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rocksdb/db_stress_tool/no_batched_ops_stress.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 "db_stress_tool/expected_state.h"
#ifdef GFLAGS
#include "db_stress_tool/db_stress_common.h"
#include "rocksdb/utilities/transaction_db.h"
#include "utilities/fault_injection_fs.h"
namespace ROCKSDB_NAMESPACE {
class NonBatchedOpsStressTest : public StressTest {
public:
NonBatchedOpsStressTest() {}
virtual ~NonBatchedOpsStressTest() {}
void VerifyDb(ThreadState* thread) const override {
// This `ReadOptions` is for validation purposes. Ignore
// `FLAGS_rate_limit_user_ops` to avoid slowing any validation.
ReadOptions options(FLAGS_verify_checksum, true);
std::string ts_str;
Slice ts;
if (FLAGS_user_timestamp_size > 0) {
ts_str = GetNowNanos();
ts = ts_str;
options.timestamp = &ts;
}
auto shared = thread->shared;
const int64_t max_key = shared->GetMaxKey();
const int64_t keys_per_thread = max_key / shared->GetNumThreads();
int64_t start = keys_per_thread * thread->tid;
int64_t end = start + keys_per_thread;
uint64_t prefix_to_use =
(FLAGS_prefix_size < 0) ? 1 : static_cast<size_t>(FLAGS_prefix_size);
if (thread->tid == shared->GetNumThreads() - 1) {
end = max_key;
}
for (size_t cf = 0; cf < column_families_.size(); ++cf) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
enum class VerificationMethod {
kIterator,
kGet,
kGetEntity,
kMultiGet,
kMultiGetEntity,
kGetMergeOperands,
// Add any new items above kNumberOfMethods
kNumberOfMethods
};
constexpr int num_methods =
static_cast<int>(VerificationMethod::kNumberOfMethods);
const VerificationMethod method =
static_cast<VerificationMethod>(thread->rand.Uniform(
(FLAGS_user_timestamp_size > 0) ? num_methods - 1 : num_methods));
if (method == VerificationMethod::kIterator) {
std::unique_ptr<Iterator> iter(
db_->NewIterator(options, column_families_[cf]));
std::string seek_key = Key(start);
iter->Seek(seek_key);
Slice prefix(seek_key.data(), prefix_to_use);
for (int64_t i = start; i < end; ++i) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
const std::string key = Key(i);
const Slice k(key);
const Slice pfx(key.data(), prefix_to_use);
// Reseek when the prefix changes
if (prefix_to_use > 0 && prefix.compare(pfx) != 0) {
iter->Seek(k);
seek_key = key;
prefix = Slice(seek_key.data(), prefix_to_use);
}
Status s = iter->status();
std::string from_db;
if (iter->Valid()) {
const int diff = iter->key().compare(k);
if (diff > 0) {
s = Status::NotFound();
} else if (diff == 0) {
if (!VerifyWideColumns(iter->value(), iter->columns())) {
VerificationAbort(shared, static_cast<int>(cf), i,
iter->value(), iter->columns());
}
from_db = iter->value().ToString();
iter->Next();
} else {
assert(diff < 0);
VerificationAbort(shared, "An out of range key was found",
static_cast<int>(cf), i);
}
} else {
// The iterator found no value for the key in question, so do not
// move to the next item in the iterator
s = Status::NotFound();
}
VerifyOrSyncValue(static_cast<int>(cf), i, options, shared, from_db,
/* msg_prefix */ "Iterator verification", s);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i),
from_db.data(), from_db.size());
}
}
} else if (method == VerificationMethod::kGet) {
for (int64_t i = start; i < end; ++i) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
const std::string key = Key(i);
std::string from_db;
Status s = db_->Get(options, column_families_[cf], key, &from_db);
VerifyOrSyncValue(static_cast<int>(cf), i, options, shared, from_db,
/* msg_prefix */ "Get verification", s);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i),
from_db.data(), from_db.size());
}
}
} else if (method == VerificationMethod::kGetEntity) {
for (int64_t i = start; i < end; ++i) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
const std::string key = Key(i);
PinnableWideColumns result;
Status s =
db_->GetEntity(options, column_families_[cf], key, &result);
std::string from_db;
if (s.ok()) {
const WideColumns& columns = result.columns();
if (!columns.empty() &&
columns.front().name() == kDefaultWideColumnName) {
from_db = columns.front().value().ToString();
}
if (!VerifyWideColumns(columns)) {
VerificationAbort(shared, static_cast<int>(cf), i, from_db,
columns);
}
}
VerifyOrSyncValue(static_cast<int>(cf), i, options, shared, from_db,
/* msg_prefix */ "GetEntity verification", s);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i),
from_db.data(), from_db.size());
}
}
} else if (method == VerificationMethod::kMultiGet) {
for (int64_t i = start; i < end;) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
// Keep the batch size to some reasonable value
size_t batch_size = thread->rand.Uniform(128) + 1;
batch_size = std::min<size_t>(batch_size, end - i);
std::vector<std::string> key_strs(batch_size);
std::vector<Slice> keys(batch_size);
std::vector<PinnableSlice> values(batch_size);
std::vector<Status> statuses(batch_size);
for (size_t j = 0; j < batch_size; ++j) {
key_strs[j] = Key(i + j);
keys[j] = Slice(key_strs[j]);
}
db_->MultiGet(options, column_families_[cf], batch_size, keys.data(),
values.data(), statuses.data());
for (size_t j = 0; j < batch_size; ++j) {
const std::string from_db = values[j].ToString();
VerifyOrSyncValue(static_cast<int>(cf), i + j, options, shared,
from_db, /* msg_prefix */ "MultiGet verification",
statuses[j]);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i + j),
from_db.data(), from_db.size());
}
}
i += batch_size;
}
} else if (method == VerificationMethod::kMultiGetEntity) {
for (int64_t i = start; i < end;) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
// Keep the batch size to some reasonable value
size_t batch_size = thread->rand.Uniform(128) + 1;
batch_size = std::min<size_t>(batch_size, end - i);
std::vector<std::string> key_strs(batch_size);
std::vector<Slice> keys(batch_size);
std::vector<PinnableWideColumns> results(batch_size);
std::vector<Status> statuses(batch_size);
for (size_t j = 0; j < batch_size; ++j) {
key_strs[j] = Key(i + j);
keys[j] = Slice(key_strs[j]);
}
db_->MultiGetEntity(options, column_families_[cf], batch_size,
keys.data(), results.data(), statuses.data());
for (size_t j = 0; j < batch_size; ++j) {
std::string from_db;
if (statuses[j].ok()) {
const WideColumns& columns = results[j].columns();
if (!columns.empty() &&
columns.front().name() == kDefaultWideColumnName) {
from_db = columns.front().value().ToString();
}
if (!VerifyWideColumns(columns)) {
VerificationAbort(shared, static_cast<int>(cf), i, from_db,
columns);
}
}
VerifyOrSyncValue(
static_cast<int>(cf), i + j, options, shared, from_db,
/* msg_prefix */ "MultiGetEntity verification", statuses[j]);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i + j),
from_db.data(), from_db.size());
}
}
i += batch_size;
}
} else {
assert(method == VerificationMethod::kGetMergeOperands);
// Start off with small size that will be increased later if necessary
std::vector<PinnableSlice> values(4);
GetMergeOperandsOptions merge_operands_info;
merge_operands_info.expected_max_number_of_operands =
static_cast<int>(values.size());
for (int64_t i = start; i < end; ++i) {
if (thread->shared->HasVerificationFailedYet()) {
break;
}
const std::string key = Key(i);
const Slice k(key);
std::string from_db;
int number_of_operands = 0;
Status s = db_->GetMergeOperands(options, column_families_[cf], k,
values.data(), &merge_operands_info,
&number_of_operands);
if (s.IsIncomplete()) {
// Need to resize values as there are more than values.size() merge
// operands on this key. Should only happen a few times when we
// encounter a key that had more merge operands than any key seen so
// far
values.resize(number_of_operands);
merge_operands_info.expected_max_number_of_operands =
static_cast<int>(number_of_operands);
s = db_->GetMergeOperands(options, column_families_[cf], k,
values.data(), &merge_operands_info,
&number_of_operands);
}
// Assumed here that GetMergeOperands always sets number_of_operand
if (number_of_operands) {
from_db = values[number_of_operands - 1].ToString();
}
VerifyOrSyncValue(static_cast<int>(cf), i, options, shared, from_db,
/* msg_prefix */ "GetMergeOperands verification",
s);
if (!from_db.empty()) {
PrintKeyValue(static_cast<int>(cf), static_cast<uint32_t>(i),
from_db.data(), from_db.size());
}
}
}
}
}
void ContinuouslyVerifyDb(ThreadState* thread) const override {
if (!cmp_db_) {
return;
}
assert(cmp_db_);
assert(!cmp_cfhs_.empty());
Status s = cmp_db_->TryCatchUpWithPrimary();
if (!s.ok()) {
assert(false);
exit(1);
}
const auto checksum_column_family = [](Iterator* iter,
uint32_t* checksum) -> Status {
assert(nullptr != checksum);
uint32_t ret = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ret = crc32c::Extend(ret, iter->key().data(), iter->key().size());
ret = crc32c::Extend(ret, iter->value().data(), iter->value().size());
}
*checksum = ret;
return iter->status();
};
auto* shared = thread->shared;
assert(shared);
const int64_t max_key = shared->GetMaxKey();
ReadOptions read_opts(FLAGS_verify_checksum, true);
std::string ts_str;
Slice ts;
if (FLAGS_user_timestamp_size > 0) {
ts_str = GetNowNanos();
ts = ts_str;
read_opts.timestamp = &ts;
}
static Random64 rand64(shared->GetSeed());
{
uint32_t crc = 0;
std::unique_ptr<Iterator> it(cmp_db_->NewIterator(read_opts));
s = checksum_column_family(it.get(), &crc);
if (!s.ok()) {
fprintf(stderr, "Computing checksum of default cf: %s\n",
s.ToString().c_str());
assert(false);
}
}
for (auto* handle : cmp_cfhs_) {
if (thread->rand.OneInOpt(3)) {
// Use Get()
uint64_t key = rand64.Uniform(static_cast<uint64_t>(max_key));
std::string key_str = Key(key);
std::string value;
std::string key_ts;
s = cmp_db_->Get(read_opts, handle, key_str, &value,
FLAGS_user_timestamp_size > 0 ? &key_ts : nullptr);
s.PermitUncheckedError();
} else {
// Use range scan
std::unique_ptr<Iterator> iter(cmp_db_->NewIterator(read_opts, handle));
uint32_t rnd = (thread->rand.Next()) % 4;
if (0 == rnd) {
// SeekToFirst() + Next()*5
read_opts.total_order_seek = true;
iter->SeekToFirst();
for (int i = 0; i < 5 && iter->Valid(); ++i, iter->Next()) {
}
} else if (1 == rnd) {
// SeekToLast() + Prev()*5
read_opts.total_order_seek = true;
iter->SeekToLast();
for (int i = 0; i < 5 && iter->Valid(); ++i, iter->Prev()) {
}
} else if (2 == rnd) {
// Seek() +Next()*5
uint64_t key = rand64.Uniform(static_cast<uint64_t>(max_key));
std::string key_str = Key(key);
iter->Seek(key_str);
for (int i = 0; i < 5 && iter->Valid(); ++i, iter->Next()) {
}
} else {
// SeekForPrev() + Prev()*5
uint64_t key = rand64.Uniform(static_cast<uint64_t>(max_key));
std::string key_str = Key(key);
iter->SeekForPrev(key_str);
for (int i = 0; i < 5 && iter->Valid(); ++i, iter->Prev()) {
}
}
}
}
}
void MaybeClearOneColumnFamily(ThreadState* thread) override {
if (FLAGS_column_families > 1) {
if (thread->rand.OneInOpt(FLAGS_clear_column_family_one_in)) {
// drop column family and then create it again (can't drop default)
int cf = thread->rand.Next() % (FLAGS_column_families - 1) + 1;
std::string new_name =
std::to_string(new_column_family_name_.fetch_add(1));
{
MutexLock l(thread->shared->GetMutex());
fprintf(
stdout,
"[CF %d] Dropping and recreating column family. new name: %s\n",
cf, new_name.c_str());
}
thread->shared->LockColumnFamily(cf);
Status s = db_->DropColumnFamily(column_families_[cf]);
delete column_families_[cf];
if (!s.ok()) {
fprintf(stderr, "dropping column family error: %s\n",
s.ToString().c_str());
std::terminate();
}
s = db_->CreateColumnFamily(ColumnFamilyOptions(options_), new_name,
&column_families_[cf]);
column_family_names_[cf] = new_name;
thread->shared->ClearColumnFamily(cf);
if (!s.ok()) {
fprintf(stderr, "creating column family error: %s\n",
s.ToString().c_str());
std::terminate();
}
thread->shared->UnlockColumnFamily(cf);
}
}
}
bool ShouldAcquireMutexOnKey() const override { return true; }
bool IsStateTracked() const override { return true; }
Status TestGet(ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
auto cfh = column_families_[rand_column_families[0]];
std::string key_str = Key(rand_keys[0]);
Slice key = key_str;
std::string from_db;
int error_count = 0;
if (fault_fs_guard) {
fault_fs_guard->EnableErrorInjection();
SharedState::ignore_read_error = false;
}
ReadOptions read_opts_copy = read_opts;
std::string read_ts_str;
Slice read_ts_slice;
if (FLAGS_user_timestamp_size > 0) {
read_ts_str = GetNowNanos();
read_ts_slice = read_ts_str;
read_opts_copy.timestamp = &read_ts_slice;
}
bool read_older_ts = MaybeUseOlderTimestampForPointLookup(
thread, read_ts_str, read_ts_slice, read_opts_copy);
const ExpectedValue pre_read_expected_value =
thread->shared->Get(rand_column_families[0], rand_keys[0]);
Status s = db_->Get(read_opts_copy, cfh, key, &from_db);
const ExpectedValue post_read_expected_value =
thread->shared->Get(rand_column_families[0], rand_keys[0]);
if (fault_fs_guard) {
error_count = fault_fs_guard->GetAndResetErrorCount();
}
if (s.ok()) {
if (fault_fs_guard) {
if (error_count && !SharedState::ignore_read_error) {
// Grab mutex so multiple thread don't try to print the
// stack trace at the same time
MutexLock l(thread->shared->GetMutex());
fprintf(stderr, "Didn't get expected error from Get\n");
fprintf(stderr, "Callstack that injected the fault\n");
fault_fs_guard->PrintFaultBacktrace();
std::terminate();
}
}
// found case
thread->stats.AddGets(1, 1);
// we only have the latest expected state
if (!FLAGS_skip_verifydb && !read_older_ts) {
if (ExpectedValueHelper::MustHaveNotExisted(pre_read_expected_value,
post_read_expected_value)) {
thread->shared->SetVerificationFailure();
fprintf(stderr,
"error : inconsistent values for key %s: Get returns %s, "
"but expected state is \"deleted\".\n",
key.ToString(true).c_str(), StringToHex(from_db).c_str());
}
Slice from_db_slice(from_db);
uint32_t value_base_from_db = GetValueBase(from_db_slice);
if (!ExpectedValueHelper::InExpectedValueBaseRange(
value_base_from_db, pre_read_expected_value,
post_read_expected_value)) {
thread->shared->SetVerificationFailure();
fprintf(stderr,
"error : inconsistent values for key %s: Get returns %s with "
"value base %d that falls out of expected state's value base "
"range.\n",
key.ToString(true).c_str(), StringToHex(from_db).c_str(),
value_base_from_db);
}
}
} else if (s.IsNotFound()) {
// not found case
thread->stats.AddGets(1, 0);
if (!FLAGS_skip_verifydb && !read_older_ts) {
if (ExpectedValueHelper::MustHaveExisted(pre_read_expected_value,
post_read_expected_value)) {
thread->shared->SetVerificationFailure();
fprintf(stderr,
"error : inconsistent values for key %s: expected state has "
"the key, Get() returns NotFound.\n",
key.ToString(true).c_str());
}
}
} else {
if (error_count == 0) {
// errors case
thread->stats.AddErrors(1);
} else {
thread->stats.AddVerifiedErrors(1);
}
}
if (fault_fs_guard) {
fault_fs_guard->DisableErrorInjection();
}
return s;
}
std::vector<Status> TestMultiGet(
ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
size_t num_keys = rand_keys.size();
std::vector<std::string> key_str;
std::vector<Slice> keys;
key_str.reserve(num_keys);
keys.reserve(num_keys);
std::vector<PinnableSlice> values(num_keys);
std::vector<Status> statuses(num_keys);
// When Flags_use_txn is enabled, we also do a read your write check.
std::vector<std::optional<ExpectedValue>> ryw_expected_values;
ryw_expected_values.reserve(num_keys);
SharedState* shared = thread->shared;
int column_family = rand_column_families[0];
ColumnFamilyHandle* cfh = column_families_[column_family];
int error_count = 0;
// Do a consistency check between Get and MultiGet. Don't do it too
// often as it will slow db_stress down
bool do_consistency_check = thread->rand.OneIn(4);
ReadOptions readoptionscopy = read_opts;
if (do_consistency_check) {
readoptionscopy.snapshot = db_->GetSnapshot();
}
std::string read_ts_str;
Slice read_ts_slice;
MaybeUseOlderTimestampForPointLookup(thread, read_ts_str, read_ts_slice,
readoptionscopy);
readoptionscopy.rate_limiter_priority =
FLAGS_rate_limit_user_ops ? Env::IO_USER : Env::IO_TOTAL;
// To appease clang analyzer
const bool use_txn = FLAGS_use_txn;
// Create a transaction in order to write some data. The purpose is to
// exercise WriteBatchWithIndex::MultiGetFromBatchAndDB. The transaction
// will be rolled back once MultiGet returns.
Transaction* txn = nullptr;
if (use_txn) {
WriteOptions wo;
if (FLAGS_rate_limit_auto_wal_flush) {
wo.rate_limiter_priority = Env::IO_USER;
}
Status s = NewTxn(wo, &txn);
if (!s.ok()) {
fprintf(stderr, "NewTxn: %s\n", s.ToString().c_str());
std::terminate();
}
}
for (size_t i = 0; i < num_keys; ++i) {
uint64_t rand_key = rand_keys[i];
key_str.emplace_back(Key(rand_key));
keys.emplace_back(key_str.back());
if (use_txn) {
if (!shared->AllowsOverwrite(rand_key) &&
shared->Exists(column_family, rand_key)) {
// Just do read your write checks for keys that allow overwrites.
ryw_expected_values.push_back(std::nullopt);
continue;
}
// With a 1 in 10 probability, insert the just added key in the batch
// into the transaction. This will create an overlap with the MultiGet
// keys and exercise some corner cases in the code
if (thread->rand.OneIn(10)) {
int op = thread->rand.Uniform(2);
Status s;
assert(txn);
switch (op) {
case 0:
case 1: {
ExpectedValue put_value;
put_value.Put(false /* pending */);
ryw_expected_values.emplace_back(put_value);
char value[100];
size_t sz =
GenerateValue(put_value.GetValueBase(), value, sizeof(value));
Slice v(value, sz);
if (op == 0) {
s = txn->Put(cfh, keys.back(), v);
} else {
s = txn->Merge(cfh, keys.back(), v);
}
break;
}
case 2: {
ExpectedValue delete_value;
delete_value.Delete(false /* pending */);
ryw_expected_values.emplace_back(delete_value);
s = txn->Delete(cfh, keys.back());
break;
}
default:
assert(false);
}
if (!s.ok()) {
fprintf(stderr, "Transaction put: %s\n", s.ToString().c_str());
std::terminate();
}
} else {
ryw_expected_values.push_back(std::nullopt);
}
}
}
if (!use_txn) {
if (fault_fs_guard) {
fault_fs_guard->EnableErrorInjection();
SharedState::ignore_read_error = false;
}
db_->MultiGet(readoptionscopy, cfh, num_keys, keys.data(), values.data(),
statuses.data());
if (fault_fs_guard) {
error_count = fault_fs_guard->GetAndResetErrorCount();
}
} else {
assert(txn);
txn->MultiGet(readoptionscopy, cfh, num_keys, keys.data(), values.data(),
statuses.data());
}
if (fault_fs_guard && error_count && !SharedState::ignore_read_error) {
int stat_nok = 0;
for (const auto& s : statuses) {
if (!s.ok() && !s.IsNotFound()) {
stat_nok++;
}
}
if (stat_nok < error_count) {
// Grab mutex so multiple thread don't try to print the
// stack trace at the same time
MutexLock l(thread->shared->GetMutex());
fprintf(stderr, "Didn't get expected error from MultiGet. \n");
fprintf(stderr, "num_keys %zu Expected %d errors, seen %d\n", num_keys,
error_count, stat_nok);
fprintf(stderr, "Callstack that injected the fault\n");
fault_fs_guard->PrintFaultBacktrace();
std::terminate();
}
}
if (fault_fs_guard) {
fault_fs_guard->DisableErrorInjection();
}
auto ryw_check =
[](const Slice& key, const PinnableSlice& value, const Status& s,
const std::optional<ExpectedValue>& ryw_expected_value) -> bool {
if (!ryw_expected_value.has_value()) {
return true;
}
const ExpectedValue& expected = ryw_expected_value.value();
char expected_value[100];
if (s.ok() &&
ExpectedValueHelper::MustHaveNotExisted(expected, expected)) {
fprintf(stderr,
"MultiGet returned value different from what was "
"written for key %s\n",
key.ToString(true).c_str());
fprintf(stderr,
"MultiGet returned ok, transaction has non-committed "
"delete.\n");
return false;
} else if (s.IsNotFound() &&
ExpectedValueHelper::MustHaveExisted(expected, expected)) {
fprintf(stderr,
"MultiGet returned value different from what was "
"written for key %s\n",
key.ToString(true).c_str());
fprintf(stderr,
"MultiGet returned not found, transaction has "
"non-committed value.\n");
return false;
} else if (s.ok() &&
ExpectedValueHelper::MustHaveExisted(expected, expected)) {
Slice from_txn_slice(value);
size_t sz = GenerateValue(expected.GetValueBase(), expected_value,
sizeof(expected_value));
Slice expected_value_slice(expected_value, sz);
if (expected_value_slice.compare(from_txn_slice) == 0) {
return true;
}
fprintf(stderr,
"MultiGet returned value different from what was "
"written for key %s\n",
key.ToString(true /* hex */).c_str());
fprintf(stderr, "MultiGet returned value %s\n",
from_txn_slice.ToString(true /* hex */).c_str());
fprintf(stderr, "Transaction has non-committed value %s\n",
expected_value_slice.ToString(true /* hex */).c_str());
return false;
}
return true;
};
auto check_multiget =
[&](const Slice& key, const PinnableSlice& expected_value,
const Status& s,
const std::optional<ExpectedValue>& ryw_expected_value) -> bool {
bool is_consistent = true;
bool is_ryw_correct = true;
// Only do the consistency check if no error was injected and
// MultiGet didn't return an unexpected error. If test does not use
// transaction, the consistency check for each key included check results
// from db `Get` and db `MultiGet` are consistent.
// If test use transaction, after consistency check, also do a read your
// own write check.
if (do_consistency_check && !error_count && (s.ok() || s.IsNotFound())) {
Status tmp_s;
std::string value;
if (use_txn) {
assert(txn);
tmp_s = txn->Get(readoptionscopy, cfh, key, &value);
} else {
tmp_s = db_->Get(readoptionscopy, cfh, key, &value);
}
if (!tmp_s.ok() && !tmp_s.IsNotFound()) {
fprintf(stderr, "Get error: %s\n", s.ToString().c_str());
is_consistent = false;
} else if (!s.ok() && tmp_s.ok()) {
fprintf(stderr, "MultiGet returned different results with key %s\n",
key.ToString(true).c_str());
fprintf(stderr, "Get returned ok, MultiGet returned not found\n");
is_consistent = false;
} else if (s.ok() && tmp_s.IsNotFound()) {
fprintf(stderr, "MultiGet returned different results with key %s\n",
key.ToString(true).c_str());
fprintf(stderr, "MultiGet returned ok, Get returned not found\n");
is_consistent = false;
} else if (s.ok() && value != expected_value.ToString()) {
fprintf(stderr, "MultiGet returned different results with key %s\n",
key.ToString(true).c_str());
fprintf(stderr, "MultiGet returned value %s\n",
expected_value.ToString(true).c_str());
fprintf(stderr, "Get returned value %s\n",
Slice(value).ToString(true /* hex */).c_str());
is_consistent = false;
}
}
// If test uses transaction, continue to do a read your own write check.
if (is_consistent && use_txn) {
is_ryw_correct = ryw_check(key, expected_value, s, ryw_expected_value);
}
if (!is_consistent) {
fprintf(stderr, "TestMultiGet error: is_consistent is false\n");
thread->stats.AddErrors(1);
// Fail fast to preserve the DB state
thread->shared->SetVerificationFailure();
return false;
} else if (!is_ryw_correct) {
fprintf(stderr, "TestMultiGet error: is_ryw_correct is false\n");
thread->stats.AddErrors(1);
// Fail fast to preserve the DB state
thread->shared->SetVerificationFailure();
return false;
} else if (s.ok()) {
// found case
thread->stats.AddGets(1, 1);
} else if (s.IsNotFound()) {
// not found case
thread->stats.AddGets(1, 0);
} else if (s.IsMergeInProgress() && use_txn) {
// With txn this is sometimes expected.
thread->stats.AddGets(1, 1);
} else {
if (error_count == 0) {
// errors case
fprintf(stderr, "MultiGet error: %s\n", s.ToString().c_str());
thread->stats.AddErrors(1);
} else {
thread->stats.AddVerifiedErrors(1);
}
}
return true;
};
size_t num_of_keys = keys.size();
assert(values.size() == num_of_keys);
assert(statuses.size() == num_of_keys);
for (size_t i = 0; i < num_of_keys; ++i) {
bool check_result = true;
if (use_txn) {
assert(ryw_expected_values.size() == num_of_keys);
check_result = check_multiget(keys[i], values[i], statuses[i],
ryw_expected_values[i]);
} else {
check_result = check_multiget(keys[i], values[i], statuses[i],
std::nullopt /* ryw_expected_value */);
}
if (!check_result) {
break;
}
}
if (readoptionscopy.snapshot) {
db_->ReleaseSnapshot(readoptionscopy.snapshot);
}
if (use_txn) {
RollbackTxn(txn);
}
return statuses;
}
void TestGetEntity(ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
if (fault_fs_guard) {
fault_fs_guard->EnableErrorInjection();
SharedState::ignore_read_error = false;
}
assert(thread);
SharedState* const shared = thread->shared;
assert(shared);
assert(!rand_column_families.empty());
assert(!rand_keys.empty());
std::unique_ptr<MutexLock> lock(new MutexLock(
shared->GetMutexForKey(rand_column_families[0], rand_keys[0])));
assert(rand_column_families[0] >= 0);
assert(rand_column_families[0] < static_cast<int>(column_families_.size()));
ColumnFamilyHandle* const cfh = column_families_[rand_column_families[0]];
assert(cfh);
const std::string key = Key(rand_keys[0]);
PinnableWideColumns from_db;
const Status s = db_->GetEntity(read_opts, cfh, key, &from_db);
int error_count = 0;
if (fault_fs_guard) {
error_count = fault_fs_guard->GetAndResetErrorCount();
}
if (s.ok()) {
if (fault_fs_guard) {
if (error_count && !SharedState::ignore_read_error) {
// Grab mutex so multiple threads don't try to print the
// stack trace at the same time
MutexLock l(shared->GetMutex());
fprintf(stderr, "Didn't get expected error from GetEntity\n");
fprintf(stderr, "Call stack that injected the fault\n");
fault_fs_guard->PrintFaultBacktrace();
std::terminate();
}
}
thread->stats.AddGets(1, 1);
if (!FLAGS_skip_verifydb) {
const WideColumns& columns = from_db.columns();
ExpectedValue expected =
shared->Get(rand_column_families[0], rand_keys[0]);
if (!VerifyWideColumns(columns)) {
shared->SetVerificationFailure();
fprintf(stderr,
"error : inconsistent columns returned by GetEntity for key "
"%s: %s\n",
StringToHex(key).c_str(), WideColumnsToHex(columns).c_str());
} else if (ExpectedValueHelper::MustHaveNotExisted(expected,
expected)) {
shared->SetVerificationFailure();
fprintf(
stderr,
"error : inconsistent values for key %s: GetEntity returns %s, "
"expected state does not have the key.\n",
StringToHex(key).c_str(), WideColumnsToHex(columns).c_str());
}
}
} else if (s.IsNotFound()) {
thread->stats.AddGets(1, 0);
if (!FLAGS_skip_verifydb) {
ExpectedValue expected =
shared->Get(rand_column_families[0], rand_keys[0]);
if (ExpectedValueHelper::MustHaveExisted(expected, expected)) {
shared->SetVerificationFailure();
fprintf(stderr,
"error : inconsistent values for key %s: expected state has "
"the key, GetEntity returns NotFound.\n",
StringToHex(key).c_str());
}
}
} else {
if (error_count == 0) {
thread->stats.AddErrors(1);
} else {
thread->stats.AddVerifiedErrors(1);
}
}
if (fault_fs_guard) {
fault_fs_guard->DisableErrorInjection();
}
}
void TestMultiGetEntity(ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
assert(thread);
ManagedSnapshot snapshot_guard(db_);
ReadOptions read_opts_copy(read_opts);
read_opts_copy.snapshot = snapshot_guard.snapshot();
assert(!rand_column_families.empty());
assert(rand_column_families[0] >= 0);
assert(rand_column_families[0] < static_cast<int>(column_families_.size()));
ColumnFamilyHandle* const cfh = column_families_[rand_column_families[0]];
assert(cfh);
assert(!rand_keys.empty());
const size_t num_keys = rand_keys.size();
std::vector<std::string> keys(num_keys);
std::vector<Slice> key_slices(num_keys);
for (size_t i = 0; i < num_keys; ++i) {
keys[i] = Key(rand_keys[i]);
key_slices[i] = keys[i];
}
std::vector<PinnableWideColumns> results(num_keys);
std::vector<Status> statuses(num_keys);
if (fault_fs_guard) {
fault_fs_guard->EnableErrorInjection();
SharedState::ignore_read_error = false;
}
db_->MultiGetEntity(read_opts_copy, cfh, num_keys, key_slices.data(),
results.data(), statuses.data());
int error_count = 0;
if (fault_fs_guard) {
error_count = fault_fs_guard->GetAndResetErrorCount();
if (error_count && !SharedState::ignore_read_error) {
int stat_nok = 0;
for (const auto& s : statuses) {
if (!s.ok() && !s.IsNotFound()) {
stat_nok++;
}
}
if (stat_nok < error_count) {
// Grab mutex so multiple threads don't try to print the
// stack trace at the same time
assert(thread->shared);
MutexLock l(thread->shared->GetMutex());
fprintf(stderr, "Didn't get expected error from MultiGetEntity\n");
fprintf(stderr, "num_keys %zu Expected %d errors, seen %d\n",
num_keys, error_count, stat_nok);
fprintf(stderr, "Call stack that injected the fault\n");
fault_fs_guard->PrintFaultBacktrace();
std::terminate();
}
}
fault_fs_guard->DisableErrorInjection();
}
const bool check_get_entity = !error_count && thread->rand.OneIn(4);
for (size_t i = 0; i < num_keys; ++i) {
const Status& s = statuses[i];
bool is_consistent = true;
if (s.ok() && !VerifyWideColumns(results[i].columns())) {
fprintf(
stderr,
"error : inconsistent columns returned by MultiGetEntity for key "
"%s: %s\n",
StringToHex(keys[i]).c_str(),
WideColumnsToHex(results[i].columns()).c_str());
is_consistent = false;
} else if (check_get_entity && (s.ok() || s.IsNotFound())) {
PinnableWideColumns cmp_result;
const Status cmp_s =
db_->GetEntity(read_opts_copy, cfh, key_slices[i], &cmp_result);
if (!cmp_s.ok() && !cmp_s.IsNotFound()) {
fprintf(stderr, "GetEntity error: %s\n", cmp_s.ToString().c_str());
is_consistent = false;
} else if (cmp_s.IsNotFound()) {
if (s.ok()) {
fprintf(stderr,
"Inconsistent results for key %s: MultiGetEntity returned "
"ok, GetEntity returned not found\n",
StringToHex(keys[i]).c_str());
is_consistent = false;
}
} else {
assert(cmp_s.ok());
if (s.IsNotFound()) {
fprintf(stderr,
"Inconsistent results for key %s: MultiGetEntity returned "
"not found, GetEntity returned ok\n",
StringToHex(keys[i]).c_str());
is_consistent = false;
} else {
assert(s.ok());
if (results[i] != cmp_result) {
fprintf(
stderr,
"Inconsistent results for key %s: MultiGetEntity returned "
"%s, GetEntity returned %s\n",
StringToHex(keys[i]).c_str(),
WideColumnsToHex(results[i].columns()).c_str(),
WideColumnsToHex(cmp_result.columns()).c_str());
is_consistent = false;
}
}
}
}
if (!is_consistent) {
fprintf(stderr,
"TestMultiGetEntity error: results are not consistent\n");
thread->stats.AddErrors(1);
// Fail fast to preserve the DB state
thread->shared->SetVerificationFailure();
break;
} else if (s.ok()) {
thread->stats.AddGets(1, 1);
} else if (s.IsNotFound()) {
thread->stats.AddGets(1, 0);
} else {
if (error_count == 0) {
fprintf(stderr, "MultiGetEntity error: %s\n", s.ToString().c_str());
thread->stats.AddErrors(1);
} else {
thread->stats.AddVerifiedErrors(1);
}
}
}
}
Status TestPrefixScan(ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
assert(!rand_column_families.empty());
assert(!rand_keys.empty());
ColumnFamilyHandle* const cfh = column_families_[rand_column_families[0]];
assert(cfh);
const std::string key = Key(rand_keys[0]);
const Slice prefix(key.data(), FLAGS_prefix_size);
std::string upper_bound;
Slice ub_slice;
ReadOptions ro_copy = read_opts;
// Get the next prefix first and then see if we want to set upper bound.
// We'll use the next prefix in an assertion later on
if (GetNextPrefix(prefix, &upper_bound) && thread->rand.OneIn(2)) {
// For half of the time, set the upper bound to the next prefix
ub_slice = Slice(upper_bound);
ro_copy.iterate_upper_bound = &ub_slice;
}
std::string read_ts_str;
Slice read_ts_slice;
MaybeUseOlderTimestampForRangeScan(thread, read_ts_str, read_ts_slice,
ro_copy);
std::unique_ptr<Iterator> iter(db_->NewIterator(ro_copy, cfh));
uint64_t count = 0;
Status s;
if (fault_fs_guard) {
fault_fs_guard->EnableErrorInjection();
SharedState::ignore_read_error = false;
}
for (iter->Seek(prefix); iter->Valid() && iter->key().starts_with(prefix);
iter->Next()) {
++count;
// When iter_start_ts is set, iterator exposes internal keys, including
// tombstones; however, we want to perform column validation only for
// value-like types.
if (ro_copy.iter_start_ts) {
const ValueType value_type = ExtractValueType(iter->key());
if (value_type != kTypeValue && value_type != kTypeBlobIndex &&
value_type != kTypeWideColumnEntity) {
continue;
}
}
if (!VerifyWideColumns(iter->value(), iter->columns())) {
s = Status::Corruption("Value and columns inconsistent",
DebugString(iter->value(), iter->columns()));
break;
}
}
if (ro_copy.iter_start_ts == nullptr) {
assert(count <= GetPrefixKeyCount(prefix.ToString(), upper_bound));
}
if (s.ok()) {
s = iter->status();
}
uint64_t error_count = 0;
if (fault_fs_guard) {
error_count = fault_fs_guard->GetAndResetErrorCount();
}
if (!s.ok() && (!fault_fs_guard || (fault_fs_guard && !error_count))) {
fprintf(stderr, "TestPrefixScan error: %s\n", s.ToString().c_str());
thread->stats.AddErrors(1);
return s;
}
if (fault_fs_guard) {
fault_fs_guard->DisableErrorInjection();
}
thread->stats.AddPrefixes(1, count);
return Status::OK();
}
Status TestPut(ThreadState* thread, WriteOptions& write_opts,
const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys,
char (&value)[100]) override {
assert(!rand_column_families.empty());
assert(!rand_keys.empty());
auto shared = thread->shared;
assert(shared);
const int64_t max_key = shared->GetMaxKey();
int64_t rand_key = rand_keys[0];
int rand_column_family = rand_column_families[0];
std::string write_ts;
std::unique_ptr<MutexLock> lock(
new MutexLock(shared->GetMutexForKey(rand_column_family, rand_key)));
while (!shared->AllowsOverwrite(rand_key) &&
(FLAGS_use_merge || shared->Exists(rand_column_family, rand_key))) {
lock.reset();
rand_key = thread->rand.Next() % max_key;
rand_column_family = thread->rand.Next() % FLAGS_column_families;
lock.reset(
new MutexLock(shared->GetMutexForKey(rand_column_family, rand_key)));
if (FLAGS_user_timestamp_size > 0) {
write_ts = GetNowNanos();
}
}
if (write_ts.empty() && FLAGS_user_timestamp_size) {
write_ts = GetNowNanos();
}
const std::string k = Key(rand_key);
ColumnFamilyHandle* const cfh = column_families_[rand_column_family];
assert(cfh);
if (FLAGS_verify_before_write) {
std::string from_db;
Status s = db_->Get(read_opts, cfh, k, &from_db);
if (!VerifyOrSyncValue(rand_column_family, rand_key, read_opts, shared,
/* msg_prefix */ "Pre-Put Get verification",
from_db, s)) {
return s;
}
}
PendingExpectedValue pending_expected_value =
shared->PreparePut(rand_column_family, rand_key);
const uint32_t value_base = pending_expected_value.GetFinalValueBase();
const size_t sz = GenerateValue(value_base, value, sizeof(value));
const Slice v(value, sz);
Status s;
if (FLAGS_use_merge) {
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size == 0) {
s = db_->Merge(write_opts, cfh, k, v);
} else {
s = db_->Merge(write_opts, cfh, k, write_ts, v);
}
} else {
Transaction* txn;
s = NewTxn(write_opts, &txn);
if (s.ok()) {
s = txn->Merge(cfh, k, v);
if (s.ok()) {
s = CommitTxn(txn, thread);
}
}
}
} else if (FLAGS_use_put_entity_one_in > 0 &&
(value_base % FLAGS_use_put_entity_one_in) == 0) {
s = db_->PutEntity(write_opts, cfh, k,
GenerateWideColumns(value_base, v));
} else {
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size == 0) {
s = db_->Put(write_opts, cfh, k, v);
} else {
s = db_->Put(write_opts, cfh, k, write_ts, v);
}
} else {
Transaction* txn;
s = NewTxn(write_opts, &txn);
if (s.ok()) {
s = txn->Put(cfh, k, v);
if (s.ok()) {
s = CommitTxn(txn, thread);
}
}
}
}
pending_expected_value.Commit();
if (!s.ok()) {
if (FLAGS_injest_error_severity >= 2) {
if (!is_db_stopped_ && s.severity() >= Status::Severity::kFatalError) {
is_db_stopped_ = true;
} else if (!is_db_stopped_ ||
s.severity() < Status::Severity::kFatalError) {
fprintf(stderr, "put or merge error: %s\n", s.ToString().c_str());
std::terminate();
}
} else {
fprintf(stderr, "put or merge error: %s\n", s.ToString().c_str());
std::terminate();
}
}
thread->stats.AddBytesForWrites(1, sz);
PrintKeyValue(rand_column_family, static_cast<uint32_t>(rand_key), value,
sz);
return s;
}
Status TestDelete(ThreadState* thread, WriteOptions& write_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
int64_t rand_key = rand_keys[0];
int rand_column_family = rand_column_families[0];
auto shared = thread->shared;
std::unique_ptr<MutexLock> lock(
new MutexLock(shared->GetMutexForKey(rand_column_family, rand_key)));
// OPERATION delete
std::string write_ts_str = GetNowNanos();
Slice write_ts = write_ts_str;
std::string key_str = Key(rand_key);
Slice key = key_str;
auto cfh = column_families_[rand_column_family];
// Use delete if the key may be overwritten and a single deletion
// otherwise.
Status s;
if (shared->AllowsOverwrite(rand_key)) {
PendingExpectedValue pending_expected_value =
shared->PrepareDelete(rand_column_family, rand_key);
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size == 0) {
s = db_->Delete(write_opts, cfh, key);
} else {
s = db_->Delete(write_opts, cfh, key, write_ts);
}
} else {
Transaction* txn;
s = NewTxn(write_opts, &txn);
if (s.ok()) {
s = txn->Delete(cfh, key);
if (s.ok()) {
s = CommitTxn(txn, thread);
}
}
}
pending_expected_value.Commit();
thread->stats.AddDeletes(1);
if (!s.ok()) {
if (FLAGS_injest_error_severity >= 2) {
if (!is_db_stopped_ &&
s.severity() >= Status::Severity::kFatalError) {
is_db_stopped_ = true;
} else if (!is_db_stopped_ ||
s.severity() < Status::Severity::kFatalError) {
fprintf(stderr, "delete error: %s\n", s.ToString().c_str());
std::terminate();
}
} else {
fprintf(stderr, "delete error: %s\n", s.ToString().c_str());
std::terminate();
}
}
} else {
PendingExpectedValue pending_expected_value =
shared->PrepareSingleDelete(rand_column_family, rand_key);
if (!FLAGS_use_txn) {
if (FLAGS_user_timestamp_size == 0) {
s = db_->SingleDelete(write_opts, cfh, key);
} else {
s = db_->SingleDelete(write_opts, cfh, key, write_ts);
}
} else {
Transaction* txn;
s = NewTxn(write_opts, &txn);
if (s.ok()) {
s = txn->SingleDelete(cfh, key);
if (s.ok()) {
s = CommitTxn(txn, thread);
}
}
}
pending_expected_value.Commit();
thread->stats.AddSingleDeletes(1);
if (!s.ok()) {
if (FLAGS_injest_error_severity >= 2) {
if (!is_db_stopped_ &&
s.severity() >= Status::Severity::kFatalError) {
is_db_stopped_ = true;
} else if (!is_db_stopped_ ||
s.severity() < Status::Severity::kFatalError) {
fprintf(stderr, "single delete error: %s\n", s.ToString().c_str());
std::terminate();
}
} else {
fprintf(stderr, "single delete error: %s\n", s.ToString().c_str());
std::terminate();
}
}
}
return s;
}
Status TestDeleteRange(ThreadState* thread, WriteOptions& write_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
// OPERATION delete range
std::vector<std::unique_ptr<MutexLock>> range_locks;
// delete range does not respect disallowed overwrites. the keys for
// which overwrites are disallowed are randomly distributed so it
// could be expensive to find a range where each key allows
// overwrites.
int64_t rand_key = rand_keys[0];
int rand_column_family = rand_column_families[0];
auto shared = thread->shared;
int64_t max_key = shared->GetMaxKey();
if (rand_key > max_key - FLAGS_range_deletion_width) {
rand_key =
thread->rand.Next() % (max_key - FLAGS_range_deletion_width + 1);
}
for (int j = 0; j < FLAGS_range_deletion_width; ++j) {
if (j == 0 ||
((rand_key + j) & ((1 << FLAGS_log2_keys_per_lock) - 1)) == 0) {
range_locks.emplace_back(new MutexLock(
shared->GetMutexForKey(rand_column_family, rand_key + j)));
}
}
std::vector<PendingExpectedValue> pending_expected_values =
shared->PrepareDeleteRange(rand_column_family, rand_key,
rand_key + FLAGS_range_deletion_width);
const int covered = static_cast<int>(pending_expected_values.size());
std::string keystr = Key(rand_key);
Slice key = keystr;
auto cfh = column_families_[rand_column_family];
std::string end_keystr = Key(rand_key + FLAGS_range_deletion_width);
Slice end_key = end_keystr;
std::string write_ts_str;
Slice write_ts;
Status s;
if (FLAGS_user_timestamp_size) {
write_ts_str = GetNowNanos();
write_ts = write_ts_str;
s = db_->DeleteRange(write_opts, cfh, key, end_key, write_ts);
} else {
s = db_->DeleteRange(write_opts, cfh, key, end_key);
}
if (!s.ok()) {
if (FLAGS_injest_error_severity >= 2) {
if (!is_db_stopped_ && s.severity() >= Status::Severity::kFatalError) {
is_db_stopped_ = true;
} else if (!is_db_stopped_ ||
s.severity() < Status::Severity::kFatalError) {
fprintf(stderr, "delete range error: %s\n", s.ToString().c_str());
std::terminate();
}
} else {
fprintf(stderr, "delete range error: %s\n", s.ToString().c_str());
std::terminate();
}
}
for (PendingExpectedValue& pending_expected_value :
pending_expected_values) {
pending_expected_value.Commit();
}
thread->stats.AddRangeDeletions(1);
thread->stats.AddCoveredByRangeDeletions(covered);
return s;
}
void TestIngestExternalFile(ThreadState* thread,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
const std::string sst_filename =
FLAGS_db + "/." + std::to_string(thread->tid) + ".sst";
Status s;
if (db_stress_env->FileExists(sst_filename).ok()) {
// Maybe we terminated abnormally before, so cleanup to give this file
// ingestion a clean slate
s = db_stress_env->DeleteFile(sst_filename);
}
SstFileWriter sst_file_writer(EnvOptions(options_), options_);
if (s.ok()) {
s = sst_file_writer.Open(sst_filename);
}
int64_t key_base = rand_keys[0];
int column_family = rand_column_families[0];
std::vector<std::unique_ptr<MutexLock>> range_locks;
range_locks.reserve(FLAGS_ingest_external_file_width);
std::vector<int64_t> keys;
keys.reserve(FLAGS_ingest_external_file_width);
std::vector<uint32_t> values;
values.reserve(FLAGS_ingest_external_file_width);
std::vector<PendingExpectedValue> pending_expected_values;
pending_expected_values.reserve(FLAGS_ingest_external_file_width);
SharedState* shared = thread->shared;
assert(FLAGS_nooverwritepercent < 100);
// Grab locks, set pending state on expected values, and add keys
for (int64_t key = key_base;
s.ok() && key < shared->GetMaxKey() &&
static_cast<int32_t>(keys.size()) < FLAGS_ingest_external_file_width;
++key) {
if (key == key_base ||
(key & ((1 << FLAGS_log2_keys_per_lock) - 1)) == 0) {
range_locks.emplace_back(
new MutexLock(shared->GetMutexForKey(column_family, key)));
}
if (!shared->AllowsOverwrite(key)) {
// We could alternatively include `key` that is deleted.
continue;
}
keys.push_back(key);
PendingExpectedValue pending_expected_value =
shared->PreparePut(column_family, key);
const uint32_t value_base = pending_expected_value.GetFinalValueBase();
values.push_back(value_base);
pending_expected_values.push_back(pending_expected_value);
char value[100];
size_t value_len = GenerateValue(value_base, value, sizeof(value));
auto key_str = Key(key);
s = sst_file_writer.Put(Slice(key_str), Slice(value, value_len));
}
if (s.ok() && keys.empty()) {
return;
}
if (s.ok()) {
s = sst_file_writer.Finish();
}
if (s.ok()) {
s = db_->IngestExternalFile(column_families_[column_family],
{sst_filename}, IngestExternalFileOptions());
}
if (!s.ok()) {
fprintf(stderr, "file ingestion error: %s\n", s.ToString().c_str());
std::terminate();
}
for (size_t i = 0; i < pending_expected_values.size(); ++i) {
pending_expected_values[i].Commit();
}
}
// Given a key K, this creates an iterator which scans the range
// [K, K + FLAGS_num_iterations) forward and backward.
// Then does a random sequence of Next/Prev operations.
Status TestIterateAgainstExpected(
ThreadState* thread, const ReadOptions& read_opts,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) override {
assert(thread);
assert(!rand_column_families.empty());
assert(!rand_keys.empty());
auto shared = thread->shared;
assert(shared);
int64_t max_key = shared->GetMaxKey();
const int64_t num_iter = static_cast<int64_t>(FLAGS_num_iterations);
int64_t lb = rand_keys[0];
if (lb > max_key - num_iter) {
lb = thread->rand.Next() % (max_key - num_iter + 1);
}
const int64_t ub = lb + num_iter;
// Lock the whole range over which we might iterate to ensure it doesn't
// change under us.
const int rand_column_family = rand_column_families[0];
// Testing parallel read and write to the same key with user timestamp
// is not currently supported
std::vector<std::unique_ptr<MutexLock>> range_locks;
if (FLAGS_user_timestamp_size > 0) {
range_locks = shared->GetLocksForKeyRange(rand_column_family, lb, ub);
}
ReadOptions ro(read_opts);
ro.total_order_seek = true;
std::string read_ts_str;
Slice read_ts;
if (FLAGS_user_timestamp_size > 0) {
read_ts_str = GetNowNanos();
read_ts = read_ts_str;
ro.timestamp = &read_ts;
}
std::string max_key_str;
Slice max_key_slice;
if (!FLAGS_destroy_db_initially) {
max_key_str = Key(max_key);
max_key_slice = max_key_str;
// to restrict iterator from reading keys written in batched_op_stress
// that do not have expected state updated and may not be parseable by
// GetIntVal().
ro.iterate_upper_bound = &max_key_slice;
}
ColumnFamilyHandle* const cfh = column_families_[rand_column_family];
assert(cfh);
const std::size_t expected_values_size = static_cast<std::size_t>(ub - lb);
std::vector<ExpectedValue> pre_read_expected_values;
std::vector<ExpectedValue> post_read_expected_values;
for (int64_t i = 0; i < static_cast<int64_t>(expected_values_size); ++i) {
pre_read_expected_values.push_back(
shared->Get(rand_column_family, i + lb));
}
std::unique_ptr<Iterator> iter(db_->NewIterator(ro, cfh));
for (int64_t i = 0; i < static_cast<int64_t>(expected_values_size); ++i) {
post_read_expected_values.push_back(
shared->Get(rand_column_family, i + lb));
}
assert(pre_read_expected_values.size() == expected_values_size &&
pre_read_expected_values.size() == post_read_expected_values.size());
std::string op_logs;
auto check_columns = [&]() {
assert(iter);
assert(iter->Valid());
if (!VerifyWideColumns(iter->value(), iter->columns())) {
shared->SetVerificationFailure();
fprintf(stderr,
"Verification failed for key %s: "
"Value and columns inconsistent: value: %s, columns: %s\n",
Slice(iter->key()).ToString(/* hex */ true).c_str(),
iter->value().ToString(/* hex */ true).c_str(),
WideColumnsToHex(iter->columns()).c_str());
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
return false;
}
return true;
};
auto check_no_key_in_range = [&](int64_t start, int64_t end) {
for (auto j = std::max(start, lb); j < std::min(end, ub); ++j) {
std::size_t index = static_cast<std::size_t>(j - lb);
assert(index < pre_read_expected_values.size() &&
index < post_read_expected_values.size());
const ExpectedValue pre_read_expected_value =
pre_read_expected_values[index];
const ExpectedValue post_read_expected_value =
post_read_expected_values[index];
if (ExpectedValueHelper::MustHaveExisted(pre_read_expected_value,
post_read_expected_value)) {
// Fail fast to preserve the DB state.
thread->shared->SetVerificationFailure();
if (iter->Valid()) {
fprintf(stderr,
"Expected state has key %s, iterator is at key %s\n",
Slice(Key(j)).ToString(true).c_str(),
iter->key().ToString(true).c_str());
} else {
fprintf(stderr, "Expected state has key %s, iterator is invalid\n",
Slice(Key(j)).ToString(true).c_str());
}
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
return false;
}
}
return true;
};
// Forward and backward scan to ensure we cover the entire range [lb, ub).
// The random sequence Next and Prev test below tends to be very short
// ranged.
int64_t last_key = lb - 1;
std::string key_str = Key(lb);
iter->Seek(key_str);
op_logs += "S " + Slice(key_str).ToString(true) + " ";
uint64_t curr = 0;
while (true) {
if (!iter->Valid()) {
if (!iter->status().ok()) {
thread->shared->SetVerificationFailure();
fprintf(stderr, "TestIterate against expected state error: %s\n",
iter->status().ToString().c_str());
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
return iter->status();
}
if (!check_no_key_in_range(last_key + 1, ub)) {
return Status::OK();
}
break;
}
if (!check_columns()) {
return Status::OK();
}
// iter is valid, the range (last_key, current key) was skipped
GetIntVal(iter->key().ToString(), &curr);
if (!check_no_key_in_range(last_key + 1, static_cast<int64_t>(curr))) {
return Status::OK();
}
last_key = static_cast<int64_t>(curr);
if (last_key >= ub - 1) {
break;
}
iter->Next();
op_logs += "N";
}
// backward scan
key_str = Key(ub - 1);
iter->SeekForPrev(key_str);
op_logs += " SFP " + Slice(key_str).ToString(true) + " ";
last_key = ub;
while (true) {
if (!iter->Valid()) {
if (!iter->status().ok()) {
thread->shared->SetVerificationFailure();
fprintf(stderr, "TestIterate against expected state error: %s\n",
iter->status().ToString().c_str());
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
return iter->status();
}
if (!check_no_key_in_range(lb, last_key)) {
return Status::OK();
}
break;
}
if (!check_columns()) {
return Status::OK();
}
// the range (current key, last key) was skipped
GetIntVal(iter->key().ToString(), &curr);
if (!check_no_key_in_range(static_cast<int64_t>(curr + 1), last_key)) {
return Status::OK();
}
last_key = static_cast<int64_t>(curr);
if (last_key <= lb) {
break;
}
iter->Prev();
op_logs += "P";
}
if (thread->rand.OneIn(2)) {
pre_read_expected_values.clear();
post_read_expected_values.clear();
// Refresh after forward/backward scan to allow higher chance of SV
// change.
for (int64_t i = 0; i < static_cast<int64_t>(expected_values_size); ++i) {
pre_read_expected_values.push_back(
shared->Get(rand_column_family, i + lb));
}
iter->Refresh();
for (int64_t i = 0; i < static_cast<int64_t>(expected_values_size); ++i) {
post_read_expected_values.push_back(
shared->Get(rand_column_family, i + lb));
}
assert(pre_read_expected_values.size() == expected_values_size &&
pre_read_expected_values.size() ==
post_read_expected_values.size());
}
// start from middle of [lb, ub) otherwise it is easy to iterate out of
// locked range
const int64_t mid = lb + num_iter / 2;
key_str = Key(mid);
const Slice key(key_str);
if (thread->rand.OneIn(2)) {
iter->Seek(key);
op_logs += " S " + key.ToString(true) + " ";
if (!iter->Valid() && iter->status().ok()) {
if (!check_no_key_in_range(mid, ub)) {
return Status::OK();
}
}
} else {
iter->SeekForPrev(key);
op_logs += " SFP " + key.ToString(true) + " ";
if (!iter->Valid() && iter->status().ok()) {
// iterator says nothing <= mid
if (!check_no_key_in_range(lb, mid + 1)) {
return Status::OK();
}
}
}
for (int64_t i = 0; i < num_iter && iter->Valid(); ++i) {
if (!check_columns()) {
return Status::OK();
}
GetIntVal(iter->key().ToString(), &curr);
if (static_cast<int64_t>(curr) < lb) {
iter->Next();
op_logs += "N";
} else if (static_cast<int64_t>(curr) >= ub) {
iter->Prev();
op_logs += "P";
} else {
const uint32_t value_base_from_db = GetValueBase(iter->value());
std::size_t index = static_cast<std::size_t>(curr - lb);
assert(index < pre_read_expected_values.size() &&
index < post_read_expected_values.size());
const ExpectedValue pre_read_expected_value =
pre_read_expected_values[index];
const ExpectedValue post_read_expected_value =
post_read_expected_values[index];
if (ExpectedValueHelper::MustHaveNotExisted(pre_read_expected_value,
post_read_expected_value) ||
!ExpectedValueHelper::InExpectedValueBaseRange(
value_base_from_db, pre_read_expected_value,
post_read_expected_value)) {
// Fail fast to preserve the DB state.
thread->shared->SetVerificationFailure();
fprintf(stderr, "Iterator has key %s, but expected state does not.\n",
iter->key().ToString(true).c_str());
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
break;
}
if (thread->rand.OneIn(2)) {
iter->Next();
op_logs += "N";
if (!iter->Valid()) {
break;
}
uint64_t next = 0;
GetIntVal(iter->key().ToString(), &next);
if (!check_no_key_in_range(static_cast<int64_t>(curr + 1),
static_cast<int64_t>(next))) {
return Status::OK();
}
} else {
iter->Prev();
op_logs += "P";
if (!iter->Valid()) {
break;
}
uint64_t prev = 0;
GetIntVal(iter->key().ToString(), &prev);
if (!check_no_key_in_range(static_cast<int64_t>(prev + 1),
static_cast<int64_t>(curr))) {
return Status::OK();
}
}
}
}
if (!iter->status().ok()) {
thread->shared->SetVerificationFailure();
fprintf(stderr, "TestIterate against expected state error: %s\n",
iter->status().ToString().c_str());
fprintf(stderr, "Column family: %s, op_logs: %s\n",
cfh->GetName().c_str(), op_logs.c_str());
thread->stats.AddErrors(1);
return iter->status();
}
thread->stats.AddIterations(1);
return Status::OK();
}
bool VerifyOrSyncValue(int cf, int64_t key, const ReadOptions& /*opts*/,
SharedState* shared, const std::string& value_from_db,
std::string msg_prefix, const Status& s) const {
if (shared->HasVerificationFailedYet()) {
return false;
}
const ExpectedValue expected_value = shared->Get(cf, key);
if (expected_value.PendingWrite() || expected_value.PendingDelete()) {
if (s.ok()) {
// Value exists in db, update state to reflect that
Slice slice(value_from_db);
uint32_t value_base = GetValueBase(slice);
shared->SyncPut(cf, key, value_base);
} else if (s.IsNotFound()) {
// Value doesn't exist in db, update state to reflect that
shared->SyncDelete(cf, key);
}
return true;
}
// compare value_from_db with the value in the shared state
if (s.ok()) {
const Slice slice(value_from_db);
const uint32_t value_base_from_db = GetValueBase(slice);
if (ExpectedValueHelper::MustHaveNotExisted(expected_value,
expected_value) ||
!ExpectedValueHelper::InExpectedValueBaseRange(
value_base_from_db, expected_value, expected_value)) {
VerificationAbort(shared, msg_prefix + ": Unexpected value found", cf,
key, value_from_db, "");
return false;
}
char expected_value_data[kValueMaxLen];
size_t expected_value_data_size =
GenerateValue(expected_value.GetValueBase(), expected_value_data,
sizeof(expected_value_data));
if (value_from_db.length() != expected_value_data_size) {
VerificationAbort(shared,
msg_prefix + ": Length of value read is not equal",
cf, key, value_from_db,
Slice(expected_value_data, expected_value_data_size));
return false;
}
if (memcmp(value_from_db.data(), expected_value_data,
expected_value_data_size) != 0) {
VerificationAbort(shared,
msg_prefix + ": Contents of value read don't match",
cf, key, value_from_db,
Slice(expected_value_data, expected_value_data_size));
return false;
}
} else if (s.IsNotFound()) {
if (ExpectedValueHelper::MustHaveExisted(expected_value,
expected_value)) {
char expected_value_data[kValueMaxLen];
size_t expected_value_data_size =
GenerateValue(expected_value.GetValueBase(), expected_value_data,
sizeof(expected_value_data));
VerificationAbort(
shared, msg_prefix + ": Value not found: " + s.ToString(), cf, key,
"", Slice(expected_value_data, expected_value_data_size));
return false;
}
} else {
assert(false);
}
return true;
}
void PrepareTxnDbOptions(SharedState* shared,
TransactionDBOptions& txn_db_opts) override {
txn_db_opts.rollback_deletion_type_callback =
[shared](TransactionDB*, ColumnFamilyHandle*, const Slice& key) {
assert(shared);
uint64_t key_num = 0;
bool ok = GetIntVal(key.ToString(), &key_num);
assert(ok);
(void)ok;
return !shared->AllowsOverwrite(key_num);
};
}
};
StressTest* CreateNonBatchedOpsStressTest() {
return new NonBatchedOpsStressTest();
}
} // namespace ROCKSDB_NAMESPACE
#endif // GFLAGS