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rocksdb/db/flush_job_test.cc

647 lines
24 KiB

// 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).
#include "db/flush_job.h"
#include <algorithm>
#include <array>
#include <map>
#include <string>
#include "db/blob/blob_index.h"
#include "db/column_family.h"
#include "db/db_impl/db_impl.h"
#include "db/version_set.h"
#include "file/writable_file_writer.h"
#include "rocksdb/cache.h"
#include "rocksdb/write_buffer_manager.h"
#include "table/mock_table.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/random.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
// TODO(icanadi) Mock out everything else:
// 1. VersionSet
// 2. Memtable
class FlushJobTestBase : public testing::Test {
protected:
FlushJobTestBase(std::string dbname, const Comparator* ucmp)
: env_(Env::Default()),
Introduce a new storage specific Env API (#5761) Summary: The current Env API encompasses both storage/file operations, as well as OS related operations. Most of the APIs return a Status, which does not have enough metadata about an error, such as whether its retry-able or not, scope (i.e fault domain) of the error etc., that may be required in order to properly handle a storage error. The file APIs also do not provide enough control over the IO SLA, such as timeout, prioritization, hinting about placement and redundancy etc. This PR separates out the file/storage APIs from Env into a new FileSystem class. The APIs are updated to return an IOStatus with metadata about the error, as well as to take an IOOptions structure as input in order to allow more control over the IO. The user can set both ```options.env``` and ```options.file_system``` to specify that RocksDB should use the former for OS related operations and the latter for storage operations. Internally, a ```CompositeEnvWrapper``` has been introduced that inherits from ```Env``` and redirects individual methods to either an ```Env``` implementation or the ```FileSystem``` as appropriate. When options are sanitized during ```DB::Open```, ```options.env``` is replaced with a newly allocated ```CompositeEnvWrapper``` instance if both env and file_system have been specified. This way, the rest of the RocksDB code can continue to function as before. This PR also ports PosixEnv to the new API by splitting it into two - PosixEnv and PosixFileSystem. PosixEnv is defined as a sub-class of CompositeEnvWrapper, and threading/time functions are overridden with Posix specific implementations in order to avoid an extra level of indirection. The ```CompositeEnvWrapper``` translates ```IOStatus``` return code to ```Status```, and sets the severity to ```kSoftError``` if the io_status is retryable. The error handling code in RocksDB can then recover the DB automatically. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5761 Differential Revision: D18868376 Pulled By: anand1976 fbshipit-source-id: 39efe18a162ea746fabac6360ff529baba48486f
5 years ago
fs_(std::make_shared<LegacyFileSystemWrapper>(env_)),
dbname_(std::move(dbname)),
ucmp_(ucmp),
options_(),
db_options_(options_),
column_family_names_({kDefaultColumnFamilyName, "foo", "bar"}),
table_cache_(NewLRUCache(50000, 16)),
write_buffer_manager_(db_options_.db_write_buffer_size),
shutting_down_(false),
mock_table_factory_(new mock::MockTableFactory()) {}
virtual ~FlushJobTestBase() {
if (getenv("KEEP_DB")) {
fprintf(stdout, "db is still in %s\n", dbname_.c_str());
} else {
EXPECT_OK(DestroyDir(env_, dbname_));
}
}
void NewDB() {
SetIdentityFile(env_, dbname_);
VersionEdit new_db;
new_db.SetLogNumber(0);
new_db.SetNextFile(2);
new_db.SetLastSequence(0);
autovector<VersionEdit> new_cfs;
SequenceNumber last_seq = 1;
uint32_t cf_id = 1;
for (size_t i = 1; i != column_family_names_.size(); ++i) {
VersionEdit new_cf;
new_cf.AddColumnFamily(column_family_names_[i]);
new_cf.SetColumnFamily(cf_id++);
new_cf.SetComparatorName(ucmp_->Name());
new_cf.SetLogNumber(0);
new_cf.SetNextFile(2);
new_cf.SetLastSequence(last_seq++);
new_cfs.emplace_back(new_cf);
}
const std::string manifest = DescriptorFileName(dbname_, 1);
std::unique_ptr<WritableFile> file;
Status s = env_->NewWritableFile(
manifest, &file, env_->OptimizeForManifestWrite(env_options_));
ASSERT_OK(s);
Introduce a new storage specific Env API (#5761) Summary: The current Env API encompasses both storage/file operations, as well as OS related operations. Most of the APIs return a Status, which does not have enough metadata about an error, such as whether its retry-able or not, scope (i.e fault domain) of the error etc., that may be required in order to properly handle a storage error. The file APIs also do not provide enough control over the IO SLA, such as timeout, prioritization, hinting about placement and redundancy etc. This PR separates out the file/storage APIs from Env into a new FileSystem class. The APIs are updated to return an IOStatus with metadata about the error, as well as to take an IOOptions structure as input in order to allow more control over the IO. The user can set both ```options.env``` and ```options.file_system``` to specify that RocksDB should use the former for OS related operations and the latter for storage operations. Internally, a ```CompositeEnvWrapper``` has been introduced that inherits from ```Env``` and redirects individual methods to either an ```Env``` implementation or the ```FileSystem``` as appropriate. When options are sanitized during ```DB::Open```, ```options.env``` is replaced with a newly allocated ```CompositeEnvWrapper``` instance if both env and file_system have been specified. This way, the rest of the RocksDB code can continue to function as before. This PR also ports PosixEnv to the new API by splitting it into two - PosixEnv and PosixFileSystem. PosixEnv is defined as a sub-class of CompositeEnvWrapper, and threading/time functions are overridden with Posix specific implementations in order to avoid an extra level of indirection. The ```CompositeEnvWrapper``` translates ```IOStatus``` return code to ```Status```, and sets the severity to ```kSoftError``` if the io_status is retryable. The error handling code in RocksDB can then recover the DB automatically. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5761 Differential Revision: D18868376 Pulled By: anand1976 fbshipit-source-id: 39efe18a162ea746fabac6360ff529baba48486f
5 years ago
std::unique_ptr<WritableFileWriter> file_writer(new WritableFileWriter(
NewLegacyWritableFileWrapper(std::move(file)), manifest, EnvOptions()));
{
log::Writer log(std::move(file_writer), 0, false);
std::string record;
new_db.EncodeTo(&record);
s = log.AddRecord(record);
for (const auto& e : new_cfs) {
record.clear();
e.EncodeTo(&record);
s = log.AddRecord(record);
ASSERT_OK(s);
}
}
ASSERT_OK(s);
// Make "CURRENT" file that points to the new manifest file.
s = SetCurrentFile(fs_.get(), dbname_, 1, nullptr);
ASSERT_OK(s);
}
void SetUp() override {
EXPECT_OK(env_->CreateDirIfMissing(dbname_));
// TODO(icanadi) Remove this once we mock out VersionSet
NewDB();
db_options_.env = env_;
db_options_.fs = fs_;
db_options_.db_paths.emplace_back(dbname_,
std::numeric_limits<uint64_t>::max());
db_options_.statistics = CreateDBStatistics();
cf_options_.comparator = ucmp_;
std::vector<ColumnFamilyDescriptor> column_families;
cf_options_.table_factory = mock_table_factory_;
for (const auto& cf_name : column_family_names_) {
column_families.emplace_back(cf_name, cf_options_);
}
versions_.reset(
new VersionSet(dbname_, &db_options_, env_options_, table_cache_.get(),
&write_buffer_manager_, &write_controller_,
/*block_cache_tracer=*/nullptr, /*io_tracer=*/nullptr));
EXPECT_OK(versions_->Recover(column_families, false));
}
Env* env_;
Introduce a new storage specific Env API (#5761) Summary: The current Env API encompasses both storage/file operations, as well as OS related operations. Most of the APIs return a Status, which does not have enough metadata about an error, such as whether its retry-able or not, scope (i.e fault domain) of the error etc., that may be required in order to properly handle a storage error. The file APIs also do not provide enough control over the IO SLA, such as timeout, prioritization, hinting about placement and redundancy etc. This PR separates out the file/storage APIs from Env into a new FileSystem class. The APIs are updated to return an IOStatus with metadata about the error, as well as to take an IOOptions structure as input in order to allow more control over the IO. The user can set both ```options.env``` and ```options.file_system``` to specify that RocksDB should use the former for OS related operations and the latter for storage operations. Internally, a ```CompositeEnvWrapper``` has been introduced that inherits from ```Env``` and redirects individual methods to either an ```Env``` implementation or the ```FileSystem``` as appropriate. When options are sanitized during ```DB::Open```, ```options.env``` is replaced with a newly allocated ```CompositeEnvWrapper``` instance if both env and file_system have been specified. This way, the rest of the RocksDB code can continue to function as before. This PR also ports PosixEnv to the new API by splitting it into two - PosixEnv and PosixFileSystem. PosixEnv is defined as a sub-class of CompositeEnvWrapper, and threading/time functions are overridden with Posix specific implementations in order to avoid an extra level of indirection. The ```CompositeEnvWrapper``` translates ```IOStatus``` return code to ```Status```, and sets the severity to ```kSoftError``` if the io_status is retryable. The error handling code in RocksDB can then recover the DB automatically. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5761 Differential Revision: D18868376 Pulled By: anand1976 fbshipit-source-id: 39efe18a162ea746fabac6360ff529baba48486f
5 years ago
std::shared_ptr<FileSystem> fs_;
std::string dbname_;
const Comparator* const ucmp_;
EnvOptions env_options_;
Options options_;
ImmutableDBOptions db_options_;
const std::vector<std::string> column_family_names_;
std::shared_ptr<Cache> table_cache_;
WriteController write_controller_;
WriteBufferManager write_buffer_manager_;
ColumnFamilyOptions cf_options_;
std::unique_ptr<VersionSet> versions_;
InstrumentedMutex mutex_;
std::atomic<bool> shutting_down_;
std::shared_ptr<mock::MockTableFactory> mock_table_factory_;
};
class FlushJobTest : public FlushJobTestBase {
public:
FlushJobTest()
: FlushJobTestBase(test::PerThreadDBPath("flush_job_test"),
BytewiseComparator()) {}
};
rocksdb: switch to gtest Summary: Our existing test notation is very similar to what is used in gtest. It makes it easy to adopt what is different. In this diff I modify existing [[ https://code.google.com/p/googletest/wiki/Primer#Test_Fixtures:_Using_the_Same_Data_Configuration_for_Multiple_Te | test fixture ]] classes to inherit from `testing::Test`. Also for unit tests that use fixture class, `TEST` is replaced with `TEST_F` as required in gtest. There are several custom `main` functions in our existing tests. To make this transition easier, I modify all `main` functions to fallow gtest notation. But eventually we can remove them and use implementation of `main` that gtest provides. ```lang=bash % cat ~/transform #!/bin/sh files=$(git ls-files '*test\.cc') for file in $files do if grep -q "rocksdb::test::RunAllTests()" $file then if grep -Eq '^class \w+Test {' $file then perl -pi -e 's/^(class \w+Test) {/${1}: public testing::Test {/g' $file perl -pi -e 's/^(TEST)/${1}_F/g' $file fi perl -pi -e 's/(int main.*\{)/${1}::testing::InitGoogleTest(&argc, argv);/g' $file perl -pi -e 's/rocksdb::test::RunAllTests/RUN_ALL_TESTS/g' $file fi done % sh ~/transform % make format ``` Second iteration of this diff contains only scripted changes. Third iteration contains manual changes to fix last errors and make it compilable. Test Plan: Build and notice no errors. ```lang=bash % USE_CLANG=1 make check -j55 ``` Tests are still testing. Reviewers: meyering, sdong, rven, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D35157
10 years ago
TEST_F(FlushJobTest, Empty) {
JobContext job_context(0);
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
EventLogger event_logger(db_options_.info_log.get());
SnapshotChecker* snapshot_checker = nullptr; // not relavant
FlushJob flush_job(
dbname_, versions_->GetColumnFamilySet()->GetDefault(), db_options_,
*cfd->GetLatestMutableCFOptions(), port::kMaxUint64 /* memtable_id */,
env_options_, versions_.get(), &mutex_, &shutting_down_, {},
kMaxSequenceNumber, snapshot_checker, &job_context, nullptr, nullptr,
nullptr, kNoCompression, nullptr, &event_logger, false,
true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/);
{
InstrumentedMutexLock l(&mutex_);
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run());
}
10 years ago
job_context.Clean();
}
rocksdb: switch to gtest Summary: Our existing test notation is very similar to what is used in gtest. It makes it easy to adopt what is different. In this diff I modify existing [[ https://code.google.com/p/googletest/wiki/Primer#Test_Fixtures:_Using_the_Same_Data_Configuration_for_Multiple_Te | test fixture ]] classes to inherit from `testing::Test`. Also for unit tests that use fixture class, `TEST` is replaced with `TEST_F` as required in gtest. There are several custom `main` functions in our existing tests. To make this transition easier, I modify all `main` functions to fallow gtest notation. But eventually we can remove them and use implementation of `main` that gtest provides. ```lang=bash % cat ~/transform #!/bin/sh files=$(git ls-files '*test\.cc') for file in $files do if grep -q "rocksdb::test::RunAllTests()" $file then if grep -Eq '^class \w+Test {' $file then perl -pi -e 's/^(class \w+Test) {/${1}: public testing::Test {/g' $file perl -pi -e 's/^(TEST)/${1}_F/g' $file fi perl -pi -e 's/(int main.*\{)/${1}::testing::InitGoogleTest(&argc, argv);/g' $file perl -pi -e 's/rocksdb::test::RunAllTests/RUN_ALL_TESTS/g' $file fi done % sh ~/transform % make format ``` Second iteration of this diff contains only scripted changes. Third iteration contains manual changes to fix last errors and make it compilable. Test Plan: Build and notice no errors. ```lang=bash % USE_CLANG=1 make check -j55 ``` Tests are still testing. Reviewers: meyering, sdong, rven, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D35157
10 years ago
TEST_F(FlushJobTest, NonEmpty) {
JobContext job_context(0);
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
auto new_mem = cfd->ConstructNewMemtable(*cfd->GetLatestMutableCFOptions(),
kMaxSequenceNumber);
new_mem->Ref();
auto inserted_keys = mock::MakeMockFile();
// Test data:
// seqno [ 1, 2 ... 8998, 8999, 9000, 9001, 9002 ... 9999 ]
// key [ 1001, 1002 ... 9998, 9999, 0, 1, 2 ... 999 ]
// range-delete "9995" -> "9999" at seqno 10000
// blob references with seqnos 10001..10006
for (int i = 1; i < 10000; ++i) {
std::string key(ToString((i + 1000) % 10000));
std::string value("value" + key);
ASSERT_OK(new_mem->Add(SequenceNumber(i), kTypeValue, key, value));
if ((i + 1000) % 10000 < 9995) {
InternalKey internal_key(key, SequenceNumber(i), kTypeValue);
inserted_keys.push_back({internal_key.Encode().ToString(), value});
}
}
{
ASSERT_OK(new_mem->Add(SequenceNumber(10000), kTypeRangeDeletion, "9995",
"9999a"));
InternalKey internal_key("9995", SequenceNumber(10000), kTypeRangeDeletion);
inserted_keys.push_back({internal_key.Encode().ToString(), "9999a"});
}
// Note: the first two blob references will not be considered when resolving
// the oldest blob file referenced (the first one is inlined TTL, while the
// second one is TTL and thus points to a TTL blob file).
constexpr std::array<uint64_t, 6> blob_file_numbers{{
kInvalidBlobFileNumber, 5, 103, 17, 102, 101}};
for (size_t i = 0; i < blob_file_numbers.size(); ++i) {
std::string key(ToString(i + 10001));
std::string blob_index;
if (i == 0) {
BlobIndex::EncodeInlinedTTL(&blob_index, /* expiration */ 1234567890ULL,
"foo");
} else if (i == 1) {
BlobIndex::EncodeBlobTTL(&blob_index, /* expiration */ 1234567890ULL,
blob_file_numbers[i], /* offset */ i << 10,
/* size */ i << 20, kNoCompression);
} else {
BlobIndex::EncodeBlob(&blob_index, blob_file_numbers[i],
/* offset */ i << 10, /* size */ i << 20,
kNoCompression);
}
const SequenceNumber seq(i + 10001);
ASSERT_OK(new_mem->Add(seq, kTypeBlobIndex, key, blob_index));
InternalKey internal_key(key, seq, kTypeBlobIndex);
inserted_keys.push_back({internal_key.Encode().ToString(), blob_index});
}
mock::SortKVVector(&inserted_keys);
Support saving history in memtable_list Summary: For transactions, we are using the memtables to validate that there are no write conflicts. But after flushing, we don't have any memtables, and transactions could fail to commit. So we want to someone keep around some extra history to use for conflict checking. In addition, we want to provide a way to increase the size of this history if too many transactions fail to commit. After chatting with people, it seems like everyone prefers just using Memtables to store this history (instead of a separate history structure). It seems like the best place for this is abstracted inside the memtable_list. I decide to create a separate list in MemtableListVersion as using the same list complicated the flush/installalflushresults logic too much. This diff adds a new parameter to control how much memtable history to keep around after flushing. However, it sounds like people aren't too fond of adding new parameters. So I am making the default size of flushed+not-flushed memtables be set to max_write_buffers. This should not change the maximum amount of memory used, but make it more likely we're using closer the the limit. (We are now postponing deleting flushed memtables until the max_write_buffer limit is reached). So while we might use more memory on average, we are still obeying the limit set (and you could argue it's better to go ahead and use up memory now instead of waiting for a write stall to happen to test this limit). However, if people are opposed to this default behavior, we can easily set it to 0 and require this parameter be set in order to use transactions. Test Plan: Added a xfunc test to play around with setting different values of this parameter in all tests. Added testing in memtablelist_test and planning on adding more testing here. Reviewers: sdong, rven, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D37443
10 years ago
autovector<MemTable*> to_delete;
cfd->imm()->Add(new_mem, &to_delete);
for (auto& m : to_delete) {
delete m;
}
EventLogger event_logger(db_options_.info_log.get());
SnapshotChecker* snapshot_checker = nullptr; // not relavant
FlushJob flush_job(
dbname_, versions_->GetColumnFamilySet()->GetDefault(), db_options_,
*cfd->GetLatestMutableCFOptions(), port::kMaxUint64 /* memtable_id */,
env_options_, versions_.get(), &mutex_, &shutting_down_, {},
kMaxSequenceNumber, snapshot_checker, &job_context, nullptr, nullptr,
nullptr, kNoCompression, db_options_.statistics.get(), &event_logger,
true, true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/);
HistogramData hist;
FileMetaData file_meta;
mutex_.Lock();
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run(nullptr, &file_meta));
mutex_.Unlock();
db_options_.statistics->histogramData(FLUSH_TIME, &hist);
ASSERT_GT(hist.average, 0.0);
ASSERT_EQ(ToString(0), file_meta.smallest.user_key().ToString());
ASSERT_EQ("9999a", file_meta.largest.user_key().ToString());
ASSERT_EQ(1, file_meta.fd.smallest_seqno);
ASSERT_EQ(10006, file_meta.fd.largest_seqno);
ASSERT_EQ(17, file_meta.oldest_blob_file_number);
mock_table_factory_->AssertSingleFile(inserted_keys);
job_context.Clean();
}
TEST_F(FlushJobTest, FlushMemTablesSingleColumnFamily) {
const size_t num_mems = 2;
const size_t num_mems_to_flush = 1;
const size_t num_keys_per_table = 100;
JobContext job_context(0);
ColumnFamilyData* cfd = versions_->GetColumnFamilySet()->GetDefault();
std::vector<uint64_t> memtable_ids;
std::vector<MemTable*> new_mems;
for (size_t i = 0; i != num_mems; ++i) {
MemTable* mem = cfd->ConstructNewMemtable(*cfd->GetLatestMutableCFOptions(),
kMaxSequenceNumber);
mem->SetID(i);
mem->Ref();
new_mems.emplace_back(mem);
memtable_ids.push_back(mem->GetID());
for (size_t j = 0; j < num_keys_per_table; ++j) {
std::string key(ToString(j + i * num_keys_per_table));
std::string value("value" + key);
ASSERT_OK(mem->Add(SequenceNumber(j + i * num_keys_per_table), kTypeValue,
key, value));
}
}
autovector<MemTable*> to_delete;
for (auto mem : new_mems) {
cfd->imm()->Add(mem, &to_delete);
}
EventLogger event_logger(db_options_.info_log.get());
SnapshotChecker* snapshot_checker = nullptr; // not relavant
assert(memtable_ids.size() == num_mems);
uint64_t smallest_memtable_id = memtable_ids.front();
uint64_t flush_memtable_id = smallest_memtable_id + num_mems_to_flush - 1;
FlushJob flush_job(
dbname_, versions_->GetColumnFamilySet()->GetDefault(), db_options_,
*cfd->GetLatestMutableCFOptions(), flush_memtable_id, env_options_,
versions_.get(), &mutex_, &shutting_down_, {}, kMaxSequenceNumber,
snapshot_checker, &job_context, nullptr, nullptr, nullptr, kNoCompression,
db_options_.statistics.get(), &event_logger, true,
true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/);
HistogramData hist;
FileMetaData file_meta;
mutex_.Lock();
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run(nullptr /* prep_tracker */, &file_meta));
mutex_.Unlock();
db_options_.statistics->histogramData(FLUSH_TIME, &hist);
ASSERT_GT(hist.average, 0.0);
ASSERT_EQ(ToString(0), file_meta.smallest.user_key().ToString());
ASSERT_EQ("99", file_meta.largest.user_key().ToString());
ASSERT_EQ(0, file_meta.fd.smallest_seqno);
ASSERT_EQ(SequenceNumber(num_mems_to_flush * num_keys_per_table - 1),
file_meta.fd.largest_seqno);
ASSERT_EQ(kInvalidBlobFileNumber, file_meta.oldest_blob_file_number);
for (auto m : to_delete) {
delete m;
}
to_delete.clear();
job_context.Clean();
}
TEST_F(FlushJobTest, FlushMemtablesMultipleColumnFamilies) {
autovector<ColumnFamilyData*> all_cfds;
for (auto cfd : *versions_->GetColumnFamilySet()) {
all_cfds.push_back(cfd);
}
const std::vector<size_t> num_memtables = {2, 1, 3};
assert(num_memtables.size() == column_family_names_.size());
const size_t num_keys_per_memtable = 1000;
JobContext job_context(0);
std::vector<uint64_t> memtable_ids;
std::vector<SequenceNumber> smallest_seqs;
std::vector<SequenceNumber> largest_seqs;
autovector<MemTable*> to_delete;
SequenceNumber curr_seqno = 0;
size_t k = 0;
for (auto cfd : all_cfds) {
smallest_seqs.push_back(curr_seqno);
for (size_t i = 0; i != num_memtables[k]; ++i) {
MemTable* mem = cfd->ConstructNewMemtable(
*cfd->GetLatestMutableCFOptions(), kMaxSequenceNumber);
mem->SetID(i);
mem->Ref();
for (size_t j = 0; j != num_keys_per_memtable; ++j) {
std::string key(ToString(j + i * num_keys_per_memtable));
std::string value("value" + key);
ASSERT_OK(mem->Add(curr_seqno++, kTypeValue, key, value));
}
cfd->imm()->Add(mem, &to_delete);
}
largest_seqs.push_back(curr_seqno - 1);
memtable_ids.push_back(num_memtables[k++] - 1);
}
EventLogger event_logger(db_options_.info_log.get());
SnapshotChecker* snapshot_checker = nullptr; // not relevant
std::vector<std::unique_ptr<FlushJob>> flush_jobs;
k = 0;
for (auto cfd : all_cfds) {
std::vector<SequenceNumber> snapshot_seqs;
flush_jobs.emplace_back(new FlushJob(
dbname_, cfd, db_options_, *cfd->GetLatestMutableCFOptions(),
memtable_ids[k], env_options_, versions_.get(), &mutex_,
&shutting_down_, snapshot_seqs, kMaxSequenceNumber, snapshot_checker,
&job_context, nullptr, nullptr, nullptr, kNoCompression,
db_options_.statistics.get(), &event_logger, true,
false /* sync_output_directory */, false /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/));
k++;
}
HistogramData hist;
std::vector<FileMetaData> file_metas;
// Call reserve to avoid auto-resizing
file_metas.reserve(flush_jobs.size());
mutex_.Lock();
for (auto& job : flush_jobs) {
job->PickMemTable();
}
for (auto& job : flush_jobs) {
FileMetaData meta;
// Run will release and re-acquire mutex
ASSERT_OK(job->Run(nullptr /**/, &meta));
file_metas.emplace_back(meta);
}
autovector<FileMetaData*> file_meta_ptrs;
for (auto& meta : file_metas) {
file_meta_ptrs.push_back(&meta);
}
autovector<const autovector<MemTable*>*> mems_list;
for (size_t i = 0; i != all_cfds.size(); ++i) {
const auto& mems = flush_jobs[i]->GetMemTables();
mems_list.push_back(&mems);
}
autovector<const MutableCFOptions*> mutable_cf_options_list;
for (auto cfd : all_cfds) {
mutable_cf_options_list.push_back(cfd->GetLatestMutableCFOptions());
}
Status s = InstallMemtableAtomicFlushResults(
nullptr /* imm_lists */, all_cfds, mutable_cf_options_list, mems_list,
versions_.get(), nullptr /* prep_tracker */, &mutex_, file_meta_ptrs,
&job_context.memtables_to_free, nullptr /* db_directory */,
nullptr /* log_buffer */);
ASSERT_OK(s);
mutex_.Unlock();
db_options_.statistics->histogramData(FLUSH_TIME, &hist);
ASSERT_GT(hist.average, 0.0);
k = 0;
for (const auto& file_meta : file_metas) {
ASSERT_EQ(ToString(0), file_meta.smallest.user_key().ToString());
ASSERT_EQ("999", file_meta.largest.user_key()
.ToString()); // max key by bytewise comparator
ASSERT_EQ(smallest_seqs[k], file_meta.fd.smallest_seqno);
ASSERT_EQ(largest_seqs[k], file_meta.fd.largest_seqno);
// Verify that imm is empty
ASSERT_EQ(std::numeric_limits<uint64_t>::max(),
all_cfds[k]->imm()->GetEarliestMemTableID());
ASSERT_EQ(0, all_cfds[k]->imm()->GetLatestMemTableID());
++k;
}
for (auto m : to_delete) {
delete m;
}
to_delete.clear();
job_context.Clean();
}
TEST_F(FlushJobTest, Snapshots) {
JobContext job_context(0);
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
auto new_mem = cfd->ConstructNewMemtable(*cfd->GetLatestMutableCFOptions(),
kMaxSequenceNumber);
std::set<SequenceNumber> snapshots_set;
int keys = 10000;
int max_inserts_per_keys = 8;
Random rnd(301);
for (int i = 0; i < keys / 2; ++i) {
snapshots_set.insert(rnd.Uniform(keys * (max_inserts_per_keys / 2)) + 1);
}
// set has already removed the duplicate snapshots
std::vector<SequenceNumber> snapshots(snapshots_set.begin(),
snapshots_set.end());
new_mem->Ref();
SequenceNumber current_seqno = 0;
auto inserted_keys = mock::MakeMockFile();
for (int i = 1; i < keys; ++i) {
std::string key(ToString(i));
int insertions = rnd.Uniform(max_inserts_per_keys);
for (int j = 0; j < insertions; ++j) {
std::string value(rnd.HumanReadableString(10));
auto seqno = ++current_seqno;
ASSERT_OK(new_mem->Add(SequenceNumber(seqno), kTypeValue, key, value));
// a key is visible only if:
// 1. it's the last one written (j == insertions - 1)
// 2. there's a snapshot pointing at it
bool visible = (j == insertions - 1) ||
(snapshots_set.find(seqno) != snapshots_set.end());
if (visible) {
InternalKey internal_key(key, seqno, kTypeValue);
inserted_keys.push_back({internal_key.Encode().ToString(), value});
}
}
}
mock::SortKVVector(&inserted_keys);
autovector<MemTable*> to_delete;
cfd->imm()->Add(new_mem, &to_delete);
for (auto& m : to_delete) {
delete m;
}
EventLogger event_logger(db_options_.info_log.get());
SnapshotChecker* snapshot_checker = nullptr; // not relavant
FlushJob flush_job(
dbname_, versions_->GetColumnFamilySet()->GetDefault(), db_options_,
*cfd->GetLatestMutableCFOptions(), port::kMaxUint64 /* memtable_id */,
env_options_, versions_.get(), &mutex_, &shutting_down_, snapshots,
kMaxSequenceNumber, snapshot_checker, &job_context, nullptr, nullptr,
nullptr, kNoCompression, db_options_.statistics.get(), &event_logger,
true, true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/);
mutex_.Lock();
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run());
mutex_.Unlock();
mock_table_factory_->AssertSingleFile(inserted_keys);
HistogramData hist;
db_options_.statistics->histogramData(FLUSH_TIME, &hist);
ASSERT_GT(hist.average, 0.0);
10 years ago
job_context.Clean();
}
class FlushJobTimestampTest : public FlushJobTestBase {
public:
FlushJobTimestampTest()
: FlushJobTestBase(test::PerThreadDBPath("flush_job_ts_gc_test"),
test::ComparatorWithU64Ts()) {}
void AddKeyValueToMemtable(MemTable* memtable, std::string key, uint64_t ts,
SequenceNumber seq, ValueType value_type,
Slice value) {
std::string key_str(std::move(key));
PutFixed64(&key_str, ts);
ASSERT_OK(memtable->Add(seq, value_type, key_str, value));
}
protected:
static constexpr uint64_t kStartTs = 10;
static constexpr SequenceNumber kStartSeq = 0;
SequenceNumber curr_seq_{kStartSeq};
std::atomic<uint64_t> curr_ts_{kStartTs};
};
TEST_F(FlushJobTimestampTest, AllKeysExpired) {
ColumnFamilyData* cfd = versions_->GetColumnFamilySet()->GetDefault();
autovector<MemTable*> to_delete;
{
MemTable* new_mem = cfd->ConstructNewMemtable(
*cfd->GetLatestMutableCFOptions(), kMaxSequenceNumber);
new_mem->Ref();
for (int i = 0; i < 100; ++i) {
uint64_t ts = curr_ts_.fetch_add(1);
SequenceNumber seq = (curr_seq_++);
AddKeyValueToMemtable(new_mem, test::EncodeInt(0), ts, seq,
ValueType::kTypeValue, "0_value");
}
uint64_t ts = curr_ts_.fetch_add(1);
SequenceNumber seq = (curr_seq_++);
AddKeyValueToMemtable(new_mem, test::EncodeInt(0), ts, seq,
ValueType::kTypeDeletionWithTimestamp, "");
cfd->imm()->Add(new_mem, &to_delete);
}
std::vector<SequenceNumber> snapshots;
constexpr SnapshotChecker* const snapshot_checker = nullptr;
JobContext job_context(0);
EventLogger event_logger(db_options_.info_log.get());
std::string full_history_ts_low;
PutFixed64(&full_history_ts_low, std::numeric_limits<uint64_t>::max());
FlushJob flush_job(
dbname_, cfd, db_options_, *cfd->GetLatestMutableCFOptions(),
port::kMaxUint64 /* memtable_id */, env_options_, versions_.get(),
&mutex_, &shutting_down_, snapshots, kMaxSequenceNumber, snapshot_checker,
&job_context, nullptr, nullptr, nullptr, kNoCompression,
db_options_.statistics.get(), &event_logger, true,
true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/, /*db_id=*/"",
/*db_session_id=*/"", full_history_ts_low);
FileMetaData fmeta;
mutex_.Lock();
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run(/*prep_tracker=*/nullptr, &fmeta));
mutex_.Unlock();
{
std::string key = test::EncodeInt(0);
key.append(test::EncodeInt(curr_ts_.load(std::memory_order_relaxed) - 1));
InternalKey ikey(key, curr_seq_ - 1, ValueType::kTypeDeletionWithTimestamp);
ASSERT_EQ(ikey.Encode(), fmeta.smallest.Encode());
ASSERT_EQ(ikey.Encode(), fmeta.largest.Encode());
}
job_context.Clean();
ASSERT_TRUE(to_delete.empty());
}
TEST_F(FlushJobTimestampTest, NoKeyExpired) {
ColumnFamilyData* cfd = versions_->GetColumnFamilySet()->GetDefault();
autovector<MemTable*> to_delete;
{
MemTable* new_mem = cfd->ConstructNewMemtable(
*cfd->GetLatestMutableCFOptions(), kMaxSequenceNumber);
new_mem->Ref();
for (int i = 0; i < 100; ++i) {
uint64_t ts = curr_ts_.fetch_add(1);
SequenceNumber seq = (curr_seq_++);
AddKeyValueToMemtable(new_mem, test::EncodeInt(0), ts, seq,
ValueType::kTypeValue, "0_value");
}
cfd->imm()->Add(new_mem, &to_delete);
}
std::vector<SequenceNumber> snapshots;
SnapshotChecker* const snapshot_checker = nullptr;
JobContext job_context(0);
EventLogger event_logger(db_options_.info_log.get());
std::string full_history_ts_low;
PutFixed64(&full_history_ts_low, 0);
FlushJob flush_job(
dbname_, cfd, db_options_, *cfd->GetLatestMutableCFOptions(),
port::kMaxUint64 /* memtable_id */, env_options_, versions_.get(),
&mutex_, &shutting_down_, snapshots, kMaxSequenceNumber, snapshot_checker,
&job_context, nullptr, nullptr, nullptr, kNoCompression,
db_options_.statistics.get(), &event_logger, true,
true /* sync_output_directory */, true /* write_manifest */,
Env::Priority::USER, nullptr /*IOTracer*/, /*db_id=*/"",
/*db_session_id=*/"", full_history_ts_low);
FileMetaData fmeta;
mutex_.Lock();
flush_job.PickMemTable();
ASSERT_OK(flush_job.Run(/*prep_tracker=*/nullptr, &fmeta));
mutex_.Unlock();
{
std::string ukey = test::EncodeInt(0);
std::string smallest_key =
ukey + test::EncodeInt(curr_ts_.load(std::memory_order_relaxed) - 1);
std::string largest_key = ukey + test::EncodeInt(kStartTs);
InternalKey smallest(smallest_key, curr_seq_ - 1, ValueType::kTypeValue);
InternalKey largest(largest_key, kStartSeq, ValueType::kTypeValue);
ASSERT_EQ(smallest.Encode(), fmeta.smallest.Encode());
ASSERT_EQ(largest.Encode(), fmeta.largest.Encode());
}
job_context.Clean();
ASSERT_TRUE(to_delete.empty());
}
} // namespace ROCKSDB_NAMESPACE
rocksdb: switch to gtest Summary: Our existing test notation is very similar to what is used in gtest. It makes it easy to adopt what is different. In this diff I modify existing [[ https://code.google.com/p/googletest/wiki/Primer#Test_Fixtures:_Using_the_Same_Data_Configuration_for_Multiple_Te | test fixture ]] classes to inherit from `testing::Test`. Also for unit tests that use fixture class, `TEST` is replaced with `TEST_F` as required in gtest. There are several custom `main` functions in our existing tests. To make this transition easier, I modify all `main` functions to fallow gtest notation. But eventually we can remove them and use implementation of `main` that gtest provides. ```lang=bash % cat ~/transform #!/bin/sh files=$(git ls-files '*test\.cc') for file in $files do if grep -q "rocksdb::test::RunAllTests()" $file then if grep -Eq '^class \w+Test {' $file then perl -pi -e 's/^(class \w+Test) {/${1}: public testing::Test {/g' $file perl -pi -e 's/^(TEST)/${1}_F/g' $file fi perl -pi -e 's/(int main.*\{)/${1}::testing::InitGoogleTest(&argc, argv);/g' $file perl -pi -e 's/rocksdb::test::RunAllTests/RUN_ALL_TESTS/g' $file fi done % sh ~/transform % make format ``` Second iteration of this diff contains only scripted changes. Third iteration contains manual changes to fix last errors and make it compilable. Test Plan: Build and notice no errors. ```lang=bash % USE_CLANG=1 make check -j55 ``` Tests are still testing. Reviewers: meyering, sdong, rven, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D35157
10 years ago
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}