTestSize = kCDTKeysPerBuffer * 512;
std::vector<std::string> values;
for (int k = 0; k < kTestSize; ++k) {
values.push_back(rnd.RandomString(kCDTValueSize));
ASSERT_OK(Put(Key(k), values[k]));
}
ASSERT_OK(Flush());
Close();
int update_acc_stats_called = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"VersionStorageInfo::UpdateAccumulatedStats",
[&](void* /* arg */) { ++update_acc_stats_called; });
SyncPoint::GetInstance()->EnableProcessing();
// Reopen the DB with stats-update disabled
options.skip_stats_update_on_db_open = true;
options.max_open_files = 20;
Reopen(options);
ASSERT_EQ(update_acc_stats_called, 0);
// Repeat the reopen process, but this time we enable
// stats-update.
options.skip_stats_update_on_db_open = false;
Reopen(options);
ASSERT_GT(update_acc_stats_called, 0);
SyncPoint::GetInstance()->ClearAllCallBacks();
SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, TestTableReaderForCompaction) {
Options options = CurrentOptions();
options.env = env_;
options.new_table_reader_for_compaction_inputs = true;
options.max_open_files = 20;
options.level0_file_num_compaction_trigger = 3;
DestroyAndReopen(options);
Random rnd(301);
int num_table_cache_lookup = 0;
int num_new_table_reader = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"TableCache::FindTable:0", [&](void* arg) {
assert(arg != nullptr);
bool no_io = *(reinterpret_cast<bool*>(arg));
if (!no_io) {
// filter out cases for table properties queries.
num_table_cache_lookup++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"TableCache::GetTableReader:0",
[&](void* /*arg*/) { num_new_table_reader++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
for (int k = 0; k < options.level0_file_num_compaction_trigger; ++k) {
ASSERT_OK(Put(Key(k), Key(k)));
ASSERT_OK(Put(Key(10 - k), "bar"));
if (k < options.level0_file_num_compaction_trigger - 1) {
num_table_cache_lookup = 0;
Flush();
dbfull()->TEST_WaitForCompact();
// preloading iterator issues one table cache lookup and create
// a new table reader, if not preloaded.
int old_num_table_cache_lookup = num_table_cache_lookup;
ASSERT_GE(num_table_cache_lookup, 1);
ASSERT_EQ(num_new_table_reader, 1);
num_table_cache_lookup = 0;
num_new_table_reader = 0;
ASSERT_EQ(Key(k), Get(Key(k)));
// lookup iterator from table cache and no need to create a new one.
ASSERT_EQ(old_num_table_cache_lookup + num_table_cache_lookup, 2);
ASSERT_EQ(num_new_table_reader, 0);
}
}
num_table_cache_lookup = 0;
num_new_table_reader = 0;
Flush();
dbfull()->TEST_WaitForCompact();
// Preloading iterator issues one table cache lookup and creates
// a new table reader. One file is created for flush and one for compaction.
// Compaction inputs make no table cache look-up for data/range deletion
// iterators
// May preload table cache too.
ASSERT_GE(num_table_cache_lookup, 2);
int old_num_table_cache_lookup2 = num_table_cache_lookup;
// Create new iterator for:
// (1) 1 for verifying flush results
// (2) 1 for verifying compaction results.
// (3) New TableReaders will not be created for compaction inputs
ASSERT_EQ(num_new_table_reader, 2);
num_table_cache_lookup = 0;
num_new_table_reader = 0;
ASSERT_EQ(Key(1), Get(Key(1)));
ASSERT_EQ(num_table_cache_lookup + old_num_table_cache_lookup2, 5);
ASSERT_EQ(num_new_table_reader, 0);
num_table_cache_lookup = 0;
num_new_table_reader = 0;
CompactRangeOptions cro;
cro.change_level = true;
cro.target_level = 2;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForceOptimized;
db_->CompactRange(cro, nullptr, nullptr);
// Only verifying compaction outputs issues one table cache lookup
// for both data block and range deletion block).
// May preload table cache too.
ASSERT_GE(num_table_cache_lookup, 1);
old_num_table_cache_lookup2 = num_table_cache_lookup;
// One for verifying compaction results.
// No new iterator created for compaction.
ASSERT_EQ(num_new_table_reader, 1);
num_table_cache_lookup = 0;
num_new_table_reader = 0;
ASSERT_EQ(Key(1), Get(Key(1)));
ASSERT_EQ(num_table_cache_lookup + old_num_table_cache_lookup2, 3);
ASSERT_EQ(num_new_table_reader, 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_P(DBCompactionTestWithParam, CompactionDeletionTriggerReopen) {
for (int tid = 0; tid < 2; ++tid) {
uint64_t db_size[3];
Options options = DeletionTriggerOptions(CurrentOptions());
options.max_subcompactions = max_subcompactions_;
if (tid == 1) {
// second pass with universal compaction
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 1;
}
DestroyAndReopen(options);
Random rnd(301);
// round 1 --- insert key/value pairs.
const int kTestSize = kCDTKeysPerBuffer * 512;
std::vector<std::string> values;
for (int k = 0; k < kTestSize; ++k) {
values.push_back(rnd.RandomString(kCDTValueSize));
ASSERT_OK(Put(Key(k), values[k]));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[0] = Size(Key(0), Key(kTestSize - 1));
Close();
// round 2 --- disable auto-compactions and issue deletions.
options.create_if_missing = false;
options.disable_auto_compactions = true;
Reopen(options);
for (int k = 0; k < kTestSize; ++k) {
ASSERT_OK(Delete(Key(k)));
}
db_size[1] = Size(Key(0), Key(kTestSize - 1));
Close();
// as auto_compaction is off, we shouldn't see too much reduce
// in db size.
ASSERT_LT(db_size[0] / 3, db_size[1]);
// round 3 --- reopen db with auto_compaction on and see if
// deletion compensation still work.
options.disable_auto_compactions = false;
Reopen(options);
// insert relatively small amount of data to trigger auto compaction.
for (int k = 0; k < kTestSize / 10; ++k) {
ASSERT_OK(Put(Key(k), values[k]));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[2] = Size(Key(0), Key(kTestSize - 1));
// this time we're expecting significant drop in size.
ASSERT_GT(db_size[0] / 3, db_size[2]);
}
}
TEST_F(DBCompactionTest, CompactRangeBottomPri) {
ASSERT_OK(Put(Key(50), ""));
ASSERT_OK(Flush());
ASSERT_OK(Put(Key(100), ""));
ASSERT_OK(Flush());
ASSERT_OK(Put(Key(200), ""));
ASSERT_OK(Flush());
{
CompactRangeOptions cro;
cro.change_level = true;
cro.target_level = 2;
dbfull()->CompactRange(cro, nullptr, nullptr);
}
ASSERT_EQ("0,0,3", FilesPerLevel(0));
ASSERT_OK(Put(Key(1), ""));
ASSERT_OK(Put(Key(199), ""));
ASSERT_OK(Flush());
ASSERT_OK(Put(Key(2), ""));
ASSERT_OK(Put(Key(199), ""));
ASSERT_OK(Flush());
ASSERT_EQ("2,0,3", FilesPerLevel(0));
// Now we have 2 L0 files, and 3 L2 files, and a manual compaction will
// be triggered.
// Two compaction jobs will run. One compacts 2 L0 files in Low Pri Pool
// and one compact to L2 in bottom pri pool.
int low_pri_count = 0;
int bottom_pri_count = 0;
SyncPoint::GetInstance()->SetCallBack(
"ThreadPoolImpl::Impl::BGThread:BeforeRun", [&](void* arg) {
Env::Priority* pri = reinterpret_cast<Env::Priority*>(arg);
// First time is low pri pool in the test case.
if (low_pri_count == 0 && bottom_pri_count == 0) {
ASSERT_EQ(Env::Priority::LOW, *pri);
}
if (*pri == Env::Priority::LOW) {
low_pri_count++;
} else {
bottom_pri_count++;
}
});
SyncPoint::GetInstance()->EnableProcessing();
env_->SetBackgroundThreads(1, Env::Priority::BOTTOM);
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ(1, low_pri_count);
ASSERT_EQ(1, bottom_pri_count);
ASSERT_EQ("0,0,2", FilesPerLevel(0));
// Recompact bottom most level uses bottom pool
CompactRangeOptions cro;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForce;
dbfull()->CompactRange(cro, nullptr, nullptr);
ASSERT_EQ(1, low_pri_count);
ASSERT_EQ(2, bottom_pri_count);
env_->SetBackgroundThreads(0, Env::Priority::BOTTOM);
dbfull()->CompactRange(cro, nullptr, nullptr);
// Low pri pool is used if bottom pool has size 0.
ASSERT_EQ(2, low_pri_count);
ASSERT_EQ(2, bottom_pri_count);
SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, DisableStatsUpdateReopen) {
uint64_t db_size[3];
for (int test = 0; test < 2; ++test) {
Options options = DeletionTriggerOptions(CurrentOptions());
options.skip_stats_update_on_db_open = (test == 0);
env_->random_read_counter_.Reset();
DestroyAndReopen(options);
Random rnd(301);
// round 1 --- insert key/value pairs.
const int kTestSize = kCDTKeysPerBuffer * 512;
std::vector<std::string> values;
for (int k = 0; k < kTestSize; ++k) {
values.push_back(rnd.RandomString(kCDTValueSize));
ASSERT_OK(Put(Key(k), values[k]));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[0] = Size(Key(0), Key(kTestSize - 1));
Close();
// round 2 --- disable auto-compactions and issue deletions.
options.create_if_missing = false;
options.disable_auto_compactions = true;
env_->random_read_counter_.Reset();
Reopen(options);
for (int k = 0; k < kTestSize; ++k) {
ASSERT_OK(Delete(Key(k)));
}
db_size[1] = Size(Key(0), Key(kTestSize - 1));
Close();
// as auto_compaction is off, we shouldn't see too much reduce
// in db size.
ASSERT_LT(db_size[0] / 3, db_size[1]);
// round 3 --- reopen db with auto_compaction on and see if
// deletion compensation still work.
options.disable_auto_compactions = false;
Reopen(options);
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
db_size[2] = Size(Key(0), Key(kTestSize - 1));
if (options.skip_stats_update_on_db_open) {
// If update stats on DB::Open is disable, we don't expect
// deletion entries taking effect.
ASSERT_LT(db_size[0] / 3, db_size[2]);
} else {
// Otherwise, we should see a significant drop in db size.
ASSERT_GT(db_size[0] / 3, db_size[2]);
}
}
}
TEST_P(DBCompactionTestWithParam, CompactionTrigger) {
const int kNumKeysPerFile = 100;
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.num_levels = 3;
options.level0_file_num_compaction_trigger = 3;
options.max_subcompactions = max_subcompactions_;
options.memtable_factory.reset(new SpecialSkipListFactory(kNumKeysPerFile));
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
for (int num = 0; num < options.level0_file_num_compaction_trigger - 1;
num++) {
std::vector<std::string> values;
// Write 100KB (100 values, each 1K)
for (int i = 0; i < kNumKeysPerFile; i++) {
values.push_back(rnd.RandomString(990));
ASSERT_OK(Put(1, Key(i), values[i]));
}
// put extra key to trigger flush
ASSERT_OK(Put(1, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 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 < kNumKeysPerFile; i++) {
values.push_back(rnd.RandomString(990));
ASSERT_OK(Put(1, Key(i), values[i]));
}
// put extra key to trigger flush
ASSERT_OK(Put(1, "", ""));
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
ASSERT_EQ(NumTableFilesAtLevel(1, 1), 1);
}
TEST_F(DBCompactionTest, BGCompactionsAllowed) {
// Create several column families. Make compaction triggers in all of them
// and see number of compactions scheduled to be less than allowed.
const int kNumKeysPerFile = 100;
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.num_levels = 3;
// Should speed up compaction when there are 4 files.
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 20;
options.soft_pending_compaction_bytes_limit = 1 << 30; // Infinitely large
options.max_background_compactions = 3;
options.memtable_factory.reset(new SpecialSkipListFactory(kNumKeysPerFile));
// Block all threads in thread pool.
const size_t kTotalTasks = 4;
env_->SetBackgroundThreads(4, Env::LOW);
test::SleepingBackgroundTask sleeping_tasks[kTotalTasks];
for (size_t i = 0; i < kTotalTasks; i++) {
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_tasks[i], Env::Priority::LOW);
sleeping_tasks[i].WaitUntilSleeping();
}
CreateAndReopenWithCF({"one", "two", "three"}, options);
Random rnd(301);
for (int cf = 0; cf < 4; cf++) {
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
for (int i = 0; i < kNumKeysPerFile; i++) {
ASSERT_OK(Put(cf, Key(i), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(cf, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[cf]);
ASSERT_EQ(NumTableFilesAtLevel(0, cf), num + 1);
}
}
// Now all column families qualify compaction but only one should be
// scheduled, because no column family hits speed up condition.
ASSERT_EQ(1u, env_->GetThreadPoolQueueLen(Env::Priority::LOW));
// Create two more files for one column family, which triggers speed up
// condition, three compactions will be scheduled.
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
for (int i = 0; i < kNumKeysPerFile; i++) {
ASSERT_OK(Put(2, Key(i), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(2, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[2]);
ASSERT_EQ(options.level0_file_num_compaction_trigger + num + 1,
NumTableFilesAtLevel(0, 2));
}
ASSERT_EQ(3U, env_->GetThreadPoolQueueLen(Env::Priority::LOW));
// Unblock all threads to unblock all compactions.
for (size_t i = 0; i < kTotalTasks; i++) {
sleeping_tasks[i].WakeUp();
sleeping_tasks[i].WaitUntilDone();
}
dbfull()->TEST_WaitForCompact();
// Verify number of compactions allowed will come back to 1.
for (size_t i = 0; i < kTotalTasks; i++) {
sleeping_tasks[i].Reset();
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_tasks[i], Env::Priority::LOW);
sleeping_tasks[i].WaitUntilSleeping();
}
for (int cf = 0; cf < 4; cf++) {
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
for (int i = 0; i < kNumKeysPerFile; i++) {
ASSERT_OK(Put(cf, Key(i), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(cf, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[cf]);
ASSERT_EQ(NumTableFilesAtLevel(0, cf), num + 1);
}
}
// Now all column families qualify compaction but only one should be
// scheduled, because no column family hits speed up condition.
ASSERT_EQ(1U, env_->GetThreadPoolQueueLen(Env::Priority::LOW));
for (size_t i = 0; i < kTotalTasks; i++) {
sleeping_tasks[i].WakeUp();
sleeping_tasks[i].WaitUntilDone();
}
}
TEST_P(DBCompactionTestWithParam, CompactionsGenerateMultipleFiles) {
Options options = CurrentOptions();
options.write_buffer_size = 100000000; // Large write buffer
options.max_subcompactions = max_subcompactions_;
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(rnd.RandomString(100000));
ASSERT_OK(Put(1, Key(i), values[i]));
}
// Reopening moves updates to level-0
ReopenWithColumnFamilies({"default", "pikachu"}, options);
dbfull()->TEST_CompactRange(0, nullptr, nullptr, handles_[1],
true /* disallow trivial move */);
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
ASSERT_GT(NumTableFilesAtLevel(1, 1), 1);
for (int i = 0; i < 80; i++) {
ASSERT_EQ(Get(1, Key(i)), values[i]);
}
}
TEST_F(DBCompactionTest, MinorCompactionsHappen) {
do {
Options options = CurrentOptions();
options.write_buffer_size = 10000;
CreateAndReopenWithCF({"pikachu"}, options);
const int N = 500;
int starting_num_tables = TotalTableFiles(1);
for (int i = 0; i < N; i++) {
ASSERT_OK(Put(1, Key(i), Key(i) + std::string(1000, 'v')));
}
int ending_num_tables = TotalTableFiles(1);
ASSERT_GT(ending_num_tables, starting_num_tables);
for (int i = 0; i < N; i++) {
ASSERT_EQ(Key(i) + std::string(1000, 'v'), Get(1, Key(i)));
}
ReopenWithColumnFamilies({"default", "pikachu"}, options);
for (int i = 0; i < N; i++) {
ASSERT_EQ(Key(i) + std::string(1000, 'v'), Get(1, Key(i)));
}
} while (ChangeCompactOptions());
}
TEST_F(DBCompactionTest, UserKeyCrossFile1) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 3;
DestroyAndReopen(options);
// create first file and flush to l0
Put("4", "A");
Put("3", "A");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
Put("2", "A");
Delete("3");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ("NOT_FOUND", Get("3"));
// move both files down to l1
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ("NOT_FOUND", Get("3"));
for (int i = 0; i < 3; i++) {
Put("2", "B");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("NOT_FOUND", Get("3"));
}
TEST_F(DBCompactionTest, UserKeyCrossFile2) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 3;
DestroyAndReopen(options);
// create first file and flush to l0
Put("4", "A");
Put("3", "A");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
Put("2", "A");
SingleDelete("3");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ("NOT_FOUND", Get("3"));
// move both files down to l1
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_EQ("NOT_FOUND", Get("3"));
for (int i = 0; i < 3; i++) {
Put("2", "B");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("NOT_FOUND", Get("3"));
}
TEST_F(DBCompactionTest, CompactionSstPartitioner) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 3;
std::shared_ptr<SstPartitionerFactory> factory(
NewSstPartitionerFixedPrefixFactory(4));
options.sst_partitioner_factory = factory;
DestroyAndReopen(options);
// create first file and flush to l0
Put("aaaa1", "A");
Put("bbbb1", "B");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
Put("aaaa1", "A2");
Flush();
dbfull()->TEST_WaitForFlushMemTable();
// move both files down to l1