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7fe3b32896
rocksdb/db/db_compaction_test.cc
Mikhail Antonov 7fe3b32896 Added support for differential snapshots 
Summary:
The motivation for this PR is to add to RocksDB support for differential (incremental) snapshots, as snapshot of the DB changes between two points in time (one can think of it as diff between to sequence numbers, or the diff D which can be thought of as an SST file or just set of KVs that can be applied to sequence number S1 to get the database to the state at sequence number S2).

This feature would be useful for various distributed storages layers built on top of RocksDB, as it should help reduce resources (time and network bandwidth) needed to recover and rebuilt DB instances as replicas in the context of distributed storages.

From the API standpoint that would like client app requesting iterator between (start seqnum) and current DB state, and reading the "diff".

This is a very draft PR for initial review in the discussion on the approach, i'm going to rework some parts and keep updating the PR.

For now, what's done here according to initial discussions:

Preserving deletes:
 - We want to be able to optionally preserve recent deletes for some defined period of time, so that if a delete came in recently and might need to be included in the next incremental snapshot it would't get dropped by a compaction. This is done by adding new param to Options (preserve deletes flag) and new variable to DB Impl where we keep track of the sequence number after which we don't want to drop tombstones, even if they are otherwise eligible for deletion.
 - I also added a new API call for clients to be able to advance this cutoff seqnum after which we drop deletes; i assume it's more flexible to let clients control this, since otherwise we'd need to keep some kind of timestamp < -- > seqnum mapping inside the DB, which sounds messy and painful to support. Clients could make use of it by periodically calling GetLatestSequenceNumber(), noting the timestamp, doing some calculation and figuring out by how much we need to advance the cutoff seqnum.
 - Compaction codepath in compaction_iterator.cc has been modified to avoid dropping tombstones with seqnum > cutoff seqnum.

Iterator changes:
 - couple params added to ReadOptions, to optionally allow client to request internal keys instead of user keys (so that client can get the latest value of a key, be it delete marker or a put), as well as min timestamp and min seqnum.

TableCache changes:
 - I modified table_cache code to be able to quickly exclude SST files from iterators heep if creation_time on the file is less then iter_start_ts as passed in ReadOptions. That would help a lot in some DB settings (like reading very recent data only or using FIFO compactions), but not so much for universal compaction with more or less long iterator time span.

What's left:

 - Still looking at how to best plug that inside DBIter codepath. So far it seems that FindNextUserKeyInternal only parses values as UserKeys, and iter->key() call generally returns user key. Can we add new API to DBIter as internal_key(), and modify this internal method to optionally set saved_key_ to point to the full internal key? I don't need to store actual seqnum there, but I do need to store type.
Closes https://github.com/facebook/rocksdb/pull/2999

Differential Revision: D6175602

Pulled By: mikhail-antonov

fbshipit-source-id: c779a6696ee2d574d86c69cec866a3ae095aa900
2017-11-01 18:56:43 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "port/port.h"
#include "rocksdb/experimental.h"
#include "rocksdb/utilities/convenience.h"
#include "util/sync_point.h"
namespace rocksdb {
// 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() {}
virtual 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_;
};
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_number_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->Compare(a.smallestkey, b.smallestkey) >= 0) {
if (c->Compare(a.smallestkey, b.largestkey) <= 0) {
// b.smallestkey <= a.smallestkey <= b.largestkey
return true;
}
} else if (c->Compare(a.largestkey, b.smallestkey) >= 0) {
// a.smallestkey < b.smallestkey <= a.largestkey
return true;
}
if (c->Compare(a.largestkey, b.largestkey) <= 0) {
if (c->Compare(a.largestkey, b.smallestkey) >= 0) {
// b.smallestkey <= a.largestkey <= b.largestkey
return true;
}
} else if (c->Compare(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
}
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
// 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]);
}
}
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::kForce;
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.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]));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
// Reopen the DB with stats-update disabled
options.skip_stats_update_on_db_open = true;
env_->random_file_open_counter_.store(0);
Reopen(options);
// As stats-update is disabled, we expect a very low number of
// random file open.
// Note that this number must be changed accordingly if we change
// the number of files needed to be opened in the DB::Open process.
const int kMaxFileOpenCount = 10;
ASSERT_LT(env_->random_file_open_counter_.load(), kMaxFileOpenCount);
// Repeat the reopen process, but this time we enable
// stats-update.
options.skip_stats_update_on_db_open = false;
env_->random_file_open_counter_.store(0);
Reopen(options);
// Since we do a normal stats update on db-open, there
// will be more random open files.
ASSERT_GT(env_->random_file_open_counter_.load(), kMaxFileOpenCount);
}
TEST_F(DBCompactionTest, TestTableReaderForCompaction) {
Options options = CurrentOptions();
options.env = env_;
options.new_table_reader_for_compaction_inputs = true;
options.max_open_files = 100;
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::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::SyncPoint::GetInstance()->SetCallBack(
"TableCache::GetTableReader:0",
[&](void* arg) { num_new_table_reader++; });
rocksdb::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.
ASSERT_EQ(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(num_table_cache_lookup, 1);
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
ASSERT_EQ(num_table_cache_lookup, 2);
// Create new iterator for:
// (1) 1 for verifying flush results
// (2) 3 for compaction input files
// (3) 1 for verifying compaction results.
ASSERT_EQ(num_new_table_reader, 5);
num_table_cache_lookup = 0;
num_new_table_reader = 0;
ASSERT_EQ(Key(1), Get(Key(1)));
ASSERT_EQ(num_table_cache_lookup, 1);
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::kForce;
db_->CompactRange(cro, nullptr, nullptr);
// Only verifying compaction outputs issues one table cache lookup
// for both data block and range deletion block).
ASSERT_EQ(num_table_cache_lookup, 1);
// One for compaction input, one for verifying compaction results.
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, 1);
ASSERT_EQ(num_new_table_reader, 0);
rocksdb::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, 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(1, 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(3, 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(1, 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::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::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::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, TrivialMoveNonOverlappingFiles) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial_move++; });
rocksdb::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::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, TrivialMoveTargetLevel) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial_move++; });
rocksdb::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::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::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::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompaction::ManualPartial:4", "DBCompaction::ManualPartial:1"},
{"DBCompaction::ManualPartial:5", "DBCompaction::ManualPartial:2"},
{"DBCompaction::ManualPartial:5", "DBCompaction::ManualPartial:3"}});
rocksdb::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::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::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::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial_move++; });
bool first = true;
bool second = true;
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"DBCompaction::PartialFill:4", "DBCompaction::PartialFill:1"},
{"DBCompaction::PartialFill:2", "DBCompaction::PartialFill:3"}});
rocksdb::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::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::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, 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(dbfull()->TEST_CompactRange(0, nullptr, nullptr));
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_P(DBCompactionTestWithParam, TrivialMoveToLastLevelWithFiles) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial_move++; });
rocksdb::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::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, 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;
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::SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::BGWorkCompaction", "DBCompactionTest::ManualAutoRace:1"},
{"DBImpl::RunManualCompaction:WaitScheduled",
"BackgroundCallCompaction:0"}});
rocksdb::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::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBCompactionTestWithParam, ManualCompaction) {
Options options = CurrentOptions();
options.max_subcompactions = max_subcompactions_;
options.statistics = rocksdb::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, "p1", "p9");
ASSERT_EQ("0,0,1", FilesPerLevel(1));
// Populate a different range
MakeTables(3, "c", "e", 1);
ASSERT_EQ("1,1,2", FilesPerLevel(1));
// Compact just the new range
Compact(1, "b", "f");
ASSERT_EQ("0,0,2", FilesPerLevel(1));
// Compact all
MakeTables(1, "a", "z", 1);
ASSERT_EQ("1,0,2", FilesPerLevel(1));
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::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, "p1", "p9", 1);
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_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_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::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:Matches",
[&](void* arg) { matches++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:DidntMatch",
[&](void* arg) { didnt_match++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::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::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::SyncPoint::GetInstance()->LoadDependency(
{{"CompactionJob::Run():Start",
"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:1"},
{"DBCompactionTest::SuggestCompactRangeNoTwoLevel0Compactions:2",
"CompactionJob::Run():End"}});
rocksdb::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();
}
TEST_P(DBCompactionTestWithParam, ForceBottommostLevelCompaction) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial_move++; });
rocksdb::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;
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));
// 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::kForce;
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(Key(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(Key(i)), values[i]);
}
rocksdb::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::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompactionBySize:0",
"CompactionJob::Run():Start"}});
rocksdb::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::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::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompactionBySize:0",
"CompactionJob::Run():Start"}});
rocksdb::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::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_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::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::SyncPoint::GetInstance()->LoadDependency(
{{"LevelCompactionPicker::PickCompaction:Return",
"DBCompactionTest::CompactFilesPendingL0Bug:Picked"},
{"DBCompactionTest::CompactFilesPendingL0Bug:ManualCompacted",
"DBImpl::BackgroundCompaction:NonTrivial:AfterRun"}});
rocksdb::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::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;
Reopen(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"));
// 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);
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);
}
}
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(
"TableCache::NewIterator:for_compaction", [&](void* arg) {
bool* use_direct_reads = static_cast<bool*>(arg);
ASSERT_EQ(*use_direct_reads,
options.use_direct_io_for_flush_and_compaction);
});
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, "p1", "p9");
ASSERT_FALSE(readahead ^ options.use_direct_io_for_flush_and_compaction);
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));
#endif // !defined(ROCKSDB_LITE)
} // namespace rocksdb
int main(int argc, char** argv) {
#if !defined(ROCKSDB_LITE)
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
#else
return 0;
#endif
}
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