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db_wal_test.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/db_test_util.h"
#include "db/db_with_timestamp_test_util.h"
#include "options/options_helper.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/file_system.h"
#include "test_util/sync_point.h"
#include "util/defer.h"
#include "util/udt_util.h"
#include "utilities/fault_injection_env.h"
#include "utilities/fault_injection_fs.h"
namespace ROCKSDB_NAMESPACE {
class DBWALTestBase : public DBTestBase {
protected:
explicit DBWALTestBase(const std::string& dir_name)
: DBTestBase(dir_name, /*env_do_fsync=*/true) {}
#if defined(ROCKSDB_PLATFORM_POSIX)
public:
#if defined(ROCKSDB_FALLOCATE_PRESENT)
bool IsFallocateSupported() {
// Test fallocate support of running file system.
// Skip this test if fallocate is not supported.
std::string fname_test_fallocate = dbname_ + "/preallocate_testfile";
int fd = -1;
do {
fd = open(fname_test_fallocate.c_str(), O_CREAT | O_RDWR | O_TRUNC, 0644);
} while (fd < 0 && errno == EINTR);
assert(fd > 0);
int alloc_status = fallocate(fd, 0, 0, 1);
int err_number = errno;
close(fd);
assert(env_->DeleteFile(fname_test_fallocate) == Status::OK());
if (err_number == ENOSYS || err_number == EOPNOTSUPP) {
fprintf(stderr, "Skipped preallocated space check: %s\n",
errnoStr(err_number).c_str());
return false;
}
assert(alloc_status == 0);
return true;
}
#endif // ROCKSDB_FALLOCATE_PRESENT
uint64_t GetAllocatedFileSize(std::string file_name) {
struct stat sbuf;
int err = stat(file_name.c_str(), &sbuf);
assert(err == 0);
return sbuf.st_blocks * 512;
}
#endif // ROCKSDB_PLATFORM_POSIX
};
class DBWALTest : public DBWALTestBase {
public:
DBWALTest() : DBWALTestBase("/db_wal_test") {}
};
// A SpecialEnv enriched to give more insight about deleted files
class EnrichedSpecialEnv : public SpecialEnv {
public:
explicit EnrichedSpecialEnv(Env* base) : SpecialEnv(base) {}
Status NewSequentialFile(const std::string& f,
std::unique_ptr<SequentialFile>* r,
const EnvOptions& soptions) override {
InstrumentedMutexLock l(&env_mutex_);
if (f == skipped_wal) {
deleted_wal_reopened = true;
if (IsWAL(f) && largest_deleted_wal.size() != 0 &&
f.compare(largest_deleted_wal) <= 0) {
gap_in_wals = true;
}
}
return SpecialEnv::NewSequentialFile(f, r, soptions);
}
Status DeleteFile(const std::string& fname) override {
if (IsWAL(fname)) {
deleted_wal_cnt++;
InstrumentedMutexLock l(&env_mutex_);
// If this is the first WAL, remember its name and skip deleting it. We
// remember its name partly because the application might attempt to
// delete the file again.
if (skipped_wal.size() != 0 && skipped_wal != fname) {
if (largest_deleted_wal.size() == 0 ||
largest_deleted_wal.compare(fname) < 0) {
largest_deleted_wal = fname;
}
} else {
skipped_wal = fname;
return Status::OK();
}
}
return SpecialEnv::DeleteFile(fname);
}
bool IsWAL(const std::string& fname) {
// printf("iswal %s\n", fname.c_str());
return fname.compare(fname.size() - 3, 3, "log") == 0;
}
InstrumentedMutex env_mutex_;
// the wal whose actual delete was skipped by the env
std::string skipped_wal;
// the largest WAL that was requested to be deleted
std::string largest_deleted_wal;
// number of WALs that were successfully deleted
std::atomic<size_t> deleted_wal_cnt = {0};
// the WAL whose delete from fs was skipped is reopened during recovery
std::atomic<bool> deleted_wal_reopened = {false};
// whether a gap in the WALs was detected during recovery
std::atomic<bool> gap_in_wals = {false};
};
class DBWALTestWithEnrichedEnv : public DBTestBase {
public:
DBWALTestWithEnrichedEnv()
: DBTestBase("db_wal_test", /*env_do_fsync=*/true) {
enriched_env_ = new EnrichedSpecialEnv(env_->target());
auto options = CurrentOptions();
options.env = enriched_env_;
options.allow_2pc = true;
Reopen(options);
delete env_;
// to be deleted by the parent class
env_ = enriched_env_;
}
protected:
EnrichedSpecialEnv* enriched_env_;
};
// Test that the recovery would successfully avoid the gaps between the logs.
// One known scenario that could cause this is that the application issue the
// WAL deletion out of order. For the sake of simplicity in the test, here we
// create the gap by manipulating the env to skip deletion of the first WAL but
// not the ones after it.
TEST_F(DBWALTestWithEnrichedEnv, SkipDeletedWALs) {
auto options = last_options_;
// To cause frequent WAL deletion
options.write_buffer_size = 128;
Reopen(options);
SyncPoint::GetInstance()->LoadDependency(
{{"DBImpl::PurgeObsoleteFiles:End",
"DBWALTestWithEnrichedEnv.SkipDeletedWALs:AfterFlush"}});
SyncPoint::GetInstance()->EnableProcessing();
WriteOptions writeOpt = WriteOptions();
for (int i = 0; i < 128 * 5; i++) {
ASSERT_OK(dbfull()->Put(writeOpt, "foo", "v1"));
}
FlushOptions fo;
fo.wait = true;
ASSERT_OK(db_->Flush(fo));
TEST_SYNC_POINT("DBWALTestWithEnrichedEnv.SkipDeletedWALs:AfterFlush");
// some wals are deleted
ASSERT_NE(0, enriched_env_->deleted_wal_cnt);
// but not the first one
ASSERT_NE(0, enriched_env_->skipped_wal.size());
// Test that the WAL that was not deleted will be skipped during recovery
options = last_options_;
Reopen(options);
ASSERT_FALSE(enriched_env_->deleted_wal_reopened);
ASSERT_FALSE(enriched_env_->gap_in_wals);
SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBWALTest, WAL) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v1"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v1"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "bar"));
writeOpt.disableWAL = false;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v2"));
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v2"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
// Both value's should be present.
ASSERT_EQ("v2", Get(1, "bar"));
ASSERT_EQ("v2", Get(1, "foo"));
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v3"));
writeOpt.disableWAL = false;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
// again both values should be present.
ASSERT_EQ("v3", Get(1, "foo"));
ASSERT_EQ("v3", Get(1, "bar"));
} while (ChangeWalOptions());
}
TEST_F(DBWALTest, RollLog) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "baz", "v5"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
for (int i = 0; i < 10; i++) {
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
}
ASSERT_OK(Put(1, "foo", "v4"));
for (int i = 0; i < 10; i++) {
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
}
} while (ChangeWalOptions());
}
TEST_F(DBWALTest, SyncWALNotBlockWrite) {
Options options = CurrentOptions();
options.max_write_buffer_number = 4;
DestroyAndReopen(options);
ASSERT_OK(Put("foo1", "bar1"));
ASSERT_OK(Put("foo5", "bar5"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"WritableFileWriter::SyncWithoutFlush:1",
"DBWALTest::SyncWALNotBlockWrite:1"},
{"DBWALTest::SyncWALNotBlockWrite:2",
"WritableFileWriter::SyncWithoutFlush:2"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ROCKSDB_NAMESPACE::port::Thread thread([&]() { ASSERT_OK(db_->SyncWAL()); });
TEST_SYNC_POINT("DBWALTest::SyncWALNotBlockWrite:1");
ASSERT_OK(Put("foo2", "bar2"));
ASSERT_OK(Put("foo3", "bar3"));
FlushOptions fo;
fo.wait = false;
ASSERT_OK(db_->Flush(fo));
ASSERT_OK(Put("foo4", "bar4"));
TEST_SYNC_POINT("DBWALTest::SyncWALNotBlockWrite:2");
thread.join();
ASSERT_EQ(Get("foo1"), "bar1");
ASSERT_EQ(Get("foo2"), "bar2");
ASSERT_EQ(Get("foo3"), "bar3");
ASSERT_EQ(Get("foo4"), "bar4");
ASSERT_EQ(Get("foo5"), "bar5");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBWALTest, SyncWALNotWaitWrite) {
ASSERT_OK(Put("foo1", "bar1"));
ASSERT_OK(Put("foo3", "bar3"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"SpecialEnv::SpecialWalFile::Append:1",
"DBWALTest::SyncWALNotWaitWrite:1"},
{"DBWALTest::SyncWALNotWaitWrite:2",
"SpecialEnv::SpecialWalFile::Append:2"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ROCKSDB_NAMESPACE::port::Thread thread(
[&]() { ASSERT_OK(Put("foo2", "bar2")); });
// Moving this to SyncWAL before the actual fsync
// TEST_SYNC_POINT("DBWALTest::SyncWALNotWaitWrite:1");
ASSERT_OK(db_->SyncWAL());
// Moving this to SyncWAL after actual fsync
// TEST_SYNC_POINT("DBWALTest::SyncWALNotWaitWrite:2");
thread.join();
ASSERT_EQ(Get("foo1"), "bar1");
ASSERT_EQ(Get("foo2"), "bar2");
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBWALTest, Recover) {
do {
CreateAndReopenWithCF({"pikachu"}, CurrentOptions());
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "baz", "v5"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v5", Get(1, "baz"));
ASSERT_OK(Put(1, "bar", "v2"));
ASSERT_OK(Put(1, "foo", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, CurrentOptions());
ASSERT_EQ("v3", Get(1, "foo"));
ASSERT_OK(Put(1, "foo", "v4"));
ASSERT_EQ("v4", Get(1, "foo"));
ASSERT_EQ("v2", Get(1, "bar"));
ASSERT_EQ("v5", Get(1, "baz"));
} while (ChangeWalOptions());
}
class DBWALTestWithTimestamp
: public DBBasicTestWithTimestampBase,
public testing::WithParamInterface<test::UserDefinedTimestampTestMode> {
public:
DBWALTestWithTimestamp()
: DBBasicTestWithTimestampBase("db_wal_test_with_timestamp") {}
Status CreateAndReopenWithTs(const std::vector<std::string>& cfs,
const Options& ts_options, bool persist_udt,
bool avoid_flush_during_recovery = false) {
Options default_options = CurrentOptions();
default_options.allow_concurrent_memtable_write =
persist_udt ? true : false;
DestroyAndReopen(default_options);
CreateColumnFamilies(cfs, ts_options);
return ReopenColumnFamiliesWithTs(cfs, ts_options, persist_udt,
avoid_flush_during_recovery);
}
Status ReopenColumnFamiliesWithTs(const std::vector<std::string>& cfs,
Options ts_options, bool persist_udt,
bool avoid_flush_during_recovery = false) {
Options default_options = CurrentOptions();
default_options.create_if_missing = false;
default_options.allow_concurrent_memtable_write =
persist_udt ? true : false;
default_options.avoid_flush_during_recovery = avoid_flush_during_recovery;
ts_options.create_if_missing = false;
std::vector<Options> cf_options(cfs.size(), ts_options);
std::vector<std::string> cfs_plus_default = cfs;
cfs_plus_default.insert(cfs_plus_default.begin(), kDefaultColumnFamilyName);
cf_options.insert(cf_options.begin(), default_options);
Close();
return TryReopenWithColumnFamilies(cfs_plus_default, cf_options);
}
Status Put(uint32_t cf, const Slice& key, const Slice& ts,
const Slice& value) {
WriteOptions write_opts;
return db_->Put(write_opts, handles_[cf], key, ts, value);
}
void CheckGet(const ReadOptions& read_opts, uint32_t cf, const Slice& key,
const std::string& expected_value,
const std::string& expected_ts) {
std::string actual_value;
std::string actual_ts;
ASSERT_OK(
db_->Get(read_opts, handles_[cf], key, &actual_value, &actual_ts));
ASSERT_EQ(expected_value, actual_value);
ASSERT_EQ(expected_ts, actual_ts);
}
};
TEST_P(DBWALTestWithTimestamp, RecoverAndNoFlush) {
// Set up the option that enables user defined timestmp size.
std::string ts1;
PutFixed64(&ts1, 1);
Options ts_options;
ts_options.create_if_missing = true;
ts_options.comparator = test::BytewiseComparatorWithU64TsWrapper();
// Test that user-defined timestamps are recovered from WAL regardless of
// the value of this flag because UDTs are saved in WAL nonetheless.
// We however need to explicitly disable flush during recovery by setting
// `avoid_flush_during_recovery=true` so that we can avoid timestamps getting
// stripped when the `persist_user_defined_timestamps` flag is false, so that
// all written timestamps are available for testing user-defined time travel
// read.
bool persist_udt = test::ShouldPersistUDT(GetParam());
ts_options.persist_user_defined_timestamps = persist_udt;
bool avoid_flush_during_recovery = true;
std::string full_history_ts_low;
ReadOptions read_opts;
do {
Slice ts_slice = ts1;
read_opts.timestamp = &ts_slice;
ASSERT_OK(CreateAndReopenWithTs({"pikachu"}, ts_options, persist_udt,
avoid_flush_during_recovery));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"), 0U);
ASSERT_OK(Put(1, "foo", ts1, "v1"));
ASSERT_OK(Put(1, "baz", ts1, "v5"));
ASSERT_OK(ReopenColumnFamiliesWithTs({"pikachu"}, ts_options, persist_udt,
avoid_flush_during_recovery));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"), 0U);
// Do a timestamped read with ts1 after second reopen.
CheckGet(read_opts, 1, "foo", "v1", ts1);
CheckGet(read_opts, 1, "baz", "v5", ts1);
// Write more value versions for key "foo" and "bar" before and after second
// reopen.
std::string ts2;
PutFixed64(&ts2, 2);
ASSERT_OK(Put(1, "bar", ts2, "v2"));
ASSERT_OK(Put(1, "foo", ts2, "v3"));
ASSERT_OK(ReopenColumnFamiliesWithTs({"pikachu"}, ts_options, persist_udt,
avoid_flush_during_recovery));
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"), 0U);
std::string ts3;
PutFixed64(&ts3, 3);
ASSERT_OK(Put(1, "foo", ts3, "v4"));
// All the key value pairs available for read:
// "foo" -> [(ts1, "v1"), (ts2, "v3"), (ts3, "v4")]
// "bar" -> [(ts2, "v2")]
// "baz" -> [(ts1, "v5")]
// Do a timestamped read with ts1 after third reopen.
// read_opts.timestamp is set to ts1 for below reads
CheckGet(read_opts, 1, "foo", "v1", ts1);
std::string value;
ASSERT_TRUE(db_->Get(read_opts, handles_[1], "bar", &value).IsNotFound());
CheckGet(read_opts, 1, "baz", "v5", ts1);
// Do a timestamped read with ts2 after third reopen.
ts_slice = ts2;
// read_opts.timestamp is set to ts2 for below reads.
CheckGet(read_opts, 1, "foo", "v3", ts2);
CheckGet(read_opts, 1, "bar", "v2", ts2);
CheckGet(read_opts, 1, "baz", "v5", ts1);
// Do a timestamped read with ts3 after third reopen.
ts_slice = ts3;
// read_opts.timestamp is set to ts3 for below reads.
CheckGet(read_opts, 1, "foo", "v4", ts3);
CheckGet(read_opts, 1, "bar", "v2", ts2);
CheckGet(read_opts, 1, "baz", "v5", ts1);
ASSERT_OK(db_->GetFullHistoryTsLow(handles_[1], &full_history_ts_low));
ASSERT_TRUE(full_history_ts_low.empty());
} while (ChangeWalOptions());
}
TEST_P(DBWALTestWithTimestamp, RecoverAndFlush) {
// Set up the option that enables user defined timestamp size.
std::string min_ts;
std::string write_ts;
PutFixed64(&min_ts, 0);
PutFixed64(&write_ts, 1);
Options ts_options;
ts_options.create_if_missing = true;
ts_options.comparator = test::BytewiseComparatorWithU64TsWrapper();
bool persist_udt = test::ShouldPersistUDT(GetParam());
ts_options.persist_user_defined_timestamps = persist_udt;
std::string smallest_ukey_without_ts = "baz";
std::string largest_ukey_without_ts = "foo";
ASSERT_OK(CreateAndReopenWithTs({"pikachu"}, ts_options, persist_udt));
// No flush, no sst files, because of no data.
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"), 0U);
ASSERT_OK(Put(1, largest_ukey_without_ts, write_ts, "v1"));
ASSERT_OK(Put(1, smallest_ukey_without_ts, write_ts, "v5"));
ASSERT_OK(ReopenColumnFamiliesWithTs({"pikachu"}, ts_options, persist_udt));
// Memtable recovered from WAL flushed because `avoid_flush_during_recovery`
// defaults to false, created one L0 file.
ASSERT_EQ(GetNumberOfSstFilesForColumnFamily(db_, "pikachu"), 1U);
std::vector<std::vector<FileMetaData>> level_to_files;
dbfull()->TEST_GetFilesMetaData(handles_[1], &level_to_files);
std::string full_history_ts_low;
ASSERT_OK(db_->GetFullHistoryTsLow(handles_[1], &full_history_ts_low));
ASSERT_GT(level_to_files.size(), 1);
// L0 only has one SST file.
ASSERT_EQ(level_to_files[0].size(), 1);
auto meta = level_to_files[0][0];
if (persist_udt) {
ASSERT_EQ(smallest_ukey_without_ts + write_ts, meta.smallest.user_key());
ASSERT_EQ(largest_ukey_without_ts + write_ts, meta.largest.user_key());
ASSERT_TRUE(full_history_ts_low.empty());
} else {
ASSERT_EQ(smallest_ukey_without_ts + min_ts, meta.smallest.user_key());
ASSERT_EQ(largest_ukey_without_ts + min_ts, meta.largest.user_key());
std::string effective_cutoff;
Slice write_ts_slice = write_ts;
GetFullHistoryTsLowFromU64CutoffTs(&write_ts_slice, &effective_cutoff);
ASSERT_EQ(effective_cutoff, full_history_ts_low);
}
}
// Param 0: test mode for the user-defined timestamp feature
INSTANTIATE_TEST_CASE_P(
P, DBWALTestWithTimestamp,
::testing::Values(
test::UserDefinedTimestampTestMode::kStripUserDefinedTimestamp,
test::UserDefinedTimestampTestMode::kNormal));
TEST_F(DBWALTestWithTimestamp, EnableDisableUDT) {
Options options;
options.create_if_missing = true;
options.comparator = BytewiseComparator();
bool avoid_flush_during_recovery = true;
ASSERT_OK(CreateAndReopenWithTs({"pikachu"}, options, true /* persist_udt */,
avoid_flush_during_recovery));
ASSERT_OK(db_->Put(WriteOptions(), handles_[1], "foo", "v1"));
ASSERT_OK(db_->Put(WriteOptions(), handles_[1], "baz", "v5"));
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
options.persist_user_defined_timestamps = false;
// Test handle timestamp size inconsistency in WAL when enabling user-defined
// timestamps.
ASSERT_OK(ReopenColumnFamiliesWithTs({"pikachu"}, options,
false /* persist_udt */,
avoid_flush_during_recovery));
std::string ts;
PutFixed64(&ts, 0);
Slice ts_slice = ts;
ReadOptions read_opts;
read_opts.timestamp = &ts_slice;
// Pre-existing entries are treated as if they have the min timestamp.
CheckGet(read_opts, 1, "foo", "v1", ts);
CheckGet(read_opts, 1, "baz", "v5", ts);
ts.clear();
PutFixed64(&ts, 1);
ASSERT_OK(db_->Put(WriteOptions(), handles_[1], "foo", ts, "v2"));
ASSERT_OK(db_->Put(WriteOptions(), handles_[1], "baz", ts, "v6"));
CheckGet(read_opts, 1, "foo", "v2", ts);
CheckGet(read_opts, 1, "baz", "v6", ts);
options.comparator = BytewiseComparator();
// Open the column family again with the UDT feature disabled. Test handle
// timestamp size inconsistency in WAL when disabling user-defined timestamps
ASSERT_OK(ReopenColumnFamiliesWithTs({"pikachu"}, options,
true /* persist_udt */,
avoid_flush_during_recovery));
ASSERT_EQ("v2", Get(1, "foo"));
ASSERT_EQ("v6", Get(1, "baz"));
}
TEST_F(DBWALTest, RecoverWithTableHandle) {
do {
Options options = CurrentOptions();
options.create_if_missing = true;
options.disable_auto_compactions = true;
options.avoid_flush_during_recovery = false;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "v1"));
ASSERT_OK(Put(1, "bar", "v2"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "v3"));
ASSERT_OK(Put(1, "bar", "v4"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "big", std::string(100, 'a')));
options = CurrentOptions();
const int kSmallMaxOpenFiles = 13;
if (option_config_ == kDBLogDir) {
// Use this option to check not preloading files
// Set the max open files to be small enough so no preload will
// happen.
options.max_open_files = kSmallMaxOpenFiles;
// RocksDB sanitize max open files to at least 20. Modify it back.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SanitizeOptions::AfterChangeMaxOpenFiles", [&](void* arg) {
int* max_open_files = static_cast<int*>(arg);
*max_open_files = kSmallMaxOpenFiles;
});
} else if (option_config_ == kWalDirAndMmapReads) {
// Use this option to check always loading all files.
options.max_open_files = 100;
} else {
options.max_open_files = -1;
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
std::vector<std::vector<FileMetaData>> files;
dbfull()->TEST_GetFilesMetaData(handles_[1], &files);
size_t total_files = 0;
for (const auto& level : files) {
total_files += level.size();
}
ASSERT_EQ(total_files, 3);
for (const auto& level : files) {
for (const auto& file : level) {
if (options.max_open_files == kSmallMaxOpenFiles) {
ASSERT_TRUE(file.table_reader_handle == nullptr);
} else {
ASSERT_TRUE(file.table_reader_handle != nullptr);
}
}
}
} while (ChangeWalOptions());
}
TEST_F(DBWALTest, RecoverWithBlob) {
// Write a value that's below the prospective size limit for blobs and another
// one that's above. Note that blob files are not actually enabled at this
// point.
constexpr uint64_t min_blob_size = 10;
constexpr char short_value[] = "short";
static_assert(sizeof(short_value) - 1 < min_blob_size,
"short_value too long");
constexpr char long_value[] = "long_value";
static_assert(sizeof(long_value) - 1 >= min_blob_size,
"long_value too short");
ASSERT_OK(Put("key1", short_value));
ASSERT_OK(Put("key2", long_value));
// There should be no files just yet since we haven't flushed.
{
VersionSet* const versions = dbfull()->GetVersionSet();
ASSERT_NE(versions, nullptr);
ColumnFamilyData* const cfd = versions->GetColumnFamilySet()->GetDefault();
ASSERT_NE(cfd, nullptr);
Version* const current = cfd->current();
ASSERT_NE(current, nullptr);
const VersionStorageInfo* const storage_info = current->storage_info();
ASSERT_NE(storage_info, nullptr);
ASSERT_EQ(storage_info->num_non_empty_levels(), 0);
ASSERT_TRUE(storage_info->GetBlobFiles().empty());
}
// Reopen the database with blob files enabled. A new table file/blob file
// pair should be written during recovery.
Options options;
options.enable_blob_files = true;
options.min_blob_size = min_blob_size;
options.avoid_flush_during_recovery = false;
options.disable_auto_compactions = true;
options.env = env_;
Reopen(options);
ASSERT_EQ(Get("key1"), short_value);
ASSERT_EQ(Get("key2"), long_value);
VersionSet* const versions = dbfull()->GetVersionSet();
ASSERT_NE(versions, nullptr);
ColumnFamilyData* const cfd = versions->GetColumnFamilySet()->GetDefault();
ASSERT_NE(cfd, nullptr);
Version* const current = cfd->current();
ASSERT_NE(current, nullptr);
const VersionStorageInfo* const storage_info = current->storage_info();
ASSERT_NE(storage_info, nullptr);
const auto& l0_files = storage_info->LevelFiles(0);
ASSERT_EQ(l0_files.size(), 1);
const FileMetaData* const table_file = l0_files[0];
ASSERT_NE(table_file, nullptr);
const auto& blob_files = storage_info->GetBlobFiles();
ASSERT_EQ(blob_files.size(), 1);
const auto& blob_file = blob_files.front();
ASSERT_NE(blob_file, nullptr);
ASSERT_EQ(table_file->smallest.user_key(), "key1");
ASSERT_EQ(table_file->largest.user_key(), "key2");
ASSERT_EQ(table_file->fd.smallest_seqno, 1);
ASSERT_EQ(table_file->fd.largest_seqno, 2);
ASSERT_EQ(table_file->oldest_blob_file_number,
blob_file->GetBlobFileNumber());
ASSERT_EQ(blob_file->GetTotalBlobCount(), 1);
const InternalStats* const internal_stats = cfd->internal_stats();
ASSERT_NE(internal_stats, nullptr);
const auto& compaction_stats = internal_stats->TEST_GetCompactionStats();
ASSERT_FALSE(compaction_stats.empty());
ASSERT_EQ(compaction_stats[0].bytes_written, table_file->fd.GetFileSize());
ASSERT_EQ(compaction_stats[0].bytes_written_blob,
blob_file->GetTotalBlobBytes());
ASSERT_EQ(compaction_stats[0].num_output_files, 1);
ASSERT_EQ(compaction_stats[0].num_output_files_blob, 1);
const uint64_t* const cf_stats_value = internal_stats->TEST_GetCFStatsValue();
ASSERT_EQ(cf_stats_value[InternalStats::BYTES_FLUSHED],
compaction_stats[0].bytes_written +
compaction_stats[0].bytes_written_blob);
}
TEST_F(DBWALTest, RecoverWithBlobMultiSST) {
// Write several large (4 KB) values without flushing. Note that blob files
// are not actually enabled at this point.
std::string large_value(1 << 12, 'a');
constexpr int num_keys = 64;
for (int i = 0; i < num_keys; ++i) {
ASSERT_OK(Put(Key(i), large_value));
}
// There should be no files just yet since we haven't flushed.
{
VersionSet* const versions = dbfull()->GetVersionSet();
ASSERT_NE(versions, nullptr);
ColumnFamilyData* const cfd = versions->GetColumnFamilySet()->GetDefault();
ASSERT_NE(cfd, nullptr);
Version* const current = cfd->current();
ASSERT_NE(current, nullptr);
const VersionStorageInfo* const storage_info = current->storage_info();
ASSERT_NE(storage_info, nullptr);
ASSERT_EQ(storage_info->num_non_empty_levels(), 0);
ASSERT_TRUE(storage_info->GetBlobFiles().empty());
}
// Reopen the database with blob files enabled and write buffer size set to a
// smaller value. Multiple table files+blob files should be written and added
// to the Version during recovery.
Options options;
options.write_buffer_size = 1 << 16; // 64 KB
options.enable_blob_files = true;
options.avoid_flush_during_recovery = false;
options.disable_auto_compactions = true;
options.env = env_;
Reopen(options);
for (int i = 0; i < num_keys; ++i) {
ASSERT_EQ(Get(Key(i)), large_value);
}
VersionSet* const versions = dbfull()->GetVersionSet();
ASSERT_NE(versions, nullptr);
ColumnFamilyData* const cfd = versions->GetColumnFamilySet()->GetDefault();
ASSERT_NE(cfd, nullptr);
Version* const current = cfd->current();
ASSERT_NE(current, nullptr);
const VersionStorageInfo* const storage_info = current->storage_info();
ASSERT_NE(storage_info, nullptr);
const auto& l0_files = storage_info->LevelFiles(0);
ASSERT_GT(l0_files.size(), 1);
const auto& blob_files = storage_info->GetBlobFiles();
ASSERT_GT(blob_files.size(), 1);
ASSERT_EQ(l0_files.size(), blob_files.size());
}
TEST_F(DBWALTest, WALWithChecksumHandoff) {
#ifndef ROCKSDB_ASSERT_STATUS_CHECKED
if (mem_env_ || encrypted_env_) {
ROCKSDB_GTEST_SKIP("Test requires non-mem or non-encrypted environment");
return;
}
std::shared_ptr<FaultInjectionTestFS> fault_fs(
new FaultInjectionTestFS(FileSystem::Default()));
std::unique_ptr<Env> fault_fs_env(NewCompositeEnv(fault_fs));
do {
Options options = CurrentOptions();
options.checksum_handoff_file_types.Add(FileType::kWalFile);
options.env = fault_fs_env.get();
fault_fs->SetChecksumHandoffFuncType(ChecksumType::kCRC32c);
CreateAndReopenWithCF({"pikachu"}, options);
WriteOptions writeOpt = WriteOptions();
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v1"));
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v1"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("v1", Get(1, "foo"));
ASSERT_EQ("v1", Get(1, "bar"));
writeOpt.disableWAL = false;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v2"));
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v2"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// Both value's should be present.
ASSERT_EQ("v2", Get(1, "bar"));
ASSERT_EQ("v2", Get(1, "foo"));
writeOpt.disableWAL = true;
// This put, data is persisted by Flush
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
writeOpt.disableWAL = false;
// Data is persisted in the WAL
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "zoo", "v3"));
ASSERT_OK(dbfull()->SyncWAL());
// The hash does not match, write fails
fault_fs->SetChecksumHandoffFuncType(ChecksumType::kxxHash);
writeOpt.disableWAL = false;
ASSERT_NOK(dbfull()->Put(writeOpt, handles_[1], "foo", "v3"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// Due to the write failure, Get should not find
ASSERT_NE("v3", Get(1, "foo"));
ASSERT_EQ("v3", Get(1, "zoo"));
ASSERT_EQ("v3", Get(1, "bar"));
fault_fs->SetChecksumHandoffFuncType(ChecksumType::kCRC32c);
// Each write will be similated as corrupted.
fault_fs->IngestDataCorruptionBeforeWrite();
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v4"));
writeOpt.disableWAL = false;
ASSERT_NOK(dbfull()->Put(writeOpt, handles_[1], "foo", "v4"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_NE("v4", Get(1, "foo"));
ASSERT_NE("v4", Get(1, "bar"));
fault_fs->NoDataCorruptionBeforeWrite();
fault_fs->SetChecksumHandoffFuncType(ChecksumType::kNoChecksum);
// The file system does not provide checksum method and verification.
writeOpt.disableWAL = true;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "bar", "v5"));
writeOpt.disableWAL = false;
ASSERT_OK(dbfull()->Put(writeOpt, handles_[1], "foo", "v5"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("v5", Get(1, "foo"));
ASSERT_EQ("v5", Get(1, "bar"));
Destroy(options);
} while (ChangeWalOptions());
#endif // ROCKSDB_ASSERT_STATUS_CHECKED
}
TEST_F(DBWALTest, LockWal) {
do {
Options options = CurrentOptions();
options.create_if_missing = true;
DestroyAndReopen(options);
ASSERT_OK(Put("foo", "v"));
ASSERT_OK(Put("bar", "v"));
ASSERT_OK(db_->LockWAL());
// Verify writes are stopped
WriteOptions wopts;
wopts.no_slowdown = true;
Status s = db_->Put(wopts, "foo", "dontcare");
ASSERT_TRUE(s.IsIncomplete());
{
VectorLogPtr wals;
ASSERT_OK(db_->GetSortedWalFiles(wals));
ASSERT_FALSE(wals.empty());
}
port::Thread worker([&]() {
Status tmp_s = db_->Flush(FlushOptions());
ASSERT_OK(tmp_s);
});
FlushOptions flush_opts;
flush_opts.wait = false;
s = db_->Flush(flush_opts);
ASSERT_TRUE(s.IsTryAgain());
ASSERT_OK(db_->UnlockWAL());
ASSERT_OK(db_->Put(WriteOptions(), "foo", "dontcare"));
worker.join();
} while (ChangeWalOptions());
}
class DBRecoveryTestBlobError
: public DBWALTest,
public testing::WithParamInterface<std::string> {
public:
DBRecoveryTestBlobError() : sync_point_(GetParam()) {}
std::string sync_point_;
};
INSTANTIATE_TEST_CASE_P(DBRecoveryTestBlobError, DBRecoveryTestBlobError,
::testing::ValuesIn(std::vector<std::string>{
"BlobFileBuilder::WriteBlobToFile:AddRecord",
"BlobFileBuilder::WriteBlobToFile:AppendFooter"}));
TEST_P(DBRecoveryTestBlobError, RecoverWithBlobError) {
// Write a value. Note that blob files are not actually enabled at this point.
ASSERT_OK(Put("key", "blob"));
// Reopen with blob files enabled but make blob file writing fail during
// recovery.
SyncPoint::GetInstance()->SetCallBack(sync_point_, [this](void* arg) {
Status* const s = static_cast<Status*>(arg);
assert(s);
(*s) = Status::IOError(sync_point_);
});
SyncPoint::GetInstance()->EnableProcessing();
Options options;
options.enable_blob_files = true;
options.avoid_flush_during_recovery = false;
options.disable_auto_compactions = true;
options.env = env_;
ASSERT_NOK(TryReopen(options));
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
// Make sure the files generated by the failed recovery have been deleted.
std::vector<std::string> files;
ASSERT_OK(env_->GetChildren(dbname_, &files));
for (const auto& file : files) {
uint64_t number = 0;
FileType type = kTableFile;
if (!ParseFileName(file, &number, &type)) {
continue;
}
ASSERT_NE(type, kTableFile);
ASSERT_NE(type, kBlobFile);
}
}
TEST_F(DBWALTest, IgnoreRecoveredLog) {
std::string backup_logs = dbname_ + "/backup_logs";
do {
// delete old files in backup_logs directory
ASSERT_OK(env_->CreateDirIfMissing(backup_logs));
std::vector<std::string> old_files;
ASSERT_OK(env_->GetChildren(backup_logs, &old_files));
for (auto& file : old_files) {
ASSERT_OK(env_->DeleteFile(backup_logs + "/" + file));
}
Options options = CurrentOptions();
options.create_if_missing = true;
options.merge_operator = MergeOperators::CreateUInt64AddOperator();
options.wal_dir = dbname_ + "/logs";
DestroyAndReopen(options);
// fill up the DB
std::string one, two;
PutFixed64(&one, 1);
PutFixed64(&two, 2);
ASSERT_OK(db_->Merge(WriteOptions(), Slice("foo"), Slice(one)));
ASSERT_OK(db_->Merge(WriteOptions(), Slice("foo"), Slice(one)));
ASSERT_OK(db_->Merge(WriteOptions(), Slice("bar"), Slice(one)));
// copy the logs to backup
std::vector<std::string> logs;
ASSERT_OK(env_->GetChildren(options.wal_dir, &logs));
for (auto& log : logs) {
CopyFile(options.wal_dir + "/" + log, backup_logs + "/" + log);
}
// recover the DB
Reopen(options);
ASSERT_EQ(two, Get("foo"));
ASSERT_EQ(one, Get("bar"));
Close();
// copy the logs from backup back to wal dir
for (auto& log : logs) {
CopyFile(backup_logs + "/" + log, options.wal_dir + "/" + log);
}
// this should ignore the log files, recovery should not happen again
// if the recovery happens, the same merge operator would be called twice,
// leading to incorrect results
Reopen(options);
ASSERT_EQ(two, Get("foo"));
ASSERT_EQ(one, Get("bar"));
Close();
Destroy(options);
Reopen(options);
Close();