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db_stress_test_base.cc
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// 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.
//
#include <ios>
#include <thread>
#include "rocksdb/options.h"
#include "util/compression.h"
#ifdef GFLAGS
#include "db_stress_tool/db_stress_common.h"
#include "db_stress_tool/db_stress_compaction_filter.h"
#include "db_stress_tool/db_stress_driver.h"
#include "db_stress_tool/db_stress_table_properties_collector.h"
#include "db_stress_tool/db_stress_wide_merge_operator.h"
#include "options/options_parser.h"
#include "rocksdb/convenience.h"
#include "rocksdb/filter_policy.h"
#include "rocksdb/secondary_cache.h"
#include "rocksdb/sst_file_manager.h"
#include "rocksdb/types.h"
#include "rocksdb/utilities/object_registry.h"
#include "rocksdb/utilities/write_batch_with_index.h"
#include "test_util/testutil.h"
#include "util/cast_util.h"
#include "utilities/backup/backup_engine_impl.h"
#include "utilities/fault_injection_fs.h"
#include "utilities/fault_injection_secondary_cache.h"
namespace ROCKSDB_NAMESPACE {
namespace {
std::shared_ptr<const FilterPolicy> CreateFilterPolicy() {
if (FLAGS_bloom_bits < 0) {
return BlockBasedTableOptions().filter_policy;
}
const FilterPolicy* new_policy;
if (FLAGS_bloom_before_level == INT_MAX) {
// Use Bloom API
new_policy = NewBloomFilterPolicy(FLAGS_bloom_bits, false);
} else {
new_policy =
NewRibbonFilterPolicy(FLAGS_bloom_bits, FLAGS_bloom_before_level);
}
return std::shared_ptr<const FilterPolicy>(new_policy);
}
} // namespace
StressTest::StressTest()
: cache_(NewCache(FLAGS_cache_size, FLAGS_cache_numshardbits)),
filter_policy_(CreateFilterPolicy()),
db_(nullptr),
txn_db_(nullptr),
optimistic_txn_db_(nullptr),
db_aptr_(nullptr),
clock_(db_stress_env->GetSystemClock().get()),
new_column_family_name_(1),
num_times_reopened_(0),
db_preload_finished_(false),
cmp_db_(nullptr),
is_db_stopped_(false) {
if (FLAGS_destroy_db_initially) {
std::vector<std::string> files;
db_stress_env->GetChildren(FLAGS_db, &files);
for (unsigned int i = 0; i < files.size(); i++) {
if (Slice(files[i]).starts_with("heap-")) {
db_stress_env->DeleteFile(FLAGS_db + "/" + files[i]);
}
}
Options options;
options.env = db_stress_env;
// Remove files without preserving manfiest files
const Status s = !FLAGS_use_blob_db
? DestroyDB(FLAGS_db, options)
: blob_db::DestroyBlobDB(FLAGS_db, options,
blob_db::BlobDBOptions());
if (!s.ok()) {
fprintf(stderr, "Cannot destroy original db: %s\n", s.ToString().c_str());
exit(1);
}
}
}
StressTest::~StressTest() {
for (auto cf : column_families_) {
delete cf;
}
column_families_.clear();
delete db_;
for (auto* cf : cmp_cfhs_) {
delete cf;
}
cmp_cfhs_.clear();
delete cmp_db_;
}
std::shared_ptr<Cache> StressTest::NewCache(size_t capacity,
int32_t num_shard_bits) {
ConfigOptions config_options;
if (capacity <= 0) {
return nullptr;
}
std::shared_ptr<SecondaryCache> secondary_cache;
if (!FLAGS_secondary_cache_uri.empty()) {
assert(!strstr(FLAGS_secondary_cache_uri.c_str(),
"compressed_secondary_cache") ||
(FLAGS_compressed_secondary_cache_size == 0 &&
FLAGS_compressed_secondary_cache_ratio == 0.0 &&
!StartsWith(FLAGS_cache_type, "tiered_")));
Status s = SecondaryCache::CreateFromString(
config_options, FLAGS_secondary_cache_uri, &secondary_cache);
if (secondary_cache == nullptr) {
fprintf(stderr,
"No secondary cache registered matching string: %s status=%s\n",
FLAGS_secondary_cache_uri.c_str(), s.ToString().c_str());
exit(1);
}
if (FLAGS_secondary_cache_fault_one_in > 0) {
secondary_cache = std::make_shared<FaultInjectionSecondaryCache>(
secondary_cache, static_cast<uint32_t>(FLAGS_seed),
FLAGS_secondary_cache_fault_one_in);
}
} else if (FLAGS_compressed_secondary_cache_size > 0) {
if (StartsWith(FLAGS_cache_type, "tiered_")) {
fprintf(stderr,
"Cannot specify both compressed_secondary_cache_size and %s\n",
FLAGS_cache_type.c_str());
exit(1);
}
CompressedSecondaryCacheOptions opts;
opts.capacity = FLAGS_compressed_secondary_cache_size;
opts.compress_format_version = FLAGS_compress_format_version;
secondary_cache = NewCompressedSecondaryCache(opts);
if (secondary_cache == nullptr) {
fprintf(stderr, "Failed to allocate compressed secondary cache\n");
exit(1);
}
compressed_secondary_cache = secondary_cache;
}
std::string cache_type = FLAGS_cache_type;
size_t cache_size = FLAGS_cache_size;
bool tiered = false;
if (StartsWith(cache_type, "tiered_")) {
tiered = true;
cache_type.erase(0, strlen("tiered_"));
}
if (FLAGS_use_write_buffer_manager) {
cache_size += FLAGS_db_write_buffer_size;
}
if (cache_type == "clock_cache") {
fprintf(stderr, "Old clock cache implementation has been removed.\n");
exit(1);
} else if (EndsWith(cache_type, "hyper_clock_cache")) {
size_t estimated_entry_charge;
if (cache_type == "fixed_hyper_clock_cache" ||
cache_type == "hyper_clock_cache") {
estimated_entry_charge = FLAGS_block_size;
} else if (cache_type == "auto_hyper_clock_cache") {
estimated_entry_charge = 0;
} else {
fprintf(stderr, "Cache type not supported.");
exit(1);
}
HyperClockCacheOptions opts(cache_size, estimated_entry_charge,
num_shard_bits);
opts.hash_seed = BitwiseAnd(FLAGS_seed, INT32_MAX);
if (tiered) {
TieredCacheOptions tiered_opts;
tiered_opts.cache_opts = &opts;
tiered_opts.cache_type = PrimaryCacheType::kCacheTypeHCC;
tiered_opts.total_capacity = cache_size;
tiered_opts.compressed_secondary_ratio = 0.5;
block_cache = NewTieredCache(tiered_opts);
} else {
opts.secondary_cache = std::move(secondary_cache);
block_cache = opts.MakeSharedCache();
}
} else if (EndsWith(cache_type, "lru_cache")) {
LRUCacheOptions opts;
opts.capacity = capacity;
opts.num_shard_bits = num_shard_bits;
opts.metadata_charge_policy =
static_cast<CacheMetadataChargePolicy>(FLAGS_metadata_charge_policy);
opts.use_adaptive_mutex = FLAGS_use_adaptive_mutex_lru;
opts.high_pri_pool_ratio = FLAGS_high_pri_pool_ratio;
opts.low_pri_pool_ratio = FLAGS_low_pri_pool_ratio;
if (tiered) {
TieredCacheOptions tiered_opts;
tiered_opts.cache_opts = &opts;
tiered_opts.cache_type = PrimaryCacheType::kCacheTypeLRU;
tiered_opts.total_capacity = cache_size;
tiered_opts.compressed_secondary_ratio = 0.5;
block_cache = NewTieredCache(tiered_opts);
} else {
opts.secondary_cache = std::move(secondary_cache);
block_cache = NewLRUCache(opts);
}
} else {
fprintf(stderr, "Cache type not supported.");
exit(1);
}
return block_cache;
}
std::vector<std::string> StressTest::GetBlobCompressionTags() {
std::vector<std::string> compression_tags{"kNoCompression"};
if (Snappy_Supported()) {
compression_tags.emplace_back("kSnappyCompression");
}
if (LZ4_Supported()) {
compression_tags.emplace_back("kLZ4Compression");
}
if (ZSTD_Supported()) {
compression_tags.emplace_back("kZSTD");
}
return compression_tags;
}
bool StressTest::BuildOptionsTable() {
if (FLAGS_set_options_one_in <= 0) {
return true;
}
std::unordered_map<std::string, std::vector<std::string>> options_tbl = {
{"write_buffer_size",
{std::to_string(options_.write_buffer_size),
std::to_string(options_.write_buffer_size * 2),
std::to_string(options_.write_buffer_size * 4)}},
{"max_write_buffer_number",
{std::to_string(options_.max_write_buffer_number),
std::to_string(options_.max_write_buffer_number * 2),
std::to_string(options_.max_write_buffer_number * 4)}},
{"arena_block_size",
{
std::to_string(options_.arena_block_size),
std::to_string(options_.write_buffer_size / 4),
std::to_string(options_.write_buffer_size / 8),
}},
{"memtable_huge_page_size", {"0", std::to_string(2 * 1024 * 1024)}},
{"max_successive_merges", {"0", "2", "4"}},
{"strict_max_successive_merges", {"false", "true"}},
{"inplace_update_num_locks", {"100", "200", "300"}},
// TODO: re-enable once internal task T124324915 is fixed.
// {"experimental_mempurge_threshold", {"0.0", "1.0"}},
// TODO(ljin): enable test for this option
// {"disable_auto_compactions", {"100", "200", "300"}},
{"level0_file_num_compaction_trigger",
{
std::to_string(options_.level0_file_num_compaction_trigger),
std::to_string(options_.level0_file_num_compaction_trigger + 2),
std::to_string(options_.level0_file_num_compaction_trigger + 4),
}},
{"level0_slowdown_writes_trigger",
{
std::to_string(options_.level0_slowdown_writes_trigger),
std::to_string(options_.level0_slowdown_writes_trigger + 2),
std::to_string(options_.level0_slowdown_writes_trigger + 4),
}},
{"level0_stop_writes_trigger",
{
std::to_string(options_.level0_stop_writes_trigger),
std::to_string(options_.level0_stop_writes_trigger + 2),
std::to_string(options_.level0_stop_writes_trigger + 4),
}},
{"max_compaction_bytes",
{
std::to_string(options_.target_file_size_base * 5),
std::to_string(options_.target_file_size_base * 15),
std::to_string(options_.target_file_size_base * 100),
}},
{"target_file_size_base",
{
std::to_string(options_.target_file_size_base),
std::to_string(options_.target_file_size_base * 2),
std::to_string(options_.target_file_size_base * 4),
}},
{"target_file_size_multiplier",
{
std::to_string(options_.target_file_size_multiplier),
"1",
"2",
}},
{"max_bytes_for_level_base",
{
std::to_string(options_.max_bytes_for_level_base / 2),
std::to_string(options_.max_bytes_for_level_base),
std::to_string(options_.max_bytes_for_level_base * 2),
}},
{"max_bytes_for_level_multiplier",
{
std::to_string(options_.max_bytes_for_level_multiplier),
"1",
"2",
}},
{"max_sequential_skip_in_iterations", {"4", "8", "12"}},
};
if (FLAGS_allow_setting_blob_options_dynamically) {
options_tbl.emplace("enable_blob_files",
std::vector<std::string>{"false", "true"});
options_tbl.emplace("min_blob_size",
std::vector<std::string>{"0", "8", "16"});
options_tbl.emplace("blob_file_size",
std::vector<std::string>{"1M", "16M", "256M", "1G"});
options_tbl.emplace("blob_compression_type", GetBlobCompressionTags());
options_tbl.emplace("enable_blob_garbage_collection",
std::vector<std::string>{"false", "true"});
options_tbl.emplace(
"blob_garbage_collection_age_cutoff",
std::vector<std::string>{"0.0", "0.25", "0.5", "0.75", "1.0"});
options_tbl.emplace("blob_garbage_collection_force_threshold",
std::vector<std::string>{"0.5", "0.75", "1.0"});
options_tbl.emplace("blob_compaction_readahead_size",
std::vector<std::string>{"0", "1M", "4M"});
options_tbl.emplace("blob_file_starting_level",
std::vector<std::string>{"0", "1", "2"});
options_tbl.emplace("prepopulate_blob_cache",
std::vector<std::string>{"kDisable", "kFlushOnly"});
}
if (FLAGS_bloom_before_level != INT_MAX) {
// Can modify RibbonFilterPolicy field
options_tbl.emplace("table_factory.filter_policy.bloom_before_level",
std::vector<std::string>{"-1", "0", "1", "2",
"2147483646", "2147483647"});
}
options_table_ = std::move(options_tbl);
for (const auto& iter : options_table_) {
options_index_.push_back(iter.first);
}
return true;
}
void StressTest::InitDb(SharedState* shared) {
uint64_t now = clock_->NowMicros();
fprintf(stdout, "%s Initializing db_stress\n",
clock_->TimeToString(now / 1000000).c_str());
PrintEnv();
Open(shared);
BuildOptionsTable();
}
void StressTest::FinishInitDb(SharedState* shared) {
if (FLAGS_read_only) {
uint64_t now = clock_->NowMicros();
fprintf(stdout, "%s Preloading db with %" PRIu64 " KVs\n",
clock_->TimeToString(now / 1000000).c_str(), FLAGS_max_key);
PreloadDbAndReopenAsReadOnly(FLAGS_max_key, shared);
}
if (shared->HasHistory()) {
// The way it works right now is, if there's any history, that means the
// previous run mutating the DB had all its operations traced, in which case
// we should always be able to `Restore()` the expected values to match the
// `db_`'s current seqno.
Status s = shared->Restore(db_);
if (!s.ok()) {
fprintf(stderr, "Error restoring historical expected values: %s\n",
s.ToString().c_str());
exit(1);
}
}
if (FLAGS_use_txn && !FLAGS_use_optimistic_txn) {
// It's OK here without sync because unsynced data cannot be lost at this
// point
// - even with sync_fault_injection=1 as the
// file is still directly writable until after FinishInitDb()
ProcessRecoveredPreparedTxns(shared);
}
if (FLAGS_enable_compaction_filter) {
auto* compaction_filter_factory =
static_cast<DbStressCompactionFilterFactory*>(
options_.compaction_filter_factory.get());
assert(compaction_filter_factory);
// This must be called only after any potential `SharedState::Restore()` has
// completed in order for the `compaction_filter_factory` to operate on the
// correct latest values file.
compaction_filter_factory->SetSharedState(shared);
fprintf(stdout, "Compaction filter factory: %s\n",
compaction_filter_factory->Name());
}
}
void StressTest::TrackExpectedState(SharedState* shared) {
// For `FLAGS_manual_wal_flush_one_inWAL`
// data can be lost when `manual_wal_flush_one_in > 0` and `FlushWAL()` is not
// explictly called by users of RocksDB (in our case, db stress).
// Therefore recovery from such potential WAL data loss is a prefix recovery
// that requires tracing
if ((FLAGS_sync_fault_injection || FLAGS_disable_wal ||
FLAGS_manual_wal_flush_one_in > 0) &&
IsStateTracked()) {
Status s = shared->SaveAtAndAfter(db_);
if (!s.ok()) {
fprintf(stderr, "Error enabling history tracing: %s\n",
s.ToString().c_str());
exit(1);
}
}
}
Status StressTest::AssertSame(DB* db, ColumnFamilyHandle* cf,
ThreadState::SnapshotState& snap_state) {
Status s;
if (cf->GetName() != snap_state.cf_at_name) {
return s;
}
// This `ReadOptions` is for validation purposes. Ignore
// `FLAGS_rate_limit_user_ops` to avoid slowing any validation.
ReadOptions ropt;
ropt.snapshot = snap_state.snapshot;
Slice ts;
if (!snap_state.timestamp.empty()) {
ts = snap_state.timestamp;
ropt.timestamp = &ts;
}
PinnableSlice exp_v(&snap_state.value);
exp_v.PinSelf();
PinnableSlice v;
s = db->Get(ropt, cf, snap_state.key, &v);
if (!s.ok() && !s.IsNotFound()) {
// When `persist_user_defined_timestamps` is false, a repeated read with
// both a read timestamp and an explicitly taken snapshot cannot guarantee
// consistent result all the time. When it cannot return consistent result,
// it will return an `InvalidArgument` status.
if (s.IsInvalidArgument() && !FLAGS_persist_user_defined_timestamps) {
return Status::OK();
}
return s;
}
if (snap_state.status != s) {
return Status::Corruption(
"The snapshot gave inconsistent results for key " +
std::to_string(Hash(snap_state.key.c_str(), snap_state.key.size(), 0)) +
" in cf " + cf->GetName() + ": (" + snap_state.status.ToString() +
") vs. (" + s.ToString() + ")");
}
if (s.ok()) {
if (exp_v != v) {
return Status::Corruption("The snapshot gave inconsistent values: (" +
exp_v.ToString() + ") vs. (" + v.ToString() +
")");
}
}
if (snap_state.key_vec != nullptr) {
// When `prefix_extractor` is set, seeking to beginning and scanning
// across prefixes are only supported with `total_order_seek` set.
ropt.total_order_seek = true;
std::unique_ptr<Iterator> iterator(db->NewIterator(ropt));
std::unique_ptr<std::vector<bool>> tmp_bitvec(
new std::vector<bool>(FLAGS_max_key));
for (iterator->SeekToFirst(); iterator->Valid(); iterator->Next()) {
uint64_t key_val;
if (GetIntVal(iterator->key().ToString(), &key_val)) {
(*tmp_bitvec.get())[key_val] = true;
}
}
if (!std::equal(snap_state.key_vec->begin(), snap_state.key_vec->end(),
tmp_bitvec.get()->begin())) {
return Status::Corruption("Found inconsistent keys at this snapshot");
}
}
return Status::OK();
}
void StressTest::ProcessStatus(SharedState* shared, std::string opname,
Status s) const {
if (s.ok()) {
return;
}
if (!s.IsIOError() || !std::strstr(s.getState(), "injected")) {
std::ostringstream oss;
oss << opname << " failed: " << s.ToString();
VerificationAbort(shared, oss.str());
assert(false);
}
fprintf(stdout, "%s failed: %s\n", opname.c_str(), s.ToString().c_str());
}
void StressTest::VerificationAbort(SharedState* shared, std::string msg) const {
fprintf(stderr, "Verification failed: %s\n", msg.c_str());
shared->SetVerificationFailure();
}
void StressTest::VerificationAbort(SharedState* shared, std::string msg, int cf,
int64_t key) const {
auto key_str = Key(key);
Slice key_slice = key_str;
fprintf(stderr,
"Verification failed for column family %d key %s (%" PRIi64 "): %s\n",
cf, key_slice.ToString(true).c_str(), key, msg.c_str());
shared->SetVerificationFailure();
}
void StressTest::VerificationAbort(SharedState* shared, std::string msg, int cf,
int64_t key, Slice value_from_db,
Slice value_from_expected) const {
auto key_str = Key(key);
fprintf(stderr,
"Verification failed for column family %d key %s (%" PRIi64
"): value_from_db: %s, value_from_expected: %s, msg: %s\n",
cf, Slice(key_str).ToString(true).c_str(), key,
value_from_db.ToString(true).c_str(),
value_from_expected.ToString(true).c_str(), msg.c_str());
shared->SetVerificationFailure();
}
void StressTest::VerificationAbort(SharedState* shared, int cf, int64_t key,
const Slice& value,
const WideColumns& columns) const {
assert(shared);
auto key_str = Key(key);
fprintf(stderr,
"Verification failed for column family %d key %s (%" PRIi64
"): Value and columns inconsistent: value: %s, columns: %s\n",
cf, Slice(key_str).ToString(/* hex */ true).c_str(), key,
value.ToString(/* hex */ true).c_str(),
WideColumnsToHex(columns).c_str());
shared->SetVerificationFailure();
}
std::string StressTest::DebugString(const Slice& value,
const WideColumns& columns) {
std::ostringstream oss;
oss << "value: " << value.ToString(/* hex */ true)
<< ", columns: " << WideColumnsToHex(columns);
return oss.str();
}
void StressTest::PrintStatistics() {
if (dbstats) {
fprintf(stdout, "STATISTICS:\n%s\n", dbstats->ToString().c_str());
}
if (dbstats_secondaries) {
fprintf(stdout, "Secondary instances STATISTICS:\n%s\n",
dbstats_secondaries->ToString().c_str());
}
}
// Currently PreloadDb has to be single-threaded.
void StressTest::PreloadDbAndReopenAsReadOnly(int64_t number_of_keys,
SharedState* shared) {
WriteOptions write_opts;
write_opts.disableWAL = FLAGS_disable_wal;
if (FLAGS_sync) {
write_opts.sync = true;
}
if (FLAGS_rate_limit_auto_wal_flush) {
write_opts.rate_limiter_priority = Env::IO_USER;
}
char value[100];
int cf_idx = 0;
Status s;
for (auto cfh : column_families_) {
for (int64_t k = 0; k != number_of_keys; ++k) {
const std::string key = Key(k);
PendingExpectedValue pending_expected_value =
shared->PreparePut(cf_idx, k);
const uint32_t value_base = pending_expected_value.GetFinalValueBase();
const size_t sz = GenerateValue(value_base, value, sizeof(value));
const Slice v(value, sz);
std::string ts;
if (FLAGS_user_timestamp_size > 0) {
ts = GetNowNanos();
}
if (FLAGS_use_put_entity_one_in > 0 &&
(value_base % FLAGS_use_put_entity_one_in) == 0) {
s = db_->PutEntity(write_opts, cfh, key,
GenerateWideColumns(value_base, v));
} else if (FLAGS_use_merge) {
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size > 0) {
s = db_->Merge(write_opts, cfh, key, ts, v);
} else {
s = db_->Merge(write_opts, cfh, key, v);
}
} else {
s = ExecuteTransaction(
write_opts, /*thread=*/nullptr,
[&](Transaction& txn) { return txn.Merge(cfh, key, v); });
}
} else {
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size > 0) {
s = db_->Put(write_opts, cfh, key, ts, v);
} else {
s = db_->Put(write_opts, cfh, key, v);
}
} else {
s = ExecuteTransaction(
write_opts, /*thread=*/nullptr,
[&](Transaction& txn) { return txn.Put(cfh, key, v); });
}
}
if (!s.ok()) {
pending_expected_value.Rollback();
break;
}
pending_expected_value.Commit();
}
if (!s.ok()) {
break;
}
++cf_idx;
}
if (s.ok()) {
s = db_->Flush(FlushOptions(), column_families_);
}
if (s.ok()) {
for (auto cf : column_families_) {
delete cf;
}
column_families_.clear();
delete db_;
db_ = nullptr;
txn_db_ = nullptr;
optimistic_txn_db_ = nullptr;
db_preload_finished_.store(true);
auto now = clock_->NowMicros();
fprintf(stdout, "%s Reopening database in read-only\n",
clock_->TimeToString(now / 1000000).c_str());
// Reopen as read-only, can ignore all options related to updates
Open(shared);
} else {
fprintf(stderr, "Failed to preload db");
exit(1);
}
}
Status StressTest::SetOptions(ThreadState* thread) {
assert(FLAGS_set_options_one_in > 0);
std::unordered_map<std::string, std::string> opts;
std::string name =
options_index_[thread->rand.Next() % options_index_.size()];
int value_idx = thread->rand.Next() % options_table_[name].size();
if (name == "level0_file_num_compaction_trigger" ||
name == "level0_slowdown_writes_trigger" ||
name == "level0_stop_writes_trigger") {
opts["level0_file_num_compaction_trigger"] =
options_table_["level0_file_num_compaction_trigger"][value_idx];
opts["level0_slowdown_writes_trigger"] =
options_table_["level0_slowdown_writes_trigger"][value_idx];
opts["level0_stop_writes_trigger"] =
options_table_["level0_stop_writes_trigger"][value_idx];
} else {
opts[name] = options_table_[name][value_idx];
}
int rand_cf_idx = thread->rand.Next() % FLAGS_column_families;
auto cfh = column_families_[rand_cf_idx];
return db_->SetOptions(cfh, opts);
}
void StressTest::ProcessRecoveredPreparedTxns(SharedState* shared) {
assert(txn_db_);
std::vector<Transaction*> recovered_prepared_trans;
txn_db_->GetAllPreparedTransactions(&recovered_prepared_trans);
for (Transaction* txn : recovered_prepared_trans) {
ProcessRecoveredPreparedTxnsHelper(txn, shared);
delete txn;
}
recovered_prepared_trans.clear();
txn_db_->GetAllPreparedTransactions(&recovered_prepared_trans);
assert(recovered_prepared_trans.size() == 0);
}
void StressTest::ProcessRecoveredPreparedTxnsHelper(Transaction* txn,
SharedState* shared) {
thread_local Random rand(static_cast<uint32_t>(FLAGS_seed));
for (size_t i = 0; i < column_families_.size(); ++i) {
std::unique_ptr<WBWIIterator> wbwi_iter(
txn->GetWriteBatch()->NewIterator(column_families_[i]));
for (wbwi_iter->SeekToFirst(); wbwi_iter->Valid(); wbwi_iter->Next()) {
uint64_t key_val;
if (GetIntVal(wbwi_iter->Entry().key.ToString(), &key_val)) {
shared->SyncPendingPut(static_cast<int>(i) /* cf_idx */, key_val);
}
}
}
if (rand.OneIn(2)) {
Status s = txn->Commit();
assert(s.ok());
} else {
Status s = txn->Rollback();
assert(s.ok());
}
}
Status StressTest::NewTxn(WriteOptions& write_opts,
std::unique_ptr<Transaction>* out_txn) {
if (!FLAGS_use_txn) {
return Status::InvalidArgument("NewTxn when FLAGS_use_txn is not set");
}
write_opts.disableWAL = FLAGS_disable_wal;
static std::atomic<uint64_t> txn_id = {0};
if (FLAGS_use_optimistic_txn) {
out_txn->reset(optimistic_txn_db_->BeginTransaction(write_opts));
return Status::OK();
} else {
TransactionOptions txn_options;
txn_options.use_only_the_last_commit_time_batch_for_recovery =
FLAGS_use_only_the_last_commit_time_batch_for_recovery;
txn_options.lock_timeout = 600000; // 10 min
txn_options.deadlock_detect = true;
out_txn->reset(txn_db_->BeginTransaction(write_opts, txn_options));
auto istr = std::to_string(txn_id.fetch_add(1));
Status s = (*out_txn)->SetName("xid" + istr);
return s;
}
}
Status StressTest::CommitTxn(Transaction& txn, ThreadState* thread) {
if (!FLAGS_use_txn) {
return Status::InvalidArgument("CommitTxn when FLAGS_use_txn is not set");
}
Status s = Status::OK();
if (FLAGS_use_optimistic_txn) {
assert(optimistic_txn_db_);
s = txn.Commit();
} else {
assert(txn_db_);
s = txn.Prepare();
std::shared_ptr<const Snapshot> timestamped_snapshot;
if (s.ok()) {
if (thread && FLAGS_create_timestamped_snapshot_one_in &&
thread->rand.OneIn(FLAGS_create_timestamped_snapshot_one_in)) {
uint64_t ts = db_stress_env->NowNanos();
s = txn.CommitAndTryCreateSnapshot(/*notifier=*/nullptr, ts,
×tamped_snapshot);
std::pair<Status, std::shared_ptr<const Snapshot>> res;
if (thread->tid == 0) {
uint64_t now = db_stress_env->NowNanos();
res = txn_db_->CreateTimestampedSnapshot(now);
if (res.first.ok()) {
assert(res.second);
assert(res.second->GetTimestamp() == now);
if (timestamped_snapshot) {
assert(res.second->GetTimestamp() >
timestamped_snapshot->GetTimestamp());
}
} else {
assert(!res.second);
}
}
} else {
s = txn.Commit();
}
}
if (thread && FLAGS_create_timestamped_snapshot_one_in > 0 &&
thread->rand.OneInOpt(50000)) {
uint64_t now = db_stress_env->NowNanos();
constexpr uint64_t time_diff = static_cast<uint64_t>(1000) * 1000 * 1000;
txn_db_->ReleaseTimestampedSnapshotsOlderThan(now - time_diff);
}
}
return s;
}
Status StressTest::ExecuteTransaction(
WriteOptions& write_opts, ThreadState* thread,
std::function<Status(Transaction&)>&& ops) {
std::unique_ptr<Transaction> txn;
Status s = NewTxn(write_opts, &txn);
std::string try_again_messages;
if (s.ok()) {
for (int tries = 1;; ++tries) {
s = ops(*txn);
if (s.ok()) {
s = CommitTxn(*txn, thread);
if (s.ok()) {
break;
}
}
// Optimistic txn might return TryAgain, in which case rollback
// and try again.
if (!s.IsTryAgain() || !FLAGS_use_optimistic_txn) {
break;
}
// Record and report historical TryAgain messages for debugging
try_again_messages +=
std::to_string(SystemClock::Default()->NowMicros() / 1000);
try_again_messages += "ms ";
try_again_messages += s.getState();
try_again_messages += "\n";
// In theory, each Rollback after TryAgain should have an independent
// chance of success, so too many retries could indicate something is
// not working properly.
if (tries >= 10) {
s = Status::TryAgain(try_again_messages);
break;
}
s = txn->Rollback();
if (!s.ok()) {
break;
}
}
}
return s;
}
void StressTest::OperateDb(ThreadState* thread) {
ReadOptions read_opts(FLAGS_verify_checksum, true);
read_opts.rate_limiter_priority =
FLAGS_rate_limit_user_ops ? Env::IO_USER : Env::IO_TOTAL;
read_opts.async_io = FLAGS_async_io;
read_opts.adaptive_readahead = FLAGS_adaptive_readahead;
read_opts.readahead_size = FLAGS_readahead_size;
read_opts.auto_readahead_size = FLAGS_auto_readahead_size;
read_opts.fill_cache = FLAGS_fill_cache;
read_opts.optimize_multiget_for_io = FLAGS_optimize_multiget_for_io;
WriteOptions write_opts;
if (FLAGS_rate_limit_auto_wal_flush) {
write_opts.rate_limiter_priority = Env::IO_USER;
}
write_opts.memtable_insert_hint_per_batch =
FLAGS_memtable_insert_hint_per_batch;
auto shared = thread->shared;
char value[100];
std::string from_db;
if (FLAGS_sync) {
write_opts.sync = true;
}
write_opts.disableWAL = FLAGS_disable_wal;
write_opts.protection_bytes_per_key = FLAGS_batch_protection_bytes_per_key;
const int prefix_bound = static_cast<int>(FLAGS_readpercent) +
static_cast<int>(FLAGS_prefixpercent);
const int write_bound = prefix_bound + static_cast<int>(FLAGS_writepercent);
const int del_bound = write_bound + static_cast<int>(FLAGS_delpercent);
const int delrange_bound =
del_bound + static_cast<int>(FLAGS_delrangepercent);
const int iterate_bound =
delrange_bound + static_cast<int>(FLAGS_iterpercent);
const uint64_t ops_per_open = FLAGS_ops_per_thread / (FLAGS_reopen + 1);
#ifndef NDEBUG
if (FLAGS_read_fault_one_in) {
fault_fs_guard->SetThreadLocalReadErrorContext(
thread->shared->GetSeed(), FLAGS_read_fault_one_in,
FLAGS_inject_error_severity == 1 /* retryable */);
}
#endif // NDEBUG
thread->stats.Start();
for (int open_cnt = 0; open_cnt <= FLAGS_reopen; ++open_cnt) {
if (thread->shared->HasVerificationFailedYet() ||
thread->shared->ShouldStopTest()) {
break;
}
if (open_cnt != 0) {
thread->stats.FinishedSingleOp();
MutexLock l(thread->shared->GetMutex());
while (!thread->snapshot_queue.empty()) {
db_->ReleaseSnapshot(thread->snapshot_queue.front().second.snapshot);
delete thread->snapshot_queue.front().second.key_vec;
thread->snapshot_queue.pop();
}
thread->shared->IncVotedReopen();
if (thread->shared->AllVotedReopen()) {
thread->shared->GetStressTest()->Reopen(thread);
thread->shared->GetCondVar()->SignalAll();
} else {
thread->shared->GetCondVar()->Wait();
}
// Commenting this out as we don't want to reset stats on each open.
// thread->stats.Start();
}
for (uint64_t i = 0; i < ops_per_open; i++) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
// Change Options
if (thread->rand.OneInOpt(FLAGS_set_options_one_in)) {
SetOptions(thread);
}
if (thread->rand.OneInOpt(FLAGS_set_in_place_one_in)) {
options_.inplace_update_support ^= options_.inplace_update_support;
}
if (thread->tid == 0 && FLAGS_verify_db_one_in > 0 &&
thread->rand.OneIn(FLAGS_verify_db_one_in)) {
ContinuouslyVerifyDb(thread);
if (thread->shared->ShouldStopTest()) {
break;
}
}
MaybeClearOneColumnFamily(thread);
if (thread->rand.OneInOpt(FLAGS_manual_wal_flush_one_in)) {
bool sync = thread->rand.OneIn(2) ? true : false;
Status s = db_->FlushWAL(sync);
if (!s.ok() && !(sync && s.IsNotSupported())) {
fprintf(stderr, "FlushWAL(sync=%s) failed: %s\n",
(sync ? "true" : "false"), s.ToString().c_str());
}
}
if (thread->rand.OneInOpt(FLAGS_lock_wal_one_in)) {
Status s = db_->LockWAL();
if (!s.ok()) {
fprintf(stderr, "LockWAL() failed: %s\n", s.ToString().c_str());
} else {
auto old_seqno = db_->GetLatestSequenceNumber();
// Yield for a while
do {
std::this_thread::yield();
} while (thread->rand.OneIn(2));
// Latest seqno should not have changed
auto new_seqno = db_->GetLatestSequenceNumber();
if (old_seqno != new_seqno) {
fprintf(
stderr,
"Failure: latest seqno changed from %u to %u with WAL locked\n",
(unsigned)old_seqno, (unsigned)new_seqno);
}
s = db_->UnlockWAL();
if (!s.ok()) {
fprintf(stderr, "UnlockWAL() failed: %s\n", s.ToString().c_str());
}
}
}
if (thread->rand.OneInOpt(FLAGS_sync_wal_one_in)) {
Status s = db_->SyncWAL();
if (!s.ok() && !s.IsNotSupported()) {
fprintf(stderr, "SyncWAL() failed: %s\n", s.ToString().c_str());
}
}
int rand_column_family = thread->rand.Next() % FLAGS_column_families;
ColumnFamilyHandle* column_family = column_families_[rand_column_family];
if (thread->rand.OneInOpt(FLAGS_compact_files_one_in)) {
TestCompactFiles(thread, column_family);
}
int64_t rand_key = GenerateOneKey(thread, i);
std::string keystr = Key(rand_key);
Slice key = keystr;
if (thread->rand.OneInOpt(FLAGS_compact_range_one_in)) {
TestCompactRange(thread, rand_key, key, column_family);
if (thread->shared->HasVerificationFailedYet()) {
break;
}
}
std::vector<int> rand_column_families =
GenerateColumnFamilies(FLAGS_column_families, rand_column_family);
if (thread->rand.OneInOpt(FLAGS_flush_one_in)) {
Status status = TestFlush(rand_column_families);
if (!status.ok()) {
fprintf(stdout, "Unable to perform Flush(): %s\n",
status.ToString().c_str());
}
}
// Verify GetLiveFiles with a 1 in N chance.
if (thread->rand.OneInOpt(FLAGS_get_live_files_one_in) &&
!FLAGS_write_fault_one_in) {
Status status = VerifyGetLiveFiles();
ProcessStatus(shared, "VerifyGetLiveFiles", status);
}
// Verify GetSortedWalFiles with a 1 in N chance.
if (thread->rand.OneInOpt(FLAGS_get_sorted_wal_files_one_in)) {