rocksdb/db/compaction_picker_test.cc

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// Copyright (c) 2013, 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_picker.h"
#include <limits>
#include <string>
#include "util/logging.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class CountingLogger : public Logger {
public:
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using Logger::Logv;
virtual void Logv(const char* format, va_list ap) override { log_count++; }
size_t log_count;
};
class CompactionPickerTest {
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_;
CompactionPickerTest()
: ucmp_(BytewiseComparator()),
icmp_(ucmp_),
ioptions_(options_),
mutable_cf_options_(options_, ioptions_),
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));
}
void DeleteVersionStorage() {
vstorage_.reset();
files_.clear();
}
void Add(int level, uint32_t file_number, const char* smallest,
const char* largest, uint64_t file_size = 0, 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->compensated_file_size = file_size;
f->refs = 0;
vstorage_->AddFile(level, f);
files_.emplace_back(f);
}
void UpdateVersionStorageInfo() {
vstorage_->UpdateFilesBySize();
vstorage_->UpdateNumNonEmptyLevels();
vstorage_->GenerateFileIndexer();
vstorage_->GenerateLevelFilesBrief();
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vstorage_->ComputeCompactionScore(mutable_cf_options_, fifo_options_);
vstorage_->SetFinalized();
}
};
TEST(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(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(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(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(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(CompactionPickerTest, LevelMaxScore) {
NewVersionStorage(6, kCompactionStyleLevel);
mutable_cf_options_.target_file_size_base = 10000000;
mutable_cf_options_.target_file_size_multiplier = 10;
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(CompactionPickerTest, NeedsCompactionLevel) {
const int kLevels = 6;
const int kFileCount = 20;
for (int level = 0; level < kLevels - 1; ++level) {
uint64_t file_size =
mutable_cf_options_.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(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);
// verify the trigger given different number of L0 files.
for (int i = 1;
i <= mutable_cf_options_.level0_file_num_compaction_trigger * 2; ++i) {
Add(0, i, ToString((i + 100) * 1000).c_str(),
ToString((i + 100) * 1000 + 999).c_str(), 1000000, 0, i * 100,
i * 100 + 99);
ASSERT_EQ(level_compaction_picker.NeedsCompaction(vstorage_.get()),
vstorage_->CompactionScore(0) >= 1);
}
}
TEST(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_);
// 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) {
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;
ASSERT_EQ(level_compaction_picker.NeedsCompaction(vstorage_.get()),
vstorage_->CompactionScore(0) >= 1);
}
}
} // namespace rocksdb
int main(int argc, char** argv) { return rocksdb::test::RunAllTests(); }