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compaction_picker_test.cc
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include "db/compaction.h"
#include "db/compaction_picker.h"
#include <limits>
#include <string>
#include <utility>
#include "util/logging.h"
#include "util/string_util.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class CountingLogger : public Logger {
public:
using Logger::Logv;
virtual void Logv(const char* format, va_list ap) override { log_count++; }
size_t log_count;
};
class CompactionPickerTest : public testing::Test {
public:
const Comparator* ucmp_;
InternalKeyComparator icmp_;
Options options_;
ImmutableCFOptions ioptions_;
MutableCFOptions mutable_cf_options_;
LevelCompactionPicker level_compaction_picker;
std::string cf_name_;
CountingLogger logger_;
LogBuffer log_buffer_;
uint32_t file_num_;
CompactionOptionsFIFO fifo_options_;
std::unique_ptr<VersionStorageInfo> vstorage_;
std::vector<std::unique_ptr<FileMetaData>> files_;
// does not own FileMetaData
std::unordered_map<uint32_t, std::pair<FileMetaData*, int>> file_map_;
// input files to compaction process.
std::vector<CompactionInputFiles> input_files_;
int compaction_level_start_;
CompactionPickerTest()
: ucmp_(BytewiseComparator()),
icmp_(ucmp_),
ioptions_(options_),
mutable_cf_options_(options_),
level_compaction_picker(ioptions_, &icmp_),
cf_name_("dummy"),
log_buffer_(InfoLogLevel::INFO_LEVEL, &logger_),
file_num_(1),
vstorage_(nullptr) {
fifo_options_.max_table_files_size = 1;
mutable_cf_options_.RefreshDerivedOptions(ioptions_);
ioptions_.db_paths.emplace_back("dummy",
std::numeric_limits<uint64_t>::max());
}
~CompactionPickerTest() {
}
void NewVersionStorage(int num_levels, CompactionStyle style) {
DeleteVersionStorage();
options_.num_levels = num_levels;
vstorage_.reset(new VersionStorageInfo(&icmp_, ucmp_, options_.num_levels,
style, nullptr, false));
vstorage_->CalculateBaseBytes(ioptions_, mutable_cf_options_);
}
void DeleteVersionStorage() {
vstorage_.reset();
files_.clear();
file_map_.clear();
input_files_.clear();
}
void Add(int level, uint32_t file_number, const char* smallest,
const char* largest, uint64_t file_size = 1, uint32_t path_id = 0,
SequenceNumber smallest_seq = 100,
SequenceNumber largest_seq = 100) {
assert(level < vstorage_->num_levels());
FileMetaData* f = new FileMetaData;
f->fd = FileDescriptor(file_number, path_id, file_size);
f->smallest = InternalKey(smallest, smallest_seq, kTypeValue);
f->largest = InternalKey(largest, largest_seq, kTypeValue);
f->smallest_seqno = smallest_seq;
f->largest_seqno = largest_seq;
f->compensated_file_size = file_size;
f->refs = 0;
vstorage_->AddFile(level, f);
files_.emplace_back(f);
file_map_.insert({file_number, {f, level}});
}
void SetCompactionInputFilesLevels(int level_count, int start_level) {
input_files_.resize(level_count);
for (int i = 0; i < level_count; ++i) {
input_files_[i].level = start_level + i;
}
compaction_level_start_ = start_level;
}
void AddToCompactionFiles(uint32_t file_number) {
auto iter = file_map_.find(file_number);
assert(iter != file_map_.end());
int level = iter->second.second;
assert(level < vstorage_->num_levels());
input_files_[level - compaction_level_start_].files.emplace_back(
iter->second.first);
}
void UpdateVersionStorageInfo() {
vstorage_->CalculateBaseBytes(ioptions_, mutable_cf_options_);
vstorage_->UpdateFilesByCompactionPri(ioptions_.compaction_pri);
vstorage_->UpdateNumNonEmptyLevels();
vstorage_->GenerateFileIndexer();
vstorage_->GenerateLevelFilesBrief();
vstorage_->ComputeCompactionScore(ioptions_, mutable_cf_options_);
vstorage_->GenerateLevel0NonOverlapping();
vstorage_->ComputeFilesMarkedForCompaction();
vstorage_->SetFinalized();
}
};
TEST_F(CompactionPickerTest, Empty) {
NewVersionStorage(6, kCompactionStyleLevel);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() == nullptr);
}
TEST_F(CompactionPickerTest, Single) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
Add(0, 1U, "p", "q");
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() == nullptr);
}
TEST_F(CompactionPickerTest, Level0Trigger) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
Add(0, 1U, "150", "200");
Add(0, 2U, "200", "250");
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, Level1Trigger) {
NewVersionStorage(6, kCompactionStyleLevel);
Add(1, 66U, "150", "200", 1000000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(66U, compaction->input(0, 0)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, Level1Trigger2) {
NewVersionStorage(6, kCompactionStyleLevel);
Add(1, 66U, "150", "200", 1000000001U);
Add(1, 88U, "201", "300", 1000000000U);
Add(2, 6U, "150", "179", 1000000000U);
Add(2, 7U, "180", "220", 1000000000U);
Add(2, 8U, "221", "300", 1000000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(2U, compaction->num_input_files(1));
ASSERT_EQ(66U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(6U, compaction->input(1, 0)->fd.GetNumber());
ASSERT_EQ(7U, compaction->input(1, 1)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, LevelMaxScore) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.target_file_size_base = 10000000;
mutable_cf_options_.target_file_size_multiplier = 10;
mutable_cf_options_.max_bytes_for_level_base = 10 * 1024 * 1024;
Add(0, 1U, "150", "200", 1000000000U);
// Level 1 score 1.2
Add(1, 66U, "150", "200", 6000000U);
Add(1, 88U, "201", "300", 6000000U);
// Level 2 score 1.8. File 7 is the largest. Should be picked
Add(2, 6U, "150", "179", 60000000U);
Add(2, 7U, "180", "220", 60000001U);
Add(2, 8U, "221", "300", 60000000U);
// Level 3 score slightly larger than 1
Add(3, 26U, "150", "170", 260000000U);
Add(3, 27U, "171", "179", 260000000U);
Add(3, 28U, "191", "220", 260000000U);
Add(3, 29U, "221", "300", 260000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(7U, compaction->input(0, 0)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, NeedsCompactionLevel) {
const int kLevels = 6;
const int kFileCount = 20;
for (int level = 0; level < kLevels - 1; ++level) {
NewVersionStorage(kLevels, kCompactionStyleLevel);
uint64_t file_size = vstorage_->MaxBytesForLevel(level) * 2 / kFileCount;
for (int file_count = 1; file_count <= kFileCount; ++file_count) {
// start a brand new version in each test.
NewVersionStorage(kLevels, kCompactionStyleLevel);
for (int i = 0; i < file_count; ++i) {
Add(level, i, ToString((i + 100) * 1000).c_str(),
ToString((i + 100) * 1000 + 999).c_str(),
file_size, 0, i * 100, i * 100 + 99);
}
UpdateVersionStorageInfo();
ASSERT_EQ(vstorage_->CompactionScoreLevel(0), level);
ASSERT_EQ(level_compaction_picker.NeedsCompaction(vstorage_.get()),
vstorage_->CompactionScore(0) >= 1);
// release the version storage
DeleteVersionStorage();
}
}
}
TEST_F(CompactionPickerTest, Level0TriggerDynamic) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200");
Add(0, 2U, "200", "250");
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(1, static_cast<int>(compaction->num_input_levels()));
ASSERT_EQ(num_levels - 1, compaction->output_level());
}
TEST_F(CompactionPickerTest, Level0TriggerDynamic2) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200");
Add(0, 2U, "200", "250");
Add(num_levels - 1, 3U, "200", "250", 300U);
UpdateVersionStorageInfo();
ASSERT_EQ(vstorage_->base_level(), num_levels - 2);
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(1, static_cast<int>(compaction->num_input_levels()));
ASSERT_EQ(num_levels - 2, compaction->output_level());
}
TEST_F(CompactionPickerTest, Level0TriggerDynamic3) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200");
Add(0, 2U, "200", "250");
Add(num_levels - 1, 3U, "200", "250", 300U);
Add(num_levels - 1, 4U, "300", "350", 3000U);
UpdateVersionStorageInfo();
ASSERT_EQ(vstorage_->base_level(), num_levels - 3);
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(1, static_cast<int>(compaction->num_input_levels()));
ASSERT_EQ(num_levels - 3, compaction->output_level());
}
TEST_F(CompactionPickerTest, Level0TriggerDynamic4) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200");
Add(0, 2U, "200", "250");
Add(num_levels - 1, 3U, "200", "250", 300U);
Add(num_levels - 1, 4U, "300", "350", 3000U);
Add(num_levels - 3, 5U, "150", "180", 3U);
Add(num_levels - 3, 6U, "181", "300", 3U);
Add(num_levels - 3, 7U, "400", "450", 3U);
UpdateVersionStorageInfo();
ASSERT_EQ(vstorage_->base_level(), num_levels - 3);
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(2U, compaction->num_input_files(1));
ASSERT_EQ(num_levels - 3, compaction->level(1));
ASSERT_EQ(5U, compaction->input(1, 0)->fd.GetNumber());
ASSERT_EQ(6U, compaction->input(1, 1)->fd.GetNumber());
ASSERT_EQ(2, static_cast<int>(compaction->num_input_levels()));
ASSERT_EQ(num_levels - 3, compaction->output_level());
}
TEST_F(CompactionPickerTest, LevelTriggerDynamic4) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
ioptions_.compaction_pri = kMinOverlappingRatio;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200");
Add(num_levels - 1, 3U, "200", "250", 300U);
Add(num_levels - 1, 4U, "300", "350", 3000U);
Add(num_levels - 1, 4U, "400", "450", 3U);
Add(num_levels - 2, 5U, "150", "180", 300U);
Add(num_levels - 2, 6U, "181", "350", 500U);
Add(num_levels - 2, 7U, "400", "450", 200U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(5U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(0, compaction->num_input_files(1));
ASSERT_EQ(1U, compaction->num_input_levels());
ASSERT_EQ(num_levels - 1, compaction->output_level());
}
// Universal and FIFO Compactions are not supported in ROCKSDB_LITE
#ifndef ROCKSDB_LITE
TEST_F(CompactionPickerTest, NeedsCompactionUniversal) {
NewVersionStorage(1, kCompactionStyleUniversal);
UniversalCompactionPicker universal_compaction_picker(
ioptions_, &icmp_);
// must return false when there's no files.
ASSERT_EQ(universal_compaction_picker.NeedsCompaction(vstorage_.get()),
false);
UpdateVersionStorageInfo();
// verify the trigger given different number of L0 files.
for (int i = 1;
i <= mutable_cf_options_.level0_file_num_compaction_trigger * 2; ++i) {
NewVersionStorage(1, kCompactionStyleUniversal);
Add(0, i, ToString((i + 100) * 1000).c_str(),
ToString((i + 100) * 1000 + 999).c_str(), 1000000, 0, i * 100,
i * 100 + 99);
UpdateVersionStorageInfo();
ASSERT_EQ(level_compaction_picker.NeedsCompaction(vstorage_.get()),
vstorage_->CompactionScore(0) >= 1);
}
}
// Tests if the files can be trivially moved in multi level
// universal compaction when allow_trivial_move option is set
// In this test as the input files overlaps, they cannot
// be trivially moved.
TEST_F(CompactionPickerTest, CannotTrivialMoveUniversal) {
const uint64_t kFileSize = 100000;
ioptions_.compaction_options_universal.allow_trivial_move = true;
NewVersionStorage(1, kCompactionStyleUniversal);
UniversalCompactionPicker universal_compaction_picker(ioptions_, &icmp_);
// must return false when there's no files.
ASSERT_EQ(universal_compaction_picker.NeedsCompaction(vstorage_.get()),
false);
NewVersionStorage(3, kCompactionStyleUniversal);
Add(0, 1U, "150", "200", kFileSize, 0, 500, 550);
Add(0, 2U, "201", "250", kFileSize, 0, 401, 450);
Add(0, 4U, "260", "300", kFileSize, 0, 260, 300);
Add(1, 5U, "100", "151", kFileSize, 0, 200, 251);
Add(1, 3U, "301", "350", kFileSize, 0, 101, 150);
Add(2, 6U, "120", "200", kFileSize, 0, 20, 100);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(
universal_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(!compaction->is_trivial_move());
}
// Tests if the files can be trivially moved in multi level
// universal compaction when allow_trivial_move option is set
// In this test as the input files doesn't overlaps, they should
// be trivially moved.
TEST_F(CompactionPickerTest, AllowsTrivialMoveUniversal) {
const uint64_t kFileSize = 100000;
ioptions_.compaction_options_universal.allow_trivial_move = true;
UniversalCompactionPicker universal_compaction_picker(ioptions_, &icmp_);
NewVersionStorage(3, kCompactionStyleUniversal);
Add(0, 1U, "150", "200", kFileSize, 0, 500, 550);
Add(0, 2U, "201", "250", kFileSize, 0, 401, 450);
Add(0, 4U, "260", "300", kFileSize, 0, 260, 300);
Add(1, 5U, "010", "080", kFileSize, 0, 200, 251);
Add(2, 3U, "301", "350", kFileSize, 0, 101, 150);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(
universal_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction->is_trivial_move());
}
TEST_F(CompactionPickerTest, NeedsCompactionFIFO) {
NewVersionStorage(1, kCompactionStyleFIFO);
const int kFileCount =
mutable_cf_options_.level0_file_num_compaction_trigger * 3;
const uint64_t kFileSize = 100000;
const uint64_t kMaxSize = kFileSize * kFileCount / 2;
fifo_options_.max_table_files_size = kMaxSize;
ioptions_.compaction_options_fifo = fifo_options_;
FIFOCompactionPicker fifo_compaction_picker(ioptions_, &icmp_);
UpdateVersionStorageInfo();
// must return false when there's no files.
ASSERT_EQ(fifo_compaction_picker.NeedsCompaction(vstorage_.get()), false);
// verify whether compaction is needed based on the current
// size of L0 files.
uint64_t current_size = 0;
for (int i = 1; i <= kFileCount; ++i) {
NewVersionStorage(1, kCompactionStyleFIFO);
Add(0, i, ToString((i + 100) * 1000).c_str(),
ToString((i + 100) * 1000 + 999).c_str(),
kFileSize, 0, i * 100, i * 100 + 99);
current_size += kFileSize;
UpdateVersionStorageInfo();
ASSERT_EQ(level_compaction_picker.NeedsCompaction(vstorage_.get()),
vstorage_->CompactionScore(0) >= 1);
}
}
#endif // ROCKSDB_LITE
TEST_F(CompactionPickerTest, CompactionPriMinOverlapping1) {
NewVersionStorage(6, kCompactionStyleLevel);
ioptions_.compaction_pri = kMinOverlappingRatio;
mutable_cf_options_.target_file_size_base = 10000000;
mutable_cf_options_.target_file_size_multiplier = 10;
mutable_cf_options_.max_bytes_for_level_base = 10 * 1024 * 1024;
Add(2, 6U, "150", "179", 50000000U);
Add(2, 7U, "180", "220", 50000000U);
Add(2, 8U, "321", "400", 50000000U); // File not overlapping
Add(2, 9U, "721", "800", 50000000U);
Add(3, 26U, "150", "170", 260000000U);
Add(3, 27U, "171", "179", 260000000U);
Add(3, 28U, "191", "220", 260000000U);
Add(3, 29U, "221", "300", 260000000U);
Add(3, 30U, "750", "900", 260000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
// Pick file 8 because it overlaps with 0 files on level 3.
ASSERT_EQ(8U, compaction->input(0, 0)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, CompactionPriMinOverlapping2) {
NewVersionStorage(6, kCompactionStyleLevel);
ioptions_.compaction_pri = kMinOverlappingRatio;
mutable_cf_options_.target_file_size_base = 10000000;
mutable_cf_options_.target_file_size_multiplier = 10;
mutable_cf_options_.max_bytes_for_level_base = 10 * 1024 * 1024;
Add(2, 6U, "150", "175",
60000000U); // Overlaps with file 26, 27, total size 521M
Add(2, 7U, "176", "200", 60000000U); // Overlaps with file 27, 28, total size
// 520M, the smalelst overlapping
Add(2, 8U, "201", "300",
60000000U); // Overlaps with file 28, 29, total size 521M
Add(3, 26U, "100", "110", 261000000U);
Add(3, 26U, "150", "170", 261000000U);
Add(3, 27U, "171", "179", 260000000U);
Add(3, 28U, "191", "220", 260000000U);
Add(3, 29U, "221", "300", 261000000U);
Add(3, 30U, "321", "400", 261000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
// Picking file 7 because overlapping ratio is the biggest.
ASSERT_EQ(7U, compaction->input(0, 0)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, CompactionPriMinOverlapping3) {
NewVersionStorage(6, kCompactionStyleLevel);
ioptions_.compaction_pri = kMinOverlappingRatio;
mutable_cf_options_.max_bytes_for_level_base = 10000000;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
// file 7 and 8 over lap with the same file, but file 8 is smaller so
// it will be picked.
Add(2, 6U, "150", "167", 60000000U); // Overlaps with file 26, 27
Add(2, 7U, "168", "169", 60000000U); // Overlaps with file 27
Add(2, 8U, "201", "300", 61000000U); // Overlaps with file 28, but the file
// itself is larger. Should be picked.
Add(3, 26U, "160", "165", 260000000U);
Add(3, 27U, "166", "170", 260000000U);
Add(3, 28U, "180", "400", 260000000U);
Add(3, 29U, "401", "500", 260000000U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_files(0));
// Picking file 8 because overlapping ratio is the biggest.
ASSERT_EQ(8U, compaction->input(0, 0)->fd.GetNumber());
}
// This test exhibits the bug where we don't properly reset parent_index in
// PickCompaction()
TEST_F(CompactionPickerTest, ParentIndexResetBug) {
int num_levels = ioptions_.num_levels;
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 200;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200"); // <- marked for compaction
Add(1, 3U, "400", "500", 600); // <- this one needs compacting
Add(2, 4U, "150", "200");
Add(2, 5U, "201", "210");
Add(2, 6U, "300", "310");
Add(2, 7U, "400", "500"); // <- being compacted
vstorage_->LevelFiles(2)[3]->being_compacted = true;
vstorage_->LevelFiles(0)[0]->marked_for_compaction = true;
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
}
// This test checks ExpandWhileOverlapping() by having overlapping user keys
// ranges (with different sequence numbers) in the input files.
TEST_F(CompactionPickerTest, OverlappingUserKeys) {
NewVersionStorage(6, kCompactionStyleLevel);
ioptions_.compaction_pri = kByCompensatedSize;
Add(1, 1U, "100", "150", 1U);
// Overlapping user keys
Add(1, 2U, "200", "400", 1U);
Add(1, 3U, "400", "500", 1000000000U, 0, 0);
Add(2, 4U, "600", "700", 1U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(1U, compaction->num_input_levels());
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(2U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(3U, compaction->input(0, 1)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, OverlappingUserKeys2) {
NewVersionStorage(6, kCompactionStyleLevel);
// Overlapping user keys on same level and output level
Add(1, 1U, "200", "400", 1000000000U);
Add(1, 2U, "400", "500", 1U, 0, 0);
Add(2, 3U, "000", "100", 1U);
Add(2, 4U, "100", "600", 1U, 0, 0);
Add(2, 5U, "600", "700", 1U, 0, 0);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_levels());
ASSERT_EQ(2U, compaction->num_input_files(0));
ASSERT_EQ(3U, compaction->num_input_files(1));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(3U, compaction->input(1, 0)->fd.GetNumber());
ASSERT_EQ(4U, compaction->input(1, 1)->fd.GetNumber());
ASSERT_EQ(5U, compaction->input(1, 2)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, OverlappingUserKeys3) {
NewVersionStorage(6, kCompactionStyleLevel);
// Chain of overlapping user key ranges (forces ExpandWhileOverlapping() to
// expand multiple times)
Add(1, 1U, "100", "150", 1U);
Add(1, 2U, "150", "200", 1U, 0, 0);
Add(1, 3U, "200", "250", 1000000000U, 0, 0);
Add(1, 4U, "250", "300", 1U, 0, 0);
Add(1, 5U, "300", "350", 1U, 0, 0);
// Output level overlaps with the beginning and the end of the chain
Add(2, 6U, "050", "100", 1U);
Add(2, 7U, "350", "400", 1U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_levels());
ASSERT_EQ(5U, compaction->num_input_files(0));
ASSERT_EQ(2U, compaction->num_input_files(1));
ASSERT_EQ(1U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(2U, compaction->input(0, 1)->fd.GetNumber());
ASSERT_EQ(3U, compaction->input(0, 2)->fd.GetNumber());
ASSERT_EQ(4U, compaction->input(0, 3)->fd.GetNumber());
ASSERT_EQ(5U, compaction->input(0, 4)->fd.GetNumber());
ASSERT_EQ(6U, compaction->input(1, 0)->fd.GetNumber());
ASSERT_EQ(7U, compaction->input(1, 1)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, OverlappingUserKeys4) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.max_bytes_for_level_base = 1000000;
Add(1, 1U, "100", "150", 1U);
Add(1, 2U, "150", "199", 1U, 0, 0);
Add(1, 3U, "200", "250", 1100000U, 0, 0);
Add(1, 4U, "251", "300", 1U, 0, 0);
Add(1, 5U, "300", "350", 1U, 0, 0);
Add(2, 6U, "100", "115", 1U);
Add(2, 7U, "125", "325", 1U);
Add(2, 8U, "350", "400", 1U);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_levels());
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(1U, compaction->num_input_files(1));
ASSERT_EQ(3U, compaction->input(0, 0)->fd.GetNumber());
ASSERT_EQ(7U, compaction->input(1, 0)->fd.GetNumber());
}
TEST_F(CompactionPickerTest, OverlappingUserKeys5) {
NewVersionStorage(6, kCompactionStyleLevel);
// Overlapping user keys on same level and output level
Add(1, 1U, "200", "400", 1000000000U);
Add(1, 2U, "400", "500", 1U, 0, 0);
Add(2, 3U, "000", "100", 1U);
Add(2, 4U, "100", "600", 1U, 0, 0);
Add(2, 5U, "600", "700", 1U, 0, 0);
vstorage_->LevelFiles(2)[2]->being_compacted = true;
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() == nullptr);
}
TEST_F(CompactionPickerTest, OverlappingUserKeys6) {
NewVersionStorage(6, kCompactionStyleLevel);
// Overlapping user keys on same level and output level
Add(1, 1U, "200", "400", 1U, 0, 0);
Add(1, 2U, "401", "500", 1U, 0, 0);
Add(2, 3U, "000", "100", 1U);
Add(2, 4U, "100", "300", 1U, 0, 0);
Add(2, 5U, "305", "450", 1U, 0, 0);
Add(2, 6U, "460", "600", 1U, 0, 0);
Add(2, 7U, "600", "700", 1U, 0, 0);
vstorage_->LevelFiles(1)[0]->marked_for_compaction = true;
vstorage_->LevelFiles(1)[1]->marked_for_compaction = true;
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_levels());
ASSERT_EQ(1U, compaction->num_input_files(0));
ASSERT_EQ(3U, compaction->num_input_files(1));
}
TEST_F(CompactionPickerTest, OverlappingUserKeys7) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.max_compaction_bytes = 100000000000u;
// Overlapping user keys on same level and output level
Add(1, 1U, "200", "400", 1U, 0, 0);
Add(1, 2U, "401", "500", 1000000000U, 0, 0);
Add(2, 3U, "100", "250", 1U);
Add(2, 4U, "300", "600", 1U, 0, 0);
Add(2, 5U, "600", "800", 1U, 0, 0);
UpdateVersionStorageInfo();
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
ASSERT_EQ(2U, compaction->num_input_levels());
ASSERT_GE(1U, compaction->num_input_files(0));
ASSERT_GE(2U, compaction->num_input_files(1));
// File 5 has to be included in the compaction
ASSERT_EQ(5U, compaction->inputs(1)->back()->fd.GetNumber());
}
TEST_F(CompactionPickerTest, NotScheduleL1IfL0WithHigherPri1) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 900000000U;
// 6 L0 files, score 3.
Add(0, 1U, "000", "400", 1U);
Add(0, 2U, "001", "400", 1U, 0, 0);
Add(0, 3U, "001", "400", 1000000000U, 0, 0);
Add(0, 31U, "001", "400", 1000000000U, 0, 0);
Add(0, 32U, "001", "400", 1000000000U, 0, 0);
Add(0, 33U, "001", "400", 1000000000U, 0, 0);
// L1 total size 2GB, score 2.2. If one file being comapcted, score 1.1.
Add(1, 4U, "050", "300", 1000000000U, 0, 0);
file_map_[4u].first->being_compacted = true;
Add(1, 5U, "301", "350", 1000000000U, 0, 0);
// Output level overlaps with the beginning and the end of the chain
Add(2, 6U, "050", "100", 1U);
Add(2, 7U, "300", "400", 1U);
// No compaction should be scheduled, if L0 has higher priority than L1
// but L0->L1 compaction is blocked by a file in L1 being compacted.
UpdateVersionStorageInfo();
ASSERT_EQ(0, vstorage_->CompactionScoreLevel(0));
ASSERT_EQ(1, vstorage_->CompactionScoreLevel(1));
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() == nullptr);
}
TEST_F(CompactionPickerTest, NotScheduleL1IfL0WithHigherPri2) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 900000000U;
// 6 L0 files, score 3.
Add(0, 1U, "000", "400", 1U);
Add(0, 2U, "001", "400", 1U, 0, 0);
Add(0, 3U, "001", "400", 1000000000U, 0, 0);
Add(0, 31U, "001", "400", 1000000000U, 0, 0);
Add(0, 32U, "001", "400", 1000000000U, 0, 0);
Add(0, 33U, "001", "400", 1000000000U, 0, 0);
// L1 total size 2GB, score 2.2. If one file being comapcted, score 1.1.
Add(1, 4U, "050", "300", 1000000000U, 0, 0);
Add(1, 5U, "301", "350", 1000000000U, 0, 0);
// Output level overlaps with the beginning and the end of the chain
Add(2, 6U, "050", "100", 1U);
Add(2, 7U, "300", "400", 1U);
// If no file in L1 being compacted, L0->L1 compaction will be scheduled.
UpdateVersionStorageInfo(); // being_compacted flag is cleared here.
ASSERT_EQ(0, vstorage_->CompactionScoreLevel(0));
ASSERT_EQ(1, vstorage_->CompactionScoreLevel(1));
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
}
TEST_F(CompactionPickerTest, NotScheduleL1IfL0WithHigherPri3) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.level0_file_num_compaction_trigger = 2;
mutable_cf_options_.max_bytes_for_level_base = 900000000U;
// 6 L0 files, score 3.
Add(0, 1U, "000", "400", 1U);
Add(0, 2U, "001", "400", 1U, 0, 0);
Add(0, 3U, "001", "400", 1000000000U, 0, 0);
Add(0, 31U, "001", "400", 1000000000U, 0, 0);
Add(0, 32U, "001", "400", 1000000000U, 0, 0);
Add(0, 33U, "001", "400", 1000000000U, 0, 0);
// L1 score more than 6.
Add(1, 4U, "050", "300", 1000000000U, 0, 0);
file_map_[4u].first->being_compacted = true;
Add(1, 5U, "301", "350", 1000000000U, 0, 0);
Add(1, 51U, "351", "400", 6000000000U, 0, 0);
// Output level overlaps with the beginning and the end of the chain
Add(2, 6U, "050", "100", 1U);
Add(2, 7U, "300", "400", 1U);
// If score in L1 is larger than L0, L1 compaction goes through despite
// there is pending L0 compaction.
UpdateVersionStorageInfo();
ASSERT_EQ(1, vstorage_->CompactionScoreLevel(0));
ASSERT_EQ(0, vstorage_->CompactionScoreLevel(1));
std::unique_ptr<Compaction> compaction(level_compaction_picker.PickCompaction(
cf_name_, mutable_cf_options_, vstorage_.get(), &log_buffer_));
ASSERT_TRUE(compaction.get() != nullptr);
}
TEST_F(CompactionPickerTest, EstimateCompactionBytesNeeded1) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = false;
mutable_cf_options_.level0_file_num_compaction_trigger = 3;
mutable_cf_options_.max_bytes_for_level_base = 1000;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200", 200);
Add(0, 2U, "150", "200", 200);
Add(0, 3U, "150", "200", 200);
// Level 1 is over target by 200
Add(1, 4U, "400", "500", 600);
Add(1, 5U, "600", "700", 600);
// Level 2 is less than target 10000 even added size of level 1
// Size ratio of L2/L1 is 9600 / 1200 = 8
Add(2, 6U, "150", "200", 2500);
Add(2, 7U, "201", "210", 2000);
Add(2, 8U, "300", "310", 2600);
Add(2, 9U, "400", "500", 2500);
// Level 3 exceeds target 100,000 of 1000
Add(3, 10U, "400", "500", 101000);
// Level 4 exceeds target 1,000,000 by 900 after adding size from level 3
// Size ratio L4/L3 is 9.9
// After merge from L3, L4 size is 1000900
Add(4, 11U, "400", "500", 999900);
Add(5, 11U, "400", "500", 8007200);
UpdateVersionStorageInfo();
ASSERT_EQ(200u * 9u + 10900u + 900u * 9,
vstorage_->estimated_compaction_needed_bytes());
}
TEST_F(CompactionPickerTest, EstimateCompactionBytesNeeded2) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = false;
mutable_cf_options_.level0_file_num_compaction_trigger = 3;
mutable_cf_options_.max_bytes_for_level_base = 1000;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200", 200);
Add(0, 2U, "150", "200", 200);
Add(0, 4U, "150", "200", 200);
Add(0, 5U, "150", "200", 200);
Add(0, 6U, "150", "200", 200);
// Level 1 size will be 1400 after merging with L0
Add(1, 7U, "400", "500", 200);
Add(1, 8U, "600", "700", 200);
// Level 2 is less than target 10000 even added size of level 1
Add(2, 9U, "150", "200", 9100);
// Level 3 over the target, but since level 4 is empty, we assume it will be
// a trivial move.
Add(3, 10U, "400", "500", 101000);
UpdateVersionStorageInfo();
// estimated L1->L2 merge: 400 * (9100.0 / 1400.0 + 1.0)
ASSERT_EQ(1400u + 3000u, vstorage_->estimated_compaction_needed_bytes());
}
TEST_F(CompactionPickerTest, EstimateCompactionBytesNeeded3) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = false;
mutable_cf_options_.level0_file_num_compaction_trigger = 3;
mutable_cf_options_.max_bytes_for_level_base = 1000;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
Add(0, 1U, "150", "200", 2000);
Add(0, 2U, "150", "200", 2000);
Add(0, 4U, "150", "200", 2000);
Add(0, 5U, "150", "200", 2000);
Add(0, 6U, "150", "200", 1000);
// Level 1 size will be 10000 after merging with L0
Add(1, 7U, "400", "500", 500);
Add(1, 8U, "600", "700", 500);
Add(2, 9U, "150", "200", 10000);
UpdateVersionStorageInfo();
ASSERT_EQ(10000u + 18000u, vstorage_->estimated_compaction_needed_bytes());
}
TEST_F(CompactionPickerTest, EstimateCompactionBytesNeededDynamicLevel) {
int num_levels = ioptions_.num_levels;
ioptions_.level_compaction_dynamic_level_bytes = true;
mutable_cf_options_.level0_file_num_compaction_trigger = 3;
mutable_cf_options_.max_bytes_for_level_base = 1000;
mutable_cf_options_.max_bytes_for_level_multiplier = 10;
NewVersionStorage(num_levels, kCompactionStyleLevel);
// Set Last level size 50000
// num_levels - 1 target 5000
// num_levels - 2 is base level with taret 500
Add(num_levels - 1, 10U, "400", "500", 50000);
Add(0, 1U, "150", "200", 200);
Add(0, 2U, "150", "200", 200);
Add(0, 4U, "150", "200", 200);
Add(0, 5U, "150", "200", 200);
Add(0, 6U, "150", "200", 200);
// num_levels - 3 is over target by 100 + 1000
Add(num_levels - 3, 7U, "400", "500", 300);
Add(num_levels - 3, 8U, "600", "700", 300);
// num_levels - 2 is over target by 1100 + 200
Add(num_levels - 2, 9U, "150", "200", 5200);
UpdateVersionStorageInfo();
// Merging to the second last level: (5200 / 1600 + 1) * 1100
// Merging to the last level: (50000 / 6300 + 1) * 1300
ASSERT_EQ(1600u + 4675u + 11617u,
vstorage_->estimated_compaction_needed_bytes());
}
TEST_F(CompactionPickerTest, IsBottommostLevelTest) {
// case 1: Higher levels are empty
NewVersionStorage(6, kCompactionStyleLevel);
Add(0, 1U, "a", "m");
Add(0, 2U, "c", "z");
Add(1, 3U, "d", "e");
Add(1, 4U, "l", "p");
Add(2, 5U, "g", "i");
Add(2, 6U, "x", "z");
UpdateVersionStorageInfo();
SetCompactionInputFilesLevels(2, 1);
AddToCompactionFiles(3U);
AddToCompactionFiles(5U);
bool result =
Compaction::TEST_IsBottommostLevel(2, vstorage_.get(), input_files_);
ASSERT_TRUE(result);
// case 2: Higher levels have no overlap
NewVersionStorage(6, kCompactionStyleLevel);
Add(0, 1U, "a", "m");
Add(0, 2U, "c", "z");
Add(1, 3U, "d", "e");
Add(1, 4U, "l", "p");
Add(2, 5U, "g", "i");
Add(2, 6U, "x", "z");
Add(3, 7U, "k", "p");
Add(3, 8U, "t", "w");
Add(4, 9U, "a", "b");
Add(5, 10U, "c", "cc");
UpdateVersionStorageInfo();