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rocksdb/db/compaction_job_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 <map>
#include <string>
#include "db/compaction_job.h"
#include "db/column_family.h"
#include "db/version_set.h"
#include "rocksdb/cache.h"
#include "rocksdb/options.h"
#include "rocksdb/db.h"
#include "util/testharness.h"
#include "util/testutil.h"
#include "table/mock_table.h"
namespace rocksdb {
// TODO(icanadi) Make it simpler once we mock out VersionSet
class CompactionJobTest {
public:
CompactionJobTest()
: env_(Env::Default()),
dbname_(test::TmpDir() + "/compaction_job_test"),
table_cache_(NewLRUCache(50000, 16, 8)),
versions_(new VersionSet(dbname_, &db_options_, env_options_,
table_cache_.get(), &write_controller_)),
shutting_down_(false),
mock_table_factory_(new mock::MockTableFactory()) {
ASSERT_OK(env_->CreateDirIfMissing(dbname_));
db_options_.db_paths.emplace_back(dbname_,
std::numeric_limits<uint64_t>::max());
NewDB();
std::vector<ColumnFamilyDescriptor> column_families;
cf_options_.table_factory = mock_table_factory_;
column_families.emplace_back(kDefaultColumnFamilyName, cf_options_);
mutable_cf_options_.RefreshDerivedOptions(ImmutableCFOptions(Options()));
ASSERT_OK(versions_->Recover(column_families, false));
}
std::string GenerateFileName(uint64_t file_number) {
FileMetaData meta;
std::vector<DbPath> db_paths;
db_paths.emplace_back(dbname_, std::numeric_limits<uint64_t>::max());
meta.fd = FileDescriptor(file_number, 0, 0);
return TableFileName(db_paths, meta.fd.GetNumber(), meta.fd.GetPathId());
}
// returns expected result after compaction
mock::MockFileContents CreateTwoFiles() {
mock::MockFileContents expected_results;
const int kKeysPerFile = 10000;
SequenceNumber sequence_number = 0;
for (int i = 0; i < 2; ++i) {
mock::MockFileContents contents;
SequenceNumber smallest_seqno, largest_seqno;
InternalKey smallest, largest;
for (int k = 0; k < kKeysPerFile; ++k) {
auto key = std::to_string(i * (kKeysPerFile / 2) + k);
auto value = std::to_string(i * kKeysPerFile + k);
InternalKey internal_key(key, ++sequence_number, kTypeValue);
if (k == 0) {
smallest = internal_key;
smallest_seqno = sequence_number;
} else if (k == kKeysPerFile - 1) {
largest = internal_key;
largest_seqno = sequence_number;
}
std::pair<std::string, std::string> key_value(
{internal_key.Encode().ToString(), value});
contents.insert(key_value);
if (i == 1 || k < kKeysPerFile / 2) {
expected_results.insert(key_value);
}
}
uint64_t file_number = versions_->NewFileNumber();
ASSERT_OK(mock_table_factory_->CreateMockTable(
env_, GenerateFileName(file_number), std::move(contents)));
VersionEdit edit;
edit.AddFile(0, file_number, 0, 10, smallest, largest, smallest_seqno,
largest_seqno);
mutex_.Lock();
versions_->LogAndApply(versions_->GetColumnFamilySet()->GetDefault(),
mutable_cf_options_, &edit, &mutex_);
mutex_.Unlock();
}
versions_->SetLastSequence(sequence_number);
return expected_results;
}
void NewDB() {
VersionEdit new_db;
new_db.SetLogNumber(0);
new_db.SetNextFile(2);
new_db.SetLastSequence(0);
const std::string manifest = DescriptorFileName(dbname_, 1);
unique_ptr<WritableFile> file;
Status s = env_->NewWritableFile(
manifest, &file, env_->OptimizeForManifestWrite(env_options_));
ASSERT_OK(s);
{
log::Writer log(std::move(file));
std::string record;
new_db.EncodeTo(&record);
s = log.AddRecord(record);
}
ASSERT_OK(s);
// Make "CURRENT" file that points to the new manifest file.
s = SetCurrentFile(env_, dbname_, 1, nullptr);
}
Env* env_;
std::string dbname_;
EnvOptions env_options_;
MutableCFOptions mutable_cf_options_;
std::shared_ptr<Cache> table_cache_;
WriteController write_controller_;
DBOptions db_options_;
ColumnFamilyOptions cf_options_;
std::unique_ptr<VersionSet> versions_;
port::Mutex mutex_;
std::atomic<bool> shutting_down_;
std::shared_ptr<mock::MockTableFactory> mock_table_factory_;
};
TEST(CompactionJobTest, Simple) {
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
auto expected_results = CreateTwoFiles();
auto files = cfd->current()->storage_info()->LevelFiles(0);
ASSERT_EQ(2U, files.size());
std::unique_ptr<Compaction> compaction(Compaction::TEST_NewCompaction(
7, 0, 1, 1024 * 1024, 10, 0, kNoCompression));
compaction->SetInputVersion(cfd->current());
auto compaction_input_files = compaction->TEST_GetInputFiles(0);
compaction_input_files->level = 0;
compaction_input_files->files.push_back(files[0]);
compaction_input_files->files.push_back(files[1]);
SnapshotList snapshots;
int yield_callback_called = 0;
std::function<uint64_t()> yield_callback = [&]() {
yield_callback_called++;
return 0;
};
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL, db_options_.info_log.get());
mutex_.Lock();
CompactionJob compaction_job(
compaction.get(), db_options_, *cfd->GetLatestMutableCFOptions(),
env_options_, versions_.get(), &shutting_down_, &log_buffer, nullptr,
nullptr, &snapshots, true, table_cache_, std::move(yield_callback));
compaction_job.Prepare();
mutex_.Unlock();
ASSERT_OK(compaction_job.Run());
mutex_.Lock();
Status s;
compaction_job.Install(&s, &mutex_);
ASSERT_OK(s);
mutex_.Unlock();
mock_table_factory_->AssertLatestFile(expected_results);
ASSERT_EQ(yield_callback_called, 20000);
}
} // namespace rocksdb
int main(int argc, char** argv) { return rocksdb::test::RunAllTests(); }