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rocksdb/db/db_compaction_test.cc
Yanqin Jin 0c05624d50 Compaction with timestamp: input boundaries (#6645) 
Summary:
Towards making compaction logic compatible with user timestamp.
When computing boundaries and overlapping ranges for inputs of compaction, We need to compare SSTs by user key without timestamp.

Test plan (devserver):
```
make check
```
Several individual tests:
```
./version_set_test --gtest_filter=VersionStorageInfoTimestampTest.GetOverlappingInputs
./db_with_timestamp_compaction_test
./db_with_timestamp_basic_test
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6645

Reviewed By: ltamasi

Differential Revision: D20960012

Pulled By: riversand963

fbshipit-source-id: ad377fa9eb481bf7a8a3e1824aaade48cdc653a4
2020-04-10 16:05:49 -07:00

5234 lines
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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/fault_injection_test_env.h"
#include "test_util/sync_point.h"
#include "util/concurrent_task_limiter_impl.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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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(RandomString(&rnd, 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, ZeroSeqIdCompaction) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 3;
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
// compaction options
CompactionOptions compact_opt;
compact_opt.compression = kNoCompression;
compact_opt.output_file_size_limit = 4096;
const size_t key_len =
static_cast<size_t>(compact_opt.output_file_size_limit) / 5;
DestroyAndReopen(options);
std::vector<const Snapshot*> snaps;
// create first file and flush to l0
for (auto& key : {"1", "2", "3", "3", "3", "3"}) {
Put(key, std::string(key_len, 'A'));
snaps.push_back(dbfull()->GetSnapshot());
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
// create second file and flush to l0
for (auto& key : {"3", "4", "5", "6", "7", "8"}) {
Put(key, std::string(key_len, 'A'));
snaps.push_back(dbfull()->GetSnapshot());
}
Flush();
dbfull()->TEST_WaitForFlushMemTable();
// move both files down to l1
dbfull()->CompactFiles(compact_opt, collector->GetFlushedFiles(), 1);
// release snap so that first instance of key(3) can have seqId=0
for (auto snap : snaps) {
dbfull()->ReleaseSnapshot(snap);
}
// create 3 files in l0 so to trigger compaction
for (int i = 0; i < options.level0_file_num_compaction_trigger; i++) {
Put("2", std::string(1, 'A'));
Flush();
dbfull()->TEST_WaitForFlushMemTable();
}
dbfull()->TEST_WaitForCompact();
ASSERT_OK(Put("", ""));
}
TEST_F(DBCompactionTest, ManualCompactionUnknownOutputSize) {
// github issue #2249
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.level0_file_num_compaction_trigger = 3;
DestroyAndReopen(options);
// create two files in l1 that we can compact
for (int i = 0; i < 2; ++i) {
for (int j = 0; j < options.level0_file_num_compaction_trigger; j++) {
// make l0 files' ranges overlap to avoid trivial move
Put(std::to_string(2 * i), std::string(1, 'A'));
Put(std::to_string(2 * i + 1), std::string(1, 'A'));
Flush();
dbfull()->TEST_WaitForFlushMemTable();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0, 0), 0);
ASSERT_EQ(NumTableFilesAtLevel(1, 0), i + 1);
}
ColumnFamilyMetaData cf_meta;
dbfull()->GetColumnFamilyMetaData(dbfull()->DefaultColumnFamily(), &cf_meta);
ASSERT_EQ(2, cf_meta.levels[1].files.size());
std::vector<std::string> input_filenames;
for (const auto& sst_file : cf_meta.levels[1].files) {
input_filenames.push_back(sst_file.name);
}
// note CompactionOptions::output_file_size_limit is unset.
CompactionOptions compact_opt;
compact_opt.compression = kNoCompression;
dbfull()->CompactFiles(compact_opt, input_filenames, 1);
}
// Check that writes done during a memtable compaction are recovered
// if the database is shutdown during the memtable compaction.
TEST_F(DBCompactionTest, RecoverDuringMemtableCompaction) {
do {
Options options = CurrentOptions();
options.env = env_;
CreateAndReopenWithCF({"pikachu"}, options);
// Trigger a long memtable compaction and reopen the database during it
ASSERT_OK(Put(1, "foo", "v1")); // Goes to 1st log file
ASSERT_OK(Put(1, "big1", std::string(10000000, 'x'))); // Fills memtable
ASSERT_OK(Put(1, "big2", std::string(1000, 'y'))); // Triggers compaction
ASSERT_OK(Put(1, "bar", "v2")); // Goes to new log file
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v2", Get(1, "bar"));
ASSERT_EQ(std::string(10000000, 'x'), Get(1, "big1"));
ASSERT_EQ(std::string(1000, 'y'), Get(1, "big2"));
} while (ChangeOptions());
}
TEST_P(DBCompactionTestWithParam, TrivialMoveOneFile) {
int32_t trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.write_buffer_size = 100000000;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
int32_t num_keys = 80;
int32_t value_size = 100 * 1024; // 100 KB
Random rnd(301);
std::vector<std::string> values;
for (int i = 0; i < num_keys; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(Key(i), values[i]));
}
// Reopening moves updates to L0
Reopen(options);
ASSERT_EQ(NumTableFilesAtLevel(0, 0), 1); // 1 file in L0
ASSERT_EQ(NumTableFilesAtLevel(1, 0), 0); // 0 files in L1
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 1U);
LiveFileMetaData level0_file = metadata[0]; // L0 file meta
CompactRangeOptions cro;
cro.exclusive_manual_compaction = exclusive_manual_compaction_;
// Compaction will initiate a trivial move from L0 to L1
dbfull()->CompactRange(cro, nullptr, nullptr);
// File moved From L0 to L1
ASSERT_EQ(NumTableFilesAtLevel(0, 0), 0); // 0 files in L0
ASSERT_EQ(NumTableFilesAtLevel(1, 0), 1); // 1 file in L1
metadata.clear();
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 1U);
ASSERT_EQ(metadata[0].name /* level1_file.name */, level0_file.name);
ASSERT_EQ(metadata[0].size /* level1_file.size */, level0_file.size);
for (int i = 0; i < num_keys; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
ASSERT_EQ(trivial_move, 1);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, TrivialMoveNonOverlappingFiles) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.write_buffer_size = 10 * 1024 * 1024;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
// non overlapping ranges
std::vector<std::pair<int32_t, int32_t>> ranges = {
{100, 199},
{300, 399},
{0, 99},
{200, 299},
{600, 699},
{400, 499},
{500, 550},
{551, 599},
};
int32_t value_size = 10 * 1024; // 10 KB
Random rnd(301);
std::map<int32_t, std::string> values;
for (size_t i = 0; i < ranges.size(); i++) {
for (int32_t j = ranges[i].first; j <= ranges[i].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()); // Multiple files in L0
ASSERT_EQ(NumTableFilesAtLevel(1, 0), 0); // No files in L1
CompactRangeOptions cro;
cro.exclusive_manual_compaction = exclusive_manual_compaction_;
// Since data is non-overlapping we expect compaction to initiate
// a trivial move
db_->CompactRange(cro, nullptr, nullptr);
// We expect that all the files were trivially moved from L0 to L1
ASSERT_EQ(NumTableFilesAtLevel(0, 0), 0);
ASSERT_EQ(NumTableFilesAtLevel(1, 0) /* level1_files */, level0_files);
for (size_t i = 0; i < ranges.size(); i++) {
for (int32_t j = ranges[i].first; j <= ranges[i].second; j++) {
ASSERT_EQ(Get(Key(j)), values[j]);
}
}
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
trivial_move = 0;
non_trivial_move = 0;
values.clear();
DestroyAndReopen(options);
// Same ranges as above but overlapping
ranges = {
{100, 199},
{300, 399},
{0, 99},
{200, 299},
{600, 699},
{400, 499},
{500, 560}, // this range overlap with the next one
{551, 599},
};
for (size_t i = 0; i < ranges.size(); i++) {
for (int32_t j = ranges[i].first; j <= ranges[i].second; j++) {
values[j] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(j), values[j]));
}
ASSERT_OK(Flush());
}
db_->CompactRange(cro, nullptr, nullptr);
for (size_t i = 0; i < ranges.size(); i++) {
for (int32_t j = ranges[i].first; j <= ranges[i].second; j++) {
ASSERT_EQ(Get(Key(j)), values[j]);
}
}
ASSERT_EQ(trivial_move, 0);
ASSERT_EQ(non_trivial_move, 1);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, TrivialMoveTargetLevel) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.write_buffer_size = 10 * 1024 * 1024;
options.num_levels = 7;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
// Add 2 non-overlapping files
Random rnd(301);
std::map<int32_t, std::string> values;
// file 1 [0 => 300]
for (int32_t i = 0; i <= 300; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 2 [600 => 700]
for (int32_t i = 600; i <= 700; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 2 files in L0
ASSERT_EQ("2", FilesPerLevel(0));
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 6;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
// 2 files in L6
ASSERT_EQ("0,0,0,0,0,0,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
for (int32_t i = 0; i <= 300; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
for (int32_t i = 600; i <= 700; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
}
TEST_P(DBCompactionTestWithParam, ManualCompactionPartial) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
bool first = true;
// Purpose of dependencies:
// 4 -> 1: ensure the order of two non-trivial compactions
// 5 -> 2 and 5 -> 3: ensure we do a check before two non-trivial compactions
// are installed
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompaction::ManualPartial:4", "DBCompaction::ManualPartial:1"},
{"DBCompaction::ManualPartial:5", "DBCompaction::ManualPartial:2"},
{"DBCompaction::ManualPartial:5", "DBCompaction::ManualPartial:3"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial:AfterRun", [&](void* /*arg*/) {
if (first) {
first = false;
TEST_SYNC_POINT("DBCompaction::ManualPartial:4");
TEST_SYNC_POINT("DBCompaction::ManualPartial:3");
} else { // second non-trivial compaction
TEST_SYNC_POINT("DBCompaction::ManualPartial:2");
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.write_buffer_size = 10 * 1024 * 1024;
options.num_levels = 7;
options.max_subcompactions = max_subcompactions_;
options.level0_file_num_compaction_trigger = 3;
options.max_background_compactions = 3;
options.target_file_size_base = 1 << 23; // 8 MB
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
// Add 2 non-overlapping files
Random rnd(301);
std::map<int32_t, std::string> values;
// file 1 [0 => 100]
for (int32_t i = 0; i < 100; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 2 [100 => 300]
for (int32_t i = 100; i < 300; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 2 files in L0
ASSERT_EQ("2", FilesPerLevel(0));
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 6;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
// Trivial move the two non-overlapping files to level 6
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
// 2 files in L6
ASSERT_EQ("0,0,0,0,0,0,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
// file 3 [ 0 => 200]
for (int32_t i = 0; i < 200; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 1 files in L0
ASSERT_EQ("1,0,0,0,0,0,2", FilesPerLevel(0));
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr, false));
ASSERT_OK(dbfull()->TEST_CompactRange(1, nullptr, nullptr, nullptr, false));
ASSERT_OK(dbfull()->TEST_CompactRange(2, nullptr, nullptr, nullptr, false));
ASSERT_OK(dbfull()->TEST_CompactRange(3, nullptr, nullptr, nullptr, false));
ASSERT_OK(dbfull()->TEST_CompactRange(4, nullptr, nullptr, nullptr, false));
// 2 files in L6, 1 file in L5
ASSERT_EQ("0,0,0,0,0,1,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 6);
ASSERT_EQ(non_trivial_move, 0);
ROCKSDB_NAMESPACE::port::Thread threads([&] {
compact_options.change_level = false;
compact_options.exclusive_manual_compaction = false;
std::string begin_string = Key(0);
std::string end_string = Key(199);
Slice begin(begin_string);
Slice end(end_string);
// First non-trivial compaction is triggered
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
});
TEST_SYNC_POINT("DBCompaction::ManualPartial:1");
// file 4 [300 => 400)
for (int32_t i = 300; i <= 400; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 5 [400 => 500)
for (int32_t i = 400; i <= 500; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 6 [500 => 600)
for (int32_t i = 500; i <= 600; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
// Second non-trivial compaction is triggered
ASSERT_OK(Flush());
// Before two non-trivial compactions are installed, there are 3 files in L0
ASSERT_EQ("3,0,0,0,0,1,2", FilesPerLevel(0));
TEST_SYNC_POINT("DBCompaction::ManualPartial:5");
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
// After two non-trivial compactions are installed, there is 1 file in L6, and
// 1 file in L1
ASSERT_EQ("0,1,0,0,0,0,1", FilesPerLevel(0));
threads.join();
for (int32_t i = 0; i < 600; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
}
// Disable as the test is flaky.
TEST_F(DBCompactionTest, DISABLED_ManualPartialFill) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
bool first = true;
bool second = true;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompaction::PartialFill:4", "DBCompaction::PartialFill:1"},
{"DBCompaction::PartialFill:2", "DBCompaction::PartialFill:3"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial:AfterRun", [&](void* /*arg*/) {
if (first) {
TEST_SYNC_POINT("DBCompaction::PartialFill:4");
first = false;
TEST_SYNC_POINT("DBCompaction::PartialFill:3");
} else if (second) {
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.write_buffer_size = 10 * 1024 * 1024;
options.max_bytes_for_level_multiplier = 2;
options.num_levels = 4;
options.level0_file_num_compaction_trigger = 3;
options.max_background_compactions = 3;
DestroyAndReopen(options);
// make sure all background compaction jobs can be scheduled
auto stop_token =
dbfull()->TEST_write_controler().GetCompactionPressureToken();
int32_t value_size = 10 * 1024; // 10 KB
// Add 2 non-overlapping files
Random rnd(301);
std::map<int32_t, std::string> values;
// file 1 [0 => 100]
for (int32_t i = 0; i < 100; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 2 [100 => 300]
for (int32_t i = 100; i < 300; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 2 files in L0
ASSERT_EQ("2", FilesPerLevel(0));
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 2;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
// 2 files in L2
ASSERT_EQ("0,0,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
// file 3 [ 0 => 200]
for (int32_t i = 0; i < 200; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 2 files in L2, 1 in L0
ASSERT_EQ("1,0,2", FilesPerLevel(0));
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr, false));
// 2 files in L2, 1 in L1
ASSERT_EQ("0,1,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 2);
ASSERT_EQ(non_trivial_move, 0);
ROCKSDB_NAMESPACE::port::Thread threads([&] {
compact_options.change_level = false;
compact_options.exclusive_manual_compaction = false;
std::string begin_string = Key(0);
std::string end_string = Key(199);
Slice begin(begin_string);
Slice end(end_string);
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
});
TEST_SYNC_POINT("DBCompaction::PartialFill:1");
// Many files 4 [300 => 4300)
for (int32_t i = 0; i <= 5; i++) {
for (int32_t j = 300; j < 4300; j++) {
if (j == 2300) {
ASSERT_OK(Flush());
dbfull()->TEST_WaitForFlushMemTable();
}
values[j] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(j), values[j]));
}
}
// Verify level sizes
uint64_t target_size = 4 * options.max_bytes_for_level_base;
for (int32_t i = 1; i < options.num_levels; i++) {
ASSERT_LE(SizeAtLevel(i), target_size);
target_size = static_cast<uint64_t>(target_size *
options.max_bytes_for_level_multiplier);
}
TEST_SYNC_POINT("DBCompaction::PartialFill:2");
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
threads.join();
for (int32_t i = 0; i < 4300; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
}
TEST_F(DBCompactionTest, ManualCompactionWithUnorderedWrite) {
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::WriteImpl:UnorderedWriteAfterWriteWAL",
"DBCompactionTest::ManualCompactionWithUnorderedWrite:WaitWriteWAL"},
{"DBImpl::WaitForPendingWrites:BeforeBlock",
"DBImpl::WriteImpl:BeforeUnorderedWriteMemtable"}});
Options options = CurrentOptions();
options.unordered_write = true;
DestroyAndReopen(options);
Put("foo", "v1");
ASSERT_OK(Flush());
Put("bar", "v1");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
port::Thread writer([&]() { Put("foo", "v2"); });
TEST_SYNC_POINT(
"DBCompactionTest::ManualCompactionWithUnorderedWrite:WaitWriteWAL");
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
writer.join();
ASSERT_EQ(Get("foo"), "v2");
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
Reopen(options);
ASSERT_EQ(Get("foo"), "v2");
}
TEST_F(DBCompactionTest, DeleteFileRange) {
Options options = CurrentOptions();
options.write_buffer_size = 10 * 1024 * 1024;
options.max_bytes_for_level_multiplier = 2;
options.num_levels = 4;
options.level0_file_num_compaction_trigger = 3;
options.max_background_compactions = 3;
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
// Add 2 non-overlapping files
Random rnd(301);
std::map<int32_t, std::string> values;
// file 1 [0 => 100]
for (int32_t i = 0; i < 100; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// file 2 [100 => 300]
for (int32_t i = 100; i < 300; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// 2 files in L0
ASSERT_EQ("2", FilesPerLevel(0));
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 2;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
// 2 files in L2
ASSERT_EQ("0,0,2", FilesPerLevel(0));
// file 3 [ 0 => 200]
for (int32_t i = 0; i < 200; i++) {
values[i] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
// Many files 4 [300 => 4300)
for (int32_t i = 0; i <= 5; i++) {
for (int32_t j = 300; j < 4300; j++) {
if (j == 2300) {
ASSERT_OK(Flush());
dbfull()->TEST_WaitForFlushMemTable();
}
values[j] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(j), values[j]));
}
}
ASSERT_OK(Flush());
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
// Verify level sizes
uint64_t target_size = 4 * options.max_bytes_for_level_base;
for (int32_t i = 1; i < options.num_levels; i++) {
ASSERT_LE(SizeAtLevel(i), target_size);
target_size = static_cast<uint64_t>(target_size *
options.max_bytes_for_level_multiplier);
}
size_t old_num_files = CountFiles();
std::string begin_string = Key(1000);
std::string end_string = Key(2000);
Slice begin(begin_string);
Slice end(end_string);
ASSERT_OK(DeleteFilesInRange(db_, db_->DefaultColumnFamily(), &begin, &end));
int32_t deleted_count = 0;
for (int32_t i = 0; i < 4300; i++) {
if (i < 1000 || i > 2000) {
ASSERT_EQ(Get(Key(i)), values[i]);
} else {
ReadOptions roptions;
std::string result;
Status s = db_->Get(roptions, Key(i), &result);
ASSERT_TRUE(s.IsNotFound() || s.ok());
if (s.IsNotFound()) {
deleted_count++;
}
}
}
ASSERT_GT(deleted_count, 0);
begin_string = Key(5000);
end_string = Key(6000);
Slice begin1(begin_string);
Slice end1(end_string);
// Try deleting files in range which contain no keys
ASSERT_OK(
DeleteFilesInRange(db_, db_->DefaultColumnFamily(), &begin1, &end1));
// Push data from level 0 to level 1 to force all data to be deleted
// Note that we don't delete level 0 files
compact_options.change_level = true;
compact_options.target_level = 1;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
dbfull()->TEST_WaitForCompact();
ASSERT_OK(
DeleteFilesInRange(db_, db_->DefaultColumnFamily(), nullptr, nullptr));
int32_t deleted_count2 = 0;
for (int32_t i = 0; i < 4300; i++) {
ReadOptions roptions;
std::string result;
Status s = db_->Get(roptions, Key(i), &result);
ASSERT_TRUE(s.IsNotFound());
deleted_count2++;
}
ASSERT_GT(deleted_count2, deleted_count);
size_t new_num_files = CountFiles();
ASSERT_GT(old_num_files, new_num_files);
}
TEST_F(DBCompactionTest, DeleteFilesInRanges) {
Options options = CurrentOptions();
options.write_buffer_size = 10 * 1024 * 1024;
options.max_bytes_for_level_multiplier = 2;
options.num_levels = 4;
options.max_background_compactions = 3;
options.disable_auto_compactions = true;
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
Random rnd(301);
std::map<int32_t, std::string> values;
// file [0 => 100), [100 => 200), ... [900, 1000)
for (auto i = 0; i < 10; i++) {
for (auto j = 0; j < 100; j++) {
auto k = i * 100 + j;
values[k] = RandomString(&rnd, value_size);
ASSERT_OK(Put(Key(k), values[k]));
}
ASSERT_OK(Flush());
}
ASSERT_EQ("10", FilesPerLevel(0));
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 2;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,10", FilesPerLevel(0));
// file [0 => 100), [200 => 300), ... [800, 900)
for (auto i = 0; i < 10; i+=2) {
for (auto j = 0; j < 100; j++) {
auto k = i * 100 + j;
ASSERT_OK(Put(Key(k), values[k]));
}
ASSERT_OK(Flush());
}
ASSERT_EQ("5,0,10", FilesPerLevel(0));
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr));
ASSERT_EQ("0,5,10", FilesPerLevel(0));
// Delete files in range [0, 299] (inclusive)
{
auto begin_str1 = Key(0), end_str1 = Key(100);
auto begin_str2 = Key(100), end_str2 = Key(200);
auto begin_str3 = Key(200), end_str3 = Key(299);
Slice begin1(begin_str1), end1(end_str1);
Slice begin2(begin_str2), end2(end_str2);
Slice begin3(begin_str3), end3(end_str3);
std::vector<RangePtr> ranges;
ranges.push_back(RangePtr(&begin1, &end1));
ranges.push_back(RangePtr(&begin2, &end2));
ranges.push_back(RangePtr(&begin3, &end3));
ASSERT_OK(DeleteFilesInRanges(db_, db_->DefaultColumnFamily(),
ranges.data(), ranges.size()));
ASSERT_EQ("0,3,7", FilesPerLevel(0));
// Keys [0, 300) should not exist.
for (auto i = 0; i < 300; i++) {
ReadOptions ropts;
std::string result;
auto s = db_->Get(ropts, Key(i), &result);
ASSERT_TRUE(s.IsNotFound());
}
for (auto i = 300; i < 1000; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
}
// Delete files in range [600, 999) (exclusive)
{
auto begin_str1 = Key(600), end_str1 = Key(800);
auto begin_str2 = Key(700), end_str2 = Key(900);
auto begin_str3 = Key(800), end_str3 = Key(999);
Slice begin1(begin_str1), end1(end_str1);
Slice begin2(begin_str2), end2(end_str2);
Slice begin3(begin_str3), end3(end_str3);
std::vector<RangePtr> ranges;
ranges.push_back(RangePtr(&begin1, &end1));
ranges.push_back(RangePtr(&begin2, &end2));
ranges.push_back(RangePtr(&begin3, &end3));
ASSERT_OK(DeleteFilesInRanges(db_, db_->DefaultColumnFamily(),
ranges.data(), ranges.size(), false));
ASSERT_EQ("0,1,4", FilesPerLevel(0));
// Keys [600, 900) should not exist.
for (auto i = 600; i < 900; i++) {
ReadOptions ropts;
std::string result;
auto s = db_->Get(ropts, Key(i), &result);
ASSERT_TRUE(s.IsNotFound());
}
for (auto i = 300; i < 600; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
for (auto i = 900; i < 1000; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
}
// Delete all files.
{
RangePtr range;
ASSERT_OK(DeleteFilesInRanges(db_, db_->DefaultColumnFamily(), &range, 1));
ASSERT_EQ("", FilesPerLevel(0));
for (auto i = 0; i < 1000; i++) {
ReadOptions ropts;
std::string result;
auto s = db_->Get(ropts, Key(i), &result);
ASSERT_TRUE(s.IsNotFound());
}
}
}
TEST_F(DBCompactionTest, DeleteFileRangeFileEndpointsOverlapBug) {
// regression test for #2833: groups of files whose user-keys overlap at the
// endpoints could be split by `DeleteFilesInRange`. This caused old data to
// reappear, either because a new version of the key was removed, or a range
// deletion was partially dropped. It could also cause non-overlapping
// invariant to be violated if the files dropped by DeleteFilesInRange were
// a subset of files that a range deletion spans.
const int kNumL0Files = 2;
const int kValSize = 8 << 10; // 8KB
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = kNumL0Files;
options.target_file_size_base = 1 << 10; // 1KB
DestroyAndReopen(options);
// The snapshot prevents key 1 from having its old version dropped. The low
// `target_file_size_base` ensures two keys will be in each output file.
const Snapshot* snapshot = nullptr;
Random rnd(301);
// The value indicates which flush the key belonged to, which is enough
// for us to determine the keys' relative ages. After L0 flushes finish,
// files look like:
//
// File 0: 0 -> vals[0], 1 -> vals[0]
// File 1: 1 -> vals[1], 2 -> vals[1]
//
// Then L0->L1 compaction happens, which outputs keys as follows:
//
// File 0: 0 -> vals[0], 1 -> vals[1]
// File 1: 1 -> vals[0], 2 -> vals[1]
//
// DeleteFilesInRange shouldn't be allowed to drop just file 0, as that
// would cause `1 -> vals[0]` (an older key) to reappear.
std::string vals[kNumL0Files];
for (int i = 0; i < kNumL0Files; ++i) {
vals[i] = RandomString(&rnd, kValSize);
Put(Key(i), vals[i]);
Put(Key(i + 1), vals[i]);
Flush();
if (i == 0) {
snapshot = db_->GetSnapshot();
}
}
dbfull()->TEST_WaitForCompact();
// Verify `DeleteFilesInRange` can't drop only file 0 which would cause
// "1 -> vals[0]" to reappear.
std::string begin_str = Key(0), end_str = Key(1);
Slice begin = begin_str, end = end_str;
ASSERT_OK(DeleteFilesInRange(db_, db_->DefaultColumnFamily(), &begin, &end));
ASSERT_EQ(vals[1], Get(Key(1)));
db_->ReleaseSnapshot(snapshot);
}
TEST_P(DBCompactionTestWithParam, TrivialMoveToLastLevelWithFiles) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.write_buffer_size = 100000000;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
Random rnd(301);
std::vector<std::string> values;
// File with keys [ 0 => 99 ]
for (int i = 0; i < 100; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
ASSERT_EQ("1", FilesPerLevel(0));
// Compaction will do L0=>L1 (trivial move) then move L1 files to L3
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 3;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,0,1", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
// File with keys [ 100 => 199 ]
for (int i = 100; i < 200; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(Key(i), values[i]));
}
ASSERT_OK(Flush());
ASSERT_EQ("1,0,0,1", FilesPerLevel(0));
CompactRangeOptions cro;
cro.exclusive_manual_compaction = exclusive_manual_compaction_;
// Compaction will do L0=>L1 L1=>L2 L2=>L3 (3 trivial moves)
ASSERT_OK(db_->CompactRange(cro, nullptr, nullptr));
ASSERT_EQ("0,0,0,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 4);
ASSERT_EQ(non_trivial_move, 0);
for (int i = 0; i < 200; i++) {
ASSERT_EQ(Get(Key(i)), values[i]);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, LevelCompactionThirdPath) {
Options options = CurrentOptions();
options.db_paths.emplace_back(dbname_, 500 * 1024);
options.db_paths.emplace_back(dbname_ + "_2", 4 * 1024 * 1024);
options.db_paths.emplace_back(dbname_ + "_3", 1024 * 1024 * 1024);
options.memtable_factory.reset(
new SpecialSkipListFactory(KNumKeysByGenerateNewFile - 1));
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 2;
options.num_levels = 4;
options.max_bytes_for_level_base = 400 * 1024;
options.max_subcompactions = max_subcompactions_;
// options = CurrentOptions(options);
std::vector<std::string> filenames;
env_->GetChildren(options.db_paths[1].path, &filenames);
// Delete archival files.
for (size_t i = 0; i < filenames.size(); ++i) {
env_->DeleteFile(options.db_paths[1].path + "/" + filenames[i]);
}
env_->DeleteDir(options.db_paths[1].path);
Reopen(options);
Random rnd(301);
int key_idx = 0;
// First three 110KB files are not going to second path.
// After that, (100K, 200K)
for (int num = 0; num < 3; num++) {
GenerateNewFile(&rnd, &key_idx);
}
// Another 110KB triggers a compaction to 400K file to fill up first path
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ(3, GetSstFileCount(options.db_paths[1].path));
// (1, 4)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4", FilesPerLevel(0));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 1)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,1", FilesPerLevel(0));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 2)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,2", FilesPerLevel(0));
ASSERT_EQ(2, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 3)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,3", FilesPerLevel(0));
ASSERT_EQ(3, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 4)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,4", FilesPerLevel(0));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 5)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,5", FilesPerLevel(0));
ASSERT_EQ(5, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 6)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,6", FilesPerLevel(0));
ASSERT_EQ(6, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 7)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,7", FilesPerLevel(0));
ASSERT_EQ(7, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
// (1, 4, 8)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,8", FilesPerLevel(0));
ASSERT_EQ(8, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(4, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Reopen(options);
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Destroy(options);
}
TEST_P(DBCompactionTestWithParam, LevelCompactionPathUse) {
Options options = CurrentOptions();
options.db_paths.emplace_back(dbname_, 500 * 1024);
options.db_paths.emplace_back(dbname_ + "_2", 4 * 1024 * 1024);
options.db_paths.emplace_back(dbname_ + "_3", 1024 * 1024 * 1024);
options.memtable_factory.reset(
new SpecialSkipListFactory(KNumKeysByGenerateNewFile - 1));
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 2;
options.num_levels = 4;
options.max_bytes_for_level_base = 400 * 1024;
options.max_subcompactions = max_subcompactions_;
// options = CurrentOptions(options);
std::vector<std::string> filenames;
env_->GetChildren(options.db_paths[1].path, &filenames);
// Delete archival files.
for (size_t i = 0; i < filenames.size(); ++i) {
env_->DeleteFile(options.db_paths[1].path + "/" + filenames[i]);
}
env_->DeleteDir(options.db_paths[1].path);
Reopen(options);
Random rnd(301);
int key_idx = 0;
// Always gets compacted into 1 Level1 file,
// 0/1 Level 0 file
for (int num = 0; num < 3; num++) {
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
}
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,1", FilesPerLevel(0));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("0,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("0,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("0,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("0,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,1", FilesPerLevel(0));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[2].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(dbname_));
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Reopen(options);
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Destroy(options);
}
TEST_P(DBCompactionTestWithParam, LevelCompactionCFPathUse) {
Options options = CurrentOptions();
options.db_paths.emplace_back(dbname_, 500 * 1024);
options.db_paths.emplace_back(dbname_ + "_2", 4 * 1024 * 1024);
options.db_paths.emplace_back(dbname_ + "_3", 1024 * 1024 * 1024);
options.memtable_factory.reset(
new SpecialSkipListFactory(KNumKeysByGenerateNewFile - 1));
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 2;
options.num_levels = 4;
options.max_bytes_for_level_base = 400 * 1024;
options.max_subcompactions = max_subcompactions_;
std::vector<Options> option_vector;
option_vector.emplace_back(options);
ColumnFamilyOptions cf_opt1(options), cf_opt2(options);
// Configure CF1 specific paths.
cf_opt1.cf_paths.emplace_back(dbname_ + "cf1", 500 * 1024);
cf_opt1.cf_paths.emplace_back(dbname_ + "cf1_2", 4 * 1024 * 1024);
cf_opt1.cf_paths.emplace_back(dbname_ + "cf1_3", 1024 * 1024 * 1024);
option_vector.emplace_back(DBOptions(options), cf_opt1);
CreateColumnFamilies({"one"},option_vector[1]);
// Configura CF2 specific paths.
cf_opt2.cf_paths.emplace_back(dbname_ + "cf2", 500 * 1024);
cf_opt2.cf_paths.emplace_back(dbname_ + "cf2_2", 4 * 1024 * 1024);
cf_opt2.cf_paths.emplace_back(dbname_ + "cf2_3", 1024 * 1024 * 1024);
option_vector.emplace_back(DBOptions(options), cf_opt2);
CreateColumnFamilies({"two"},option_vector[2]);
ReopenWithColumnFamilies({"default", "one", "two"}, option_vector);
Random rnd(301);
int key_idx = 0;
int key_idx1 = 0;
int key_idx2 = 0;
auto generate_file = [&]() {
GenerateNewFile(0, &rnd, &key_idx);
GenerateNewFile(1, &rnd, &key_idx1);
GenerateNewFile(2, &rnd, &key_idx2);
};
auto check_sstfilecount = [&](int path_id, int expected) {
ASSERT_EQ(expected, GetSstFileCount(options.db_paths[path_id].path));
ASSERT_EQ(expected, GetSstFileCount(cf_opt1.cf_paths[path_id].path));
ASSERT_EQ(expected, GetSstFileCount(cf_opt2.cf_paths[path_id].path));
};
auto check_filesperlevel = [&](const std::string& expected) {
ASSERT_EQ(expected, FilesPerLevel(0));
ASSERT_EQ(expected, FilesPerLevel(1));
ASSERT_EQ(expected, FilesPerLevel(2));
};
auto check_getvalues = [&]() {
for (int i = 0; i < key_idx; i++) {
auto v = Get(0, Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
for (int i = 0; i < key_idx1; i++) {
auto v = Get(1, Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
for (int i = 0; i < key_idx2; i++) {
auto v = Get(2, Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
};
// Check that default column family uses db_paths.
// And Column family "one" uses cf_paths.
// First three 110KB files are not going to second path.
// After that, (100K, 200K)
for (int num = 0; num < 3; num++) {
generate_file();
}
// Another 110KB triggers a compaction to 400K file to fill up first path
generate_file();
check_sstfilecount(1, 3);
// (1, 4)
generate_file();
check_filesperlevel("1,4");
check_sstfilecount(1, 4);
check_sstfilecount(0, 1);
// (1, 4, 1)
generate_file();
check_filesperlevel("1,4,1");
check_sstfilecount(2, 1);
check_sstfilecount(1, 4);
check_sstfilecount(0, 1);
// (1, 4, 2)
generate_file();
check_filesperlevel("1,4,2");
check_sstfilecount(2, 2);
check_sstfilecount(1, 4);
check_sstfilecount(0, 1);
check_getvalues();
ReopenWithColumnFamilies({"default", "one", "two"}, option_vector);
check_getvalues();
Destroy(options, true);
}
TEST_P(DBCompactionTestWithParam, ConvertCompactionStyle) {
Random rnd(301);
int max_key_level_insert = 200;
int max_key_universal_insert = 600;
// Stage 1: generate a db with level compaction
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.num_levels = 4;
options.level0_file_num_compaction_trigger = 3;
options.max_bytes_for_level_base = 500 << 10; // 500KB
options.max_bytes_for_level_multiplier = 1;
options.target_file_size_base = 200 << 10; // 200KB
options.target_file_size_multiplier = 1;
options.max_subcompactions = max_subcompactions_;
CreateAndReopenWithCF({"pikachu"}, options);
for (int i = 0; i <= max_key_level_insert; i++) {
// each value is 10K
ASSERT_OK(Put(1, Key(i), RandomString(&rnd, 10000)));
}
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
ASSERT_GT(TotalTableFiles(1, 4), 1);
int non_level0_num_files = 0;
for (int i = 1; i < options.num_levels; i++) {
non_level0_num_files += NumTableFilesAtLevel(i, 1);
}
ASSERT_GT(non_level0_num_files, 0);
// Stage 2: reopen with universal compaction - should fail
options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 1;
options = CurrentOptions(options);
Status s = TryReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_TRUE(s.IsInvalidArgument());
// Stage 3: compact into a single file and move the file to level 0
options = CurrentOptions();
options.disable_auto_compactions = true;
options.target_file_size_base = INT_MAX;
options.target_file_size_multiplier = 1;
options.max_bytes_for_level_base = INT_MAX;
options.max_bytes_for_level_multiplier = 1;
options.num_levels = 4;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 0;
// cannot use kForceOptimized here because the compaction here is expected
// to generate one output file
compact_options.bottommost_level_compaction =
BottommostLevelCompaction::kForce;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
dbfull()->CompactRange(compact_options, handles_[1], nullptr, nullptr);
// Only 1 file in L0
ASSERT_EQ("1", FilesPerLevel(1));
// Stage 4: re-open in universal compaction style and do some db operations
options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 4;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 3;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
options.num_levels = 1;
ReopenWithColumnFamilies({"default", "pikachu"}, options);
for (int i = max_key_level_insert / 2; i <= max_key_universal_insert; i++) {
ASSERT_OK(Put(1, Key(i), RandomString(&rnd, 10000)));
}
dbfull()->Flush(FlushOptions());
ASSERT_OK(Flush(1));
dbfull()->TEST_WaitForCompact();
for (int i = 1; i < options.num_levels; i++) {
ASSERT_EQ(NumTableFilesAtLevel(i, 1), 0);
}
// verify keys inserted in both level compaction style and universal
// compaction style
std::string keys_in_db;
Iterator* iter = dbfull()->NewIterator(ReadOptions(), handles_[1]);
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
keys_in_db.append(iter->key().ToString());
keys_in_db.push_back(',');
}
delete iter;
std::string expected_keys;
for (int i = 0; i <= max_key_universal_insert; i++) {
expected_keys.append(Key(i));
expected_keys.push_back(',');
}
ASSERT_EQ(keys_in_db, expected_keys);
}
TEST_F(DBCompactionTest, L0_CompactionBug_Issue44_a) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "b", "v"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_OK(Delete(1, "b"));
ASSERT_OK(Delete(1, "a"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_OK(Delete(1, "a"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "a", "v"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("(a->v)", Contents(1));
env_->SleepForMicroseconds(1000000); // Wait for compaction to finish
ASSERT_EQ("(a->v)", Contents(1));
} while (ChangeCompactOptions());
}
TEST_F(DBCompactionTest, L0_CompactionBug_Issue44_b) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
Put(1, "", "");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Delete(1, "e");
Put(1, "", "");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Put(1, "c", "cv");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Put(1, "", "");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Put(1, "", "");
env_->SleepForMicroseconds(1000000); // Wait for compaction to finish
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Put(1, "d", "dv");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Put(1, "", "");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
Delete(1, "d");
Delete(1, "b");
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("(->)(c->cv)", Contents(1));
env_->SleepForMicroseconds(1000000); // Wait for compaction to finish
ASSERT_EQ("(->)(c->cv)", Contents(1));
} while (ChangeCompactOptions());
}
TEST_F(DBCompactionTest, ManualAutoRace) {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::BGWorkCompaction", "DBCompactionTest::ManualAutoRace:1"},
{"DBImpl::RunManualCompaction:WaitScheduled",
"BackgroundCallCompaction:0"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Put(1, "foo", "");
Put(1, "bar", "");
Flush(1);
Put(1, "foo", "");
Put(1, "bar", "");
// Generate four files in CF 0, which should trigger an auto compaction
Put("foo", "");
Put("bar", "");
Flush();
Put("foo", "");
Put("bar", "");
Flush();
Put("foo", "");
Put("bar", "");
Flush();
Put("foo", "");
Put("bar", "");
Flush();
// The auto compaction is scheduled but waited until here
TEST_SYNC_POINT("DBCompactionTest::ManualAutoRace:1");
// The auto compaction will wait until the manual compaction is registerd
// before processing so that it will be cancelled.
dbfull()->CompactRange(CompactRangeOptions(), handles_[1], nullptr, nullptr);
ASSERT_EQ("0,1", FilesPerLevel(1));
// Eventually the cancelled compaction will be rescheduled and executed.
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,1", FilesPerLevel(0));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, ManualCompaction) {
Options options = CurrentOptions();
options.max_subcompactions = max_subcompactions_;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
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, "p", "q");
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));
uint64_t prev_block_cache_add =
options.statistics->getTickerCount(BLOCK_CACHE_ADD);
CompactRangeOptions cro;
cro.exclusive_manual_compaction = exclusive_manual_compaction_;
db_->CompactRange(cro, handles_[1], nullptr, nullptr);
// Verify manual compaction doesn't fill block cache
ASSERT_EQ(prev_block_cache_add,
options.statistics->getTickerCount(BLOCK_CACHE_ADD));
ASSERT_EQ("0,0,1", FilesPerLevel(1));
if (iter == 0) {
options = CurrentOptions();
options.num_levels = 3;
options.create_if_missing = true;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
}
}
}
TEST_P(DBCompactionTestWithParam, ManualLevelCompactionOutputPathId) {
Options options = CurrentOptions();
options.db_paths.emplace_back(dbname_ + "_2", 2 * 10485760);
options.db_paths.emplace_back(dbname_ + "_3", 100 * 10485760);
options.db_paths.emplace_back(dbname_ + "_4", 120 * 10485760);
options.max_subcompactions = max_subcompactions_;
CreateAndReopenWithCF({"pikachu"}, options);
// iter - 0 with 7 levels
// iter - 1 with 3 levels
for (int iter = 0; iter < 2; ++iter) {
for (int i = 0; i < 3; ++i) {
ASSERT_OK(Put(1, "p", "begin"));
ASSERT_OK(Put(1, "q", "end"));
ASSERT_OK(Flush(1));
}
ASSERT_EQ("3", FilesPerLevel(1));
ASSERT_EQ(3, GetSstFileCount(options.db_paths[0].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
// Compaction range falls before files
Compact(1, "", "c");
ASSERT_EQ("3", FilesPerLevel(1));
// Compaction range falls after files
Compact(1, "r", "z");
ASSERT_EQ("3", FilesPerLevel(1));
// Compaction range overlaps files
Compact(1, "p", "q", 1);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ("0,1", FilesPerLevel(1));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[0].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
// Populate a different range
for (int i = 0; i < 3; ++i) {
ASSERT_OK(Put(1, "c", "begin"));
ASSERT_OK(Put(1, "e", "end"));
ASSERT_OK(Flush(1));
}
ASSERT_EQ("3,1", FilesPerLevel(1));
// Compact just the new range
Compact(1, "b", "f", 1);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ("0,2", FilesPerLevel(1));
ASSERT_EQ(2, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[0].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
// Compact all
ASSERT_OK(Put(1, "a", "begin"));
ASSERT_OK(Put(1, "z", "end"));
ASSERT_OK(Flush(1));
ASSERT_EQ("1,2", FilesPerLevel(1));
ASSERT_EQ(2, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[0].path));
CompactRangeOptions compact_options;
compact_options.target_path_id = 1;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
db_->CompactRange(compact_options, handles_[1], nullptr, nullptr);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ("0,1", FilesPerLevel(1));
ASSERT_EQ(1, GetSstFileCount(options.db_paths[1].path));
ASSERT_EQ(0, GetSstFileCount(options.db_paths[0].path));
ASSERT_EQ(0, GetSstFileCount(dbname_));
if (iter == 0) {
DestroyAndReopen(options);
options = CurrentOptions();
options.db_paths.emplace_back(dbname_ + "_2", 2 * 10485760);
options.db_paths.emplace_back(dbname_ + "_3", 100 * 10485760);
options.db_paths.emplace_back(dbname_ + "_4", 120 * 10485760);
options.max_background_flushes = 1;
options.num_levels = 3;
options.create_if_missing = true;
CreateAndReopenWithCF({"pikachu"}, options);
}
}
}
TEST_F(DBCompactionTest, FilesDeletedAfterCompaction) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v2"));
Compact(1, "a", "z");
const size_t num_files = CountLiveFiles();
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put(1, "foo", "v2"));
Compact(1, "a", "z");
}
ASSERT_EQ(CountLiveFiles(), num_files);
} while (ChangeCompactOptions());
}
// Check level comapction with compact files
TEST_P(DBCompactionTestWithParam, DISABLED_CompactFilesOnLevelCompaction) {
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.level0_stop_writes_trigger = 2;
options.max_bytes_for_level_multiplier = 2;
options.compression = kNoCompression;
options.max_subcompactions = max_subcompactions_;
options = CurrentOptions(options);
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
for (int key = 64 * kEntriesPerBuffer; key >= 0; --key) {
ASSERT_OK(Put(1, ToString(key), RandomString(&rnd, kTestValueSize)));
}
dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
dbfull()->TEST_WaitForCompact();
ColumnFamilyMetaData cf_meta;
dbfull()->GetColumnFamilyMetaData(handles_[1], &cf_meta);
int output_level = static_cast<int>(cf_meta.levels.size()) - 1;
for (int file_picked = 5; file_picked > 0; --file_picked) {
std::set<std::string> overlapping_file_names;
std::vector<std::string> compaction_input_file_names;
for (int f = 0; f < file_picked; ++f) {
int level = 0;
auto file_meta = PickFileRandomly(cf_meta, &rnd, &level);
compaction_input_file_names.push_back(file_meta->name);
GetOverlappingFileNumbersForLevelCompaction(
cf_meta, options.comparator, level, output_level,
file_meta, &overlapping_file_names);
}
ASSERT_OK(dbfull()->CompactFiles(
CompactionOptions(), handles_[1],
compaction_input_file_names,
output_level));
// Make sure all overlapping files do not exist after compaction
dbfull()->GetColumnFamilyMetaData(handles_[1], &cf_meta);
VerifyCompactionResult(cf_meta, overlapping_file_names);
}
// make sure all key-values are still there.
for (int key = 64 * kEntriesPerBuffer; key >= 0; --key) {
ASSERT_NE(Get(1, ToString(key)), "NOT_FOUND");
}
}
TEST_P(DBCompactionTestWithParam, PartialCompactionFailure) {
Options options;
const int kKeySize = 16;
const int kKvSize = 1000;
const int kKeysPerBuffer = 100;
const int kNumL1Files = 5;
options.create_if_missing = true;
options.write_buffer_size = kKeysPerBuffer * kKvSize;
options.max_write_buffer_number = 2;
options.target_file_size_base =
options.write_buffer_size *
(options.max_write_buffer_number - 1);
options.level0_file_num_compaction_trigger = kNumL1Files;
options.max_bytes_for_level_base =
options.level0_file_num_compaction_trigger *
options.target_file_size_base;
options.max_bytes_for_level_multiplier = 2;
options.compression = kNoCompression;
options.max_subcompactions = max_subcompactions_;
env_->SetBackgroundThreads(1, Env::HIGH);
env_->SetBackgroundThreads(1, Env::LOW);
// stop the compaction thread until we simulate the file creation failure.
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
options.env = env_;
DestroyAndReopen(options);
const int kNumInsertedKeys =
options.level0_file_num_compaction_trigger *
(options.max_write_buffer_number - 1) *
kKeysPerBuffer;
Random rnd(301);
std::vector<std::string> keys;
std::vector<std::string> values;
for (int k = 0; k < kNumInsertedKeys; ++k) {
keys.emplace_back(RandomString(&rnd, kKeySize));
values.emplace_back(RandomString(&rnd, kKvSize - kKeySize));
ASSERT_OK(Put(Slice(keys[k]), Slice(values[k])));
dbfull()->TEST_WaitForFlushMemTable();
}
dbfull()->TEST_FlushMemTable(true);
// Make sure the number of L0 files can trigger compaction.
ASSERT_GE(NumTableFilesAtLevel(0),
options.level0_file_num_compaction_trigger);
auto previous_num_level0_files = NumTableFilesAtLevel(0);
// Fail the first file creation.
env_->non_writable_count_ = 1;
sleeping_task_low.WakeUp();
sleeping_task_low.WaitUntilDone();
// Expect compaction to fail here as one file will fail its
// creation.
ASSERT_TRUE(!dbfull()->TEST_WaitForCompact().ok());
// Verify L0 -> L1 compaction does fail.
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
// Verify all L0 files are still there.
ASSERT_EQ(NumTableFilesAtLevel(0), previous_num_level0_files);
// All key-values must exist after compaction fails.
for (int k = 0; k < kNumInsertedKeys; ++k) {
ASSERT_EQ(values[k], Get(keys[k]));
}
env_->non_writable_count_ = 0;
// Make sure RocksDB will not get into corrupted state.
Reopen(options);
// Verify again after reopen.
for (int k = 0; k < kNumInsertedKeys; ++k) {
ASSERT_EQ(values[k], Get(keys[k]));
}
}
TEST_P(DBCompactionTestWithParam, DeleteMovedFileAfterCompaction) {
// iter 1 -- delete_obsolete_files_period_micros == 0
for (int iter = 0; iter < 2; ++iter) {
// 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_;
if (iter == 1) {
options.delete_obsolete_files_period_micros = 0;
}
options.create_if_missing = true;
options.level0_file_num_compaction_trigger =
2; // trigger compaction when we have 2 files
OnFileDeletionListener* listener = new OnFileDeletionListener();
options.listeners.emplace_back(listener);
options.max_subcompactions = max_subcompactions_;
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 L0->L1
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,1", FilesPerLevel(0));
// block compactions
test::SleepingBackgroundTask sleeping_task;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task,
Env::Priority::LOW);
options.max_bytes_for_level_base = 1024 * 1024; // 1 MB
Reopen(options);
std::unique_ptr<Iterator> iterator(db_->NewIterator(ReadOptions()));
ASSERT_EQ("0,1", FilesPerLevel(0));
// let compactions go
sleeping_task.WakeUp();
sleeping_task.WaitUntilDone();
// this should execute L1->L2 (move)
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1", FilesPerLevel(0));
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 1U);
auto moved_file_name = metadata[0].name;
// Create two more 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 + 100), RandomString(&rnd, 10 * 1024)));
}
ASSERT_OK(Flush());
}
// this should execute both L0->L1 and L1->L2 (merge with previous file)
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,2", FilesPerLevel(0));
// iterator is holding the file
ASSERT_OK(env_->FileExists(dbname_ + moved_file_name));
listener->SetExpectedFileName(dbname_ + moved_file_name);
iterator.reset();
// this file should have been compacted away
ASSERT_NOK(env_->FileExists(dbname_ + moved_file_name));
listener->VerifyMatchedCount(1);
}
}
TEST_P(DBCompactionTestWithParam, CompressLevelCompaction) {
if (!Zlib_Supported()) {
return;
}
Options options = CurrentOptions();
options.memtable_factory.reset(
new SpecialSkipListFactory(KNumKeysByGenerateNewFile - 1));
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10; // 110KB
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 2;
options.num_levels = 4;
options.max_bytes_for_level_base = 400 * 1024;
options.max_subcompactions = max_subcompactions_;
// First two levels have no compression, so that a trivial move between
// them will be allowed. Level 2 has Zlib compression so that a trivial
// move to level 3 will not be allowed
options.compression_per_level = {kNoCompression, kNoCompression,
kZlibCompression};
int matches = 0, didnt_match = 0, trivial_move = 0, non_trivial = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:Matches",
[&](void* /*arg*/) { matches++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:DidntMatch",
[&](void* /*arg*/) { didnt_match++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
Random rnd(301);
int key_idx = 0;
// First three 110KB files are going to level 0
// After that, (100K, 200K)
for (int num = 0; num < 3; num++) {
GenerateNewFile(&rnd, &key_idx);
}
// Another 110KB triggers a compaction to 400K file to fill up level 0
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ(4, GetSstFileCount(dbname_));
// (1, 4)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4", FilesPerLevel(0));
// (1, 4, 1)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,1", FilesPerLevel(0));
// (1, 4, 2)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,2", FilesPerLevel(0));
// (1, 4, 3)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,3", FilesPerLevel(0));
// (1, 4, 4)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,4", FilesPerLevel(0));
// (1, 4, 5)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,5", FilesPerLevel(0));
// (1, 4, 6)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,6", FilesPerLevel(0));
// (1, 4, 7)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,7", FilesPerLevel(0));
// (1, 4, 8)
GenerateNewFile(&rnd, &key_idx);
ASSERT_EQ("1,4,8", FilesPerLevel(0));
ASSERT_EQ(matches, 12);
// Currently, the test relies on the number of calls to
// InputCompressionMatchesOutput() per compaction.
const int kCallsToInputCompressionMatch = 2;
ASSERT_EQ(didnt_match, 8 * kCallsToInputCompressionMatch);
ASSERT_EQ(trivial_move, 12);
ASSERT_EQ(non_trivial, 8);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Reopen(options);
for (int i = 0; i < key_idx; i++) {
auto v = Get(Key(i));
ASSERT_NE(v, "NOT_FOUND");
ASSERT_TRUE(v.size() == 1 || v.size() == 990);
}
Destroy(options);
}
TEST_F(DBCompactionTest, SanitizeCompactionOptionsTest) {
Options options = CurrentOptions();
options.max_background_compactions = 5;
options.soft_pending_compaction_bytes_limit = 0;
options.hard_pending_compaction_bytes_limit = 100;
options.create_if_missing = true;
DestroyAndReopen(options);
ASSERT_EQ(100, db_->GetOptions().soft_pending_compaction_bytes_limit);
options.max_background_compactions = 3;
options.soft_pending_compaction_bytes_limit = 200;
options.hard_pending_compaction_bytes_limit = 150;
DestroyAndReopen(options);
ASSERT_EQ(150, db_->GetOptions().soft_pending_compaction_bytes_limit);
}
// This tests for a bug that could cause two level0 compactions running
// concurrently
// TODO(aekmekji): Make sure that the reason this fails when run with
// max_subcompactions > 1 is not a correctness issue but just inherent to
// running parallel L0-L1 compactions
TEST_F(DBCompactionTest, SuggestCompactRangeNoTwoLevel0Compactions) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleLevel;
options.write_buffer_size = 110 << 10;
options.arena_block_size = 4 << 10;
options.level0_file_num_compaction_trigger = 4;
options.num_levels = 4;
options.compression = kNoCompression;
options.max_bytes_for_level_base = 450 << 10;
options.target_file_size_base = 98 << 10;
options.max_write_buffer_number = 2;
options.max_background_compactions = 2;
DestroyAndReopen(options);
// fill up the DB
Random rnd(301);
for (int num = 0; num < 10; num++) {
GenerateNewRandomFile(&rnd);
}
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"CompactionJob::Run():Start",
"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:1"},
{"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:2",
"CompactionJob::Run():End"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// trigger L0 compaction
for (int num = 0; num < options.level0_file_num_compaction_trigger + 1;
num++) {
GenerateNewRandomFile(&rnd, /* nowait */ true);
ASSERT_OK(Flush());
}
TEST_SYNC_POINT(
"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:1");
GenerateNewRandomFile(&rnd, /* nowait */ true);
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_OK(experimental::SuggestCompactRange(db_, nullptr, nullptr));
for (int num = 0; num < options.level0_file_num_compaction_trigger + 1;
num++) {
GenerateNewRandomFile(&rnd, /* nowait */ true);
ASSERT_OK(Flush());
}
TEST_SYNC_POINT(
"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:2");
dbfull()->TEST_WaitForCompact();
}
static std::string ShortKey(int i) {
assert(i < 10000);
char buf[100];
snprintf(buf, sizeof(buf), "key%04d", i);
return std::string(buf);
}
TEST_P(DBCompactionTestWithParam, ForceBottommostLevelCompaction) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* /*arg*/) { non_trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// The key size is guaranteed to be <= 8
class ShortKeyComparator : public Comparator {
int Compare(const ROCKSDB_NAMESPACE::Slice& a,
const ROCKSDB_NAMESPACE::Slice& b) const override {
assert(a.size() <= 8);
assert(b.size() <= 8);
return BytewiseComparator()->Compare(a, b);
}
const char* Name() const override { return "ShortKeyComparator"; }
void FindShortestSeparator(
std::string* start,
const ROCKSDB_NAMESPACE::Slice& limit) const override {
return BytewiseComparator()->FindShortestSeparator(start, limit);
}
void FindShortSuccessor(std::string* key) const override {
return BytewiseComparator()->FindShortSuccessor(key);
}
} short_key_cmp;
Options options = CurrentOptions();
options.target_file_size_base = 100000000;
options.write_buffer_size = 100000000;
options.max_subcompactions = max_subcompactions_;
options.comparator = &short_key_cmp;
DestroyAndReopen(options);
int32_t value_size = 10 * 1024; // 10 KB
Random rnd(301);
std::vector<std::string> values;
// File with keys [ 0 => 99 ]
for (int i = 0; i < 100; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(ShortKey(i), values[i]));
}
ASSERT_OK(Flush());
ASSERT_EQ("1", FilesPerLevel(0));
// Compaction will do L0=>L1 (trivial move) then move L1 files to L3
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 3;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,0,1", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 1);
ASSERT_EQ(non_trivial_move, 0);
// File with keys [ 100 => 199 ]
for (int i = 100; i < 200; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(ShortKey(i), values[i]));
}
ASSERT_OK(Flush());
ASSERT_EQ("1,0,0,1", FilesPerLevel(0));
// Compaction will do L0=>L1 L1=>L2 L2=>L3 (3 trivial moves)
// then compacte the bottommost level L3=>L3 (non trivial move)
compact_options = CompactRangeOptions();
compact_options.bottommost_level_compaction =
BottommostLevelCompaction::kForceOptimized;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,0,1", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 4);
ASSERT_EQ(non_trivial_move, 1);
// File with keys [ 200 => 299 ]
for (int i = 200; i < 300; i++) {
values.push_back(RandomString(&rnd, value_size));
ASSERT_OK(Put(ShortKey(i), values[i]));
}
ASSERT_OK(Flush());
ASSERT_EQ("1,0,0,1", FilesPerLevel(0));
trivial_move = 0;
non_trivial_move = 0;
compact_options = CompactRangeOptions();
compact_options.bottommost_level_compaction =
BottommostLevelCompaction::kSkip;
// Compaction will do L0=>L1 L1=>L2 L2=>L3 (3 trivial moves)
// and will skip bottommost level compaction
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,0,2", FilesPerLevel(0));
ASSERT_EQ(trivial_move, 3);
ASSERT_EQ(non_trivial_move, 0);
for (int i = 0; i < 300; i++) {
ASSERT_EQ(Get(ShortKey(i)), values[i]);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, IntraL0Compaction) {
Options options = CurrentOptions();
options.compression = kNoCompression;
options.level0_file_num_compaction_trigger = 5;
options.max_background_compactions = 2;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
const size_t kValueSize = 1 << 20;
Random rnd(301);
std::string value(RandomString(&rnd, kValueSize));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompactionBySize:0",
"CompactionJob::Run():Start"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// index: 0 1 2 3 4 5 6 7 8 9
// size: 1MB 1MB 1MB 1MB 1MB 2MB 1MB 1MB 1MB 1MB
// score: 1.5 1.3 1.5 2.0 inf
//
// Files 0-4 will be included in an L0->L1 compaction.
//
// L0->L0 will be triggered since the sync points guarantee compaction to base
// level is still blocked when files 5-9 trigger another compaction.
//
// Files 6-9 are the longest span of available files for which
// work-per-deleted-file decreases (see "score" row above).
for (int i = 0; i < 10; ++i) {
ASSERT_OK(Put(Key(0), "")); // prevents trivial move
if (i == 5) {
ASSERT_OK(Put(Key(i + 1), value + value));
} else {
ASSERT_OK(Put(Key(i + 1), value));
}
ASSERT_OK(Flush());
}
dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
std::vector<std::vector<FileMetaData>> level_to_files;
dbfull()->TEST_GetFilesMetaData(dbfull()->DefaultColumnFamily(),
&level_to_files);
ASSERT_GE(level_to_files.size(), 2); // at least L0 and L1
// L0 has the 2MB file (not compacted) and 4MB file (output of L0->L0)
ASSERT_EQ(2, level_to_files[0].size());
ASSERT_GT(level_to_files[1].size(), 0);
for (int i = 0; i < 2; ++i) {
ASSERT_GE(level_to_files[0][i].fd.file_size, 1 << 21);
}
}
TEST_P(DBCompactionTestWithParam, IntraL0CompactionDoesNotObsoleteDeletions) {
// regression test for issue #2722: L0->L0 compaction can resurrect deleted
// keys from older L0 files if L1+ files' key-ranges do not include the key.
Options options = CurrentOptions();
options.compression = kNoCompression;
options.level0_file_num_compaction_trigger = 5;
options.max_background_compactions = 2;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
const size_t kValueSize = 1 << 20;
Random rnd(301);
std::string value(RandomString(&rnd, kValueSize));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompactionBySize:0",
"CompactionJob::Run():Start"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// index: 0 1 2 3 4 5 6 7 8 9
// size: 1MB 1MB 1MB 1MB 1MB 1MB 1MB 1MB 1MB 1MB
// score: 1.25 1.33 1.5 2.0 inf
//
// Files 0-4 will be included in an L0->L1 compaction.
//
// L0->L0 will be triggered since the sync points guarantee compaction to base
// level is still blocked when files 5-9 trigger another compaction. All files
// 5-9 are included in the L0->L0 due to work-per-deleted file decreasing.
//
// Put a key-value in files 0-4. Delete that key in files 5-9. Verify the
// L0->L0 preserves the deletion such that the key remains deleted.
for (int i = 0; i < 10; ++i) {
// key 0 serves both to prevent trivial move and as the key we want to
// verify is not resurrected by L0->L0 compaction.
if (i < 5) {
ASSERT_OK(Put(Key(0), ""));
} else {
ASSERT_OK(Delete(Key(0)));
}
ASSERT_OK(Put(Key(i + 1), value));
ASSERT_OK(Flush());
}
dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
std::vector<std::vector<FileMetaData>> level_to_files;
dbfull()->TEST_GetFilesMetaData(dbfull()->DefaultColumnFamily(),
&level_to_files);
ASSERT_GE(level_to_files.size(), 2); // at least L0 and L1
// L0 has a single output file from L0->L0
ASSERT_EQ(1, level_to_files[0].size());
ASSERT_GT(level_to_files[1].size(), 0);
ASSERT_GE(level_to_files[0][0].fd.file_size, 1 << 22);
ReadOptions roptions;
std::string result;
ASSERT_TRUE(db_->Get(roptions, Key(0), &result).IsNotFound());
}
TEST_P(DBCompactionTestWithParam, FullCompactionInBottomPriThreadPool) {
const int kNumFilesTrigger = 3;
Env::Default()->SetBackgroundThreads(1, Env::Priority::BOTTOM);
for (bool use_universal_compaction : {false, true}) {
Options options = CurrentOptions();
if (use_universal_compaction) {
options.compaction_style = kCompactionStyleUniversal;
} else {
options.compaction_style = kCompactionStyleLevel;
options.level_compaction_dynamic_level_bytes = true;
}
options.num_levels = 4;
options.write_buffer_size = 100 << 10; // 100KB
options.target_file_size_base = 32 << 10; // 32KB
options.level0_file_num_compaction_trigger = kNumFilesTrigger;
// Trigger compaction if size amplification exceeds 110%
options.compaction_options_universal.max_size_amplification_percent = 110;
DestroyAndReopen(options);
int num_bottom_pri_compactions = 0;
SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BGWorkBottomCompaction",
[&](void* /*arg*/) { ++num_bottom_pri_compactions; });
SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int num = 0; num < kNumFilesTrigger; num++) {
ASSERT_EQ(NumSortedRuns(), num);
int key_idx = 0;
GenerateNewFile(&rnd, &key_idx);
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(1, num_bottom_pri_compactions);
// Verify that size amplification did occur
ASSERT_EQ(NumSortedRuns(), 1);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
Env::Default()->SetBackgroundThreads(0, Env::Priority::BOTTOM);
}
TEST_F(DBCompactionTest, OptimizedDeletionObsoleting) {
// Deletions can be dropped when compacted to non-last level if they fall
// outside the lower-level files' key-ranges.
const int kNumL0Files = 4;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = kNumL0Files;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
DestroyAndReopen(options);
// put key 1 and 3 in separate L1, L2 files.
// So key 0, 2, and 4+ fall outside these levels' key-ranges.
for (int level = 2; level >= 1; --level) {
for (int i = 0; i < 2; ++i) {
Put(Key(2 * i + 1), "val");
Flush();
}
MoveFilesToLevel(level);
ASSERT_EQ(2, NumTableFilesAtLevel(level));
}
// Delete keys in range [1, 4]. These L0 files will be compacted with L1:
// - Tombstones for keys 2 and 4 can be dropped early.
// - Tombstones for keys 1 and 3 must be kept due to L2 files' key-ranges.
for (int i = 0; i < kNumL0Files; ++i) {
Put(Key(0), "val"); // sentinel to prevent trivial move
Delete(Key(i + 1));
Flush();
}
dbfull()->TEST_WaitForCompact();
for (int i = 0; i < kNumL0Files; ++i) {
std::string value;
ASSERT_TRUE(db_->Get(ReadOptions(), Key(i + 1), &value).IsNotFound());
}
ASSERT_EQ(2, options.statistics->getTickerCount(
COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE));
ASSERT_EQ(2,
options.statistics->getTickerCount(COMPACTION_KEY_DROP_OBSOLETE));
}
TEST_F(DBCompactionTest, CompactFilesPendingL0Bug) {
// https://www.facebook.com/groups/rocksdb.dev/permalink/1389452781153232/
// CompactFiles() had a bug where it failed to pick a compaction when an L0
// compaction existed, but marked it as scheduled anyways. It'd never be
// unmarked as scheduled, so future compactions or DB close could hang.
const int kNumL0Files = 5;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = kNumL0Files - 1;
options.max_background_compactions = 2;
DestroyAndReopen(options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompaction:Return",
"DBCompactionTest::CompactFilesPendingL0Bug:Picked"},
{"DBCompactionTest::CompactFilesPendingL0Bug:ManualCompacted",
"DBImpl::BackgroundCompaction:NonTrivial:AfterRun"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
auto schedule_multi_compaction_token =
dbfull()->TEST_write_controler().GetCompactionPressureToken();
// Files 0-3 will be included in an L0->L1 compaction.
//
// File 4 will be included in a call to CompactFiles() while the first
// compaction is running.
for (int i = 0; i < kNumL0Files - 1; ++i) {
ASSERT_OK(Put(Key(0), "val")); // sentinel to prevent trivial move
ASSERT_OK(Put(Key(i + 1), "val"));
ASSERT_OK(Flush());
}
TEST_SYNC_POINT("DBCompactionTest::CompactFilesPendingL0Bug:Picked");
// file 4 flushed after 0-3 picked
ASSERT_OK(Put(Key(kNumL0Files), "val"));
ASSERT_OK(Flush());
// previously DB close would hang forever as this situation caused scheduled
// compactions count to never decrement to zero.
ColumnFamilyMetaData cf_meta;
dbfull()->GetColumnFamilyMetaData(dbfull()->DefaultColumnFamily(), &cf_meta);
ASSERT_EQ(kNumL0Files, cf_meta.levels[0].files.size());
std::vector<std::string> input_filenames;
input_filenames.push_back(cf_meta.levels[0].files.front().name);
ASSERT_OK(dbfull()
->CompactFiles(CompactionOptions(), input_filenames,
0 /* output_level */));
TEST_SYNC_POINT("DBCompactionTest::CompactFilesPendingL0Bug:ManualCompacted");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, CompactFilesOverlapInL0Bug) {
// Regression test for bug of not pulling in L0 files that overlap the user-
// specified input files in time- and key-ranges.
Put(Key(0), "old_val");
Flush();
Put(Key(0), "new_val");
Flush();
ColumnFamilyMetaData cf_meta;
dbfull()->GetColumnFamilyMetaData(dbfull()->DefaultColumnFamily(), &cf_meta);
ASSERT_GE(cf_meta.levels.size(), 2);
ASSERT_EQ(2, cf_meta.levels[0].files.size());
// Compacting {new L0 file, L1 file} should pull in the old L0 file since it
// overlaps in key-range and time-range.
std::vector<std::string> input_filenames;
input_filenames.push_back(cf_meta.levels[0].files.front().name);
ASSERT_OK(dbfull()->CompactFiles(CompactionOptions(), input_filenames,
1 /* output_level */));
ASSERT_EQ("new_val", Get(Key(0)));
}
TEST_F(DBCompactionTest, CompactBottomLevelFilesWithDeletions) {
// bottom-level files may contain deletions due to snapshots protecting the
// deleted keys. Once the snapshot is released, we should see files with many
// such deletions undergo single-file compactions.
const int kNumKeysPerFile = 1024;
const int kNumLevelFiles = 4;
const int kValueSize = 128;
Options options = CurrentOptions();
options.compression = kNoCompression;
options.level0_file_num_compaction_trigger = kNumLevelFiles;
// inflate it a bit to account for key/metadata overhead
options.target_file_size_base = 120 * kNumKeysPerFile * kValueSize / 100;
CreateAndReopenWithCF({"one"}, options);
Random rnd(301);
const Snapshot* snapshot = nullptr;
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
if (i == kNumLevelFiles - 1) {
snapshot = db_->GetSnapshot();
// delete every other key after grabbing a snapshot, so these deletions
// and the keys they cover can't be dropped until after the snapshot is
// released.
for (int j = 0; j < kNumLevelFiles * kNumKeysPerFile; j += 2) {
ASSERT_OK(Delete(Key(j)));
}
}
Flush();
if (i < kNumLevelFiles - 1) {
ASSERT_EQ(i + 1, NumTableFilesAtLevel(0));
}
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(kNumLevelFiles, NumTableFilesAtLevel(1));
std::vector<LiveFileMetaData> pre_release_metadata, post_release_metadata;
db_->GetLiveFilesMetaData(&pre_release_metadata);
// just need to bump seqnum so ReleaseSnapshot knows the newest key in the SST
// files does not need to be preserved in case of a future snapshot.
ASSERT_OK(Put(Key(0), "val"));
ASSERT_NE(kMaxSequenceNumber, dbfull()->bottommost_files_mark_threshold_);
// release snapshot and wait for compactions to finish. Single-file
// compactions should be triggered, which reduce the size of each bottom-level
// file without changing file count.
db_->ReleaseSnapshot(snapshot);
ASSERT_EQ(kMaxSequenceNumber, dbfull()->bottommost_files_mark_threshold_);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
ASSERT_TRUE(compaction->compaction_reason() ==
CompactionReason::kBottommostFiles);
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
dbfull()->TEST_WaitForCompact();
db_->GetLiveFilesMetaData(&post_release_metadata);
ASSERT_EQ(pre_release_metadata.size(), post_release_metadata.size());
for (size_t i = 0; i < pre_release_metadata.size(); ++i) {
const auto& pre_file = pre_release_metadata[i];
const auto& post_file = post_release_metadata[i];
ASSERT_EQ(1, pre_file.level);
ASSERT_EQ(1, post_file.level);
// each file is smaller than it was before as it was rewritten without
// deletion markers/deleted keys.
ASSERT_LT(post_file.size, pre_file.size);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, LevelCompactExpiredTtlFiles) {
const int kNumKeysPerFile = 32;
const int kNumLevelFiles = 2;
const int kValueSize = 1024;
Options options = CurrentOptions();
options.compression = kNoCompression;
options.ttl = 24 * 60 * 60; // 24 hours
options.max_open_files = -1;
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
DestroyAndReopen(options);
Random rnd(301);
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
MoveFilesToLevel(3);
ASSERT_EQ("0,0,0,2", FilesPerLevel());
// Delete previously written keys.
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(Delete(Key(i * kNumKeysPerFile + j)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("2,0,0,2", FilesPerLevel());
MoveFilesToLevel(1);
ASSERT_EQ("0,2,0,2", FilesPerLevel());
env_->addon_time_.fetch_add(36 * 60 * 60); // 36 hours
ASSERT_EQ("0,2,0,2", FilesPerLevel());
// Just do a simple write + flush so that the Ttl expired files get
// compacted.
ASSERT_OK(Put("a", "1"));
Flush();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
ASSERT_TRUE(compaction->compaction_reason() == CompactionReason::kTtl);
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
dbfull()->TEST_WaitForCompact();
// All non-L0 files are deleted, as they contained only deleted data.
ASSERT_EQ("1", FilesPerLevel());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
// Test dynamically changing ttl.
env_->addon_time_.store(0);
DestroyAndReopen(options);
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
MoveFilesToLevel(3);
ASSERT_EQ("0,0,0,2", FilesPerLevel());
// Delete previously written keys.
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(Delete(Key(i * kNumKeysPerFile + j)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("2,0,0,2", FilesPerLevel());
MoveFilesToLevel(1);
ASSERT_EQ("0,2,0,2", FilesPerLevel());
// Move time forward by 12 hours, and make sure that compaction still doesn't
// trigger as ttl is set to 24 hours.
env_->addon_time_.fetch_add(12 * 60 * 60);
ASSERT_OK(Put("a", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("1,2,0,2", FilesPerLevel());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
ASSERT_TRUE(compaction->compaction_reason() == CompactionReason::kTtl);
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Dynamically change ttl to 10 hours.
// This should trigger a ttl compaction, as 12 hours have already passed.
ASSERT_OK(dbfull()->SetOptions({{"ttl", "36000"}}));
dbfull()->TEST_WaitForCompact();
// All non-L0 files are deleted, as they contained only deleted data.
ASSERT_EQ("1", FilesPerLevel());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, LevelTtlCascadingCompactions) {
const int kValueSize = 100;
for (bool if_restart : {false, true}) {
for (bool if_open_all_files : {false, true}) {
Options options = CurrentOptions();
options.compression = kNoCompression;
options.ttl = 24 * 60 * 60; // 24 hours
if (if_open_all_files) {
options.max_open_files = -1;
} else {
options.max_open_files = 20;
}
// RocksDB sanitize max open files to at least 20. Modify it back.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SanitizeOptions::AfterChangeMaxOpenFiles", [&](void* arg) {
int* max_open_files = static_cast<int*>(arg);
*max_open_files = 2;
});
// In the case where all files are opened and doing DB restart
// forcing the oldest ancester time in manifest file to be 0 to
// simulate the case of reading from an old version.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"VersionEdit::EncodeTo:VarintOldestAncesterTime", [&](void* arg) {
if (if_restart && if_open_all_files) {
std::string* encoded_fieled = static_cast<std::string*>(arg);
*encoded_fieled = "";
PutVarint64(encoded_fieled, 0);
}
});
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
DestroyAndReopen(options);
int ttl_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
auto compaction_reason = compaction->compaction_reason();
if (compaction_reason == CompactionReason::kTtl) {
ttl_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Add two L6 files with key ranges: [1 .. 100], [101 .. 200].
Random rnd(301);
for (int i = 1; i <= 100; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, kValueSize)));
}
Flush();
// Get the first file's creation time. This will be the oldest file in the
// DB. Compactions inolving this file's descendents should keep getting
// this time.
std::vector<std::vector<FileMetaData>> level_to_files;
dbfull()->TEST_GetFilesMetaData(dbfull()->DefaultColumnFamily(),
&level_to_files);
uint64_t oldest_time = level_to_files[0][0].oldest_ancester_time;
// Add 1 hour and do another flush.
env_->addon_time_.fetch_add(1 * 60 * 60);
for (int i = 101; i <= 200; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, kValueSize)));
}
Flush();
MoveFilesToLevel(6);
ASSERT_EQ("0,0,0,0,0,0,2", FilesPerLevel());
env_->addon_time_.fetch_add(1 * 60 * 60);
// Add two L4 files with key ranges: [1 .. 50], [51 .. 150].
for (int i = 1; i <= 50; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, kValueSize)));
}
Flush();
env_->addon_time_.fetch_add(1 * 60 * 60);
for (int i = 51; i <= 150; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, kValueSize)));
}
Flush();
MoveFilesToLevel(4);
ASSERT_EQ("0,0,0,0,2,0,2", FilesPerLevel());
env_->addon_time_.fetch_add(1 * 60 * 60);
// Add one L1 file with key range: [26, 75].
for (int i = 26; i <= 75; ++i) {
ASSERT_OK(Put(Key(i), RandomString(&rnd, kValueSize)));
}
Flush();
dbfull()->TEST_WaitForCompact();
MoveFilesToLevel(1);
ASSERT_EQ("0,1,0,0,2,0,2", FilesPerLevel());
// LSM tree:
// L1: [26 .. 75]
// L4: [1 .. 50][51 ..... 150]
// L6: [1 ........ 100][101 .... 200]
//
// On TTL expiry, TTL compaction should be initiated on L1 file, and the
// compactions should keep going on until the key range hits bottom level.
// In other words: the compaction on this data range "cascasdes" until
// reaching the bottom level.
//
// Order of events on TTL expiry:
// 1. L1 file falls to L3 via 2 trivial moves which are initiated by the
// ttl
// compaction.
// 2. A TTL compaction happens between L3 and L4 files. Output file in L4.
// 3. The new output file from L4 falls to L5 via 1 trival move initiated
// by the ttl compaction.
// 4. A TTL compaction happens between L5 and L6 files. Ouptut in L6.
// Add 25 hours and do a write
env_->addon_time_.fetch_add(25 * 60 * 60);
ASSERT_OK(Put(Key(1), "1"));
if (if_restart) {
Reopen(options);
} else {
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("1,0,0,0,0,0,1", FilesPerLevel());
ASSERT_EQ(5, ttl_compactions);
dbfull()->TEST_GetFilesMetaData(dbfull()->DefaultColumnFamily(),
&level_to_files);
ASSERT_EQ(oldest_time, level_to_files[6][0].oldest_ancester_time);
env_->addon_time_.fetch_add(25 * 60 * 60);
ASSERT_OK(Put(Key(2), "1"));
if (if_restart) {
Reopen(options);
} else {
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("1,0,0,0,0,0,1", FilesPerLevel());
ASSERT_GE(ttl_compactions, 6);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
}
TEST_F(DBCompactionTest, LevelPeriodicCompaction) {
const int kNumKeysPerFile = 32;
const int kNumLevelFiles = 2;
const int kValueSize = 100;
for (bool if_restart : {false, true}) {
for (bool if_open_all_files : {false, true}) {
Options options = CurrentOptions();
options.periodic_compaction_seconds = 48 * 60 * 60; // 2 days
if (if_open_all_files) {
options.max_open_files = -1; // needed for ttl compaction
} else {
options.max_open_files = 20;
}
// RocksDB sanitize max open files to at least 20. Modify it back.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SanitizeOptions::AfterChangeMaxOpenFiles", [&](void* arg) {
int* max_open_files = static_cast<int*>(arg);
*max_open_files = 0;
});
// In the case where all files are opened and doing DB restart
// forcing the file creation time in manifest file to be 0 to
// simulate the case of reading from an old version.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"VersionEdit::EncodeTo:VarintFileCreationTime", [&](void* arg) {
if (if_restart && if_open_all_files) {
std::string* encoded_fieled = static_cast<std::string*>(arg);
*encoded_fieled = "";
PutVarint64(encoded_fieled, 0);
}
});
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
DestroyAndReopen(options);
int periodic_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
auto compaction_reason = compaction->compaction_reason();
if (compaction_reason == CompactionReason::kPeriodicCompaction) {
periodic_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(Put(Key(i * kNumKeysPerFile + j),
RandomString(&rnd, kValueSize)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("2", FilesPerLevel());
ASSERT_EQ(0, periodic_compactions);
// Add 50 hours and do a write
env_->addon_time_.fetch_add(50 * 60 * 60);
ASSERT_OK(Put("a", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
// Assert that the files stay in the same level
ASSERT_EQ("3", FilesPerLevel());
// The two old files go through the periodic compaction process
ASSERT_EQ(2, periodic_compactions);
MoveFilesToLevel(1);
ASSERT_EQ("0,3", FilesPerLevel());
// Add another 50 hours and do another write
env_->addon_time_.fetch_add(50 * 60 * 60);
ASSERT_OK(Put("b", "2"));
if (if_restart) {
Reopen(options);
} else {
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("1,3", FilesPerLevel());
// The three old files now go through the periodic compaction process. 2
// + 3.
ASSERT_EQ(5, periodic_compactions);
// Add another 50 hours and do another write
env_->addon_time_.fetch_add(50 * 60 * 60);
ASSERT_OK(Put("c", "3"));
Flush();
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("2,3", FilesPerLevel());
// The four old files now go through the periodic compaction process. 5
// + 4.
ASSERT_EQ(9, periodic_compactions);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
}
TEST_F(DBCompactionTest, LevelPeriodicCompactionWithOldDB) {
// This test makes sure that periodic compactions are working with a DB
// where file_creation_time of some files is 0.
// After compactions the new files are created with a valid file_creation_time
const int kNumKeysPerFile = 32;
const int kNumFiles = 4;
const int kValueSize = 100;
Options options = CurrentOptions();
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
DestroyAndReopen(options);
int periodic_compactions = 0;
bool set_file_creation_time_to_zero = true;
bool set_creation_time_to_zero = true;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
auto compaction_reason = compaction->compaction_reason();
if (compaction_reason == CompactionReason::kPeriodicCompaction) {
periodic_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"PropertyBlockBuilder::AddTableProperty:Start", [&](void* arg) {
TableProperties* props = reinterpret_cast<TableProperties*>(arg);
if (set_file_creation_time_to_zero) {
props->file_creation_time = 0;
}
if (set_creation_time_to_zero) {
props->creation_time = 0;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int i = 0; i < kNumFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
Flush();
// Move the first two files to L2.
if (i == 1) {
MoveFilesToLevel(2);
set_creation_time_to_zero = false;
}
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ("2,0,2", FilesPerLevel());
ASSERT_EQ(0, periodic_compactions);
Close();
set_file_creation_time_to_zero = false;
// Forward the clock by 2 days.
env_->addon_time_.fetch_add(2 * 24 * 60 * 60);
options.periodic_compaction_seconds = 1 * 24 * 60 * 60; // 1 day
Reopen(options);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ("2,0,2", FilesPerLevel());
// Make sure that all files go through periodic compaction.
ASSERT_EQ(kNumFiles, periodic_compactions);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, LevelPeriodicAndTtlCompaction) {
const int kNumKeysPerFile = 32;
const int kNumLevelFiles = 2;
const int kValueSize = 100;
Options options = CurrentOptions();
options.ttl = 10 * 60 * 60; // 10 hours
options.periodic_compaction_seconds = 48 * 60 * 60; // 2 days
options.max_open_files = -1; // needed for both periodic and ttl compactions
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
DestroyAndReopen(options);
int periodic_compactions = 0;
int ttl_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
auto compaction_reason = compaction->compaction_reason();
if (compaction_reason == CompactionReason::kPeriodicCompaction) {
periodic_compactions++;
} else if (compaction_reason == CompactionReason::kTtl) {
ttl_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
MoveFilesToLevel(3);
ASSERT_EQ("0,0,0,2", FilesPerLevel());
ASSERT_EQ(0, periodic_compactions);
ASSERT_EQ(0, ttl_compactions);
// Add some time greater than periodic_compaction_time.
env_->addon_time_.fetch_add(50 * 60 * 60);
ASSERT_OK(Put("a", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
// Files in the bottom level go through periodic compactions.
ASSERT_EQ("1,0,0,2", FilesPerLevel());
ASSERT_EQ(2, periodic_compactions);
ASSERT_EQ(0, ttl_compactions);
// Add a little more time than ttl
env_->addon_time_.fetch_add(11 * 60 * 60);
ASSERT_OK(Put("b", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
// Notice that the previous file in level 1 falls down to the bottom level
// due to ttl compactions, one level at a time.
// And bottom level files don't get picked up for ttl compactions.
ASSERT_EQ("1,0,0,3", FilesPerLevel());
ASSERT_EQ(2, periodic_compactions);
ASSERT_EQ(3, ttl_compactions);
// Add some time greater than periodic_compaction_time.
env_->addon_time_.fetch_add(50 * 60 * 60);
ASSERT_OK(Put("c", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
// Previous L0 file falls one level at a time to bottom level due to ttl.
// And all 4 bottom files go through periodic compactions.
ASSERT_EQ("1,0,0,4", FilesPerLevel());
ASSERT_EQ(6, periodic_compactions);
ASSERT_EQ(6, ttl_compactions);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, LevelPeriodicCompactionWithCompactionFilters) {
class TestCompactionFilter : public CompactionFilter {
const char* Name() const override { return "TestCompactionFilter"; }
};
class TestCompactionFilterFactory : public CompactionFilterFactory {
const char* Name() const override { return "TestCompactionFilterFactory"; }
std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context& /*context*/) override {
return std::unique_ptr<CompactionFilter>(new TestCompactionFilter());
}
};
const int kNumKeysPerFile = 32;
const int kNumLevelFiles = 2;
const int kValueSize = 100;
Random rnd(301);
Options options = CurrentOptions();
TestCompactionFilter test_compaction_filter;
env_->time_elapse_only_sleep_ = false;
options.env = env_;
env_->addon_time_.store(0);
enum CompactionFilterType {
kUseCompactionFilter,
kUseCompactionFilterFactory
};
for (CompactionFilterType comp_filter_type :
{kUseCompactionFilter, kUseCompactionFilterFactory}) {
// Assert that periodic compactions are not enabled.
ASSERT_EQ(port::kMaxUint64 - 1, options.periodic_compaction_seconds);
if (comp_filter_type == kUseCompactionFilter) {
options.compaction_filter = &test_compaction_filter;
options.compaction_filter_factory.reset();
} else if (comp_filter_type == kUseCompactionFilterFactory) {
options.compaction_filter = nullptr;
options.compaction_filter_factory.reset(
new TestCompactionFilterFactory());
}
DestroyAndReopen(options);
// periodic_compaction_seconds should be set to the sanitized value when
// a compaction filter or a compaction filter factory is used.
ASSERT_EQ(30 * 24 * 60 * 60,
dbfull()->GetOptions().periodic_compaction_seconds);
int periodic_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
auto compaction_reason = compaction->compaction_reason();
if (compaction_reason == CompactionReason::kPeriodicCompaction) {
periodic_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
for (int i = 0; i < kNumLevelFiles; ++i) {
for (int j = 0; j < kNumKeysPerFile; ++j) {
ASSERT_OK(
Put(Key(i * kNumKeysPerFile + j), RandomString(&rnd, kValueSize)));
}
Flush();
}
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("2", FilesPerLevel());
ASSERT_EQ(0, periodic_compactions);
// Add 31 days and do a write
env_->addon_time_.fetch_add(31 * 24 * 60 * 60);
ASSERT_OK(Put("a", "1"));
Flush();
dbfull()->TEST_WaitForCompact();
// Assert that the files stay in the same level
ASSERT_EQ("3", FilesPerLevel());
// The two old files go through the periodic compaction process
ASSERT_EQ(2, periodic_compactions);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DBCompactionTest, CompactRangeDelayedByL0FileCount) {
// Verify that, when `CompactRangeOptions::allow_write_stall == false`, manual
// compaction only triggers flush after it's sure stall won't be triggered for
// L0 file count going too high.
const int kNumL0FilesTrigger = 4;
const int kNumL0FilesLimit = 8;
// i == 0: verifies normal case where stall is avoided by delay
// i == 1: verifies no delay in edge case where stall trigger is same as
// compaction trigger, so stall can't be avoided
for (int i = 0; i < 2; ++i) {
Options options = CurrentOptions();
options.level0_slowdown_writes_trigger = kNumL0FilesLimit;
if (i == 0) {
options.level0_file_num_compaction_trigger = kNumL0FilesTrigger;
} else {
options.level0_file_num_compaction_trigger = kNumL0FilesLimit;
}
Reopen(options);
if (i == 0) {
// ensure the auto compaction doesn't finish until manual compaction has
// had a chance to be delayed.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::WaitUntilFlushWouldNotStallWrites:StallWait",
"CompactionJob::Run():End"}});
} else {
// ensure the auto-compaction doesn't finish until manual compaction has
// continued without delay.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::FlushMemTable:StallWaitDone",
"CompactionJob::Run():End"}});
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int j = 0; j < kNumL0FilesLimit - 1; ++j) {
for (int k = 0; k < 2; ++k) {
ASSERT_OK(Put(Key(k), RandomString(&rnd, 1024)));
}
Flush();
}
auto manual_compaction_thread = port::Thread([this]() {
CompactRangeOptions cro;
cro.allow_write_stall = false;
db_->CompactRange(cro, nullptr, nullptr);
});
manual_compaction_thread.join();
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(0, NumTableFilesAtLevel(0));
ASSERT_GT(NumTableFilesAtLevel(1), 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DBCompactionTest, CompactRangeDelayedByImmMemTableCount) {
// Verify that, when `CompactRangeOptions::allow_write_stall == false`, manual
// compaction only triggers flush after it's sure stall won't be triggered for
// immutable memtable count going too high.
const int kNumImmMemTableLimit = 8;
// i == 0: verifies normal case where stall is avoided by delay
// i == 1: verifies no delay in edge case where stall trigger is same as flush
// trigger, so stall can't be avoided
for (int i = 0; i < 2; ++i) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
// the delay limit is one less than the stop limit. This test focuses on
// avoiding delay limit, but this option sets stop limit, so add one.
options.max_write_buffer_number = kNumImmMemTableLimit + 1;
if (i == 1) {
options.min_write_buffer_number_to_merge = kNumImmMemTableLimit;
}
Reopen(options);
if (i == 0) {
// ensure the flush doesn't finish until manual compaction has had a
// chance to be delayed.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::WaitUntilFlushWouldNotStallWrites:StallWait",
"FlushJob::WriteLevel0Table"}});
} else {
// ensure the flush doesn't finish until manual compaction has continued
// without delay.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::FlushMemTable:StallWaitDone",
"FlushJob::WriteLevel0Table"}});
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int j = 0; j < kNumImmMemTableLimit - 1; ++j) {
ASSERT_OK(Put(Key(0), RandomString(&rnd, 1024)));
FlushOptions flush_opts;
flush_opts.wait = false;
flush_opts.allow_write_stall = true;
dbfull()->Flush(flush_opts);
}
auto manual_compaction_thread = port::Thread([this]() {
CompactRangeOptions cro;
cro.allow_write_stall = false;
db_->CompactRange(cro, nullptr, nullptr);
});
manual_compaction_thread.join();
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ(0, NumTableFilesAtLevel(0));
ASSERT_GT(NumTableFilesAtLevel(1), 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DBCompactionTest, CompactRangeShutdownWhileDelayed) {
// Verify that, when `CompactRangeOptions::allow_write_stall == false`, delay
// does not hang if CF is dropped or DB is closed
const int kNumL0FilesTrigger = 4;
const int kNumL0FilesLimit = 8;
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = kNumL0FilesTrigger;
options.level0_slowdown_writes_trigger = kNumL0FilesLimit;
// i == 0: DB::DropColumnFamily() on CompactRange's target CF unblocks it
// i == 1: DB::CancelAllBackgroundWork() unblocks CompactRange. This is to
// simulate what happens during Close as we can't call Close (it
// blocks on the auto-compaction, making a cycle).
for (int i = 0; i < 2; ++i) {
CreateAndReopenWithCF({"one"}, options);
// The calls to close CF/DB wait until the manual compaction stalls.
// The auto-compaction waits until the manual compaction finishes to ensure
// the signal comes from closing CF/DB, not from compaction making progress.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::WaitUntilFlushWouldNotStallWrites:StallWait",
"DBCompactionTest::CompactRangeShutdownWhileDelayed:PreShutdown"},
{"DBCompactionTest::CompactRangeShutdownWhileDelayed:PostManual",
"CompactionJob::Run():End"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
for (int j = 0; j < kNumL0FilesLimit - 1; ++j) {
for (int k = 0; k < 2; ++k) {
ASSERT_OK(Put(1, Key(k), RandomString(&rnd, 1024)));
}
Flush(1);
}
auto manual_compaction_thread = port::Thread([this, i]() {
CompactRangeOptions cro;
cro.allow_write_stall = false;
Status s = db_->CompactRange(cro, handles_[1], nullptr, nullptr);
if (i == 0) {
ASSERT_TRUE(db_->CompactRange(cro, handles_[1], nullptr, nullptr)
.IsColumnFamilyDropped());
} else {
ASSERT_TRUE(db_->CompactRange(cro, handles_[1], nullptr, nullptr)
.IsShutdownInProgress());
}
});
TEST_SYNC_POINT(
"DBCompactionTest::CompactRangeShutdownWhileDelayed:PreShutdown");
if (i == 0) {
ASSERT_OK(db_->DropColumnFamily(handles_[1]));
} else {
dbfull()->CancelAllBackgroundWork(false /* wait */);
}
manual_compaction_thread.join();
TEST_SYNC_POINT(
"DBCompactionTest::CompactRangeShutdownWhileDelayed:PostManual");
dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
}
TEST_F(DBCompactionTest, CompactRangeSkipFlushAfterDelay) {
// Verify that, when `CompactRangeOptions::allow_write_stall == false`,
// CompactRange skips its flush if the delay is long enough that the memtables
// existing at the beginning of the call have already been flushed.
const int kNumL0FilesTrigger = 4;
const int kNumL0FilesLimit = 8;
Options options = CurrentOptions();
options.level0_slowdown_writes_trigger = kNumL0FilesLimit;
options.level0_file_num_compaction_trigger = kNumL0FilesTrigger;
Reopen(options);
Random rnd(301);
// The manual flush includes the memtable that was active when CompactRange
// began. So it unblocks CompactRange and precludes its flush. Throughout the
// test, stall conditions are upheld via high L0 file count.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::WaitUntilFlushWouldNotStallWrites:StallWait",
"DBCompactionTest::CompactRangeSkipFlushAfterDelay:PreFlush"},
{"DBCompactionTest::CompactRangeSkipFlushAfterDelay:PostFlush",
"DBImpl::FlushMemTable:StallWaitDone"},
{"DBImpl::FlushMemTable:StallWaitDone", "CompactionJob::Run():End"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
//used for the delayable flushes
FlushOptions flush_opts;
flush_opts.allow_write_stall = true;
for (int i = 0; i < kNumL0FilesLimit - 1; ++i) {
for (int j = 0; j < 2; ++j) {
ASSERT_OK(Put(Key(j), RandomString(&rnd, 1024)));
}
dbfull()->Flush(flush_opts);
}
auto manual_compaction_thread = port::Thread([this]() {
CompactRangeOptions cro;
cro.allow_write_stall = false;
db_->CompactRange(cro, nullptr, nullptr);
});
TEST_SYNC_POINT("DBCompactionTest::CompactRangeSkipFlushAfterDelay:PreFlush");
Put(ToString(0), RandomString(&rnd, 1024));
dbfull()->Flush(flush_opts);
Put(ToString(0), RandomString(&rnd, 1024));
TEST_SYNC_POINT("DBCompactionTest::CompactRangeSkipFlushAfterDelay:PostFlush");
manual_compaction_thread.join();
// If CompactRange's flush was skipped, the final Put above will still be
// in the active memtable.
std::string num_keys_in_memtable;
db_->GetProperty(DB::Properties::kNumEntriesActiveMemTable, &num_keys_in_memtable);
ASSERT_EQ(ToString(1), num_keys_in_memtable);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBCompactionTest, CompactRangeFlushOverlappingMemtable) {
// Verify memtable only gets flushed if it contains data overlapping the range
// provided to `CompactRange`. Tests all kinds of overlap/non-overlap.
const int kNumEndpointKeys = 5;
std::string keys[kNumEndpointKeys] = {"a", "b", "c", "d", "e"};
Options options = CurrentOptions();
options.disable_auto_compactions = true;
Reopen(options);
// One extra iteration for nullptr, which means left side of interval is
// unbounded.
for (int i = 0; i <= kNumEndpointKeys; ++i) {
Slice begin;
Slice* begin_ptr;
if (i == 0) {
begin_ptr = nullptr;
} else {
begin = keys[i - 1];
begin_ptr = &begin;
}
// Start at `i` so right endpoint comes after left endpoint. One extra
// iteration for nullptr, which means right side of interval is unbounded.
for (int j = std::max(0, i - 1); j <= kNumEndpointKeys; ++j) {
Slice end;
Slice* end_ptr;
if (j == kNumEndpointKeys) {
end_ptr = nullptr;
} else {
end = keys[j];
end_ptr = &end;
}
ASSERT_OK(Put("b", "val"));
ASSERT_OK(Put("d", "val"));
CompactRangeOptions compact_range_opts;
ASSERT_OK(db_->CompactRange(compact_range_opts, begin_ptr, end_ptr));
uint64_t get_prop_tmp, num_memtable_entries = 0;
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kNumEntriesImmMemTables,
&get_prop_tmp));
num_memtable_entries += get_prop_tmp;
ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kNumEntriesActiveMemTable,
&get_prop_tmp));
num_memtable_entries += get_prop_tmp;
if (begin_ptr == nullptr || end_ptr == nullptr ||
(i <= 4 && j >= 1 && (begin != "c" || end != "c"))) {
// In this case `CompactRange`'s range overlapped in some way with the
// memtable's range, so flush should've happened. Then "b" and "d" won't
// be in the memtable.
ASSERT_EQ(0, num_memtable_entries);
} else {
ASSERT_EQ(2, num_memtable_entries);
// flush anyways to prepare for next iteration
db_->Flush(FlushOptions());
}
}
}
}
TEST_F(DBCompactionTest, CompactionStatsTest) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 2;
CompactionStatsCollector* collector = new CompactionStatsCollector();
options.listeners.emplace_back(collector);
DestroyAndReopen(options);
for (int i = 0; i < 32; i++) {
for (int j = 0; j < 5000; j++) {
Put(std::to_string(j), std::string(1, 'A'));
}
ASSERT_OK(Flush());
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
}
dbfull()->TEST_WaitForCompact();
ColumnFamilyHandleImpl* cfh =
static_cast<ColumnFamilyHandleImpl*>(dbfull()->DefaultColumnFamily());
ColumnFamilyData* cfd = cfh->cfd();
VerifyCompactionStats(*cfd, *collector);
}
TEST_F(DBCompactionTest, CompactFilesOutputRangeConflict) {
// LSM setup:
// L1: [ba bz]
// L2: [a b] [c d]
// L3: [a b] [c d]
//
// Thread 1: Thread 2:
// Begin compacting all L2->L3
// Compact [ba bz] L1->L3
// End compacting all L2->L3
//
// The compaction operation in thread 2 should be disallowed because the range
// overlaps with the compaction in thread 1, which also covers that range in
// L3.
Options options = CurrentOptions();
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
Reopen(options);
for (int level = 3; level >= 2; --level) {
ASSERT_OK(Put("a", "val"));
ASSERT_OK(Put("b", "val"));
ASSERT_OK(Flush());
ASSERT_OK(Put("c", "val"));
ASSERT_OK(Put("d", "val"));
ASSERT_OK(Flush());
MoveFilesToLevel(level);
}
ASSERT_OK(Put("ba", "val"));
ASSERT_OK(Put("bz", "val"));
ASSERT_OK(Flush());
MoveFilesToLevel(1);
SyncPoint::GetInstance()->LoadDependency({
{"CompactFilesImpl:0",
"DBCompactionTest::CompactFilesOutputRangeConflict:Thread2Begin"},
{"DBCompactionTest::CompactFilesOutputRangeConflict:Thread2End",
"CompactFilesImpl:1"},
});
SyncPoint::GetInstance()->EnableProcessing();
auto bg_thread = port::Thread([&]() {
// Thread 1
std::vector<std::string> filenames = collector->GetFlushedFiles();
filenames.pop_back();
ASSERT_OK(db_->CompactFiles(CompactionOptions(), filenames,
3 /* output_level */));
});
// Thread 2
TEST_SYNC_POINT(
"DBCompactionTest::CompactFilesOutputRangeConflict:Thread2Begin");
std::string filename = collector->GetFlushedFiles().back();
ASSERT_FALSE(
db_->CompactFiles(CompactionOptions(), {filename}, 3 /* output_level */)
.ok());
TEST_SYNC_POINT(
"DBCompactionTest::CompactFilesOutputRangeConflict:Thread2End");
bg_thread.join();
}
TEST_F(DBCompactionTest, CompactionHasEmptyOutput) {
Options options = CurrentOptions();
SstStatsCollector* collector = new SstStatsCollector();
options.level0_file_num_compaction_trigger = 2;
options.listeners.emplace_back(collector);
Reopen(options);
// Make sure the L0 files overlap to prevent trivial move.
ASSERT_OK(Put("a", "val"));
ASSERT_OK(Put("b", "val"));
ASSERT_OK(Flush());
ASSERT_OK(Delete("a"));
ASSERT_OK(Delete("b"));
ASSERT_OK(Flush());
dbfull()->TEST_WaitForCompact();
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
// Expect one file creation to start for each flush, and zero for compaction
// since no keys are written.
ASSERT_EQ(2, collector->num_ssts_creation_started());
}
TEST_F(DBCompactionTest, CompactionLimiter) {
const int kNumKeysPerFile = 10;
const int kMaxBackgroundThreads = 64;
struct CompactionLimiter {
std::string name;
int limit_tasks;
int max_tasks;
int tasks;
std::shared_ptr<ConcurrentTaskLimiter> limiter;
};
std::vector<CompactionLimiter> limiter_settings;
limiter_settings.push_back({"limiter_1", 1, 0, 0, nullptr});
limiter_settings.push_back({"limiter_2", 2, 0, 0, nullptr});
limiter_settings.push_back({"limiter_3", 3, 0, 0, nullptr});
for (auto& ls : limiter_settings) {
ls.limiter.reset(NewConcurrentTaskLimiter(ls.name, ls.limit_tasks));
}
std::shared_ptr<ConcurrentTaskLimiter> unique_limiter(
NewConcurrentTaskLimiter("unique_limiter", -1));
const char* cf_names[] = {"default", "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
const unsigned int cf_count = sizeof cf_names / sizeof cf_names[0];
std::unordered_map<std::string, CompactionLimiter*> cf_to_limiter;
Options options = CurrentOptions();
options.write_buffer_size = 110 * 1024; // 110KB
options.arena_block_size = 4096;
options.num_levels = 3;
options.level0_file_num_compaction_trigger = 4;
options.level0_slowdown_writes_trigger = 64;
options.level0_stop_writes_trigger = 64;
options.max_background_jobs = kMaxBackgroundThreads; // Enough threads
options.memtable_factory.reset(new SpecialSkipListFactory(kNumKeysPerFile));
options.max_write_buffer_number = 10; // Enough memtables
DestroyAndReopen(options);
std::vector<Options> option_vector;
option_vector.reserve(cf_count);
for (unsigned int cf = 0; cf < cf_count; cf++) {
ColumnFamilyOptions cf_opt(options);
if (cf == 0) {
// "Default" CF does't use compaction limiter
cf_opt.compaction_thread_limiter = nullptr;
} else if (cf == 1) {
// "1" CF uses bypass compaction limiter
unique_limiter->SetMaxOutstandingTask(-1);
cf_opt.compaction_thread_limiter = unique_limiter;
} else {
// Assign limiter by mod
auto& ls = limiter_settings[cf % 3];
cf_opt.compaction_thread_limiter = ls.limiter;
cf_to_limiter[cf_names[cf]] = &ls;
}
option_vector.emplace_back(DBOptions(options), cf_opt);
}
for (unsigned int cf = 1; cf < cf_count; cf++) {
CreateColumnFamilies({cf_names[cf]}, option_vector[cf]);
}
ReopenWithColumnFamilies(std::vector<std::string>(cf_names,
cf_names + cf_count),
option_vector);
port::Mutex mutex;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:BeforeCompaction", [&](void* arg) {
const auto& cf_name = static_cast<ColumnFamilyData*>(arg)->GetName();
auto iter = cf_to_limiter.find(cf_name);
if (iter != cf_to_limiter.end()) {
MutexLock l(&mutex);
ASSERT_GE(iter->second->limit_tasks, ++iter->second->tasks);
iter->second->max_tasks =
std::max(iter->second->max_tasks, iter->second->limit_tasks);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:AfterCompaction", [&](void* arg) {
const auto& cf_name = static_cast<ColumnFamilyData*>(arg)->GetName();
auto iter = cf_to_limiter.find(cf_name);
if (iter != cf_to_limiter.end()) {
MutexLock l(&mutex);
ASSERT_GE(--iter->second->tasks, 0);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Block all compact threads in thread pool.
const size_t kTotalFlushTasks = kMaxBackgroundThreads / 4;
const size_t kTotalCompactTasks = kMaxBackgroundThreads - kTotalFlushTasks;
env_->SetBackgroundThreads((int)kTotalFlushTasks, Env::HIGH);
env_->SetBackgroundThreads((int)kTotalCompactTasks, Env::LOW);
test::SleepingBackgroundTask sleeping_compact_tasks[kTotalCompactTasks];
// Block all compaction threads in thread pool.
for (size_t i = 0; i < kTotalCompactTasks; i++) {
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask,
&sleeping_compact_tasks[i], Env::LOW);
sleeping_compact_tasks[i].WaitUntilSleeping();
}
int keyIndex = 0;
for (int n = 0; n < options.level0_file_num_compaction_trigger; n++) {
for (unsigned int cf = 0; cf < cf_count; cf++) {
for (int i = 0; i < kNumKeysPerFile; i++) {
ASSERT_OK(Put(cf, Key(keyIndex++), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(cf, "", ""));
}
for (unsigned int cf = 0; cf < cf_count; cf++) {
dbfull()->TEST_WaitForFlushMemTable(handles_[cf]);
}
}
// Enough L0 files to trigger compaction
for (unsigned int cf = 0; cf < cf_count; cf++) {
ASSERT_EQ(NumTableFilesAtLevel(0, cf),
options.level0_file_num_compaction_trigger);
}
// Create more files for one column family, which triggers speed up
// condition, all 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(0, Key(i), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(0, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[0]);
ASSERT_EQ(options.level0_file_num_compaction_trigger + num + 1,
NumTableFilesAtLevel(0, 0));
}
// All CFs are pending compaction
ASSERT_EQ(cf_count, env_->GetThreadPoolQueueLen(Env::LOW));
// Unblock all compaction threads
for (size_t i = 0; i < kTotalCompactTasks; i++) {
sleeping_compact_tasks[i].WakeUp();
sleeping_compact_tasks[i].WaitUntilDone();
}
for (unsigned int cf = 0; cf < cf_count; cf++) {
dbfull()->TEST_WaitForFlushMemTable(handles_[cf]);
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Max outstanding compact tasks reached limit
for (auto& ls : limiter_settings) {
ASSERT_EQ(ls.limit_tasks, ls.max_tasks);
ASSERT_EQ(0, ls.limiter->GetOutstandingTask());
}
// test manual compaction under a fully throttled limiter
int cf_test = 1;
unique_limiter->SetMaxOutstandingTask(0);
// flush one more file to cf 1
for (int i = 0; i < kNumKeysPerFile; i++) {
ASSERT_OK(Put(cf_test, Key(keyIndex++), ""));
}
// put extra key to trigger flush
ASSERT_OK(Put(cf_test, "", ""));
dbfull()->TEST_WaitForFlushMemTable(handles_[cf_test]);
ASSERT_EQ(1, NumTableFilesAtLevel(0, cf_test));
Compact(cf_test, Key(0), Key(keyIndex));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
}
INSTANTIATE_TEST_CASE_P(DBCompactionTestWithParam, DBCompactionTestWithParam,
::testing::Values(std::make_tuple(1, true),
std::make_tuple(1, false),
std::make_tuple(4, true),
std::make_tuple(4, false)));
TEST_P(DBCompactionDirectIOTest, DirectIO) {
Options options = CurrentOptions();
Destroy(options);
options.create_if_missing = true;
options.disable_auto_compactions = true;
options.use_direct_io_for_flush_and_compaction = GetParam();
options.env = new MockEnv(Env::Default());
Reopen(options);
bool readahead = false;
SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::OpenCompactionOutputFile", [&](void* arg) {
bool* use_direct_writes = static_cast<bool*>(arg);
ASSERT_EQ(*use_direct_writes,
options.use_direct_io_for_flush_and_compaction);
});
if (options.use_direct_io_for_flush_and_compaction) {
SyncPoint::GetInstance()->SetCallBack(
"SanitizeOptions:direct_io", [&](void* /*arg*/) {
readahead = true;
});
}
SyncPoint::GetInstance()->EnableProcessing();
CreateAndReopenWithCF({"pikachu"}, options);
MakeTables(3, "p", "q", 1);
ASSERT_EQ("1,1,1", FilesPerLevel(1));
Compact(1, "p", "q");
ASSERT_EQ(readahead, options.use_direct_reads);
ASSERT_EQ("0,0,1", FilesPerLevel(1));
Destroy(options);
delete options.env;
}
INSTANTIATE_TEST_CASE_P(DBCompactionDirectIOTest, DBCompactionDirectIOTest,
testing::Bool());
class CompactionPriTest : public DBTestBase,
public testing::WithParamInterface<uint32_t> {
public:
CompactionPriTest() : DBTestBase("/compaction_pri_test") {
compaction_pri_ = GetParam();
}
// Required if inheriting from testing::WithParamInterface<>
static void SetUpTestCase() {}
static void TearDownTestCase() {}
uint32_t compaction_pri_;
};
TEST_P(CompactionPriTest, Test) {
Options options = CurrentOptions();
options.write_buffer_size = 16 * 1024;
options.compaction_pri = static_cast<CompactionPri>(compaction_pri_);
options.hard_pending_compaction_bytes_limit = 256 * 1024;
options.max_bytes_for_level_base = 64 * 1024;
options.max_bytes_for_level_multiplier = 4;
options.compression = kNoCompression;
DestroyAndReopen(options);
Random rnd(301);
const int kNKeys = 5000;
int keys[kNKeys];
for (int i = 0; i < kNKeys; i++) {
keys[i] = i;
}
std::random_shuffle(std::begin(keys), std::end(keys));
for (int i = 0; i < kNKeys; i++) {
ASSERT_OK(Put(Key(keys[i]), RandomString(&rnd, 102)));
}
dbfull()->TEST_WaitForCompact();
for (int i = 0; i < kNKeys; i++) {
ASSERT_NE("NOT_FOUND", Get(Key(i)));
}
}
INSTANTIATE_TEST_CASE_P(
CompactionPriTest, CompactionPriTest,
::testing::Values(CompactionPri::kByCompensatedSize,
CompactionPri::kOldestLargestSeqFirst,
CompactionPri::kOldestSmallestSeqFirst,
CompactionPri::kMinOverlappingRatio));
class NoopMergeOperator : public MergeOperator {
public:
NoopMergeOperator() {}
bool FullMergeV2(const MergeOperationInput& /*merge_in*/,
MergeOperationOutput* merge_out) const override {
std::string val("bar");
merge_out->new_value = val;
return true;
}
const char* Name() const override { return "Noop"; }
};
TEST_F(DBCompactionTest, PartialManualCompaction) {
Options opts = CurrentOptions();
opts.num_levels = 3;
opts.level0_file_num_compaction_trigger = 10;
opts.compression = kNoCompression;
opts.merge_operator.reset(new NoopMergeOperator());
opts.target_file_size_base = 10240;
DestroyAndReopen(opts);
Random rnd(301);
for (auto i = 0; i < 8; ++i) {
for (auto j = 0; j < 10; ++j) {
Merge("foo", RandomString(&rnd, 1024));
}
Flush();
}
MoveFilesToLevel(2);
std::string prop;
EXPECT_TRUE(dbfull()->GetProperty(DB::Properties::kLiveSstFilesSize, &prop));
uint64_t max_compaction_bytes = atoi(prop.c_str()) / 2;
ASSERT_OK(dbfull()->SetOptions(
{{"max_compaction_bytes", std::to_string(max_compaction_bytes)}}));
CompactRangeOptions cro;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForceOptimized;
dbfull()->CompactRange(cro, nullptr, nullptr);
}
TEST_F(DBCompactionTest, ManualCompactionFailsInReadOnlyMode) {
// Regression test for bug where manual compaction hangs forever when the DB
// is in read-only mode. Verify it now at least returns, despite failing.
const int kNumL0Files = 4;
std::unique_ptr<FaultInjectionTestEnv> mock_env(
new FaultInjectionTestEnv(Env::Default()));
Options opts = CurrentOptions();
opts.disable_auto_compactions = true;
opts.env = mock_env.get();
DestroyAndReopen(opts);
Random rnd(301);
for (int i = 0; i < kNumL0Files; ++i) {
// Make sure files are overlapping in key-range to prevent trivial move.
Put("key1", RandomString(&rnd, 1024));
Put("key2", RandomString(&rnd, 1024));
Flush();
}
ASSERT_EQ(kNumL0Files, NumTableFilesAtLevel(0));
// Enter read-only mode by failing a write.
mock_env->SetFilesystemActive(false);
// Make sure this is outside `CompactRange`'s range so that it doesn't fail
// early trying to flush memtable.
ASSERT_NOK(Put("key3", RandomString(&rnd, 1024)));
// In the bug scenario, the first manual compaction would fail and forget to
// unregister itself, causing the second one to hang forever due to conflict
// with a non-running compaction.
CompactRangeOptions cro;
cro.exclusive_manual_compaction = false;
Slice begin_key("key1");
Slice end_key("key2");
ASSERT_NOK(dbfull()->CompactRange(cro, &begin_key, &end_key));
ASSERT_NOK(dbfull()->CompactRange(cro, &begin_key, &end_key));
// Close before mock_env destruct.
Close();
}
// ManualCompactionBottomLevelOptimization tests the bottom level manual
// compaction optimization to skip recompacting files created by Ln-1 to Ln
// compaction
TEST_F(DBCompactionTest, ManualCompactionBottomLevelOptimized) {
Options opts = CurrentOptions();
opts.num_levels = 3;
opts.level0_file_num_compaction_trigger = 5;
opts.compression = kNoCompression;
opts.merge_operator.reset(new NoopMergeOperator());
opts.target_file_size_base = 1024;
opts.max_bytes_for_level_multiplier = 2;
opts.disable_auto_compactions = true;
DestroyAndReopen(opts);
ColumnFamilyHandleImpl* cfh =
static_cast<ColumnFamilyHandleImpl*>(dbfull()->DefaultColumnFamily());
ColumnFamilyData* cfd = cfh->cfd();
InternalStats* internal_stats_ptr = cfd->internal_stats();
ASSERT_NE(internal_stats_ptr, nullptr);
Random rnd(301);
for (auto i = 0; i < 8; ++i) {
for (auto j = 0; j < 10; ++j) {
ASSERT_OK(
Put("foo" + std::to_string(i * 10 + j), RandomString(&rnd, 1024)));
}
Flush();
}
MoveFilesToLevel(2);
for (auto i = 0; i < 8; ++i) {
for (auto j = 0; j < 10; ++j) {
ASSERT_OK(
Put("bar" + std::to_string(i * 10 + j), RandomString(&rnd, 1024)));
}
Flush();
}
const std::vector<InternalStats::CompactionStats>& comp_stats =
internal_stats_ptr->TEST_GetCompactionStats();
int num = comp_stats[2].num_input_files_in_output_level;
ASSERT_EQ(num, 0);
CompactRangeOptions cro;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForceOptimized;
dbfull()->CompactRange(cro, nullptr, nullptr);
const std::vector<InternalStats::CompactionStats>& comp_stats2 =
internal_stats_ptr->TEST_GetCompactionStats();
num = comp_stats2[2].num_input_files_in_output_level;
ASSERT_EQ(num, 0);
}
TEST_F(DBCompactionTest, CompactionDuringShutdown) {
Options opts = CurrentOptions();
opts.level0_file_num_compaction_trigger = 2;
opts.disable_auto_compactions = true;
DestroyAndReopen(opts);
ColumnFamilyHandleImpl* cfh =
static_cast<ColumnFamilyHandleImpl*>(dbfull()->DefaultColumnFamily());
ColumnFamilyData* cfd = cfh->cfd();
InternalStats* internal_stats_ptr = cfd->internal_stats();
ASSERT_NE(internal_stats_ptr, nullptr);
Random rnd(301);
for (auto i = 0; i < 2; ++i) {
for (auto j = 0; j < 10; ++j) {
ASSERT_OK(
Put("foo" + std::to_string(i * 10 + j), RandomString(&rnd, 1024)));
}
Flush();
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial:BeforeRun",
[&](void* /*arg*/) { dbfull()->shutting_down_.store(true); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_OK(dbfull()->error_handler_.GetBGError());
}
// FixFileIngestionCompactionDeadlock tests and verifies that compaction and
// file ingestion do not cause deadlock in the event of write stall triggered
// by number of L0 files reaching level0_stop_writes_trigger.
TEST_P(DBCompactionTestWithParam, FixFileIngestionCompactionDeadlock) {
const int kNumKeysPerFile = 100;
// Generate SST files.
Options options = CurrentOptions();
// Generate an external SST file containing a single key, i.e. 99
std::string sst_files_dir = dbname_ + "/sst_files/";
test::DestroyDir(env_, sst_files_dir);
ASSERT_OK(env_->CreateDir(sst_files_dir));
SstFileWriter sst_writer(EnvOptions(), options);
const std::string sst_file_path = sst_files_dir + "test.sst";
ASSERT_OK(sst_writer.Open(sst_file_path));
ASSERT_OK(sst_writer.Put(Key(kNumKeysPerFile - 1), "value"));
ASSERT_OK(sst_writer.Finish());
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
SyncPoint::GetInstance()->LoadDependency({
{"DBImpl::IngestExternalFile:AfterIncIngestFileCounter",
"BackgroundCallCompaction:0"},
});
SyncPoint::GetInstance()->EnableProcessing();
options.write_buffer_size = 110 << 10; // 110KB
options.level0_file_num_compaction_trigger =
options.level0_stop_writes_trigger;
options.max_subcompactions = max_subcompactions_;
options.memtable_factory.reset(new SpecialSkipListFactory(kNumKeysPerFile));
DestroyAndReopen(options);
Random rnd(301);
// Generate level0_stop_writes_trigger L0 files to trigger write stop
for (int i = 0; i != options.level0_file_num_compaction_trigger; ++i) {
for (int j = 0; j != kNumKeysPerFile; ++j) {
ASSERT_OK(Put(Key(j), RandomString(&rnd, 990)));
}
if (0 == i) {
// When we reach here, the memtables have kNumKeysPerFile keys. Note that
// flush is not yet triggered. We need to write an extra key so that the
// write path will call PreprocessWrite and flush the previous key-value
// pairs to e flushed. After that, there will be the newest key in the
// memtable, and a bunch of L0 files. Since there is already one key in
// the memtable, then for i = 1, 2, ..., we do not have to write this
// extra key to trigger flush.
ASSERT_OK(Put("", ""));
}
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ(NumTableFilesAtLevel(0 /*level*/, 0 /*cf*/), i + 1);
}
// When we reach this point, there will be level0_stop_writes_trigger L0
// files and one extra key (99) in memory, which overlaps with the external
// SST file. Write stall triggers, and can be cleared only after compaction
// reduces the number of L0 files.
// Compaction will also be triggered since we have reached the threshold for
// auto compaction. Note that compaction may begin after the following file
// ingestion thread and waits for ingestion to finish.
// Thread to ingest file with overlapping key range with the current
// memtable. Consequently ingestion will trigger a flush. The flush MUST
// proceed without waiting for the write stall condition to clear, otherwise
// deadlock can happen.
port::Thread ingestion_thr([&]() {
IngestExternalFileOptions ifo;
Status s = db_->IngestExternalFile({sst_file_path}, ifo);
ASSERT_OK(s);
});
// More write to trigger write stop
ingestion_thr.join();
ASSERT_OK(dbfull()->TEST_WaitForCompact());
Close();
}
TEST_F(DBCompactionTest, ConsistencyFailTest) {
Options options = CurrentOptions();
DestroyAndReopen(options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"VersionBuilder::CheckConsistency", [&](void* arg) {
auto p =
reinterpret_cast<std::pair<FileMetaData**, FileMetaData**>*>(arg);
// just swap the two FileMetaData so that we hit error
// in CheckConsistency funcion
FileMetaData* temp = *(p->first);
*(p->first) = *(p->second);
*(p->second) = temp;
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
for (int k = 0; k < 2; ++k) {
ASSERT_OK(Put("foo", "bar"));
Flush();
}
ASSERT_NOK(Put("foo", "bar"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
void IngestOneKeyValue(DBImpl* db, const std::string& key,
const std::string& value, const Options& options) {
ExternalSstFileInfo info;
std::string f = test::PerThreadDBPath("sst_file" + key);
EnvOptions env;
ROCKSDB_NAMESPACE::SstFileWriter writer(env, options);
auto s = writer.Open(f);
ASSERT_OK(s);
// ASSERT_OK(writer.Put(Key(), ""));
ASSERT_OK(writer.Put(key, value));
ASSERT_OK(writer.Finish(&info));
IngestExternalFileOptions ingest_opt;
ASSERT_OK(db->IngestExternalFile({info.file_path}, ingest_opt));
}
TEST_P(DBCompactionTestWithParam,
FlushAfterIntraL0CompactionCheckConsistencyFail) {
Options options = CurrentOptions();
options.force_consistency_checks = true;
options.compression = kNoCompression;
options.level0_file_num_compaction_trigger = 5;
options.max_background_compactions = 2;
options.max_subcompactions = max_subcompactions_;
DestroyAndReopen(options);
const size_t kValueSize = 1 << 20;
Random rnd(301);
std::atomic<int> pick_intra_l0_count(0);
std::string value(RandomString(&rnd, kValueSize));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompactionTestWithParam::FlushAfterIntraL0:1",
"CompactionJob::Run():Start"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"FindIntraL0Compaction",
[&](void* /*arg*/) { pick_intra_l0_count.fetch_add(1); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// prevents trivial move
for (int i = 0; i < 10; ++i) {
ASSERT_OK(Put(Key(i), "")); // prevents trivial move
}
ASSERT_OK(Flush());
Compact("", Key(99));
ASSERT_EQ(0, NumTableFilesAtLevel(0));
// Flush 5 L0 sst.
for (int i = 0; i < 5; ++i) {
ASSERT_OK(Put(Key(i + 1), value));
ASSERT_OK(Flush());
}
ASSERT_EQ(5, NumTableFilesAtLevel(0));
// Put one key, to make smallest log sequence number in this memtable is less
// than sst which would be ingested in next step.
ASSERT_OK(Put(Key(0), "a"));
ASSERT_EQ(5, NumTableFilesAtLevel(0));
// Ingest 5 L0 sst. And this files would trigger PickIntraL0Compaction.
for (int i = 5; i < 10; i++) {
IngestOneKeyValue(dbfull(), Key(i), value, options);
ASSERT_EQ(i + 1, NumTableFilesAtLevel(0));
}
TEST_SYNC_POINT("DBCompactionTestWithParam::FlushAfterIntraL0:1");
// Put one key, to make biggest log sequence number in this memtable is bigger
// than sst which would be ingested in next step.
ASSERT_OK(Put(Key(2), "b"));
ASSERT_EQ(10, NumTableFilesAtLevel(0));
dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
std::vector<std::vector<FileMetaData>> level_to_files;
dbfull()->TEST_GetFilesMetaData(dbfull()->DefaultColumnFamily(),
&level_to_files);
ASSERT_GT(level_to_files[0].size(), 0);
ASSERT_GT(pick_intra_l0_count.load(), 0);
ASSERT_OK(Flush());
}
TEST_P(DBCompactionTestWithParam,
IntraL0CompactionAfterFlushCheckConsistencyFail) {
Options options = CurrentOptions();
options.force_consistency_checks = true;
options.compression = kNoCompression;
options.level0_file_num_compaction_trigger = 5;
options.max_background_compactions = 2;
options.max_subcompactions = max_subcompactions_;
options.write_buffer_size = 2 << 20;
options.max_write_buffer_number = 6;
DestroyAndReopen(options);
const size_t kValueSize = 1 << 20;
Random rnd(301);
std::string value(RandomString(&rnd, kValueSize));
std::string value2(RandomString(&rnd, kValueSize));
std::string bigvalue = value + value;
// prevents trivial move
for (int i = 0; i < 10; ++i) {
ASSERT_OK(Put(Key(i), "")); // prevents trivial move
}
ASSERT_OK(Flush());
Compact("", Key(99));
ASSERT_EQ(0, NumTableFilesAtLevel(0));
std::atomic<int> pick_intra_l0_count(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompactionTestWithParam::IntraL0CompactionAfterFlush:1",
"CompactionJob::Run():Start"}});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"FindIntraL0Compaction",
[&](void* /*arg*/) { pick_intra_l0_count.fetch_add(1); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Make 6 L0 sst.
for (int i = 0; i < 6; ++i) {
if (i % 2 == 0) {
IngestOneKeyValue(dbfull(), Key(i), value, options);
} else {
ASSERT_OK(Put(Key(i), value));
ASSERT_OK(Flush());
}
}
ASSERT_EQ(6, NumTableFilesAtLevel(0));
// Stop run flush job
env_->SetBackgroundThreads(1, Env::HIGH);
test::SleepingBackgroundTask sleeping_tasks;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_tasks,
Env::Priority::HIGH);
sleeping_tasks.WaitUntilSleeping();
// Put many keys to make memtable request to flush
for (int i = 0; i < 6; ++i) {
ASSERT_OK(Put(Key(i), bigvalue));
}
ASSERT_EQ(6, NumTableFilesAtLevel(0));
// ingest file to trigger IntraL0Compaction
for (int i = 6; i < 10; ++i) {
ASSERT_EQ(i, NumTableFilesAtLevel(0));
IngestOneKeyValue(dbfull(), Key(i), value2, options);
}
ASSERT_EQ(10, NumTableFilesAtLevel(0));
// Wake up flush job
sleeping_tasks.WakeUp();
sleeping_tasks.WaitUntilDone();
TEST_SYNC_POINT("DBCompactionTestWithParam::IntraL0CompactionAfterFlush:1");
dbfull()->TEST_WaitForCompact();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
uint64_t error_count = 0;
db_->GetIntProperty("rocksdb.background-errors", &error_count);
ASSERT_EQ(error_count, 0);
ASSERT_GT(pick_intra_l0_count.load(), 0);
for (int i = 0; i < 6; ++i) {
ASSERT_EQ(bigvalue, Get(Key(i)));
}
for (int i = 6; i < 10; ++i) {
ASSERT_EQ(value2, Get(Key(i)));
}
}
#endif // !defined(ROCKSDB_LITE)
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
#if !defined(ROCKSDB_LITE)
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
#else
(void) argc;
(void) argv;
return 0;
#endif
}
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