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db_universal_compaction_test.cc
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <string>
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "rocksdb/utilities/table_properties_collectors.h"
#include "test_util/mock_time_env.h"
#include "test_util/sync_point.h"
#include "test_util/testutil.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
static std::string CompressibleString(Random* rnd, int len) {
std::string r;
test::CompressibleString(rnd, 0.8, len, &r);
return r;
}
class DBTestUniversalCompactionBase
: public DBTestBase,
public ::testing::WithParamInterface<std::tuple<int, bool>> {
public:
explicit DBTestUniversalCompactionBase(const std::string& path)
: DBTestBase(path, /*env_do_fsync=*/false) {}
void SetUp() override {
num_levels_ = std::get<0>(GetParam());
exclusive_manual_compaction_ = std::get<1>(GetParam());
}
int num_levels_;
bool exclusive_manual_compaction_;
};
class DBTestUniversalCompaction : public DBTestUniversalCompactionBase {
public:
DBTestUniversalCompaction()
: DBTestUniversalCompactionBase("/db_universal_compaction_test") {}
};
class DBTestUniversalCompaction2 : public DBTestBase {
public:
DBTestUniversalCompaction2()
: DBTestBase("db_universal_compaction_test2", /*env_do_fsync=*/false) {}
};
namespace {
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
}
class KeepFilter : public CompactionFilter {
public:
bool Filter(int /*level*/, const Slice& /*key*/, const Slice& /*value*/,
std::string* /*new_value*/,
bool* /*value_changed*/) const override {
return false;
}
const char* Name() const override { return "KeepFilter"; }
};
class KeepFilterFactory : public CompactionFilterFactory {
public:
explicit KeepFilterFactory(bool check_context = false)
: check_context_(check_context) {}
std::unique_ptr<CompactionFilter> CreateCompactionFilter(
const CompactionFilter::Context& context) override {
if (check_context_) {
EXPECT_EQ(expect_full_compaction_.load(), context.is_full_compaction);
EXPECT_EQ(expect_manual_compaction_.load(), context.is_manual_compaction);
}
return std::unique_ptr<CompactionFilter>(new KeepFilter());
}
const char* Name() const override { return "KeepFilterFactory"; }
bool check_context_;
std::atomic_bool expect_full_compaction_;
std::atomic_bool expect_manual_compaction_;
};
} // anonymous namespace
// Make sure we don't trigger a problem if the trigger condtion is given
// to be 0, which is invalid.
TEST_P(DBTestUniversalCompaction, UniversalCompactionSingleSortedRun) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = num_levels_;
// Config universal compaction to always compact to one single sorted run.
options.level0_file_num_compaction_trigger = 0;
options.compaction_options_universal.size_ratio = 10;
options.compaction_options_universal.min_merge_width = 2;
options.compaction_options_universal.max_size_amplification_percent = 0;
options.write_buffer_size = 105 << 10; // 105KB
options.arena_block_size = 4 << 10;
options.target_file_size_base = 32 << 10; // 32KB
// trigger compaction if there are >= 4 files
KeepFilterFactory* filter = new KeepFilterFactory(true);
filter->expect_manual_compaction_.store(false);
options.compaction_filter_factory.reset(filter);
DestroyAndReopen(options);
ASSERT_EQ(1, db_->GetOptions().level0_file_num_compaction_trigger);
Random rnd(301);
int key_idx = 0;
filter->expect_full_compaction_.store(true);
for (int num = 0; num < 16; num++) {
// Write 100KB file. And immediately it should be compacted to one file.
GenerateNewFile(&rnd, &key_idx);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ(NumSortedRuns(0), 1);
}
ASSERT_OK(Put(Key(key_idx), ""));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ(NumSortedRuns(0), 1);
}
TEST_P(DBTestUniversalCompaction, OptimizeFiltersForHits) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.compaction_options_universal.size_ratio = 5;
options.num_levels = num_levels_;
options.write_buffer_size = 105 << 10; // 105KB
options.arena_block_size = 4 << 10;
options.target_file_size_base = 32 << 10; // 32KB
// trigger compaction if there are >= 4 files
options.level0_file_num_compaction_trigger = 4;
BlockBasedTableOptions bbto;
bbto.cache_index_and_filter_blocks = true;
bbto.filter_policy.reset(NewBloomFilterPolicy(10, false));
bbto.whole_key_filtering = true;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
options.optimize_filters_for_hits = true;
options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
options.memtable_factory.reset(test::NewSpecialSkipListFactory(3));
DestroyAndReopen(options);
// block compaction from happening
env_->SetBackgroundThreads(1, Env::LOW);
test::SleepingBackgroundTask sleeping_task_low;
env_->Schedule(&test::SleepingBackgroundTask::DoSleepTask, &sleeping_task_low,
Env::Priority::LOW);
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
ASSERT_OK(Put(Key(num * 10), "val"));
if (num) {
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
}
ASSERT_OK(Put(Key(30 + num * 10), "val"));
ASSERT_OK(Put(Key(60 + num * 10), "val"));
}
ASSERT_OK(Put("", ""));
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
// Query set of non existing keys
for (int i = 5; i < 90; i += 10) {
ASSERT_EQ(Get(Key(i)), "NOT_FOUND");
}
// Make sure bloom filter is used at least once.
ASSERT_GT(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
auto prev_counter = TestGetTickerCount(options, BLOOM_FILTER_USEFUL);
// Make sure bloom filter is used for all but the last L0 file when looking
// up a non-existent key that's in the range of all L0 files.
ASSERT_EQ(Get(Key(35)), "NOT_FOUND");
ASSERT_EQ(prev_counter + NumTableFilesAtLevel(0) - 1,
TestGetTickerCount(options, BLOOM_FILTER_USEFUL));
prev_counter = TestGetTickerCount(options, BLOOM_FILTER_USEFUL);
// Unblock compaction and wait it for happening.
sleeping_task_low.WakeUp();
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// The same queries will not trigger bloom filter
for (int i = 5; i < 90; i += 10) {
ASSERT_EQ(Get(Key(i)), "NOT_FOUND");
}
ASSERT_EQ(prev_counter, TestGetTickerCount(options, BLOOM_FILTER_USEFUL));
}
// TODO(kailiu) The tests on UniversalCompaction has some issues:
// 1. A lot of magic numbers ("11" or "12").
// 2. Made assumption on the memtable flush conditions, which may change from
// time to time.
TEST_P(DBTestUniversalCompaction, UniversalCompactionTrigger) {
Options options;
options.compaction_style = kCompactionStyleUniversal;
options.compaction_options_universal.size_ratio = 5;
options.num_levels = num_levels_;
options.write_buffer_size = 105 << 10; // 105KB
options.arena_block_size = 4 << 10;
// trigger compaction if there are >= 4 files
options.level0_file_num_compaction_trigger = 4;
KeepFilterFactory* filter = new KeepFilterFactory(true);
filter->expect_manual_compaction_.store(false);
options.compaction_filter_factory.reset(filter);
options = CurrentOptions(options);
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBTestWritableFile.GetPreallocationStatus", [&](void* arg) {
ASSERT_TRUE(arg != nullptr);
size_t preallocation_size = *(static_cast<size_t*>(arg));
if (num_levels_ > 3) {
ASSERT_LE(preallocation_size, options.target_file_size_base * 1.1);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
int key_idx = 0;
filter->expect_full_compaction_.store(true);
// Stage 1:
// Generate a set of files at level 0, but don't trigger level-0
// compaction.
for (int num = 0; num < options.level0_file_num_compaction_trigger - 1;
num++) {
// Write 100KB
GenerateNewFile(1, &rnd, &key_idx);
}
// Generate one more file at level-0, which should trigger level-0
// compaction.
GenerateNewFile(1, &rnd, &key_idx);
// Suppose each file flushed from mem table has size 1. Now we compact
// (level0_file_num_compaction_trigger+1)=4 files and should have a big
// file of size 4.
ASSERT_EQ(NumSortedRuns(1), 1);
// Stage 2:
// Now we have one file at level 0, with size 4. We also have some data in
// mem table. Let's continue generating new files at level 0, but don't
// trigger level-0 compaction.
// First, clean up memtable before inserting new data. This will generate
// a level-0 file, with size around 0.4 (according to previously written
// data amount).
filter->expect_full_compaction_.store(false);
ASSERT_OK(Flush(1));
for (int num = 0; num < options.level0_file_num_compaction_trigger - 3;
num++) {
GenerateNewFile(1, &rnd, &key_idx);
ASSERT_EQ(NumSortedRuns(1), num + 3);
}
// Generate one more file at level-0, which should trigger level-0
// compaction.
GenerateNewFile(1, &rnd, &key_idx);
// Before compaction, we have 4 files at level 0, with size 4, 0.4, 1, 1.
// After compaction, we should have 2 files, with size 4, 2.4.
ASSERT_EQ(NumSortedRuns(1), 2);
// Stage 3:
// Now we have 2 files at level 0, with size 4 and 2.4. Continue
// generating new files at level 0.
for (int num = 0; num < options.level0_file_num_compaction_trigger - 3;
num++) {
GenerateNewFile(1, &rnd, &key_idx);
ASSERT_EQ(NumSortedRuns(1), num + 3);
}
// Generate one more file at level-0, which should trigger level-0
// compaction.
GenerateNewFile(1, &rnd, &key_idx);
// Before compaction, we have 4 files at level 0, with size 4, 2.4, 1, 1.
// After compaction, we should have 3 files, with size 4, 2.4, 2.
ASSERT_EQ(NumSortedRuns(1), 3);
// Stage 4:
// Now we have 3 files at level 0, with size 4, 2.4, 2. Let's generate a
// new file of size 1.
GenerateNewFile(1, &rnd, &key_idx);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Level-0 compaction is triggered, but no file will be picked up.
ASSERT_EQ(NumSortedRuns(1), 4);
// Stage 5:
// Now we have 4 files at level 0, with size 4, 2.4, 2, 1. Let's generate
// a new file of size 1.
filter->expect_full_compaction_.store(true);
GenerateNewFile(1, &rnd, &key_idx);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// All files at level 0 will be compacted into a single one.
ASSERT_EQ(NumSortedRuns(1), 1);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBTestUniversalCompaction, UniversalCompactionSizeAmplification) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = num_levels_;
options.write_buffer_size = 100 << 10; // 100KB
options.target_file_size_base = 32 << 10; // 32KB
options.level0_file_num_compaction_trigger = 3;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
// Trigger compaction if size amplification exceeds 110%
options.compaction_options_universal.max_size_amplification_percent = 110;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
Random rnd(301);
int key_idx = 0;
// Generate two files in Level 0. Both files are approx the same size.
for (int num = 0; num < options.level0_file_num_compaction_trigger - 1;
num++) {
// Write 110KB (11 values, each 10K)
for (int i = 0; i < 11; i++) {
ASSERT_OK(Put(1, Key(key_idx), rnd.RandomString(10000)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
ASSERT_EQ(NumSortedRuns(1), num + 1);
}
ASSERT_EQ(NumSortedRuns(1), 2);
// Flush whatever is remaining in memtable. This is typically
// small, which should not trigger size ratio based compaction
// but will instead trigger size amplification.
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Verify that size amplification did occur
ASSERT_EQ(NumSortedRuns(1), 1);
}
TEST_P(DBTestUniversalCompaction, DynamicUniversalCompactionSizeAmplification) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 1;
options.write_buffer_size = 100 << 10; // 100KB
options.target_file_size_base = 32 << 10; // 32KB
options.level0_file_num_compaction_trigger = 3;
// Initial setup of compaction_options_universal will prevent universal
// compaction from happening
options.compaction_options_universal.size_ratio = 100;
options.compaction_options_universal.min_merge_width = 100;
DestroyAndReopen(options);
int total_picked_compactions = 0;
int total_size_amp_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"UniversalCompactionBuilder::PickCompaction:Return", [&](void* arg) {
if (arg) {
total_picked_compactions++;
Compaction* c = static_cast<Compaction*>(arg);
if (c->compaction_reason() ==
CompactionReason::kUniversalSizeAmplification) {
total_size_amp_compactions++;
}
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
MutableCFOptions mutable_cf_options;
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
int key_idx = 0;
// Generate two files in Level 0. Both files are approx the same size.
for (int num = 0; num < options.level0_file_num_compaction_trigger - 1;
num++) {
// Write 110KB (11 values, each 10K)
for (int i = 0; i < 11; i++) {
ASSERT_OK(Put(1, Key(key_idx), rnd.RandomString(10000)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
ASSERT_EQ(NumSortedRuns(1), num + 1);
}
ASSERT_EQ(NumSortedRuns(1), 2);
// Flush whatever is remaining in memtable. This is typically
// small, which should not trigger size ratio based compaction
// but could instead trigger size amplification if it's set
// to 110.
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Verify compaction did not happen
ASSERT_EQ(NumSortedRuns(1), 3);
// Trigger compaction if size amplification exceeds 110% without reopening DB
ASSERT_EQ(dbfull()
->GetOptions(handles_[1])
.compaction_options_universal.max_size_amplification_percent,
200U);
ASSERT_OK(dbfull()->SetOptions(handles_[1],
{{"compaction_options_universal",
"{max_size_amplification_percent=110;}"}}));
ASSERT_EQ(dbfull()
->GetOptions(handles_[1])
.compaction_options_universal.max_size_amplification_percent,
110u);
ASSERT_OK(dbfull()->TEST_GetLatestMutableCFOptions(handles_[1],
&mutable_cf_options));
ASSERT_EQ(110u, mutable_cf_options.compaction_options_universal
.max_size_amplification_percent);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Verify that size amplification did happen
ASSERT_EQ(NumSortedRuns(1), 1);
ASSERT_EQ(total_picked_compactions, 1);
ASSERT_EQ(total_size_amp_compactions, 1);
}
TEST_P(DBTestUniversalCompaction, DynamicUniversalCompactionReadAmplification) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = 1;
options.write_buffer_size = 100 << 10; // 100KB
options.target_file_size_base = 32 << 10; // 32KB
options.level0_file_num_compaction_trigger = 3;
// Initial setup of compaction_options_universal will prevent universal
// compaction from happening
options.compaction_options_universal.max_size_amplification_percent = 2000;
options.compaction_options_universal.size_ratio = 0;
options.compaction_options_universal.min_merge_width = 100;
DestroyAndReopen(options);
int total_picked_compactions = 0;
int total_size_ratio_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"UniversalCompactionBuilder::PickCompaction:Return", [&](void* arg) {
if (arg) {
total_picked_compactions++;
Compaction* c = static_cast<Compaction*>(arg);
if (c->compaction_reason() == CompactionReason::kUniversalSizeRatio) {
total_size_ratio_compactions++;
}
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
MutableCFOptions mutable_cf_options;
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
int key_idx = 0;
// Generate three files in Level 0. All files are approx the same size.
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
// Write 110KB (11 values, each 10K)
for (int i = 0; i < 11; i++) {
ASSERT_OK(Put(1, Key(key_idx), rnd.RandomString(10000)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
ASSERT_EQ(NumSortedRuns(1), num + 1);
}
ASSERT_EQ(NumSortedRuns(1), options.level0_file_num_compaction_trigger);
// Flush whatever is remaining in memtable. This is typically small, about
// 30KB.
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Verify compaction did not happen
ASSERT_EQ(NumSortedRuns(1), options.level0_file_num_compaction_trigger + 1);
ASSERT_EQ(total_picked_compactions, 0);
ASSERT_OK(dbfull()->SetOptions(
handles_[1],
{{"compaction_options_universal",
"{min_merge_width=2;max_merge_width=2;size_ratio=100;}"}}));
ASSERT_EQ(dbfull()
->GetOptions(handles_[1])
.compaction_options_universal.min_merge_width,
2u);
ASSERT_EQ(dbfull()
->GetOptions(handles_[1])
.compaction_options_universal.max_merge_width,
2u);
ASSERT_EQ(
dbfull()->GetOptions(handles_[1]).compaction_options_universal.size_ratio,
100u);
ASSERT_OK(dbfull()->TEST_GetLatestMutableCFOptions(handles_[1],
&mutable_cf_options));
ASSERT_EQ(mutable_cf_options.compaction_options_universal.size_ratio, 100u);
ASSERT_EQ(mutable_cf_options.compaction_options_universal.min_merge_width,
2u);
ASSERT_EQ(mutable_cf_options.compaction_options_universal.max_merge_width,
2u);
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Files in L0 are approx: 0.3 (30KB), 1, 1, 1.
// On compaction: the files are below the size amp threshold, so we
// fallthrough to checking read amp conditions. The configured size ratio is
// not big enough to take 0.3 into consideration. So the next files 1 and 1
// are compacted together first as they satisfy size ratio condition and
// (min_merge_width, max_merge_width) condition, to give out a file size of 2.
// Next, the newly generated 2 and the last file 1 are compacted together. So
// at the end: #sortedRuns = 2, #picked_compactions = 2, and all the picked
// ones are size ratio based compactions.
ASSERT_EQ(NumSortedRuns(1), 2);
// If max_merge_width had not been changed dynamically above, and if it
// continued to be the default value of UINIT_MAX, total_picked_compactions
// would have been 1.
ASSERT_EQ(total_picked_compactions, 2);
ASSERT_EQ(total_size_ratio_compactions, 2);
}
TEST_P(DBTestUniversalCompaction, CompactFilesOnUniversalCompaction) {
const int kTestKeySize = 16;
const int kTestValueSize = 984;
const int kEntrySize = kTestKeySize + kTestValueSize;
const int kEntriesPerBuffer = 10;
ChangeCompactOptions();
Options options;
options.create_if_missing = true;
options.compaction_style = kCompactionStyleLevel;
options.num_levels = 1;
options.target_file_size_base = options.write_buffer_size;
options.compression = kNoCompression;
options = CurrentOptions(options);
options.write_buffer_size = kEntrySize * kEntriesPerBuffer;
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_EQ(options.compaction_style, kCompactionStyleUniversal);
Random rnd(301);
for (int key = 1024 * kEntriesPerBuffer; key >= 0; --key) {
ASSERT_OK(Put(1, std::to_string(key), rnd.RandomString(kTestValueSize)));
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ColumnFamilyMetaData cf_meta;
dbfull()->GetColumnFamilyMetaData(handles_[1], &cf_meta);
std::vector<std::string> compaction_input_file_names;
for (const auto& file : cf_meta.levels[0].files) {
if (rnd.OneIn(2)) {
compaction_input_file_names.push_back(file.name);
}
}
if (compaction_input_file_names.size() == 0) {
compaction_input_file_names.push_back(cf_meta.levels[0].files[0].name);
}
// expect fail since universal compaction only allow L0 output
ASSERT_FALSE(dbfull()
->CompactFiles(CompactionOptions(), handles_[1],
compaction_input_file_names, 1)
.ok());
// expect ok and verify the compacted files no longer exist.
ASSERT_OK(dbfull()->CompactFiles(CompactionOptions(), handles_[1],
compaction_input_file_names, 0));
dbfull()->GetColumnFamilyMetaData(handles_[1], &cf_meta);
VerifyCompactionResult(
cf_meta, std::set<std::string>(compaction_input_file_names.begin(),
compaction_input_file_names.end()));
compaction_input_file_names.clear();
// Pick the first and the last file, expect everything is
// compacted into one single file.
compaction_input_file_names.push_back(cf_meta.levels[0].files[0].name);
compaction_input_file_names.push_back(
cf_meta.levels[0].files[cf_meta.levels[0].files.size() - 1].name);
ASSERT_OK(dbfull()->CompactFiles(CompactionOptions(), handles_[1],
compaction_input_file_names, 0));
dbfull()->GetColumnFamilyMetaData(handles_[1], &cf_meta);
ASSERT_EQ(cf_meta.levels[0].files.size(), 1U);
}
TEST_P(DBTestUniversalCompaction, UniversalCompactionTargetLevel) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.write_buffer_size = 100 << 10; // 100KB
options.num_levels = 7;
options.disable_auto_compactions = true;
DestroyAndReopen(options);
// Generate 3 overlapping files
Random rnd(301);
for (int i = 0; i < 210; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(100)));
}
ASSERT_OK(Flush());
for (int i = 200; i < 300; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(100)));
}
ASSERT_OK(Flush());
for (int i = 250; i < 260; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(100)));
}
ASSERT_OK(Flush());
ASSERT_EQ("3", FilesPerLevel(0));
// Compact all files into 1 file and put it in L4
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 4;
compact_options.exclusive_manual_compaction = exclusive_manual_compaction_;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,0,0,0,1", FilesPerLevel(0));
}
#if !defined(ROCKSDB_VALGRIND_RUN) || defined(ROCKSDB_FULL_VALGRIND_RUN)
class DBTestUniversalCompactionMultiLevels
: public DBTestUniversalCompactionBase {
public:
DBTestUniversalCompactionMultiLevels()
: DBTestUniversalCompactionBase(
"/db_universal_compaction_multi_levels_test") {}
};
TEST_P(DBTestUniversalCompactionMultiLevels, UniversalCompactionMultiLevels) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = num_levels_;
options.write_buffer_size = 100 << 10; // 100KB
options.level0_file_num_compaction_trigger = 8;
options.max_background_compactions = 3;
options.target_file_size_base = 32 * 1024;
CreateAndReopenWithCF({"pikachu"}, options);
// Trigger compaction if size amplification exceeds 110%
options.compaction_options_universal.max_size_amplification_percent = 110;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
Random rnd(301);
int num_keys = 100000;
for (int i = 0; i < num_keys * 2; i++) {
ASSERT_OK(Put(1, Key(i % num_keys), Key(i)));
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
for (int i = num_keys; i < num_keys * 2; i++) {
ASSERT_EQ(Get(1, Key(i % num_keys)), Key(i));
}
}
// Tests universal compaction with trivial move enabled
TEST_P(DBTestUniversalCompactionMultiLevels, UniversalCompactionTrivialMove) {
int32_t trivial_move = 0;
int32_t non_trivial_move = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* /*arg*/) { trivial_move++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial", [&](void* arg) {
non_trivial_move++;
ASSERT_TRUE(arg != nullptr);
int output_level = *(static_cast<int*>(arg));
ASSERT_EQ(output_level, 0);
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.compaction_options_universal.allow_trivial_move = true;
options.num_levels = 3;
options.write_buffer_size = 100 << 10; // 100KB
options.level0_file_num_compaction_trigger = 3;
options.max_background_compactions = 2;
options.target_file_size_base = 32 * 1024;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
// Trigger compaction if size amplification exceeds 110%
options.compaction_options_universal.max_size_amplification_percent = 110;
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
Random rnd(301);
int num_keys = 150000;
for (int i = 0; i < num_keys; i++) {
ASSERT_OK(Put(1, Key(i), Key(i)));
}
std::vector<std::string> values;
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_GT(trivial_move, 0);
ASSERT_GT(non_trivial_move, 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
INSTANTIATE_TEST_CASE_P(MultiLevels, DBTestUniversalCompactionMultiLevels,
::testing::Combine(::testing::Values(3, 20),
::testing::Bool()));
class DBTestUniversalCompactionParallel : public DBTestUniversalCompactionBase {
public:
DBTestUniversalCompactionParallel()
: DBTestUniversalCompactionBase("/db_universal_compaction_prallel_test") {
}
};
TEST_P(DBTestUniversalCompactionParallel, UniversalCompactionParallel) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = num_levels_;
options.env = env_;
options.write_buffer_size = 1 << 10; // 1KB
options.level0_file_num_compaction_trigger = 3;
options.max_background_compactions = 3;
options.max_background_flushes = 3;
options.target_file_size_base = 1 * 1024;
options.compaction_options_universal.max_size_amplification_percent = 110;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
// Delay every compaction so multiple compactions will happen.
std::atomic<int> num_compactions_running(0);
std::atomic<bool> has_parallel(false);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::Run():Start", [&](void* /*arg*/) {
if (num_compactions_running.fetch_add(1) > 0) {
has_parallel.store(true);
return;
}
for (int nwait = 0; nwait < 20000; nwait++) {
if (has_parallel.load() || num_compactions_running.load() > 1) {
has_parallel.store(true);
break;
}
env_->SleepForMicroseconds(1000);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::Run():End",
[&](void* /*arg*/) { num_compactions_running.fetch_add(-1); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
options = CurrentOptions(options);
ReopenWithColumnFamilies({"default", "pikachu"}, options);
Random rnd(301);
int num_keys = 30000;
for (int i = 0; i < num_keys * 2; i++) {
ASSERT_OK(Put(1, Key(i % num_keys), Key(i)));
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_EQ(num_compactions_running.load(), 0);
ASSERT_TRUE(has_parallel.load());
for (int i = num_keys; i < num_keys * 2; i++) {
ASSERT_EQ(Get(1, Key(i % num_keys)), Key(i));
}
// Reopen and check.
ReopenWithColumnFamilies({"default", "pikachu"}, options);
for (int i = num_keys; i < num_keys * 2; i++) {
ASSERT_EQ(Get(1, Key(i % num_keys)), Key(i));
}
}
TEST_P(DBTestUniversalCompactionParallel, PickByFileNumberBug) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.num_levels = num_levels_;
options.write_buffer_size = 1 * 1024; // 1KB
options.level0_file_num_compaction_trigger = 7;
options.max_background_compactions = 2;
options.target_file_size_base = 1024 * 1024; // 1MB
// Disable size amplifiction compaction
options.compaction_options_universal.max_size_amplification_percent =
UINT_MAX;
DestroyAndReopen(options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
{{"DBTestUniversalCompactionParallel::PickByFileNumberBug:0",
"BackgroundCallCompaction:0"},
{"UniversalCompactionBuilder::PickCompaction:Return",
"DBTestUniversalCompactionParallel::PickByFileNumberBug:1"},
{"DBTestUniversalCompactionParallel::PickByFileNumberBug:2",
"CompactionJob::Run():Start"}});
int total_picked_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"UniversalCompactionBuilder::PickCompaction:Return", [&](void* arg) {
if (arg) {
total_picked_compactions++;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Write 7 files to trigger compaction
int key_idx = 1;
for (int i = 1; i <= 70; i++) {
std::string k = Key(key_idx++);
ASSERT_OK(Put(k, k));
if (i % 10 == 0) {
ASSERT_OK(Flush());
}
}
// Wait for the 1st background compaction process to start
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:0");
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:1");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
// Write 3 files while 1st compaction is held
// These 3 files have different sizes to avoid compacting based on size_ratio
int num_keys = 1000;
for (int i = 0; i < 3; i++) {
for (int j = 1; j <= num_keys; j++) {
std::string k = Key(key_idx++);
ASSERT_OK(Put(k, k));
}
ASSERT_OK(Flush());
num_keys -= 100;
}
// Hold the 1st compaction from finishing
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:2");
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// There should only be one picked compaction as the score drops below one
// after the first one is picked.
EXPECT_EQ(total_picked_compactions, 1);
EXPECT_EQ(TotalTableFiles(), 4);
// Stop SyncPoint and destroy the DB and reopen it again
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
key_idx = 1;
total_picked_compactions = 0;
DestroyAndReopen(options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Write 7 files to trigger compaction
for (int i = 1; i <= 70; i++) {
std::string k = Key(key_idx++);
ASSERT_OK(Put(k, k));
if (i % 10 == 0) {
ASSERT_OK(Flush());
}
}
// Wait for the 1st background compaction process to start
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:0");
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:1");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
// Write 8 files while 1st compaction is held
// These 8 files have different sizes to avoid compacting based on size_ratio
num_keys = 1000;
for (int i = 0; i < 8; i++) {
for (int j = 1; j <= num_keys; j++) {
std::string k = Key(key_idx++);
ASSERT_OK(Put(k, k));
}
ASSERT_OK(Flush());
num_keys -= 100;
}
// Wait for the 2nd background compaction process to start
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:0");
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:1");
// Hold the 1st and 2nd compaction from finishing
TEST_SYNC_POINT("DBTestUniversalCompactionParallel::PickByFileNumberBug:2");
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// This time we will trigger a compaction because of size ratio and
// another compaction because of number of files that are not compacted
// greater than 7
EXPECT_GE(total_picked_compactions, 2);
}
INSTANTIATE_TEST_CASE_P(Parallel, DBTestUniversalCompactionParallel,
::testing::Combine(::testing::Values(1, 10),
::testing::Values(false)));
#endif // !defined(ROCKSDB_VALGRIND_RUN) || defined(ROCKSDB_FULL_VALGRIND_RUN)
TEST_P(DBTestUniversalCompaction, UniversalCompactionOptions) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.write_buffer_size = 105 << 10; // 105KB
options.arena_block_size = 4 << 10; // 4KB
options.target_file_size_base = 32 << 10; // 32KB
options.level0_file_num_compaction_trigger = 4;
options.num_levels = num_levels_;
options.compaction_options_universal.compression_size_percent = -1;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
int key_idx = 0;
for (int num = 0; num < options.level0_file_num_compaction_trigger; num++) {
// Write 100KB (100 values, each 1K)
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(1, Key(key_idx), rnd.RandomString(990)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
if (num < options.level0_file_num_compaction_trigger - 1) {
ASSERT_EQ(NumSortedRuns(1), num + 1);
}
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
ASSERT_EQ(NumSortedRuns(1), 1);
}
TEST_P(DBTestUniversalCompaction, UniversalCompactionStopStyleSimilarSize) {
Options options = CurrentOptions();
options.compaction_style = kCompactionStyleUniversal;
options.write_buffer_size = 105 << 10; // 105KB
options.arena_block_size = 4 << 10; // 4KB
options.target_file_size_base = 32 << 10; // 32KB
// trigger compaction if there are >= 4 files
options.level0_file_num_compaction_trigger = 4;
options.compaction_options_universal.size_ratio = 10;
options.compaction_options_universal.stop_style =
kCompactionStopStyleSimilarSize;
options.num_levels = num_levels_;
DestroyAndReopen(options);
Random rnd(301);
int key_idx = 0;
// Stage 1:
// Generate a set of files at level 0, but don't trigger level-0
// compaction.
for (int num = 0; num < options.level0_file_num_compaction_trigger - 1;
num++) {
// Write 100KB (100 values, each 1K)
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(key_idx), rnd.RandomString(990)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
ASSERT_EQ(NumSortedRuns(), num + 1);
}
// Generate one more file at level-0, which should trigger level-0
// compaction.
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(key_idx), rnd.RandomString(990)));
key_idx++;
}
ASSERT_OK(dbfull()->TEST_WaitForCompact());
// Suppose each file flushed from mem table has size 1. Now we compact
// (level0_file_num_compaction_trigger+1)=4 files and should have a big
// file of size 4.
ASSERT_EQ(NumSortedRuns(), 1);
// Stage 2:
// Now we have one file at level 0, with size 4. We also have some data in
// mem table. Let's continue generating new files at level 0, but don't
// trigger level-0 compaction.
// First, clean up memtable before inserting new data. This will generate
// a level-0 file, with size around 0.4 (according to previously written
// data amount).
ASSERT_OK(dbfull()->Flush(FlushOptions()));
for (int num = 0; num < options.level0_file_num_compaction_trigger - 3;
num++) {
// Write 110KB (11 values, each 10K)
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(key_idx), rnd.RandomString(990)));