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rocksdb/db/compaction/compaction_job_test.cc

1083 lines
41 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).
#ifndef ROCKSDB_LITE
#include <algorithm>
#include <array>
#include <cinttypes>
#include <map>
#include <string>
#include <tuple>
#include "db/blob_index.h"
#include "db/column_family.h"
#include "db/compaction/compaction_job.h"
#include "db/db_impl/db_impl.h"
#include "db/error_handler.h"
#include "db/version_set.h"
#include "file/writable_file_writer.h"
#include "rocksdb/cache.h"
#include "rocksdb/db.h"
#include "rocksdb/options.h"
#include "rocksdb/write_buffer_manager.h"
#include "table/mock_table.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/string_util.h"
#include "utilities/merge_operators.h"
namespace ROCKSDB_NAMESPACE {
namespace {
void VerifyInitializationOfCompactionJobStats(
const CompactionJobStats& compaction_job_stats) {
#if !defined(IOS_CROSS_COMPILE)
ASSERT_EQ(compaction_job_stats.elapsed_micros, 0U);
ASSERT_EQ(compaction_job_stats.num_input_records, 0U);
ASSERT_EQ(compaction_job_stats.num_input_files, 0U);
ASSERT_EQ(compaction_job_stats.num_input_files_at_output_level, 0U);
ASSERT_EQ(compaction_job_stats.num_output_records, 0U);
ASSERT_EQ(compaction_job_stats.num_output_files, 0U);
ASSERT_EQ(compaction_job_stats.is_manual_compaction, true);
ASSERT_EQ(compaction_job_stats.total_input_bytes, 0U);
ASSERT_EQ(compaction_job_stats.total_output_bytes, 0U);
ASSERT_EQ(compaction_job_stats.total_input_raw_key_bytes, 0U);
ASSERT_EQ(compaction_job_stats.total_input_raw_value_bytes, 0U);
ASSERT_EQ(compaction_job_stats.smallest_output_key_prefix[0], 0);
ASSERT_EQ(compaction_job_stats.largest_output_key_prefix[0], 0);
ASSERT_EQ(compaction_job_stats.num_records_replaced, 0U);
ASSERT_EQ(compaction_job_stats.num_input_deletion_records, 0U);
ASSERT_EQ(compaction_job_stats.num_expired_deletion_records, 0U);
ASSERT_EQ(compaction_job_stats.num_corrupt_keys, 0U);
#endif // !defined(IOS_CROSS_COMPILE)
}
} // namespace
// TODO(icanadi) Make it simpler once we mock out VersionSet
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
class CompactionJobTest : public testing::Test {
public:
CompactionJobTest()
: 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_(test::PerThreadDBPath("compaction_job_test")),
db_options_(),
mutable_cf_options_(cf_options_),
table_cache_(NewLRUCache(50000, 16)),
write_buffer_manager_(db_options_.db_write_buffer_size),
versions_(new VersionSet(dbname_, &db_options_, env_options_,
table_cache_.get(), &write_buffer_manager_,
&write_controller_,
/*block_cache_tracer=*/nullptr)),
shutting_down_(false),
Added support for differential snapshots Summary: The motivation for this PR is to add to RocksDB support for differential (incremental) snapshots, as snapshot of the DB changes between two points in time (one can think of it as diff between to sequence numbers, or the diff D which can be thought of as an SST file or just set of KVs that can be applied to sequence number S1 to get the database to the state at sequence number S2). This feature would be useful for various distributed storages layers built on top of RocksDB, as it should help reduce resources (time and network bandwidth) needed to recover and rebuilt DB instances as replicas in the context of distributed storages. From the API standpoint that would like client app requesting iterator between (start seqnum) and current DB state, and reading the "diff". This is a very draft PR for initial review in the discussion on the approach, i'm going to rework some parts and keep updating the PR. For now, what's done here according to initial discussions: Preserving deletes: - We want to be able to optionally preserve recent deletes for some defined period of time, so that if a delete came in recently and might need to be included in the next incremental snapshot it would't get dropped by a compaction. This is done by adding new param to Options (preserve deletes flag) and new variable to DB Impl where we keep track of the sequence number after which we don't want to drop tombstones, even if they are otherwise eligible for deletion. - I also added a new API call for clients to be able to advance this cutoff seqnum after which we drop deletes; i assume it's more flexible to let clients control this, since otherwise we'd need to keep some kind of timestamp < -- > seqnum mapping inside the DB, which sounds messy and painful to support. Clients could make use of it by periodically calling GetLatestSequenceNumber(), noting the timestamp, doing some calculation and figuring out by how much we need to advance the cutoff seqnum. - Compaction codepath in compaction_iterator.cc has been modified to avoid dropping tombstones with seqnum > cutoff seqnum. Iterator changes: - couple params added to ReadOptions, to optionally allow client to request internal keys instead of user keys (so that client can get the latest value of a key, be it delete marker or a put), as well as min timestamp and min seqnum. TableCache changes: - I modified table_cache code to be able to quickly exclude SST files from iterators heep if creation_time on the file is less then iter_start_ts as passed in ReadOptions. That would help a lot in some DB settings (like reading very recent data only or using FIFO compactions), but not so much for universal compaction with more or less long iterator time span. What's left: - Still looking at how to best plug that inside DBIter codepath. So far it seems that FindNextUserKeyInternal only parses values as UserKeys, and iter->key() call generally returns user key. Can we add new API to DBIter as internal_key(), and modify this internal method to optionally set saved_key_ to point to the full internal key? I don't need to store actual seqnum there, but I do need to store type. Closes https://github.com/facebook/rocksdb/pull/2999 Differential Revision: D6175602 Pulled By: mikhail-antonov fbshipit-source-id: c779a6696ee2d574d86c69cec866a3ae095aa900
7 years ago
preserve_deletes_seqnum_(0),
mock_table_factory_(new mock::MockTableFactory()),
Auto recovery from out of space errors (#4164) Summary: This commit implements automatic recovery from a Status::NoSpace() error during background operations such as write callback, flush and compaction. The broad design is as follows - 1. Compaction errors are treated as soft errors and don't put the database in read-only mode. A compaction is delayed until enough free disk space is available to accomodate the compaction outputs, which is estimated based on the input size. This means that users can continue to write, and we rely on the WriteController to delay or stop writes if the compaction debt becomes too high due to persistent low disk space condition 2. Errors during write callback and flush are treated as hard errors, i.e the database is put in read-only mode and goes back to read-write only fater certain recovery actions are taken. 3. Both types of recovery rely on the SstFileManagerImpl to poll for sufficient disk space. We assume that there is a 1-1 mapping between an SFM and the underlying OS storage container. For cases where multiple DBs are hosted on a single storage container, the user is expected to allocate a single SFM instance and use the same one for all the DBs. If no SFM is specified by the user, DBImpl::Open() will allocate one, but this will be one per DB and each DB will recover independently. The recovery implemented by SFM is as follows - a) On the first occurance of an out of space error during compaction, subsequent compactions will be delayed until the disk free space check indicates enough available space. The required space is computed as the sum of input sizes. b) The free space check requirement will be removed once the amount of free space is greater than the size reserved by in progress compactions when the first error occured c) If the out of space error is a hard error, a background thread in SFM will poll for sufficient headroom before triggering the recovery of the database and putting it in write-only mode. The headroom is calculated as the sum of the write_buffer_size of all the DB instances associated with the SFM 4. EventListener callbacks will be called at the start and completion of automatic recovery. Users can disable the auto recov ery in the start callback, and later initiate it manually by calling DB::Resume() Todo: 1. More extensive testing 2. Add disk full condition to db_stress (follow-on PR) Pull Request resolved: https://github.com/facebook/rocksdb/pull/4164 Differential Revision: D9846378 Pulled By: anand1976 fbshipit-source-id: 80ea875dbd7f00205e19c82215ff6e37da10da4a
6 years ago
error_handler_(nullptr, db_options_, &mutex_) {
rocksdb: Replace ASSERT* with EXPECT* in functions that does not return void value Summary: gtest does not use exceptions to fail a unit test by design, and `ASSERT*`s are implemented using `return`. As a consequence we cannot use `ASSERT*` in a function that does not return `void` value ([[ https://code.google.com/p/googletest/wiki/AdvancedGuide#Assertion_Placement | 1]]), and have to fix our existing code. This diff does this in a generic way, with no manual changes. In order to detect all existing `ASSERT*` that are used in functions that doesn't return void value, I change the code to generate compile errors for such cases. In `util/testharness.h` I defined `EXPECT*` assertions, the same way as `ASSERT*`, and redefined `ASSERT*` to return `void`. Then executed: ```lang=bash % USE_CLANG=1 make all -j55 -k 2> build.log % perl -naF: -e 'print "-- -number=".$F[1]." ".$F[0]."\n" if /: error:/' \ build.log | xargs -L 1 perl -spi -e 's/ASSERT/EXPECT/g if $. == $number' % make format ``` After that I reverted back change to `ASSERT*` in `util/testharness.h`. But preserved introduced `EXPECT*`, which is the same as `ASSERT*`. This will be deleted once switched to gtest. This diff is independent and contains manual changes only in `util/testharness.h`. Test Plan: Make sure all tests are passing. ```lang=bash % USE_CLANG=1 make check ``` Reviewers: igor, lgalanis, sdong, yufei.zhu, rven, meyering Reviewed By: meyering Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D33333
10 years ago
EXPECT_OK(env_->CreateDirIfMissing(dbname_));
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
db_options_.env = env_;
db_options_.fs = fs_;
db_options_.db_paths.emplace_back(dbname_,
std::numeric_limits<uint64_t>::max());
}
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());
}
static std::string KeyStr(const std::string& user_key,
const SequenceNumber seq_num, const ValueType t) {
return InternalKey(user_key, seq_num, t).Encode().ToString();
}
static std::string BlobStr(uint64_t blob_file_number, uint64_t offset,
uint64_t size) {
std::string blob_index;
BlobIndex::EncodeBlob(&blob_index, blob_file_number, offset, size,
kNoCompression);
return blob_index;
}
static std::string BlobStrTTL(uint64_t blob_file_number, uint64_t offset,
uint64_t size, uint64_t expiration) {
std::string blob_index;
BlobIndex::EncodeBlobTTL(&blob_index, expiration, blob_file_number, offset,
size, kNoCompression);
return blob_index;
}
static std::string BlobStrInlinedTTL(const Slice& value,
uint64_t expiration) {
std::string blob_index;
BlobIndex::EncodeInlinedTTL(&blob_index, expiration, value);
return blob_index;
}
void AddMockFile(const stl_wrappers::KVMap& contents, int level = 0) {
assert(contents.size() > 0);
bool first_key = true;
std::string smallest, largest;
InternalKey smallest_key, largest_key;
SequenceNumber smallest_seqno = kMaxSequenceNumber;
SequenceNumber largest_seqno = 0;
uint64_t oldest_blob_file_number = kInvalidBlobFileNumber;
for (auto kv : contents) {
ParsedInternalKey key;
std::string skey;
std::string value;
std::tie(skey, value) = kv;
bool parsed = ParseInternalKey(skey, &key);
smallest_seqno = std::min(smallest_seqno, key.sequence);
largest_seqno = std::max(largest_seqno, key.sequence);
if (first_key ||
cfd_->user_comparator()->Compare(key.user_key, smallest) < 0) {
smallest.assign(key.user_key.data(), key.user_key.size());
smallest_key.DecodeFrom(skey);
}
if (first_key ||
cfd_->user_comparator()->Compare(key.user_key, largest) > 0) {
largest.assign(key.user_key.data(), key.user_key.size());
largest_key.DecodeFrom(skey);
}
first_key = false;
if (parsed && key.type == kTypeBlobIndex) {
BlobIndex blob_index;
const Status s = blob_index.DecodeFrom(value);
if (!s.ok()) {
continue;
}
if (blob_index.IsInlined() || blob_index.HasTTL() ||
blob_index.file_number() == kInvalidBlobFileNumber) {
continue;
}
if (oldest_blob_file_number == kInvalidBlobFileNumber ||
oldest_blob_file_number > blob_index.file_number()) {
oldest_blob_file_number = blob_index.file_number();
}
}
}
uint64_t file_number = versions_->NewFileNumber();
EXPECT_OK(mock_table_factory_->CreateMockTable(
env_, GenerateFileName(file_number), std::move(contents)));
VersionEdit edit;
edit.AddFile(level, file_number, 0, 10, smallest_key, largest_key,
smallest_seqno, largest_seqno, false, oldest_blob_file_number,
kUnknownOldestAncesterTime, kUnknownFileCreationTime,
kUnknownFileChecksum, kUnknownFileChecksumFuncName);
mutex_.Lock();
versions_->LogAndApply(versions_->GetColumnFamilySet()->GetDefault(),
mutable_cf_options_, &edit, &mutex_);
mutex_.Unlock();
}
void SetLastSequence(const SequenceNumber sequence_number) {
versions_->SetLastAllocatedSequence(sequence_number + 1);
versions_->SetLastPublishedSequence(sequence_number + 1);
versions_->SetLastSequence(sequence_number + 1);
}
// returns expected result after compaction
stl_wrappers::KVMap CreateTwoFiles(bool gen_corrupted_keys) {
auto expected_results = mock::MakeMockFile();
const int kKeysPerFile = 10000;
const int kCorruptKeysPerFile = 200;
const int kMatchingKeys = kKeysPerFile / 2;
SequenceNumber sequence_number = 0;
auto corrupt_id = [&](int id) {
return gen_corrupted_keys && id > 0 && id <= kCorruptKeysPerFile;
};
for (int i = 0; i < 2; ++i) {
auto contents = mock::MakeMockFile();
for (int k = 0; k < kKeysPerFile; ++k) {
auto key = ToString(i * kMatchingKeys + k);
auto value = ToString(i * kKeysPerFile + k);
InternalKey internal_key(key, ++sequence_number, kTypeValue);
Make Compaction class easier to use Summary: The goal of this diff is to make Compaction class easier to use. This should also make new compaction algorithms easier to write (like CompactFiles from @yhchiang and dynamic leveled and multi-leveled universal from @sdong). Here are couple of things demonstrating that Compaction class is hard to use: 1. we have two constructors of Compaction class 2. there's this thing called grandparents_, but it appears to only be setup for leveled compaction and not compactfiles 3. it's easy to introduce a subtle and dangerous bug like this: D36225 4. SetupBottomMostLevel() is hard to understand and it shouldn't be. See this comment: https://github.com/facebook/rocksdb/blob/afbafeaeaebfd27a0f3e992fee8e0c57d07658fa/db/compaction.cc#L236-L241. It also made it harder for @yhchiang to write CompactFiles, as evidenced by this: https://github.com/facebook/rocksdb/blob/afbafeaeaebfd27a0f3e992fee8e0c57d07658fa/db/compaction_picker.cc#L204-L210 The problem is that we create Compaction object, which holds a lot of state, and then pass it around to some functions. After those functions are done mutating, then we call couple of functions on Compaction object, like SetupBottommostLevel() and MarkFilesBeingCompacted(). It is very hard to see what's happening with all that Compaction's state while it's travelling across different functions. If you're writing a new PickCompaction() function you need to try really hard to understand what are all the functions you need to run on Compaction object and what state you need to setup. My proposed solution is to make important parts of Compaction immutable after construction. PickCompaction() should calculate compaction inputs and then pass them onto Compaction object once they are finalized. That makes it easy to create a new compaction -- just provide all the parameters to the constructor and you're done. No need to call confusing functions after you created your object. This diff doesn't fully achieve that goal, but it comes pretty close. Here are some of the changes: * have one Compaction constructor instead of two. * inputs_ is constant after construction * MarkFilesBeingCompacted() is now private to Compaction class and automatically called on construction/destruction. * SetupBottommostLevel() is gone. Compaction figures it out on its own based on the input. * CompactionPicker's functions are not passing around Compaction object anymore. They are only passing around the state that they need. Test Plan: make check make asan_check make valgrind_check Reviewers: rven, anthony, sdong, yhchiang Reviewed By: yhchiang Subscribers: sdong, yhchiang, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D36687
10 years ago
// This is how the key will look like once it's written in bottommost
// file
InternalKey bottommost_internal_key(
key, 0, kTypeValue);
if (corrupt_id(k)) {
test::CorruptKeyType(&internal_key);
test::CorruptKeyType(&bottommost_internal_key);
}
contents.insert({ internal_key.Encode().ToString(), value });
if (i == 1 || k < kMatchingKeys || corrupt_id(k - kMatchingKeys)) {
expected_results.insert(
{ bottommost_internal_key.Encode().ToString(), value });
}
}
AddMockFile(contents);
}
SetLastSequence(sequence_number);
return expected_results;
}
void NewDB() {
DestroyDB(dbname_, Options());
EXPECT_OK(env_->CreateDirIfMissing(dbname_));
versions_.reset(new VersionSet(dbname_, &db_options_, env_options_,
table_cache_.get(), &write_buffer_manager_,
&write_controller_,
/*block_cache_tracer=*/nullptr));
compaction_job_stats_.Reset();
SetIdentityFile(env_, dbname_);
VersionEdit new_db;
if (db_options_.write_dbid_to_manifest) {
DBImpl* impl = new DBImpl(DBOptions(), dbname_);
std::string db_id;
impl->GetDbIdentityFromIdentityFile(&db_id);
new_db.SetDBId(db_id);
}
new_db.SetLogNumber(0);
new_db.SetNextFile(2);
new_db.SetLastSequence(0);
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, env_options_));
{
log::Writer log(std::move(file_writer), 0, false);
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);
std::vector<ColumnFamilyDescriptor> column_families;
cf_options_.table_factory = mock_table_factory_;
cf_options_.merge_operator = merge_op_;
cf_options_.compaction_filter = compaction_filter_.get();
column_families.emplace_back(kDefaultColumnFamilyName, cf_options_);
EXPECT_OK(versions_->Recover(column_families, false));
cfd_ = versions_->GetColumnFamilySet()->GetDefault();
}
void RunCompaction(
const std::vector<std::vector<FileMetaData*>>& input_files,
const stl_wrappers::KVMap& expected_results,
const std::vector<SequenceNumber>& snapshots = {},
SequenceNumber earliest_write_conflict_snapshot = kMaxSequenceNumber,
int output_level = 1, bool verify = true,
uint64_t expected_oldest_blob_file_number = kInvalidBlobFileNumber) {
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
size_t num_input_files = 0;
std::vector<CompactionInputFiles> compaction_input_files;
for (size_t level = 0; level < input_files.size(); level++) {
auto level_files = input_files[level];
CompactionInputFiles compaction_level;
compaction_level.level = static_cast<int>(level);
compaction_level.files.insert(compaction_level.files.end(),
level_files.begin(), level_files.end());
compaction_input_files.push_back(compaction_level);
num_input_files += level_files.size();
}
Compaction compaction(cfd->current()->storage_info(), *cfd->ioptions(),
*cfd->GetLatestMutableCFOptions(),
compaction_input_files, output_level, 1024 * 1024,
10 * 1024 * 1024, 0, kNoCompression,
cfd->ioptions()->compression_opts, 0, {}, true);
compaction.SetInputVersion(cfd->current());
LogBuffer log_buffer(InfoLogLevel::INFO_LEVEL, db_options_.info_log.get());
mutex_.Lock();
EventLogger event_logger(db_options_.info_log.get());
// TODO(yiwu) add a mock snapshot checker and add test for it.
SnapshotChecker* snapshot_checker = nullptr;
CompactionJob compaction_job(
0, &compaction, db_options_, env_options_, versions_.get(),
&shutting_down_, preserve_deletes_seqnum_, &log_buffer, nullptr,
nullptr, nullptr, &mutex_, &error_handler_, snapshots,
earliest_write_conflict_snapshot, snapshot_checker, table_cache_,
&event_logger, false, false, dbname_, &compaction_job_stats_,
Env::Priority::USER);
VerifyInitializationOfCompactionJobStats(compaction_job_stats_);
compaction_job.Prepare();
mutex_.Unlock();
Status s;
s = compaction_job.Run();
ASSERT_OK(s);
mutex_.Lock();
ASSERT_OK(compaction_job.Install(*cfd->GetLatestMutableCFOptions()));
mutex_.Unlock();
if (verify) {
ASSERT_GE(compaction_job_stats_.elapsed_micros, 0U);
ASSERT_EQ(compaction_job_stats_.num_input_files, num_input_files);
if (expected_results.empty()) {
ASSERT_EQ(compaction_job_stats_.num_output_files, 0U);
} else {
ASSERT_EQ(compaction_job_stats_.num_output_files, 1U);
mock_table_factory_->AssertLatestFile(expected_results);
auto output_files =
cfd->current()->storage_info()->LevelFiles(output_level);
ASSERT_EQ(output_files.size(), 1);
ASSERT_EQ(output_files[0]->oldest_blob_file_number,
expected_oldest_blob_file_number);
}
}
}
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_;
EnvOptions env_options_;
ImmutableDBOptions db_options_;
ColumnFamilyOptions cf_options_;
MutableCFOptions mutable_cf_options_;
std::shared_ptr<Cache> table_cache_;
WriteController write_controller_;
WriteBufferManager write_buffer_manager_;
std::unique_ptr<VersionSet> versions_;
InstrumentedMutex mutex_;
std::atomic<bool> shutting_down_;
Added support for differential snapshots Summary: The motivation for this PR is to add to RocksDB support for differential (incremental) snapshots, as snapshot of the DB changes between two points in time (one can think of it as diff between to sequence numbers, or the diff D which can be thought of as an SST file or just set of KVs that can be applied to sequence number S1 to get the database to the state at sequence number S2). This feature would be useful for various distributed storages layers built on top of RocksDB, as it should help reduce resources (time and network bandwidth) needed to recover and rebuilt DB instances as replicas in the context of distributed storages. From the API standpoint that would like client app requesting iterator between (start seqnum) and current DB state, and reading the "diff". This is a very draft PR for initial review in the discussion on the approach, i'm going to rework some parts and keep updating the PR. For now, what's done here according to initial discussions: Preserving deletes: - We want to be able to optionally preserve recent deletes for some defined period of time, so that if a delete came in recently and might need to be included in the next incremental snapshot it would't get dropped by a compaction. This is done by adding new param to Options (preserve deletes flag) and new variable to DB Impl where we keep track of the sequence number after which we don't want to drop tombstones, even if they are otherwise eligible for deletion. - I also added a new API call for clients to be able to advance this cutoff seqnum after which we drop deletes; i assume it's more flexible to let clients control this, since otherwise we'd need to keep some kind of timestamp < -- > seqnum mapping inside the DB, which sounds messy and painful to support. Clients could make use of it by periodically calling GetLatestSequenceNumber(), noting the timestamp, doing some calculation and figuring out by how much we need to advance the cutoff seqnum. - Compaction codepath in compaction_iterator.cc has been modified to avoid dropping tombstones with seqnum > cutoff seqnum. Iterator changes: - couple params added to ReadOptions, to optionally allow client to request internal keys instead of user keys (so that client can get the latest value of a key, be it delete marker or a put), as well as min timestamp and min seqnum. TableCache changes: - I modified table_cache code to be able to quickly exclude SST files from iterators heep if creation_time on the file is less then iter_start_ts as passed in ReadOptions. That would help a lot in some DB settings (like reading very recent data only or using FIFO compactions), but not so much for universal compaction with more or less long iterator time span. What's left: - Still looking at how to best plug that inside DBIter codepath. So far it seems that FindNextUserKeyInternal only parses values as UserKeys, and iter->key() call generally returns user key. Can we add new API to DBIter as internal_key(), and modify this internal method to optionally set saved_key_ to point to the full internal key? I don't need to store actual seqnum there, but I do need to store type. Closes https://github.com/facebook/rocksdb/pull/2999 Differential Revision: D6175602 Pulled By: mikhail-antonov fbshipit-source-id: c779a6696ee2d574d86c69cec866a3ae095aa900
7 years ago
SequenceNumber preserve_deletes_seqnum_;
std::shared_ptr<mock::MockTableFactory> mock_table_factory_;
CompactionJobStats compaction_job_stats_;
ColumnFamilyData* cfd_;
std::unique_ptr<CompactionFilter> compaction_filter_;
std::shared_ptr<MergeOperator> merge_op_;
ErrorHandler error_handler_;
};
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(CompactionJobTest, Simple) {
NewDB();
auto expected_results = CreateTwoFiles(false);
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
auto files = cfd->current()->storage_info()->LevelFiles(0);
ASSERT_EQ(2U, files.size());
RunCompaction({ files }, expected_results);
}
TEST_F(CompactionJobTest, SimpleCorrupted) {
NewDB();
auto expected_results = CreateTwoFiles(true);
auto cfd = versions_->GetColumnFamilySet()->GetDefault();
auto files = cfd->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
ASSERT_EQ(compaction_job_stats_.num_corrupt_keys, 400U);
}
TEST_F(CompactionJobTest, SimpleDeletion) {
NewDB();
auto file1 = mock::MakeMockFile({{KeyStr("c", 4U, kTypeDeletion), ""},
{KeyStr("c", 3U, kTypeValue), "val"}});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({{KeyStr("b", 2U, kTypeValue), "val"},
{KeyStr("b", 1U, kTypeValue), "val"}});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{KeyStr("b", 0U, kTypeValue), "val"}});
SetLastSequence(4U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, OutputNothing) {
NewDB();
auto file1 = mock::MakeMockFile({{KeyStr("a", 1U, kTypeValue), "val"}});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({{KeyStr("a", 2U, kTypeDeletion), ""}});
AddMockFile(file2);
auto expected_results = mock::MakeMockFile();
SetLastSequence(4U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, SimpleOverwrite) {
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("a", 3U, kTypeValue), "val2"},
{KeyStr("b", 4U, kTypeValue), "val3"},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({{KeyStr("a", 1U, kTypeValue), "val"},
{KeyStr("b", 2U, kTypeValue), "val"}});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 0U, kTypeValue), "val2"},
{KeyStr("b", 0U, kTypeValue), "val3"}});
SetLastSequence(4U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, SimpleNonLastLevel) {
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("a", 5U, kTypeValue), "val2"},
{KeyStr("b", 6U, kTypeValue), "val3"},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({{KeyStr("a", 3U, kTypeValue), "val"},
{KeyStr("b", 4U, kTypeValue), "val"}});
AddMockFile(file2, 1);
auto file3 = mock::MakeMockFile({{KeyStr("a", 1U, kTypeValue), "val"},
{KeyStr("b", 2U, kTypeValue), "val"}});
AddMockFile(file3, 2);
// Because level 1 is not the last level, the sequence numbers of a and b
// cannot be set to 0
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 5U, kTypeValue), "val2"},
{KeyStr("b", 6U, kTypeValue), "val3"}});
SetLastSequence(6U);
auto lvl0_files = cfd_->current()->storage_info()->LevelFiles(0);
auto lvl1_files = cfd_->current()->storage_info()->LevelFiles(1);
RunCompaction({lvl0_files, lvl1_files}, expected_results);
}
TEST_F(CompactionJobTest, SimpleMerge) {
merge_op_ = MergeOperators::CreateStringAppendOperator();
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("a", 5U, kTypeMerge), "5"},
{KeyStr("a", 4U, kTypeMerge), "4"},
{KeyStr("a", 3U, kTypeValue), "3"},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile(
{{KeyStr("b", 2U, kTypeMerge), "2"}, {KeyStr("b", 1U, kTypeValue), "1"}});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 0U, kTypeValue), "3,4,5"},
{KeyStr("b", 0U, kTypeValue), "1,2"}});
SetLastSequence(5U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, NonAssocMerge) {
merge_op_ = MergeOperators::CreateStringAppendTESTOperator();
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("a", 5U, kTypeMerge), "5"},
{KeyStr("a", 4U, kTypeMerge), "4"},
{KeyStr("a", 3U, kTypeMerge), "3"},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile(
{{KeyStr("b", 2U, kTypeMerge), "2"}, {KeyStr("b", 1U, kTypeMerge), "1"}});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 0U, kTypeValue), "3,4,5"},
{KeyStr("b", 0U, kTypeValue), "1,2"}});
SetLastSequence(5U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
// Filters merge operands with value 10.
TEST_F(CompactionJobTest, MergeOperandFilter) {
merge_op_ = MergeOperators::CreateUInt64AddOperator();
compaction_filter_.reset(new test::FilterNumber(10U));
NewDB();
auto file1 = mock::MakeMockFile(
{{KeyStr("a", 5U, kTypeMerge), test::EncodeInt(5U)},
{KeyStr("a", 4U, kTypeMerge), test::EncodeInt(10U)}, // Filtered
{KeyStr("a", 3U, kTypeMerge), test::EncodeInt(3U)}});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({
{KeyStr("b", 2U, kTypeMerge), test::EncodeInt(2U)},
{KeyStr("b", 1U, kTypeMerge), test::EncodeInt(10U)} // Filtered
});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 0U, kTypeValue), test::EncodeInt(8U)},
{KeyStr("b", 0U, kTypeValue), test::EncodeInt(2U)}});
SetLastSequence(5U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, FilterSomeMergeOperands) {
merge_op_ = MergeOperators::CreateUInt64AddOperator();
compaction_filter_.reset(new test::FilterNumber(10U));
NewDB();
auto file1 = mock::MakeMockFile(
{{KeyStr("a", 5U, kTypeMerge), test::EncodeInt(5U)},
{KeyStr("a", 4U, kTypeMerge), test::EncodeInt(10U)}, // Filtered
{KeyStr("a", 3U, kTypeValue), test::EncodeInt(5U)},
{KeyStr("d", 8U, kTypeMerge), test::EncodeInt(10U)}});
AddMockFile(file1);
auto file2 =
mock::MakeMockFile({{KeyStr("b", 2U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 1U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("c", 2U, kTypeMerge), test::EncodeInt(3U)},
{KeyStr("c", 1U, kTypeValue), test::EncodeInt(7U)},
{KeyStr("d", 1U, kTypeValue), test::EncodeInt(6U)}});
AddMockFile(file2);
auto file3 =
mock::MakeMockFile({{KeyStr("a", 1U, kTypeMerge), test::EncodeInt(3U)}});
AddMockFile(file3, 2);
auto expected_results = mock::MakeMockFile({
{KeyStr("a", 5U, kTypeValue), test::EncodeInt(10U)},
{KeyStr("c", 2U, kTypeValue), test::EncodeInt(10U)},
{KeyStr("d", 1U, kTypeValue), test::EncodeInt(6U)}
// b does not appear because the operands are filtered
});
SetLastSequence(5U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
// Test where all operands/merge results are filtered out.
TEST_F(CompactionJobTest, FilterAllMergeOperands) {
merge_op_ = MergeOperators::CreateUInt64AddOperator();
compaction_filter_.reset(new test::FilterNumber(10U));
NewDB();
auto file1 =
mock::MakeMockFile({{KeyStr("a", 11U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("a", 10U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("a", 9U, kTypeMerge), test::EncodeInt(10U)}});
AddMockFile(file1);
auto file2 =
mock::MakeMockFile({{KeyStr("b", 8U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 7U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 6U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 5U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 4U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 3U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 2U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("c", 2U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("c", 1U, kTypeMerge), test::EncodeInt(10U)}});
AddMockFile(file2);
auto file3 =
mock::MakeMockFile({{KeyStr("a", 2U, kTypeMerge), test::EncodeInt(10U)},
{KeyStr("b", 1U, kTypeMerge), test::EncodeInt(10U)}});
AddMockFile(file3, 2);
SetLastSequence(11U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
stl_wrappers::KVMap empty_map;
RunCompaction({files}, empty_map);
}
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
TEST_F(CompactionJobTest, SimpleSingleDelete) {
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("a", 5U, kTypeDeletion), ""},
{KeyStr("b", 6U, kTypeSingleDeletion), ""},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({{KeyStr("a", 3U, kTypeValue), "val"},
{KeyStr("b", 4U, kTypeValue), "val"}});
AddMockFile(file2);
auto file3 = mock::MakeMockFile({
{KeyStr("a", 1U, kTypeValue), "val"},
});
AddMockFile(file3, 2);
auto expected_results =
mock::MakeMockFile({{KeyStr("a", 5U, kTypeDeletion), ""}});
SetLastSequence(6U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, SingleDeleteSnapshots) {
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("A", 12U, kTypeSingleDeletion), ""},
{KeyStr("a", 12U, kTypeSingleDeletion), ""},
{KeyStr("b", 21U, kTypeSingleDeletion), ""},
{KeyStr("c", 22U, kTypeSingleDeletion), ""},
{KeyStr("d", 9U, kTypeSingleDeletion), ""},
{KeyStr("f", 21U, kTypeSingleDeletion), ""},
{KeyStr("j", 11U, kTypeSingleDeletion), ""},
{KeyStr("j", 9U, kTypeSingleDeletion), ""},
{KeyStr("k", 12U, kTypeSingleDeletion), ""},
{KeyStr("k", 11U, kTypeSingleDeletion), ""},
{KeyStr("l", 3U, kTypeSingleDeletion), ""},
{KeyStr("l", 2U, kTypeSingleDeletion), ""},
});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
AddMockFile(file1);
auto file2 = mock::MakeMockFile({
{KeyStr("0", 2U, kTypeSingleDeletion), ""},
{KeyStr("a", 11U, kTypeValue), "val1"},
{KeyStr("b", 11U, kTypeValue), "val2"},
{KeyStr("c", 21U, kTypeValue), "val3"},
{KeyStr("d", 8U, kTypeValue), "val4"},
{KeyStr("e", 2U, kTypeSingleDeletion), ""},
{KeyStr("f", 1U, kTypeValue), "val1"},
{KeyStr("g", 11U, kTypeSingleDeletion), ""},
{KeyStr("h", 2U, kTypeSingleDeletion), ""},
{KeyStr("m", 12U, kTypeValue), "val1"},
{KeyStr("m", 11U, kTypeSingleDeletion), ""},
{KeyStr("m", 8U, kTypeValue), "val2"},
});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
AddMockFile(file2);
auto file3 = mock::MakeMockFile({
{KeyStr("A", 1U, kTypeValue), "val"},
{KeyStr("e", 1U, kTypeValue), "val"},
});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
AddMockFile(file3, 2);
auto expected_results = mock::MakeMockFile({
{KeyStr("A", 12U, kTypeSingleDeletion), ""},
{KeyStr("a", 12U, kTypeSingleDeletion), ""},
{KeyStr("a", 11U, kTypeValue), ""},
{KeyStr("b", 21U, kTypeSingleDeletion), ""},
{KeyStr("b", 11U, kTypeValue), "val2"},
{KeyStr("c", 22U, kTypeSingleDeletion), ""},
{KeyStr("c", 21U, kTypeValue), ""},
{KeyStr("e", 2U, kTypeSingleDeletion), ""},
{KeyStr("f", 21U, kTypeSingleDeletion), ""},
{KeyStr("f", 1U, kTypeValue), "val1"},
{KeyStr("g", 11U, kTypeSingleDeletion), ""},
{KeyStr("j", 11U, kTypeSingleDeletion), ""},
{KeyStr("k", 11U, kTypeSingleDeletion), ""},
{KeyStr("m", 12U, kTypeValue), "val1"},
{KeyStr("m", 11U, kTypeSingleDeletion), ""},
{KeyStr("m", 8U, kTypeValue), "val2"},
});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
SetLastSequence(22U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results, {10U, 20U}, 10U);
}
TEST_F(CompactionJobTest, EarliestWriteConflictSnapshot) {
NewDB();
// Test multiple snapshots where the earliest snapshot is not a
// write-conflic-snapshot.
auto file1 = mock::MakeMockFile({
{KeyStr("A", 24U, kTypeSingleDeletion), ""},
{KeyStr("A", 23U, kTypeValue), "val"},
{KeyStr("B", 24U, kTypeSingleDeletion), ""},
{KeyStr("B", 23U, kTypeValue), "val"},
{KeyStr("D", 24U, kTypeSingleDeletion), ""},
{KeyStr("G", 32U, kTypeSingleDeletion), ""},
{KeyStr("G", 31U, kTypeValue), "val"},
{KeyStr("G", 24U, kTypeSingleDeletion), ""},
{KeyStr("G", 23U, kTypeValue), "val2"},
{KeyStr("H", 31U, kTypeValue), "val"},
{KeyStr("H", 24U, kTypeSingleDeletion), ""},
{KeyStr("H", 23U, kTypeValue), "val"},
{KeyStr("I", 35U, kTypeSingleDeletion), ""},
{KeyStr("I", 34U, kTypeValue), "val2"},
{KeyStr("I", 33U, kTypeSingleDeletion), ""},
{KeyStr("I", 32U, kTypeValue), "val3"},
{KeyStr("I", 31U, kTypeSingleDeletion), ""},
{KeyStr("J", 34U, kTypeValue), "val"},
{KeyStr("J", 33U, kTypeSingleDeletion), ""},
{KeyStr("J", 25U, kTypeValue), "val2"},
{KeyStr("J", 24U, kTypeSingleDeletion), ""},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({
{KeyStr("A", 14U, kTypeSingleDeletion), ""},
{KeyStr("A", 13U, kTypeValue), "val2"},
{KeyStr("C", 14U, kTypeSingleDeletion), ""},
{KeyStr("C", 13U, kTypeValue), "val"},
{KeyStr("E", 12U, kTypeSingleDeletion), ""},
{KeyStr("F", 4U, kTypeSingleDeletion), ""},
{KeyStr("F", 3U, kTypeValue), "val"},
{KeyStr("G", 14U, kTypeSingleDeletion), ""},
{KeyStr("G", 13U, kTypeValue), "val3"},
{KeyStr("H", 14U, kTypeSingleDeletion), ""},
{KeyStr("H", 13U, kTypeValue), "val2"},
{KeyStr("I", 13U, kTypeValue), "val4"},
{KeyStr("I", 12U, kTypeSingleDeletion), ""},
{KeyStr("I", 11U, kTypeValue), "val5"},
{KeyStr("J", 15U, kTypeValue), "val3"},
{KeyStr("J", 14U, kTypeSingleDeletion), ""},
});
AddMockFile(file2);
auto expected_results = mock::MakeMockFile({
{KeyStr("A", 24U, kTypeSingleDeletion), ""},
{KeyStr("A", 23U, kTypeValue), ""},
{KeyStr("B", 24U, kTypeSingleDeletion), ""},
{KeyStr("B", 23U, kTypeValue), ""},
{KeyStr("D", 24U, kTypeSingleDeletion), ""},
{KeyStr("E", 12U, kTypeSingleDeletion), ""},
{KeyStr("G", 32U, kTypeSingleDeletion), ""},
{KeyStr("G", 31U, kTypeValue), ""},
{KeyStr("H", 31U, kTypeValue), "val"},
{KeyStr("I", 35U, kTypeSingleDeletion), ""},
{KeyStr("I", 34U, kTypeValue), ""},
{KeyStr("I", 31U, kTypeSingleDeletion), ""},
{KeyStr("I", 13U, kTypeValue), "val4"},
{KeyStr("J", 34U, kTypeValue), "val"},
{KeyStr("J", 33U, kTypeSingleDeletion), ""},
{KeyStr("J", 25U, kTypeValue), "val2"},
{KeyStr("J", 24U, kTypeSingleDeletion), ""},
{KeyStr("J", 15U, kTypeValue), "val3"},
{KeyStr("J", 14U, kTypeSingleDeletion), ""},
});
SetLastSequence(24U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results, {10U, 20U, 30U}, 20U);
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
}
TEST_F(CompactionJobTest, SingleDeleteZeroSeq) {
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("A", 10U, kTypeSingleDeletion), ""},
{KeyStr("dummy", 5U, kTypeValue), "val2"},
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({
{KeyStr("A", 0U, kTypeValue), "val"},
});
AddMockFile(file2);
auto expected_results = mock::MakeMockFile({
{KeyStr("dummy", 0U, kTypeValue), "val2"},
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
});
SetLastSequence(22U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results, {});
}
TEST_F(CompactionJobTest, MultiSingleDelete) {
// Tests three scenarios involving multiple single delete/put pairs:
//
// A: Put Snapshot SDel Put SDel -> Put Snapshot SDel
// B: Snapshot Put SDel Put SDel Snapshot -> Snapshot SDel Snapshot
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
// C: SDel Put SDel Snapshot Put -> Snapshot Put
// D: (Put) SDel Snapshot Put SDel -> (Put) SDel Snapshot SDel
// E: Put SDel Snapshot Put SDel -> Snapshot SDel
// F: Put SDel Put Sdel Snapshot -> removed
// G: Snapshot SDel Put SDel Put -> Snapshot Put SDel
// H: (Put) Put SDel Put Sdel Snapshot -> Removed
// I: (Put) Snapshot Put SDel Put SDel -> SDel
// J: Put Put SDel Put SDel SDel Snapshot Put Put SDel SDel Put
// -> Snapshot Put
// K: SDel SDel Put SDel Put Put Snapshot SDel Put SDel SDel Put SDel
// -> Snapshot Put Snapshot SDel
// L: SDel Put Del Put SDel Snapshot Del Put Del SDel Put SDel
// -> Snapshot SDel
// M: (Put) SDel Put Del Put SDel Snapshot Put Del SDel Put SDel Del
// -> SDel Snapshot Del
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
NewDB();
auto file1 = mock::MakeMockFile({
{KeyStr("A", 14U, kTypeSingleDeletion), ""},
{KeyStr("A", 13U, kTypeValue), "val5"},
{KeyStr("A", 12U, kTypeSingleDeletion), ""},
{KeyStr("B", 14U, kTypeSingleDeletion), ""},
{KeyStr("B", 13U, kTypeValue), "val2"},
{KeyStr("C", 14U, kTypeValue), "val3"},
{KeyStr("D", 12U, kTypeSingleDeletion), ""},
{KeyStr("D", 11U, kTypeValue), "val4"},
{KeyStr("G", 15U, kTypeValue), "val"},
{KeyStr("G", 14U, kTypeSingleDeletion), ""},
{KeyStr("G", 13U, kTypeValue), "val"},
{KeyStr("I", 14U, kTypeSingleDeletion), ""},
{KeyStr("I", 13U, kTypeValue), "val"},
{KeyStr("J", 15U, kTypeValue), "val"},
{KeyStr("J", 14U, kTypeSingleDeletion), ""},
{KeyStr("J", 13U, kTypeSingleDeletion), ""},
{KeyStr("J", 12U, kTypeValue), "val"},
{KeyStr("J", 11U, kTypeValue), "val"},
{KeyStr("K", 16U, kTypeSingleDeletion), ""},
{KeyStr("K", 15U, kTypeValue), "val1"},
{KeyStr("K", 14U, kTypeSingleDeletion), ""},
{KeyStr("K", 13U, kTypeSingleDeletion), ""},
{KeyStr("K", 12U, kTypeValue), "val2"},
{KeyStr("K", 11U, kTypeSingleDeletion), ""},
{KeyStr("L", 16U, kTypeSingleDeletion), ""},
{KeyStr("L", 15U, kTypeValue), "val"},
{KeyStr("L", 14U, kTypeSingleDeletion), ""},
{KeyStr("L", 13U, kTypeDeletion), ""},
{KeyStr("L", 12U, kTypeValue), "val"},
{KeyStr("L", 11U, kTypeDeletion), ""},
{KeyStr("M", 16U, kTypeDeletion), ""},
{KeyStr("M", 15U, kTypeSingleDeletion), ""},
{KeyStr("M", 14U, kTypeValue), "val"},
{KeyStr("M", 13U, kTypeSingleDeletion), ""},
{KeyStr("M", 12U, kTypeDeletion), ""},
{KeyStr("M", 11U, kTypeValue), "val"},
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
});
AddMockFile(file1);
auto file2 = mock::MakeMockFile({
{KeyStr("A", 10U, kTypeValue), "val"},
{KeyStr("B", 12U, kTypeSingleDeletion), ""},
{KeyStr("B", 11U, kTypeValue), "val2"},
{KeyStr("C", 10U, kTypeSingleDeletion), ""},
{KeyStr("C", 9U, kTypeValue), "val6"},
{KeyStr("C", 8U, kTypeSingleDeletion), ""},
{KeyStr("D", 10U, kTypeSingleDeletion), ""},
{KeyStr("E", 12U, kTypeSingleDeletion), ""},
{KeyStr("E", 11U, kTypeValue), "val"},
{KeyStr("E", 5U, kTypeSingleDeletion), ""},
{KeyStr("E", 4U, kTypeValue), "val"},
{KeyStr("F", 6U, kTypeSingleDeletion), ""},
{KeyStr("F", 5U, kTypeValue), "val"},
{KeyStr("F", 4U, kTypeSingleDeletion), ""},
{KeyStr("F", 3U, kTypeValue), "val"},
{KeyStr("G", 12U, kTypeSingleDeletion), ""},
{KeyStr("H", 6U, kTypeSingleDeletion), ""},
{KeyStr("H", 5U, kTypeValue), "val"},
{KeyStr("H", 4U, kTypeSingleDeletion), ""},
{KeyStr("H", 3U, kTypeValue), "val"},
{KeyStr("I", 12U, kTypeSingleDeletion), ""},
{KeyStr("I", 11U, kTypeValue), "val"},
{KeyStr("J", 6U, kTypeSingleDeletion), ""},
{KeyStr("J", 5U, kTypeSingleDeletion), ""},
{KeyStr("J", 4U, kTypeValue), "val"},
{KeyStr("J", 3U, kTypeSingleDeletion), ""},
{KeyStr("J", 2U, kTypeValue), "val"},
{KeyStr("K", 8U, kTypeValue), "val3"},
{KeyStr("K", 7U, kTypeValue), "val4"},
{KeyStr("K", 6U, kTypeSingleDeletion), ""},
{KeyStr("K", 5U, kTypeValue), "val5"},
{KeyStr("K", 2U, kTypeSingleDeletion), ""},
{KeyStr("K", 1U, kTypeSingleDeletion), ""},
{KeyStr("L", 5U, kTypeSingleDeletion), ""},
{KeyStr("L", 4U, kTypeValue), "val"},
{KeyStr("L", 3U, kTypeDeletion), ""},
{KeyStr("L", 2U, kTypeValue), "val"},
{KeyStr("L", 1U, kTypeSingleDeletion), ""},
{KeyStr("M", 10U, kTypeSingleDeletion), ""},
{KeyStr("M", 7U, kTypeValue), "val"},
{KeyStr("M", 5U, kTypeDeletion), ""},
{KeyStr("M", 4U, kTypeValue), "val"},
{KeyStr("M", 3U, kTypeSingleDeletion), ""},
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
});
AddMockFile(file2);
auto file3 = mock::MakeMockFile({
{KeyStr("D", 1U, kTypeValue), "val"},
{KeyStr("H", 1U, kTypeValue), "val"},
{KeyStr("I", 2U, kTypeValue), "val"},
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
});
AddMockFile(file3, 2);
auto file4 = mock::MakeMockFile({
{KeyStr("M", 1U, kTypeValue), "val"},
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
});
AddMockFile(file4, 2);
auto expected_results =
mock::MakeMockFile({{KeyStr("A", 14U, kTypeSingleDeletion), ""},
{KeyStr("A", 13U, kTypeValue), ""},
{KeyStr("A", 12U, kTypeSingleDeletion), ""},
{KeyStr("A", 10U, kTypeValue), "val"},
{KeyStr("B", 14U, kTypeSingleDeletion), ""},
{KeyStr("B", 13U, kTypeValue), ""},
{KeyStr("C", 14U, kTypeValue), "val3"},
{KeyStr("D", 12U, kTypeSingleDeletion), ""},
{KeyStr("D", 11U, kTypeValue), ""},
{KeyStr("D", 10U, kTypeSingleDeletion), ""},
{KeyStr("E", 12U, kTypeSingleDeletion), ""},
{KeyStr("E", 11U, kTypeValue), ""},
{KeyStr("G", 15U, kTypeValue), "val"},
{KeyStr("G", 12U, kTypeSingleDeletion), ""},
{KeyStr("I", 14U, kTypeSingleDeletion), ""},
{KeyStr("I", 13U, kTypeValue), ""},
{KeyStr("J", 15U, kTypeValue), "val"},
{KeyStr("K", 16U, kTypeSingleDeletion), ""},
{KeyStr("K", 15U, kTypeValue), ""},
{KeyStr("K", 11U, kTypeSingleDeletion), ""},
{KeyStr("K", 8U, kTypeValue), "val3"},
{KeyStr("L", 16U, kTypeSingleDeletion), ""},
{KeyStr("L", 15U, kTypeValue), ""},
{KeyStr("M", 16U, kTypeDeletion), ""},
{KeyStr("M", 3U, kTypeSingleDeletion), ""}});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
SetLastSequence(22U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results, {10U}, 10U);
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
}
// This test documents the behavior where a corrupt key follows a deletion or a
// single deletion and the (single) deletion gets removed while the corrupt key
// gets written out. TODO(noetzli): We probably want a better way to treat
// corrupt keys.
TEST_F(CompactionJobTest, CorruptionAfterDeletion) {
NewDB();
auto file1 =
mock::MakeMockFile({{test::KeyStr("A", 6U, kTypeValue), "val3"},
{test::KeyStr("a", 5U, kTypeDeletion), ""},
{test::KeyStr("a", 4U, kTypeValue, true), "val"}});
AddMockFile(file1);
auto file2 =
mock::MakeMockFile({{test::KeyStr("b", 3U, kTypeSingleDeletion), ""},
{test::KeyStr("b", 2U, kTypeValue, true), "val"},
{test::KeyStr("c", 1U, kTypeValue), "val2"}});
AddMockFile(file2);
auto expected_results =
mock::MakeMockFile({{test::KeyStr("A", 0U, kTypeValue), "val3"},
{test::KeyStr("a", 0U, kTypeValue, true), "val"},
{test::KeyStr("b", 0U, kTypeValue, true), "val"},
{test::KeyStr("c", 0U, kTypeValue), "val2"}});
Support for SingleDelete() Summary: This patch fixes #7460559. It introduces SingleDelete as a new database operation. This operation can be used to delete keys that were never overwritten (no put following another put of the same key). If an overwritten key is single deleted the behavior is undefined. Single deletion of a non-existent key has no effect but multiple consecutive single deletions are not allowed (see limitations). In contrast to the conventional Delete() operation, the deletion entry is removed along with the value when the two are lined up in a compaction. Note: The semantics are similar to @igor's prototype that allowed to have this behavior on the granularity of a column family ( https://reviews.facebook.net/D42093 ). This new patch, however, is more aggressive when it comes to removing tombstones: It removes the SingleDelete together with the value whenever there is no snapshot between them while the older patch only did this when the sequence number of the deletion was older than the earliest snapshot. Most of the complex additions are in the Compaction Iterator, all other changes should be relatively straightforward. The patch also includes basic support for single deletions in db_stress and db_bench. Limitations: - Not compatible with cuckoo hash tables - Single deletions cannot be used in combination with merges and normal deletions on the same key (other keys are not affected by this) - Consecutive single deletions are currently not allowed (and older version of this patch supported this so it could be resurrected if needed) Test Plan: make all check Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor Reviewed By: igor Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43179
9 years ago
SetLastSequence(6U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results);
}
TEST_F(CompactionJobTest, OldestBlobFileNumber) {
NewDB();
// Note: blob1 is inlined TTL, so it will not be considered for the purposes
// of identifying the oldest referenced blob file. Similarly, blob6 will be
// ignored because it has TTL and hence refers to a TTL blob file.
const stl_wrappers::KVMap::value_type blob1(
KeyStr("a", 1U, kTypeBlobIndex), BlobStrInlinedTTL("foo", 1234567890ULL));
const stl_wrappers::KVMap::value_type blob2(KeyStr("b", 2U, kTypeBlobIndex),
BlobStr(59, 123456, 999));
const stl_wrappers::KVMap::value_type blob3(KeyStr("c", 3U, kTypeBlobIndex),
BlobStr(138, 1000, 1 << 8));
auto file1 = mock::MakeMockFile({blob1, blob2, blob3});
AddMockFile(file1);
const stl_wrappers::KVMap::value_type blob4(KeyStr("d", 4U, kTypeBlobIndex),
BlobStr(199, 3 << 10, 1 << 20));
const stl_wrappers::KVMap::value_type blob5(KeyStr("e", 5U, kTypeBlobIndex),
BlobStr(19, 6789, 333));
const stl_wrappers::KVMap::value_type blob6(
KeyStr("f", 6U, kTypeBlobIndex),
BlobStrTTL(5, 2048, 1 << 7, 1234567890ULL));
auto file2 = mock::MakeMockFile({blob4, blob5, blob6});
AddMockFile(file2);
const stl_wrappers::KVMap::value_type expected_blob1(
KeyStr("a", 0U, kTypeBlobIndex), blob1.second);
const stl_wrappers::KVMap::value_type expected_blob2(
KeyStr("b", 0U, kTypeBlobIndex), blob2.second);
const stl_wrappers::KVMap::value_type expected_blob3(
KeyStr("c", 0U, kTypeBlobIndex), blob3.second);
const stl_wrappers::KVMap::value_type expected_blob4(
KeyStr("d", 0U, kTypeBlobIndex), blob4.second);
const stl_wrappers::KVMap::value_type expected_blob5(
KeyStr("e", 0U, kTypeBlobIndex), blob5.second);
const stl_wrappers::KVMap::value_type expected_blob6(
KeyStr("f", 0U, kTypeBlobIndex), blob6.second);
auto expected_results =
mock::MakeMockFile({expected_blob1, expected_blob2, expected_blob3,
expected_blob4, expected_blob5, expected_blob6});
SetLastSequence(6U);
auto files = cfd_->current()->storage_info()->LevelFiles(0);
RunCompaction({files}, expected_results, std::vector<SequenceNumber>(),
kMaxSequenceNumber, /* output_level */ 1, /* verify */ true,
/* expected_oldest_blob_file_number */ 19);
}
} // 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();
}
#else
#include <stdio.h>
int main(int /*argc*/, char** /*argv*/) {
fprintf(stderr,
"SKIPPED as CompactionJobStats is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // ROCKSDB_LITE