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rocksdb/util/testutil.cc

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
// This source code is also licensed under the GPLv2 license found in the
// COPYING file in the root directory of this source tree.
//
// 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.
#include "util/testutil.h"
#include <cctype>
#include <sstream>
#include "db/memtable_list.h"
#include "port/port.h"
#include "util/file_reader_writer.h"
namespace rocksdb {
namespace test {
Slice RandomString(Random* rnd, int len, std::string* dst) {
dst->resize(len);
for (int i = 0; i < len; i++) {
(*dst)[i] = static_cast<char>(' ' + rnd->Uniform(95)); // ' ' .. '~'
}
return Slice(*dst);
}
extern std::string RandomHumanReadableString(Random* rnd, int len) {
std::string ret;
ret.resize(len);
for (int i = 0; i < len; ++i) {
ret[i] = static_cast<char>('a' + rnd->Uniform(26));
}
return ret;
}
std::string RandomKey(Random* rnd, int len, RandomKeyType type) {
// Make sure to generate a wide variety of characters so we
// test the boundary conditions for short-key optimizations.
static const char kTestChars[] = {
'\0', '\1', 'a', 'b', 'c', 'd', 'e', '\xfd', '\xfe', '\xff'
};
std::string result;
for (int i = 0; i < len; i++) {
std::size_t indx = 0;
switch (type) {
case RandomKeyType::RANDOM:
indx = rnd->Uniform(sizeof(kTestChars));
break;
case RandomKeyType::LARGEST:
indx = sizeof(kTestChars) - 1;
break;
case RandomKeyType::MIDDLE:
indx = sizeof(kTestChars) / 2;
break;
case RandomKeyType::SMALLEST:
indx = 0;
break;
}
result += kTestChars[indx];
}
return result;
}
extern Slice CompressibleString(Random* rnd, double compressed_fraction,
int len, std::string* dst) {
int raw = static_cast<int>(len * compressed_fraction);
if (raw < 1) raw = 1;
std::string raw_data;
RandomString(rnd, raw, &raw_data);
// Duplicate the random data until we have filled "len" bytes
dst->clear();
while (dst->size() < (unsigned int)len) {
dst->append(raw_data);
}
dst->resize(len);
return Slice(*dst);
}
namespace {
class Uint64ComparatorImpl : public Comparator {
public:
Uint64ComparatorImpl() { }
virtual const char* Name() const override {
return "rocksdb.Uint64Comparator";
}
virtual int Compare(const Slice& a, const Slice& b) const override {
assert(a.size() == sizeof(uint64_t) && b.size() == sizeof(uint64_t));
const uint64_t* left = reinterpret_cast<const uint64_t*>(a.data());
const uint64_t* right = reinterpret_cast<const uint64_t*>(b.data());
uint64_t leftValue;
uint64_t rightValue;
GetUnaligned(left, &leftValue);
GetUnaligned(right, &rightValue);
if (leftValue == rightValue) {
return 0;
} else if (leftValue < rightValue) {
return -1;
} else {
return 1;
}
}
virtual void FindShortestSeparator(std::string* start,
const Slice& limit) const override {
return;
}
virtual void FindShortSuccessor(std::string* key) const override {
return;
}
};
} // namespace
static port::OnceType once;
static const Comparator* uint64comp;
static void InitModule() {
uint64comp = new Uint64ComparatorImpl;
}
const Comparator* Uint64Comparator() {
port::InitOnce(&once, InitModule);
return uint64comp;
}
WritableFileWriter* GetWritableFileWriter(WritableFile* wf) {
unique_ptr<WritableFile> file(wf);
return new WritableFileWriter(std::move(file), EnvOptions());
}
RandomAccessFileReader* GetRandomAccessFileReader(RandomAccessFile* raf) {
unique_ptr<RandomAccessFile> file(raf);
return new RandomAccessFileReader(std::move(file),
"[test RandomAccessFileReader]");
}
SequentialFileReader* GetSequentialFileReader(SequentialFile* se) {
unique_ptr<SequentialFile> file(se);
return new SequentialFileReader(std::move(file));
}
void CorruptKeyType(InternalKey* ikey) {
std::string keystr = ikey->Encode().ToString();
keystr[keystr.size() - 8] = kTypeLogData;
ikey->DecodeFrom(Slice(keystr.data(), keystr.size()));
}
std::string KeyStr(const std::string& user_key, const SequenceNumber& seq,
const ValueType& t, bool corrupt) {
InternalKey k(user_key, seq, t);
if (corrupt) {
CorruptKeyType(&k);
}
return k.Encode().ToString();
}
std::string RandomName(Random* rnd, const size_t len) {
std::stringstream ss;
for (size_t i = 0; i < len; ++i) {
ss << static_cast<char>(rnd->Uniform(26) + 'a');
}
return ss.str();
}
CompressionType RandomCompressionType(Random* rnd) {
return static_cast<CompressionType>(rnd->Uniform(6));
}
void RandomCompressionTypeVector(const size_t count,
std::vector<CompressionType>* types,
Random* rnd) {
types->clear();
for (size_t i = 0; i < count; ++i) {
types->emplace_back(RandomCompressionType(rnd));
}
}
const SliceTransform* RandomSliceTransform(Random* rnd, int pre_defined) {
int random_num = pre_defined >= 0 ? pre_defined : rnd->Uniform(4);
switch (random_num) {
case 0:
return NewFixedPrefixTransform(rnd->Uniform(20) + 1);
case 1:
return NewCappedPrefixTransform(rnd->Uniform(20) + 1);
case 2:
return NewNoopTransform();
default:
return nullptr;
}
}
BlockBasedTableOptions RandomBlockBasedTableOptions(Random* rnd) {
BlockBasedTableOptions opt;
opt.cache_index_and_filter_blocks = rnd->Uniform(2);
opt.pin_l0_filter_and_index_blocks_in_cache = rnd->Uniform(2);
opt.index_type = rnd->Uniform(2) ? BlockBasedTableOptions::kBinarySearch
: BlockBasedTableOptions::kHashSearch;
opt.hash_index_allow_collision = rnd->Uniform(2);
opt.checksum = static_cast<ChecksumType>(rnd->Uniform(3));
opt.block_size = rnd->Uniform(10000000);
opt.block_size_deviation = rnd->Uniform(100);
opt.block_restart_interval = rnd->Uniform(100);
opt.index_block_restart_interval = rnd->Uniform(100);
opt.whole_key_filtering = rnd->Uniform(2);
return opt;
}
TableFactory* RandomTableFactory(Random* rnd, int pre_defined) {
#ifndef ROCKSDB_LITE
int random_num = pre_defined >= 0 ? pre_defined : rnd->Uniform(4);
switch (random_num) {
case 0:
return NewPlainTableFactory();
case 1:
return NewCuckooTableFactory();
default:
return NewBlockBasedTableFactory();
}
#else
return NewBlockBasedTableFactory();
#endif // !ROCKSDB_LITE
}
MergeOperator* RandomMergeOperator(Random* rnd) {
return new ChanglingMergeOperator(RandomName(rnd, 10));
}
CompactionFilter* RandomCompactionFilter(Random* rnd) {
return new ChanglingCompactionFilter(RandomName(rnd, 10));
}
CompactionFilterFactory* RandomCompactionFilterFactory(Random* rnd) {
return new ChanglingCompactionFilterFactory(RandomName(rnd, 10));
}
void RandomInitDBOptions(DBOptions* db_opt, Random* rnd) {
// boolean options
db_opt->advise_random_on_open = rnd->Uniform(2);
db_opt->allow_mmap_reads = rnd->Uniform(2);
db_opt->allow_mmap_writes = rnd->Uniform(2);
db_opt->use_direct_reads = rnd->Uniform(2);
db_opt->use_direct_io_for_flush_and_compaction = rnd->Uniform(2);
db_opt->create_if_missing = rnd->Uniform(2);
db_opt->create_missing_column_families = rnd->Uniform(2);
db_opt->enable_thread_tracking = rnd->Uniform(2);
db_opt->error_if_exists = rnd->Uniform(2);
db_opt->is_fd_close_on_exec = rnd->Uniform(2);
db_opt->paranoid_checks = rnd->Uniform(2);
db_opt->skip_log_error_on_recovery = rnd->Uniform(2);
db_opt->skip_stats_update_on_db_open = rnd->Uniform(2);
db_opt->use_adaptive_mutex = rnd->Uniform(2);
db_opt->use_fsync = rnd->Uniform(2);
db_opt->recycle_log_file_num = rnd->Uniform(2);
db_opt->avoid_flush_during_recovery = rnd->Uniform(2);
db_opt->avoid_flush_during_shutdown = rnd->Uniform(2);
// int options
db_opt->max_background_compactions = rnd->Uniform(100);
db_opt->max_background_flushes = rnd->Uniform(100);
db_opt->max_file_opening_threads = rnd->Uniform(100);
db_opt->max_open_files = rnd->Uniform(100);
db_opt->table_cache_numshardbits = rnd->Uniform(100);
// size_t options
db_opt->db_write_buffer_size = rnd->Uniform(10000);
db_opt->keep_log_file_num = rnd->Uniform(10000);
db_opt->log_file_time_to_roll = rnd->Uniform(10000);
db_opt->manifest_preallocation_size = rnd->Uniform(10000);
db_opt->max_log_file_size = rnd->Uniform(10000);
// std::string options
db_opt->db_log_dir = "path/to/db_log_dir";
db_opt->wal_dir = "path/to/wal_dir";
// uint32_t options
db_opt->max_subcompactions = rnd->Uniform(100000);
// uint64_t options
static const uint64_t uint_max = static_cast<uint64_t>(UINT_MAX);
db_opt->WAL_size_limit_MB = uint_max + rnd->Uniform(100000);
db_opt->WAL_ttl_seconds = uint_max + rnd->Uniform(100000);
db_opt->bytes_per_sync = uint_max + rnd->Uniform(100000);
db_opt->delayed_write_rate = uint_max + rnd->Uniform(100000);
db_opt->delete_obsolete_files_period_micros = uint_max + rnd->Uniform(100000);
db_opt->max_manifest_file_size = uint_max + rnd->Uniform(100000);
db_opt->max_total_wal_size = uint_max + rnd->Uniform(100000);
db_opt->wal_bytes_per_sync = uint_max + rnd->Uniform(100000);
// unsigned int options
db_opt->stats_dump_period_sec = rnd->Uniform(100000);
}
void RandomInitCFOptions(ColumnFamilyOptions* cf_opt, Random* rnd) {
cf_opt->compaction_style = (CompactionStyle)(rnd->Uniform(4));
// boolean options
cf_opt->report_bg_io_stats = rnd->Uniform(2);
cf_opt->disable_auto_compactions = rnd->Uniform(2);
cf_opt->inplace_update_support = rnd->Uniform(2);
cf_opt->level_compaction_dynamic_level_bytes = rnd->Uniform(2);
cf_opt->optimize_filters_for_hits = rnd->Uniform(2);
cf_opt->paranoid_file_checks = rnd->Uniform(2);
cf_opt->purge_redundant_kvs_while_flush = rnd->Uniform(2);
cf_opt->force_consistency_checks = rnd->Uniform(2);
// double options
cf_opt->hard_rate_limit = static_cast<double>(rnd->Uniform(10000)) / 13;
cf_opt->soft_rate_limit = static_cast<double>(rnd->Uniform(10000)) / 13;
cf_opt->memtable_prefix_bloom_size_ratio =
static_cast<double>(rnd->Uniform(10000)) / 20000.0;
// int options
cf_opt->level0_file_num_compaction_trigger = rnd->Uniform(100);
cf_opt->level0_slowdown_writes_trigger = rnd->Uniform(100);
cf_opt->level0_stop_writes_trigger = rnd->Uniform(100);
cf_opt->max_bytes_for_level_multiplier = rnd->Uniform(100);
cf_opt->max_mem_compaction_level = rnd->Uniform(100);
cf_opt->max_write_buffer_number = rnd->Uniform(100);
cf_opt->max_write_buffer_number_to_maintain = rnd->Uniform(100);
cf_opt->min_write_buffer_number_to_merge = rnd->Uniform(100);
cf_opt->num_levels = rnd->Uniform(100);
cf_opt->target_file_size_multiplier = rnd->Uniform(100);
// vector int options
cf_opt->max_bytes_for_level_multiplier_additional.resize(cf_opt->num_levels);
for (int i = 0; i < cf_opt->num_levels; i++) {
cf_opt->max_bytes_for_level_multiplier_additional[i] = rnd->Uniform(100);
}
// size_t options
cf_opt->arena_block_size = rnd->Uniform(10000);
cf_opt->inplace_update_num_locks = rnd->Uniform(10000);
cf_opt->max_successive_merges = rnd->Uniform(10000);
cf_opt->memtable_huge_page_size = rnd->Uniform(10000);
cf_opt->write_buffer_size = rnd->Uniform(10000);
// uint32_t options
cf_opt->bloom_locality = rnd->Uniform(10000);
cf_opt->max_bytes_for_level_base = rnd->Uniform(10000);
// uint64_t options
static const uint64_t uint_max = static_cast<uint64_t>(UINT_MAX);
cf_opt->max_sequential_skip_in_iterations = uint_max + rnd->Uniform(10000);
cf_opt->target_file_size_base = uint_max + rnd->Uniform(10000);
cf_opt->max_compaction_bytes =
cf_opt->target_file_size_base * rnd->Uniform(100);
// unsigned int options
cf_opt->rate_limit_delay_max_milliseconds = rnd->Uniform(10000);
// pointer typed options
cf_opt->prefix_extractor.reset(RandomSliceTransform(rnd));
cf_opt->table_factory.reset(RandomTableFactory(rnd));
cf_opt->merge_operator.reset(RandomMergeOperator(rnd));
if (cf_opt->compaction_filter) {
delete cf_opt->compaction_filter;
}
cf_opt->compaction_filter = RandomCompactionFilter(rnd);
cf_opt->compaction_filter_factory.reset(RandomCompactionFilterFactory(rnd));
// custom typed options
cf_opt->compression = RandomCompressionType(rnd);
RandomCompressionTypeVector(cf_opt->num_levels,
&cf_opt->compression_per_level, rnd);
}
Status DestroyDir(Env* env, const std::string& dir) {
Status s;
if (env->FileExists(dir).IsNotFound()) {
return s;
}
std::vector<std::string> files_in_dir;
s = env->GetChildren(dir, &files_in_dir);
if (s.ok()) {
for (auto& file_in_dir : files_in_dir) {
if (file_in_dir == "." || file_in_dir == "..") {
continue;
}
s = env->DeleteFile(dir + "/" + file_in_dir);
if (!s.ok()) {
break;
}
}
}
if (s.ok()) {
s = env->DeleteDir(dir);
}
return s;
}
} // namespace test
} // namespace rocksdb