rocksdb/db/db_test_util.h
Anand Ananthabhotla b9d6eccac1 Lock free MultiGet (#4754)
Summary:
Avoid locking the DB mutex in order to reference SuperVersions. Instead, we get the thread local cached SuperVersion for each column family in the list. It depends on finding a sequence number that overlaps with all the open memtables. We start with the latest published sequence number, and if any of the memtables is sealed before we can get all the SuperVersions, the process is repeated. After a few times, give up and lock the DB mutex.

Tests:
1. Unit tests
2. make check
3. db_bench -

TEST_TMPDIR=/dev/shm ./db_bench -use_existing_db=true -benchmarks=readrandom -write_buffer_size=4194304 -target_file_size_base=4194304 -max_bytes_for_level_base=16777216 -num=5000000 -reads=1000000 -threads=32 -compression_type=none -cache_size=1048576000 -batch_size=1 -bloom_bits=1
readrandom   :       0.167 micros/op 5983920 ops/sec;  426.2 MB/s (1000000 of 1000000 found)

Multireadrandom with batch size 1:
multireadrandom :       0.176 micros/op 5684033 ops/sec; (1000000 of 1000000 found)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4754

Differential Revision: D13363550

Pulled By: anand1976

fbshipit-source-id: 6243e8de7dbd9c8bb490a8eca385da0c855b1dd4
2019-01-02 11:42:54 -08:00

982 lines
31 KiB
C++

// 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).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <fcntl.h>
#include <inttypes.h>
#include <algorithm>
#include <map>
#include <set>
#include <string>
#include <thread>
#include <unordered_set>
#include <utility>
#include <vector>
#include "db/db_impl.h"
#include "db/dbformat.h"
#include "env/mock_env.h"
#include "memtable/hash_linklist_rep.h"
#include "rocksdb/cache.h"
#include "rocksdb/compaction_filter.h"
#include "rocksdb/convenience.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/filter_policy.h"
#include "rocksdb/options.h"
#include "rocksdb/slice.h"
#include "rocksdb/sst_file_writer.h"
#include "rocksdb/statistics.h"
#include "rocksdb/table.h"
#include "rocksdb/utilities/checkpoint.h"
#include "table/block_based_table_factory.h"
#include "table/mock_table.h"
#include "table/plain_table_factory.h"
#include "table/scoped_arena_iterator.h"
#include "util/compression.h"
#include "util/filename.h"
#include "util/mock_time_env.h"
#include "util/mutexlock.h"
#include "util/string_util.h"
#include "util/sync_point.h"
#include "util/testharness.h"
#include "util/testutil.h"
#include "utilities/merge_operators.h"
namespace rocksdb {
namespace anon {
class AtomicCounter {
public:
explicit AtomicCounter(Env* env = NULL)
: env_(env), cond_count_(&mu_), count_(0) {}
void Increment() {
MutexLock l(&mu_);
count_++;
cond_count_.SignalAll();
}
int Read() {
MutexLock l(&mu_);
return count_;
}
bool WaitFor(int count) {
MutexLock l(&mu_);
uint64_t start = env_->NowMicros();
while (count_ < count) {
uint64_t now = env_->NowMicros();
cond_count_.TimedWait(now + /*1s*/ 1 * 1000 * 1000);
if (env_->NowMicros() - start > /*10s*/ 10 * 1000 * 1000) {
return false;
}
if (count_ < count) {
GTEST_LOG_(WARNING) << "WaitFor is taking more time than usual";
}
}
return true;
}
void Reset() {
MutexLock l(&mu_);
count_ = 0;
cond_count_.SignalAll();
}
private:
Env* env_;
port::Mutex mu_;
port::CondVar cond_count_;
int count_;
};
struct OptionsOverride {
std::shared_ptr<const FilterPolicy> filter_policy = nullptr;
// These will be used only if filter_policy is set
bool partition_filters = false;
uint64_t metadata_block_size = 1024;
// Used as a bit mask of individual enums in which to skip an XF test point
int skip_policy = 0;
};
} // namespace anon
enum SkipPolicy { kSkipNone = 0, kSkipNoSnapshot = 1, kSkipNoPrefix = 2 };
// A hacky skip list mem table that triggers flush after number of entries.
class SpecialMemTableRep : public MemTableRep {
public:
explicit SpecialMemTableRep(Allocator* allocator, MemTableRep* memtable,
int num_entries_flush)
: MemTableRep(allocator),
memtable_(memtable),
num_entries_flush_(num_entries_flush),
num_entries_(0) {}
virtual KeyHandle Allocate(const size_t len, char** buf) override {
return memtable_->Allocate(len, buf);
}
// Insert key into the list.
// REQUIRES: nothing that compares equal to key is currently in the list.
virtual void Insert(KeyHandle handle) override {
num_entries_++;
memtable_->Insert(handle);
}
// Returns true iff an entry that compares equal to key is in the list.
virtual bool Contains(const char* key) const override {
return memtable_->Contains(key);
}
virtual size_t ApproximateMemoryUsage() override {
// Return a high memory usage when number of entries exceeds the threshold
// to trigger a flush.
return (num_entries_ < num_entries_flush_) ? 0 : 1024 * 1024 * 1024;
}
virtual void Get(const LookupKey& k, void* callback_args,
bool (*callback_func)(void* arg,
const char* entry)) override {
memtable_->Get(k, callback_args, callback_func);
}
uint64_t ApproximateNumEntries(const Slice& start_ikey,
const Slice& end_ikey) override {
return memtable_->ApproximateNumEntries(start_ikey, end_ikey);
}
virtual MemTableRep::Iterator* GetIterator(Arena* arena = nullptr) override {
return memtable_->GetIterator(arena);
}
virtual ~SpecialMemTableRep() override {}
private:
std::unique_ptr<MemTableRep> memtable_;
int num_entries_flush_;
int num_entries_;
};
// The factory for the hacky skip list mem table that triggers flush after
// number of entries exceeds a threshold.
class SpecialSkipListFactory : public MemTableRepFactory {
public:
// After number of inserts exceeds `num_entries_flush` in a mem table, trigger
// flush.
explicit SpecialSkipListFactory(int num_entries_flush)
: num_entries_flush_(num_entries_flush) {}
using MemTableRepFactory::CreateMemTableRep;
virtual MemTableRep* CreateMemTableRep(
const MemTableRep::KeyComparator& compare, Allocator* allocator,
const SliceTransform* transform, Logger* /*logger*/) override {
return new SpecialMemTableRep(
allocator, factory_.CreateMemTableRep(compare, allocator, transform, 0),
num_entries_flush_);
}
virtual const char* Name() const override { return "SkipListFactory"; }
bool IsInsertConcurrentlySupported() const override {
return factory_.IsInsertConcurrentlySupported();
}
private:
SkipListFactory factory_;
int num_entries_flush_;
};
// Special Env used to delay background operations
class SpecialEnv : public EnvWrapper {
public:
explicit SpecialEnv(Env* base);
Status NewWritableFile(const std::string& f, std::unique_ptr<WritableFile>* r,
const EnvOptions& soptions) override {
class SSTableFile : public WritableFile {
private:
SpecialEnv* env_;
std::unique_ptr<WritableFile> base_;
public:
SSTableFile(SpecialEnv* env, std::unique_ptr<WritableFile>&& base)
: env_(env), base_(std::move(base)) {}
Status Append(const Slice& data) override {
if (env_->table_write_callback_) {
(*env_->table_write_callback_)();
}
if (env_->drop_writes_.load(std::memory_order_acquire)) {
// Drop writes on the floor
return Status::OK();
} else if (env_->no_space_.load(std::memory_order_acquire)) {
return Status::NoSpace("No space left on device");
} else {
env_->bytes_written_ += data.size();
return base_->Append(data);
}
}
Status PositionedAppend(const Slice& data, uint64_t offset) override {
if (env_->table_write_callback_) {
(*env_->table_write_callback_)();
}
if (env_->drop_writes_.load(std::memory_order_acquire)) {
// Drop writes on the floor
return Status::OK();
} else if (env_->no_space_.load(std::memory_order_acquire)) {
return Status::NoSpace("No space left on device");
} else {
env_->bytes_written_ += data.size();
return base_->PositionedAppend(data, offset);
}
}
Status Truncate(uint64_t size) override { return base_->Truncate(size); }
Status RangeSync(uint64_t offset, uint64_t nbytes) override {
Status s = base_->RangeSync(offset, nbytes);
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_SYNC_POINT_CALLBACK("SpecialEnv::SStableFile::RangeSync", &s);
#endif // !(defined NDEBUG) || !defined(OS_WIN)
return s;
}
Status Close() override {
// SyncPoint is not supported in Released Windows Mode.
#if !(defined NDEBUG) || !defined(OS_WIN)
// Check preallocation size
// preallocation size is never passed to base file.
size_t preallocation_size = preallocation_block_size();
TEST_SYNC_POINT_CALLBACK("DBTestWritableFile.GetPreallocationStatus",
&preallocation_size);
#endif // !(defined NDEBUG) || !defined(OS_WIN)
Status s = base_->Close();
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_SYNC_POINT_CALLBACK("SpecialEnv::SStableFile::Close", &s);
#endif // !(defined NDEBUG) || !defined(OS_WIN)
return s;
}
Status Flush() override { return base_->Flush(); }
Status Sync() override {
++env_->sync_counter_;
while (env_->delay_sstable_sync_.load(std::memory_order_acquire)) {
env_->SleepForMicroseconds(100000);
}
Status s = base_->Sync();
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_SYNC_POINT_CALLBACK("SpecialEnv::SStableFile::Sync", &s);
#endif // !(defined NDEBUG) || !defined(OS_WIN)
return s;
}
void SetIOPriority(Env::IOPriority pri) override {
base_->SetIOPriority(pri);
}
Env::IOPriority GetIOPriority() override {
return base_->GetIOPriority();
}
bool use_direct_io() const override {
return base_->use_direct_io();
}
Status Allocate(uint64_t offset, uint64_t len) override {
return base_->Allocate(offset, len);
}
};
class ManifestFile : public WritableFile {
public:
ManifestFile(SpecialEnv* env, std::unique_ptr<WritableFile>&& b)
: env_(env), base_(std::move(b)) {}
Status Append(const Slice& data) override {
if (env_->manifest_write_error_.load(std::memory_order_acquire)) {
return Status::IOError("simulated writer error");
} else {
return base_->Append(data);
}
}
Status Truncate(uint64_t size) override { return base_->Truncate(size); }
Status Close() override { return base_->Close(); }
Status Flush() override { return base_->Flush(); }
Status Sync() override {
++env_->sync_counter_;
if (env_->manifest_sync_error_.load(std::memory_order_acquire)) {
return Status::IOError("simulated sync error");
} else {
return base_->Sync();
}
}
uint64_t GetFileSize() override { return base_->GetFileSize(); }
Status Allocate(uint64_t offset, uint64_t len) override {
return base_->Allocate(offset, len);
}
private:
SpecialEnv* env_;
std::unique_ptr<WritableFile> base_;
};
class WalFile : public WritableFile {
public:
WalFile(SpecialEnv* env, std::unique_ptr<WritableFile>&& b)
: env_(env), base_(std::move(b)) {
env_->num_open_wal_file_.fetch_add(1);
}
virtual ~WalFile() { env_->num_open_wal_file_.fetch_add(-1); }
Status Append(const Slice& data) override {
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_SYNC_POINT("SpecialEnv::WalFile::Append:1");
#endif
Status s;
if (env_->log_write_error_.load(std::memory_order_acquire)) {
s = Status::IOError("simulated writer error");
} else {
int slowdown =
env_->log_write_slowdown_.load(std::memory_order_acquire);
if (slowdown > 0) {
env_->SleepForMicroseconds(slowdown);
}
s = base_->Append(data);
}
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_SYNC_POINT("SpecialEnv::WalFile::Append:2");
#endif
return s;
}
Status Truncate(uint64_t size) override { return base_->Truncate(size); }
Status Close() override {
// SyncPoint is not supported in Released Windows Mode.
#if !(defined NDEBUG) || !defined(OS_WIN)
// Check preallocation size
// preallocation size is never passed to base file.
size_t preallocation_size = preallocation_block_size();
TEST_SYNC_POINT_CALLBACK("DBTestWalFile.GetPreallocationStatus",
&preallocation_size);
#endif // !(defined NDEBUG) || !defined(OS_WIN)
return base_->Close();
}
Status Flush() override { return base_->Flush(); }
Status Sync() override {
++env_->sync_counter_;
return base_->Sync();
}
bool IsSyncThreadSafe() const override {
return env_->is_wal_sync_thread_safe_.load();
}
Status Allocate(uint64_t offset, uint64_t len) override {
return base_->Allocate(offset, len);
}
private:
SpecialEnv* env_;
std::unique_ptr<WritableFile> base_;
};
if (non_writeable_rate_.load(std::memory_order_acquire) > 0) {
uint32_t random_number;
{
MutexLock l(&rnd_mutex_);
random_number = rnd_.Uniform(100);
}
if (random_number < non_writeable_rate_.load()) {
return Status::IOError("simulated random write error");
}
}
new_writable_count_++;
if (non_writable_count_.load() > 0) {
non_writable_count_--;
return Status::IOError("simulated write error");
}
EnvOptions optimized = soptions;
if (strstr(f.c_str(), "MANIFEST") != nullptr ||
strstr(f.c_str(), "log") != nullptr) {
optimized.use_mmap_writes = false;
optimized.use_direct_writes = false;
}
Status s = target()->NewWritableFile(f, r, optimized);
if (s.ok()) {
if (strstr(f.c_str(), ".sst") != nullptr) {
r->reset(new SSTableFile(this, std::move(*r)));
} else if (strstr(f.c_str(), "MANIFEST") != nullptr) {
r->reset(new ManifestFile(this, std::move(*r)));
} else if (strstr(f.c_str(), "log") != nullptr) {
r->reset(new WalFile(this, std::move(*r)));
}
}
return s;
}
Status NewRandomAccessFile(const std::string& f,
std::unique_ptr<RandomAccessFile>* r,
const EnvOptions& soptions) override {
class CountingFile : public RandomAccessFile {
public:
CountingFile(std::unique_ptr<RandomAccessFile>&& target,
anon::AtomicCounter* counter,
std::atomic<size_t>* bytes_read)
: target_(std::move(target)),
counter_(counter),
bytes_read_(bytes_read) {}
virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const override {
counter_->Increment();
Status s = target_->Read(offset, n, result, scratch);
*bytes_read_ += result->size();
return s;
}
private:
std::unique_ptr<RandomAccessFile> target_;
anon::AtomicCounter* counter_;
std::atomic<size_t>* bytes_read_;
};
Status s = target()->NewRandomAccessFile(f, r, soptions);
random_file_open_counter_++;
if (s.ok() && count_random_reads_) {
r->reset(new CountingFile(std::move(*r), &random_read_counter_,
&random_read_bytes_counter_));
}
if (s.ok() && soptions.compaction_readahead_size > 0) {
compaction_readahead_size_ = soptions.compaction_readahead_size;
}
return s;
}
virtual Status NewSequentialFile(const std::string& f,
std::unique_ptr<SequentialFile>* r,
const EnvOptions& soptions) override {
class CountingFile : public SequentialFile {
public:
CountingFile(std::unique_ptr<SequentialFile>&& target,
anon::AtomicCounter* counter)
: target_(std::move(target)), counter_(counter) {}
virtual Status Read(size_t n, Slice* result, char* scratch) override {
counter_->Increment();
return target_->Read(n, result, scratch);
}
virtual Status Skip(uint64_t n) override { return target_->Skip(n); }
private:
std::unique_ptr<SequentialFile> target_;
anon::AtomicCounter* counter_;
};
Status s = target()->NewSequentialFile(f, r, soptions);
if (s.ok() && count_sequential_reads_) {
r->reset(new CountingFile(std::move(*r), &sequential_read_counter_));
}
return s;
}
virtual void SleepForMicroseconds(int micros) override {
sleep_counter_.Increment();
if (no_slowdown_ || time_elapse_only_sleep_) {
addon_time_.fetch_add(micros);
}
if (!no_slowdown_) {
target()->SleepForMicroseconds(micros);
}
}
virtual Status GetCurrentTime(int64_t* unix_time) override {
Status s;
if (!time_elapse_only_sleep_) {
s = target()->GetCurrentTime(unix_time);
}
if (s.ok()) {
*unix_time += addon_time_.load();
}
return s;
}
virtual uint64_t NowCPUNanos() override {
now_cpu_count_.fetch_add(1);
return target()->NowCPUNanos();
}
virtual uint64_t NowNanos() override {
return (time_elapse_only_sleep_ ? 0 : target()->NowNanos()) +
addon_time_.load() * 1000;
}
virtual uint64_t NowMicros() override {
return (time_elapse_only_sleep_ ? 0 : target()->NowMicros()) +
addon_time_.load();
}
virtual Status DeleteFile(const std::string& fname) override {
delete_count_.fetch_add(1);
return target()->DeleteFile(fname);
}
Random rnd_;
port::Mutex rnd_mutex_; // Lock to pretect rnd_
// sstable Sync() calls are blocked while this pointer is non-nullptr.
std::atomic<bool> delay_sstable_sync_;
// Drop writes on the floor while this pointer is non-nullptr.
std::atomic<bool> drop_writes_;
// Simulate no-space errors while this pointer is non-nullptr.
std::atomic<bool> no_space_;
// Simulate non-writable file system while this pointer is non-nullptr
std::atomic<bool> non_writable_;
// Force sync of manifest files to fail while this pointer is non-nullptr
std::atomic<bool> manifest_sync_error_;
// Force write to manifest files to fail while this pointer is non-nullptr
std::atomic<bool> manifest_write_error_;
// Force write to log files to fail while this pointer is non-nullptr
std::atomic<bool> log_write_error_;
// Slow down every log write, in micro-seconds.
std::atomic<int> log_write_slowdown_;
// Number of WAL files that are still open for write.
std::atomic<int> num_open_wal_file_;
bool count_random_reads_;
anon::AtomicCounter random_read_counter_;
std::atomic<size_t> random_read_bytes_counter_;
std::atomic<int> random_file_open_counter_;
bool count_sequential_reads_;
anon::AtomicCounter sequential_read_counter_;
anon::AtomicCounter sleep_counter_;
std::atomic<int64_t> bytes_written_;
std::atomic<int> sync_counter_;
std::atomic<uint32_t> non_writeable_rate_;
std::atomic<uint32_t> new_writable_count_;
std::atomic<uint32_t> non_writable_count_;
std::function<void()>* table_write_callback_;
std::atomic<int64_t> addon_time_;
std::atomic<int> now_cpu_count_;
std::atomic<int> delete_count_;
std::atomic<bool> time_elapse_only_sleep_;
bool no_slowdown_;
std::atomic<bool> is_wal_sync_thread_safe_{true};
std::atomic<size_t> compaction_readahead_size_{};
};
#ifndef ROCKSDB_LITE
class OnFileDeletionListener : public EventListener {
public:
OnFileDeletionListener() : matched_count_(0), expected_file_name_("") {}
void SetExpectedFileName(const std::string file_name) {
expected_file_name_ = file_name;
}
void VerifyMatchedCount(size_t expected_value) {
ASSERT_EQ(matched_count_, expected_value);
}
void OnTableFileDeleted(const TableFileDeletionInfo& info) override {
if (expected_file_name_ != "") {
ASSERT_EQ(expected_file_name_, info.file_path);
expected_file_name_ = "";
matched_count_++;
}
}
private:
size_t matched_count_;
std::string expected_file_name_;
};
#endif
// A test merge operator mimics put but also fails if one of merge operands is
// "corrupted".
class TestPutOperator : public MergeOperator {
public:
virtual bool FullMergeV2(const MergeOperationInput& merge_in,
MergeOperationOutput* merge_out) const override {
if (merge_in.existing_value != nullptr &&
*(merge_in.existing_value) == "corrupted") {
return false;
}
for (auto value : merge_in.operand_list) {
if (value == "corrupted") {
return false;
}
}
merge_out->existing_operand = merge_in.operand_list.back();
return true;
}
virtual const char* Name() const override { return "TestPutOperator"; }
};
class DBTestBase : public testing::Test {
public:
// Sequence of option configurations to try
enum OptionConfig : int {
kDefault = 0,
kBlockBasedTableWithPrefixHashIndex = 1,
kBlockBasedTableWithWholeKeyHashIndex = 2,
kPlainTableFirstBytePrefix = 3,
kPlainTableCappedPrefix = 4,
kPlainTableCappedPrefixNonMmap = 5,
kPlainTableAllBytesPrefix = 6,
kVectorRep = 7,
kHashLinkList = 8,
kHashCuckoo = 9,
kMergePut = 10,
kFilter = 11,
kFullFilterWithNewTableReaderForCompactions = 12,
kUncompressed = 13,
kNumLevel_3 = 14,
kDBLogDir = 15,
kWalDirAndMmapReads = 16,
kManifestFileSize = 17,
kPerfOptions = 18,
kHashSkipList = 19,
kUniversalCompaction = 20,
kUniversalCompactionMultiLevel = 21,
kCompressedBlockCache = 22,
kInfiniteMaxOpenFiles = 23,
kxxHashChecksum = 24,
kFIFOCompaction = 25,
kOptimizeFiltersForHits = 26,
kRowCache = 27,
kRecycleLogFiles = 28,
kConcurrentSkipList = 29,
kPipelinedWrite = 30,
kConcurrentWALWrites = 31,
kDirectIO,
kLevelSubcompactions,
kBlockBasedTableWithIndexRestartInterval,
kBlockBasedTableWithPartitionedIndex,
kBlockBasedTableWithPartitionedIndexFormat4,
kPartitionedFilterWithNewTableReaderForCompactions,
kUniversalSubcompactions,
kxxHash64Checksum,
// This must be the last line
kEnd,
};
public:
std::string dbname_;
std::string alternative_wal_dir_;
std::string alternative_db_log_dir_;
MockEnv* mem_env_;
Env* encrypted_env_;
SpecialEnv* env_;
DB* db_;
std::vector<ColumnFamilyHandle*> handles_;
int option_config_;
Options last_options_;
// Skip some options, as they may not be applicable to a specific test.
// To add more skip constants, use values 4, 8, 16, etc.
enum OptionSkip {
kNoSkip = 0,
kSkipDeletesFilterFirst = 1,
kSkipUniversalCompaction = 2,
kSkipMergePut = 4,
kSkipPlainTable = 8,
kSkipHashIndex = 16,
kSkipNoSeekToLast = 32,
kSkipHashCuckoo = 64,
kSkipFIFOCompaction = 128,
kSkipMmapReads = 256,
};
const int kRangeDelSkipConfigs =
// Plain tables do not support range deletions.
kSkipPlainTable |
// MmapReads disables the iterator pinning that RangeDelAggregator
// requires.
kSkipMmapReads;
explicit DBTestBase(const std::string path);
~DBTestBase();
static std::string RandomString(Random* rnd, int len) {
std::string r;
test::RandomString(rnd, len, &r);
return r;
}
static std::string Key(int i) {
char buf[100];
snprintf(buf, sizeof(buf), "key%06d", i);
return std::string(buf);
}
static bool ShouldSkipOptions(int option_config, int skip_mask = kNoSkip);
// Switch to a fresh database with the next option configuration to
// test. Return false if there are no more configurations to test.
bool ChangeOptions(int skip_mask = kNoSkip);
// Switch between different compaction styles.
bool ChangeCompactOptions();
// Switch between different WAL-realted options.
bool ChangeWalOptions();
// Switch between different filter policy
// Jump from kDefault to kFilter to kFullFilter
bool ChangeFilterOptions();
// Switch between different DB options for file ingestion tests.
bool ChangeOptionsForFileIngestionTest();
// Return the current option configuration.
Options CurrentOptions(const anon::OptionsOverride& options_override =
anon::OptionsOverride()) const;
Options CurrentOptions(const Options& default_options,
const anon::OptionsOverride& options_override =
anon::OptionsOverride()) const;
static Options GetDefaultOptions();
Options GetOptions(int option_config,
const Options& default_options = GetDefaultOptions(),
const anon::OptionsOverride& options_override =
anon::OptionsOverride()) const;
DBImpl* dbfull() { return reinterpret_cast<DBImpl*>(db_); }
void CreateColumnFamilies(const std::vector<std::string>& cfs,
const Options& options);
void CreateAndReopenWithCF(const std::vector<std::string>& cfs,
const Options& options);
void ReopenWithColumnFamilies(const std::vector<std::string>& cfs,
const std::vector<Options>& options);
void ReopenWithColumnFamilies(const std::vector<std::string>& cfs,
const Options& options);
Status TryReopenWithColumnFamilies(const std::vector<std::string>& cfs,
const std::vector<Options>& options);
Status TryReopenWithColumnFamilies(const std::vector<std::string>& cfs,
const Options& options);
void Reopen(const Options& options);
void Close();
void DestroyAndReopen(const Options& options);
void Destroy(const Options& options, bool delete_cf_paths = false);
Status ReadOnlyReopen(const Options& options);
Status TryReopen(const Options& options);
bool IsDirectIOSupported();
bool IsMemoryMappedAccessSupported() const;
Status Flush(int cf = 0);
Status Flush(const std::vector<int>& cf_ids);
Status Put(const Slice& k, const Slice& v, WriteOptions wo = WriteOptions());
Status Put(int cf, const Slice& k, const Slice& v,
WriteOptions wo = WriteOptions());
Status Merge(const Slice& k, const Slice& v,
WriteOptions wo = WriteOptions());
Status Merge(int cf, const Slice& k, const Slice& v,
WriteOptions wo = WriteOptions());
Status Delete(const std::string& k);
Status Delete(int cf, const std::string& k);
Status SingleDelete(const std::string& k);
Status SingleDelete(int cf, const std::string& k);
bool SetPreserveDeletesSequenceNumber(SequenceNumber sn);
std::string Get(const std::string& k, const Snapshot* snapshot = nullptr);
std::string Get(int cf, const std::string& k,
const Snapshot* snapshot = nullptr);
Status Get(const std::string& k, PinnableSlice* v);
std::vector<std::string> MultiGet(std::vector<int> cfs,
const std::vector<std::string>& k,
const Snapshot* snapshot = nullptr);
uint64_t GetNumSnapshots();
uint64_t GetTimeOldestSnapshots();
// Return a string that contains all key,value pairs in order,
// formatted like "(k1->v1)(k2->v2)".
std::string Contents(int cf = 0);
std::string AllEntriesFor(const Slice& user_key, int cf = 0);
#ifndef ROCKSDB_LITE
int NumSortedRuns(int cf = 0);
uint64_t TotalSize(int cf = 0);
uint64_t SizeAtLevel(int level);
size_t TotalLiveFiles(int cf = 0);
size_t CountLiveFiles();
int NumTableFilesAtLevel(int level, int cf = 0);
double CompressionRatioAtLevel(int level, int cf = 0);
int TotalTableFiles(int cf = 0, int levels = -1);
#endif // ROCKSDB_LITE
// Return spread of files per level
std::string FilesPerLevel(int cf = 0);
size_t CountFiles();
uint64_t Size(const Slice& start, const Slice& limit, int cf = 0);
void Compact(int cf, const Slice& start, const Slice& limit,
uint32_t target_path_id);
void Compact(int cf, const Slice& start, const Slice& limit);
void Compact(const Slice& start, const Slice& limit);
// Do n memtable compactions, each of which produces an sstable
// covering the range [small,large].
void MakeTables(int n, const std::string& small, const std::string& large,
int cf = 0);
// Prevent pushing of new sstables into deeper levels by adding
// tables that cover a specified range to all levels.
void FillLevels(const std::string& smallest, const std::string& largest,
int cf);
void MoveFilesToLevel(int level, int cf = 0);
#ifndef ROCKSDB_LITE
void DumpFileCounts(const char* label);
#endif // ROCKSDB_LITE
std::string DumpSSTableList();
static void GetSstFiles(Env* env, std::string path,
std::vector<std::string>* files);
int GetSstFileCount(std::string path);
// this will generate non-overlapping files since it keeps increasing key_idx
void GenerateNewFile(Random* rnd, int* key_idx, bool nowait = false);
void GenerateNewFile(int fd, Random* rnd, int* key_idx, bool nowait = false);
static const int kNumKeysByGenerateNewRandomFile;
static const int KNumKeysByGenerateNewFile = 100;
void GenerateNewRandomFile(Random* rnd, bool nowait = false);
std::string IterStatus(Iterator* iter);
Options OptionsForLogIterTest();
std::string DummyString(size_t len, char c = 'a');
void VerifyIterLast(std::string expected_key, int cf = 0);
// Used to test InplaceUpdate
// If previous value is nullptr or delta is > than previous value,
// sets newValue with delta
// If previous value is not empty,
// updates previous value with 'b' string of previous value size - 1.
static UpdateStatus updateInPlaceSmallerSize(char* prevValue,
uint32_t* prevSize, Slice delta,
std::string* newValue);
static UpdateStatus updateInPlaceSmallerVarintSize(char* prevValue,
uint32_t* prevSize,
Slice delta,
std::string* newValue);
static UpdateStatus updateInPlaceLargerSize(char* prevValue,
uint32_t* prevSize, Slice delta,
std::string* newValue);
static UpdateStatus updateInPlaceNoAction(char* prevValue, uint32_t* prevSize,
Slice delta, std::string* newValue);
// Utility method to test InplaceUpdate
void validateNumberOfEntries(int numValues, int cf = 0);
void CopyFile(const std::string& source, const std::string& destination,
uint64_t size = 0);
std::unordered_map<std::string, uint64_t> GetAllSSTFiles(
uint64_t* total_size = nullptr);
std::vector<std::uint64_t> ListTableFiles(Env* env, const std::string& path);
void VerifyDBFromMap(
std::map<std::string, std::string> true_data,
size_t* total_reads_res = nullptr, bool tailing_iter = false,
std::map<std::string, Status> status = std::map<std::string, Status>());
void VerifyDBInternal(
std::vector<std::pair<std::string, std::string>> true_data);
#ifndef ROCKSDB_LITE
uint64_t GetNumberOfSstFilesForColumnFamily(DB* db,
std::string column_family_name);
#endif // ROCKSDB_LITE
uint64_t TestGetTickerCount(const Options& options, Tickers ticker_type) {
return options.statistics->getTickerCount(ticker_type);
}
};
} // namespace rocksdb