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rocksdb/utilities/backupable/backupable_db_test.cc
Peter Dillinger 7d0ecab570 Fix some flaky tests in BackupableDBTest with intentional flushing (#7273) 
Summary:
Some tests like BackupableDBTest.FileCollision and
ShareTableFilesWithChecksumsNewNaming are intermittently failing,
probably due to unpredictable flushing with FillDB. This change
should fix the failures seen and help to prevent similar flakiness in
future tests in the file.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7273

Test Plan: make check, and with valgrind

Reviewed By: siying

Differential Revision: D23176947

Pulled By: pdillinger

fbshipit-source-id: 654b73a64db475f2b9b065ed53a889a8b9083c59
2020-08-17 22:07:17 -07:00

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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.
#if !defined(ROCKSDB_LITE) && !defined(OS_WIN)
#include "rocksdb/utilities/backupable_db.h"
#include <algorithm>
#include <limits>
#include <string>
#include <utility>
#include "db/db_impl/db_impl.h"
#include "env/env_chroot.h"
#include "file/filename.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/rate_limiter.h"
#include "rocksdb/transaction_log.h"
#include "rocksdb/types.h"
#include "rocksdb/utilities/options_util.h"
#include "test_util/sync_point.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/cast_util.h"
#include "util/mutexlock.h"
#include "util/random.h"
#include "util/stderr_logger.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
namespace {
class DummyFileChecksumGen : public FileChecksumGenerator {
public:
explicit DummyFileChecksumGen(const FileChecksumGenContext& /* context */,
bool state) {
if (state) {
checksum_ = 0;
} else {
checksum_ = 1;
}
}
void Update(const char* /* data */, size_t /* n */) override {}
void Finalize() override {
assert(checksum_str_.empty());
// Store as big endian raw bytes
PutFixed32(&checksum_str_, EndianSwapValue(checksum_));
}
std::string GetChecksum() const override {
assert(!checksum_str_.empty());
return checksum_str_;
}
const char* Name() const override { return "DummyFileChecksum"; }
private:
uint32_t checksum_;
std::string checksum_str_;
};
class DummyFileChecksumGenFactory : public FileChecksumGenFactory {
public:
explicit DummyFileChecksumGenFactory(bool state = false) : state_(state) {}
std::unique_ptr<FileChecksumGenerator> CreateFileChecksumGenerator(
const FileChecksumGenContext& context) override {
if (context.requested_checksum_func_name.empty() ||
context.requested_checksum_func_name == "DummyFileChecksum") {
return std::unique_ptr<FileChecksumGenerator>(
new DummyFileChecksumGen(context, state_));
} else {
return nullptr;
}
}
const char* Name() const override { return "DummyFileChecksumGenFactory"; }
private:
bool state_;
};
class FileHash32Gen : public FileChecksumGenerator {
public:
explicit FileHash32Gen(const FileChecksumGenContext& /*context*/) {
checksum_ = 0;
}
void Update(const char* data, size_t n) override { content_.append(data, n); }
void Finalize() override {
assert(checksum_str_.empty());
const char* str = content_.c_str();
checksum_ = Hash(str, strlen(str), 1);
// Store as big endian raw bytes
PutFixed32(&checksum_str_, EndianSwapValue(checksum_));
}
std::string GetChecksum() const override {
assert(!checksum_str_.empty());
return checksum_str_;
}
const char* Name() const override { return "FileHash32"; }
private:
std::string content_;
uint32_t checksum_;
std::string checksum_str_;
};
class FileHash64Gen : public FileChecksumGenerator {
public:
explicit FileHash64Gen(const FileChecksumGenContext& /*context*/) {
checksum_ = 0;
}
void Update(const char* data, size_t n) override { content_.append(data, n); }
void Finalize() override {
assert(checksum_str_.empty());
const char* str = content_.c_str();
checksum_ = Hash64(str, strlen(str), 1);
// Store as big endian raw bytes
PutFixed64(&checksum_str_, EndianSwapValue(checksum_));
}
std::string GetChecksum() const override {
assert(!checksum_str_.empty());
return checksum_str_;
}
const char* Name() const override { return "FileHash64"; }
private:
std::string content_;
uint64_t checksum_;
std::string checksum_str_;
};
class FileHash32GenFactory : public FileChecksumGenFactory {
public:
std::unique_ptr<FileChecksumGenerator> CreateFileChecksumGenerator(
const FileChecksumGenContext& context) override {
if (context.requested_checksum_func_name.empty() ||
context.requested_checksum_func_name == "FileHash32") {
return std::unique_ptr<FileChecksumGenerator>(new FileHash32Gen(context));
} else {
return nullptr;
}
}
const char* Name() const override { return "FileHash32GenFactory"; }
};
class FileHashGenFactory : public FileChecksumGenFactory {
public:
std::unique_ptr<FileChecksumGenerator> CreateFileChecksumGenerator(
const FileChecksumGenContext& context) override {
if (context.requested_checksum_func_name.empty() ||
context.requested_checksum_func_name == "FileHash64") {
return std::unique_ptr<FileChecksumGenerator>(new FileHash64Gen(context));
} else if (context.requested_checksum_func_name == "FileHash32") {
return std::unique_ptr<FileChecksumGenerator>(new FileHash32Gen(context));
} else {
return nullptr;
}
}
const char* Name() const override { return "FileHashGenFactory"; }
};
class DummyDB : public StackableDB {
public:
/* implicit */
DummyDB(const Options& options, const std::string& dbname)
: StackableDB(nullptr), options_(options), dbname_(dbname),
deletions_enabled_(true), sequence_number_(0) {}
SequenceNumber GetLatestSequenceNumber() const override {
return ++sequence_number_;
}
const std::string& GetName() const override { return dbname_; }
Env* GetEnv() const override { return options_.env; }
using DB::GetOptions;
Options GetOptions(ColumnFamilyHandle* /*column_family*/) const override {
return options_;
}
DBOptions GetDBOptions() const override { return DBOptions(options_); }
Status EnableFileDeletions(bool /*force*/) override {
EXPECT_TRUE(!deletions_enabled_);
deletions_enabled_ = true;
return Status::OK();
}
Status DisableFileDeletions() override {
EXPECT_TRUE(deletions_enabled_);
deletions_enabled_ = false;
return Status::OK();
}
Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool /*flush_memtable*/ = true) override {
EXPECT_TRUE(!deletions_enabled_);
vec = live_files_;
*mfs = 100;
return Status::OK();
}
ColumnFamilyHandle* DefaultColumnFamily() const override { return nullptr; }
class DummyLogFile : public LogFile {
public:
/* implicit */
DummyLogFile(const std::string& path, bool alive = true)
: path_(path), alive_(alive) {}
std::string PathName() const override { return path_; }
uint64_t LogNumber() const override {
// what business do you have calling this method?
ADD_FAILURE();
return 0;
}
WalFileType Type() const override {
return alive_ ? kAliveLogFile : kArchivedLogFile;
}
SequenceNumber StartSequence() const override {
// this seqnum guarantees the dummy file will be included in the backup
// as long as it is alive.
return kMaxSequenceNumber;
}
uint64_t SizeFileBytes() const override { return 0; }
private:
std::string path_;
bool alive_;
}; // DummyLogFile
Status GetSortedWalFiles(VectorLogPtr& files) override {
EXPECT_TRUE(!deletions_enabled_);
files.resize(wal_files_.size());
for (size_t i = 0; i < files.size(); ++i) {
files[i].reset(
new DummyLogFile(wal_files_[i].first, wal_files_[i].second));
}
return Status::OK();
}
// To avoid FlushWAL called on stacked db which is nullptr
Status FlushWAL(bool /*sync*/) override { return Status::OK(); }
std::vector<std::string> live_files_;
// pair<filename, alive?>
std::vector<std::pair<std::string, bool>> wal_files_;
private:
Options options_;
std::string dbname_;
bool deletions_enabled_;
mutable SequenceNumber sequence_number_;
}; // DummyDB
class TestEnv : public EnvWrapper {
public:
explicit TestEnv(Env* t) : EnvWrapper(t) {}
class DummySequentialFile : public SequentialFile {
public:
explicit DummySequentialFile(bool fail_reads)
: SequentialFile(), rnd_(5), fail_reads_(fail_reads) {}
Status Read(size_t n, Slice* result, char* scratch) override {
if (fail_reads_) {
return Status::IOError();
}
size_t read_size = (n > size_left) ? size_left : n;
for (size_t i = 0; i < read_size; ++i) {
scratch[i] = rnd_.Next() & 255;
}
*result = Slice(scratch, read_size);
size_left -= read_size;
return Status::OK();
}
Status Skip(uint64_t n) override {
size_left = (n > size_left) ? size_left - n : 0;
return Status::OK();
}
private:
size_t size_left = 200;
Random rnd_;
bool fail_reads_;
};
Status NewSequentialFile(const std::string& f,
std::unique_ptr<SequentialFile>* r,
const EnvOptions& options) override {
MutexLock l(&mutex_);
if (dummy_sequential_file_) {
r->reset(
new TestEnv::DummySequentialFile(dummy_sequential_file_fail_reads_));
return Status::OK();
} else {
Status s = EnvWrapper::NewSequentialFile(f, r, options);
if (s.ok()) {
if ((*r)->use_direct_io()) {
++num_direct_seq_readers_;
}
++num_seq_readers_;
}
return s;
}
}
Status NewWritableFile(const std::string& f, std::unique_ptr<WritableFile>* r,
const EnvOptions& options) override {
MutexLock l(&mutex_);
written_files_.push_back(f);
if (limit_written_files_ <= 0) {
return Status::NotSupported("Sorry, can't do this");
}
limit_written_files_--;
Status s = EnvWrapper::NewWritableFile(f, r, options);
if (s.ok()) {
if ((*r)->use_direct_io()) {
++num_direct_writers_;
}
++num_writers_;
}
return s;
}
Status NewRandomAccessFile(const std::string& fname,
std::unique_ptr<RandomAccessFile>* result,
const EnvOptions& options) override {
MutexLock l(&mutex_);
Status s = EnvWrapper::NewRandomAccessFile(fname, result, options);
if (s.ok()) {
if ((*result)->use_direct_io()) {
++num_direct_rand_readers_;
}
++num_rand_readers_;
}
return s;
}
Status DeleteFile(const std::string& fname) override {
MutexLock l(&mutex_);
if (fail_delete_files_) {
return Status::IOError();
}
EXPECT_GT(limit_delete_files_, 0U);
limit_delete_files_--;
return EnvWrapper::DeleteFile(fname);
}
Status DeleteDir(const std::string& dirname) override {
MutexLock l(&mutex_);
if (fail_delete_files_) {
return Status::IOError();
}
return EnvWrapper::DeleteDir(dirname);
}
void AssertWrittenFiles(std::vector<std::string>& should_have_written) {
MutexLock l(&mutex_);
std::sort(should_have_written.begin(), should_have_written.end());
std::sort(written_files_.begin(), written_files_.end());
ASSERT_EQ(should_have_written, written_files_);
}
void ClearWrittenFiles() {
MutexLock l(&mutex_);
written_files_.clear();
}
void SetLimitWrittenFiles(uint64_t limit) {
MutexLock l(&mutex_);
limit_written_files_ = limit;
}
void SetLimitDeleteFiles(uint64_t limit) {
MutexLock l(&mutex_);
limit_delete_files_ = limit;
}
void SetDeleteFileFailure(bool fail) {
MutexLock l(&mutex_);
fail_delete_files_ = fail;
}
void SetDummySequentialFile(bool dummy_sequential_file) {
MutexLock l(&mutex_);
dummy_sequential_file_ = dummy_sequential_file;
}
void SetDummySequentialFileFailReads(bool dummy_sequential_file_fail_reads) {
MutexLock l(&mutex_);
dummy_sequential_file_fail_reads_ = dummy_sequential_file_fail_reads;
}
void SetGetChildrenFailure(bool fail) { get_children_failure_ = fail; }
Status GetChildren(const std::string& dir,
std::vector<std::string>* r) override {
if (get_children_failure_) {
return Status::IOError("SimulatedFailure");
}
return EnvWrapper::GetChildren(dir, r);
}
// Some test cases do not actually create the test files (e.g., see
// DummyDB::live_files_) - for those cases, we mock those files' attributes
// so CreateNewBackup() can get their attributes.
void SetFilenamesForMockedAttrs(const std::vector<std::string>& filenames) {
filenames_for_mocked_attrs_ = filenames;
}
Status GetChildrenFileAttributes(
const std::string& dir, std::vector<Env::FileAttributes>* r) override {
if (filenames_for_mocked_attrs_.size() > 0) {
for (const auto& filename : filenames_for_mocked_attrs_) {
r->push_back({dir + filename, 10 /* size_bytes */});
}
return Status::OK();
}
return EnvWrapper::GetChildrenFileAttributes(dir, r);
}
Status GetFileSize(const std::string& path, uint64_t* size_bytes) override {
if (filenames_for_mocked_attrs_.size() > 0) {
auto fname = path.substr(path.find_last_of('/'));
auto filename_iter = std::find(filenames_for_mocked_attrs_.begin(),
filenames_for_mocked_attrs_.end(), fname);
if (filename_iter != filenames_for_mocked_attrs_.end()) {
*size_bytes = 10;
return Status::OK();
}
return Status::NotFound(fname);
}
return EnvWrapper::GetFileSize(path, size_bytes);
}
void SetCreateDirIfMissingFailure(bool fail) {
create_dir_if_missing_failure_ = fail;
}
Status CreateDirIfMissing(const std::string& d) override {
if (create_dir_if_missing_failure_) {
return Status::IOError("SimulatedFailure");
}
return EnvWrapper::CreateDirIfMissing(d);
}
void SetNewDirectoryFailure(bool fail) { new_directory_failure_ = fail; }
Status NewDirectory(const std::string& name,
std::unique_ptr<Directory>* result) override {
if (new_directory_failure_) {
return Status::IOError("SimulatedFailure");
}
return EnvWrapper::NewDirectory(name, result);
}
void ClearFileOpenCounters() {
MutexLock l(&mutex_);
num_rand_readers_ = 0;
num_direct_rand_readers_ = 0;
num_seq_readers_ = 0;
num_direct_seq_readers_ = 0;
num_writers_ = 0;
num_direct_writers_ = 0;
}
int num_rand_readers() { return num_rand_readers_; }
int num_direct_rand_readers() { return num_direct_rand_readers_; }
int num_seq_readers() { return num_seq_readers_; }
int num_direct_seq_readers() { return num_direct_seq_readers_; }
int num_writers() { return num_writers_; }
int num_direct_writers() { return num_direct_writers_; }
private:
port::Mutex mutex_;
bool dummy_sequential_file_ = false;
bool dummy_sequential_file_fail_reads_ = false;
std::vector<std::string> written_files_;
std::vector<std::string> filenames_for_mocked_attrs_;
uint64_t limit_written_files_ = 1000000;
uint64_t limit_delete_files_ = 1000000;
bool fail_delete_files_ = false;
bool get_children_failure_ = false;
bool create_dir_if_missing_failure_ = false;
bool new_directory_failure_ = false;
// Keeps track of how many files of each type were successfully opened, and
// out of those, how many were opened with direct I/O.
std::atomic<int> num_rand_readers_;
std::atomic<int> num_direct_rand_readers_;
std::atomic<int> num_seq_readers_;
std::atomic<int> num_direct_seq_readers_;
std::atomic<int> num_writers_;
std::atomic<int> num_direct_writers_;
}; // TestEnv
class FileManager : public EnvWrapper {
public:
explicit FileManager(Env* t) : EnvWrapper(t), rnd_(5) {}
Status GetRandomFileInDir(const std::string& dir, std::string* fname,
uint64_t* fsize) {
std::vector<FileAttributes> children;
GetChildrenFileAttributes(dir, &children);
if (children.size() <= 2) { // . and ..
return Status::NotFound("Empty directory: " + dir);
}
assert(fname != nullptr);
while (true) {
int i = rnd_.Next() % children.size();
if (children[i].name != "." && children[i].name != "..") {
fname->assign(dir + "/" + children[i].name);
*fsize = children[i].size_bytes;
return Status::OK();
}
}
// should never get here
assert(false);
return Status::NotFound("");
}
Status DeleteRandomFileInDir(const std::string& dir) {
std::vector<std::string> children;
GetChildren(dir, &children);
if (children.size() <= 2) { // . and ..
return Status::NotFound("");
}
while (true) {
int i = rnd_.Next() % children.size();
if (children[i] != "." && children[i] != "..") {
return DeleteFile(dir + "/" + children[i]);
}
}
// should never get here
assert(false);
return Status::NotFound("");
}
Status AppendToRandomFileInDir(const std::string& dir,
const std::string& data) {
std::vector<std::string> children;
GetChildren(dir, &children);
if (children.size() <= 2) {
return Status::NotFound("");
}
while (true) {
int i = rnd_.Next() % children.size();
if (children[i] != "." && children[i] != "..") {
return WriteToFile(dir + "/" + children[i], data);
}
}
// should never get here
assert(false);
return Status::NotFound("");
}
Status CorruptFile(const std::string& fname, uint64_t bytes_to_corrupt) {
std::string file_contents;
Status s = ReadFileToString(this, fname, &file_contents);
if (!s.ok()) {
return s;
}
s = DeleteFile(fname);
if (!s.ok()) {
return s;
}
for (uint64_t i = 0; i < bytes_to_corrupt; ++i) {
std::string tmp = rnd_.RandomString(1);
file_contents[rnd_.Next() % file_contents.size()] = tmp[0];
}
return WriteToFile(fname, file_contents);
}
Status CorruptChecksum(const std::string& fname, bool appear_valid) {
std::string metadata;
Status s = ReadFileToString(this, fname, &metadata);
if (!s.ok()) {
return s;
}
s = DeleteFile(fname);
if (!s.ok()) {
return s;
}
auto pos = metadata.find("private");
if (pos == std::string::npos) {
return Status::Corruption("private file is expected");
}
pos = metadata.find(" crc32 ", pos + 6);
if (pos == std::string::npos) {
return Status::Corruption("checksum not found");
}
if (metadata.size() < pos + 7) {
return Status::Corruption("bad CRC32 checksum value");
}
if (appear_valid) {
if (metadata[pos + 8] == '\n') {
// single digit value, safe to insert one more digit
metadata.insert(pos + 8, 1, '0');
} else {
metadata.erase(pos + 8, 1);
}
} else {
metadata[pos + 7] = 'a';
}
return WriteToFile(fname, metadata);
}
Status WriteToFile(const std::string& fname, const std::string& data) {
std::unique_ptr<WritableFile> file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
Status s = EnvWrapper::NewWritableFile(fname, &file, env_options);
if (!s.ok()) {
return s;
}
return file->Append(Slice(data));
}
private:
Random rnd_;
}; // FileManager
// utility functions
namespace {
enum FillDBFlushAction {
kFlushMost,
kFlushAll,
kAutoFlushOnly,
};
// Many tests in this file expect FillDB to write at least one sst file,
// so the default behavior (if not kAutoFlushOnly) of FillDB is to force
// a flush. But to ensure coverage of the WAL file case, we also (by default)
// do one Put after the Flush (kFlushMost).
size_t FillDB(DB* db, int from, int to,
FillDBFlushAction flush_action = kFlushMost) {
size_t bytes_written = 0;
for (int i = from; i < to; ++i) {
std::string key = "testkey" + ToString(i);
std::string value = "testvalue" + ToString(i);
bytes_written += key.size() + value.size();
EXPECT_OK(db->Put(WriteOptions(), Slice(key), Slice(value)));
if (flush_action == kFlushMost && i == to - 2) {
EXPECT_OK(db->Flush(FlushOptions()));
}
}
if (flush_action == kFlushAll) {
EXPECT_OK(db->Flush(FlushOptions()));
}
return bytes_written;
}
void AssertExists(DB* db, int from, int to) {
for (int i = from; i < to; ++i) {
std::string key = "testkey" + ToString(i);
std::string value;
Status s = db->Get(ReadOptions(), Slice(key), &value);
ASSERT_EQ(value, "testvalue" + ToString(i));
}
}
void AssertEmpty(DB* db, int from, int to) {
for (int i = from; i < to; ++i) {
std::string key = "testkey" + ToString(i);
std::string value = "testvalue" + ToString(i);
Status s = db->Get(ReadOptions(), Slice(key), &value);
ASSERT_TRUE(s.IsNotFound());
}
}
} // namespace
class BackupableDBTest : public testing::Test {
public:
enum ShareOption {
kNoShare,
kShareNoChecksum,
kShareWithChecksum,
};
const std::vector<ShareOption> kAllShareOptions = {
kNoShare, kShareNoChecksum, kShareWithChecksum};
BackupableDBTest() {
// set up files
std::string db_chroot = test::PerThreadDBPath("backupable_db");
std::string backup_chroot = test::PerThreadDBPath("backupable_db_backup");
Env::Default()->CreateDir(db_chroot);
Env::Default()->CreateDir(backup_chroot);
dbname_ = "/tempdb";
backupdir_ = "/tempbk";
// set up envs
db_chroot_env_.reset(NewChrootEnv(Env::Default(), db_chroot));
backup_chroot_env_.reset(NewChrootEnv(Env::Default(), backup_chroot));
test_db_env_.reset(new TestEnv(db_chroot_env_.get()));
test_backup_env_.reset(new TestEnv(backup_chroot_env_.get()));
file_manager_.reset(new FileManager(backup_chroot_env_.get()));
// set up db options
options_.create_if_missing = true;
options_.paranoid_checks = true;
options_.write_buffer_size = 1 << 17; // 128KB
options_.env = test_db_env_.get();
options_.wal_dir = dbname_;
// Create logger
DBOptions logger_options;
logger_options.env = db_chroot_env_.get();
CreateLoggerFromOptions(dbname_, logger_options, &logger_);
// set up backup db options
backupable_options_.reset(new BackupableDBOptions(
backupdir_, test_backup_env_.get(), true, logger_.get(), true));
// most tests will use multi-threaded backups
backupable_options_->max_background_operations = 7;
// delete old files in db
DestroyDB(dbname_, options_);
}
DB* OpenDB() {
DB* db;
EXPECT_OK(DB::Open(options_, dbname_, &db));
return db;
}
void CloseAndReopenDB() {
// Close DB
db_.reset();
// Open DB
test_db_env_->SetLimitWrittenFiles(1000000);
DB* db;
ASSERT_OK(DB::Open(options_, dbname_, &db));
db_.reset(db);
}
void InitializeDBAndBackupEngine(bool dummy = false) {
// reset all the db env defaults
test_db_env_->SetLimitWrittenFiles(1000000);
test_db_env_->SetDummySequentialFile(dummy);
DB* db;
if (dummy) {
dummy_db_ = new DummyDB(options_, dbname_);
db = dummy_db_;
} else {
ASSERT_OK(DB::Open(options_, dbname_, &db));
}
db_.reset(db);
}
virtual void OpenDBAndBackupEngine(
bool destroy_old_data = false, bool dummy = false,
ShareOption shared_option = kShareNoChecksum) {
InitializeDBAndBackupEngine(dummy);
// reset backup env defaults
test_backup_env_->SetLimitWrittenFiles(1000000);
backupable_options_->destroy_old_data = destroy_old_data;
backupable_options_->share_table_files = shared_option != kNoShare;
backupable_options_->share_files_with_checksum =
shared_option == kShareWithChecksum;
OpenBackupEngine(destroy_old_data);
}
void CloseDBAndBackupEngine() {
db_.reset();
backup_engine_.reset();
}
void OpenBackupEngine(bool destroy_old_data = false) {
backupable_options_->destroy_old_data = destroy_old_data;
BackupEngine* backup_engine;
ASSERT_OK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
backup_engine_.reset(backup_engine);
}
void CloseBackupEngine() { backup_engine_.reset(nullptr); }
// restores backup backup_id and asserts the existence of
// [start_exist, end_exist> and not-existence of
// [end_exist, end>
//
// if backup_id == 0, it means restore from latest
// if end == 0, don't check AssertEmpty
void AssertBackupConsistency(BackupID backup_id, uint32_t start_exist,
uint32_t end_exist, uint32_t end = 0,
bool keep_log_files = false) {
RestoreOptions restore_options(keep_log_files);
bool opened_backup_engine = false;
if (backup_engine_.get() == nullptr) {
opened_backup_engine = true;
OpenBackupEngine();
}
if (backup_id > 0) {
ASSERT_OK(backup_engine_->RestoreDBFromBackup(backup_id, dbname_, dbname_,
restore_options));
} else {
ASSERT_OK(backup_engine_->RestoreDBFromLatestBackup(dbname_, dbname_,
restore_options));
}
DB* db = OpenDB();
AssertExists(db, start_exist, end_exist);
if (end != 0) {
AssertEmpty(db, end_exist, end);
}
delete db;
if (opened_backup_engine) {
CloseBackupEngine();
}
}
void DeleteLogFiles() {
std::vector<std::string> delete_logs;
db_chroot_env_->GetChildren(dbname_, &delete_logs);
for (auto f : delete_logs) {
uint64_t number;
FileType type;
bool ok = ParseFileName(f, &number, &type);
if (ok && type == kLogFile) {
db_chroot_env_->DeleteFile(dbname_ + "/" + f);
}
}
}
Status CorruptRandomTableFileInDB() {
Random rnd(6);
std::vector<FileAttributes> children;
test_db_env_->GetChildrenFileAttributes(dbname_, &children);
if (children.size() <= 2) { // . and ..
return Status::NotFound("");
}
std::string fname;
uint64_t fsize = 0;
while (true) {
int i = rnd.Next() % children.size();
fname = children[i].name;
fsize = children[i].size_bytes;
// find an sst file
if (fsize > 0 && fname.length() > 4 &&
fname.rfind(".sst") == fname.length() - 4) {
fname = dbname_ + "/" + fname;
break;
}
}
std::string file_contents;
Status s = ReadFileToString(test_db_env_.get(), fname, &file_contents);
if (!s.ok()) {
return s;
}
s = test_db_env_->DeleteFile(fname);
if (!s.ok()) {
return s;
}
file_contents[0] = (file_contents[0] + 257) % 256;
return WriteStringToFile(test_db_env_.get(), file_contents, fname);
}
// files
std::string dbname_;
std::string backupdir_;
// logger_ must be above backup_engine_ such that the engine's destructor,
// which uses a raw pointer to the logger, executes first.
std::shared_ptr<Logger> logger_;
// envs
std::unique_ptr<Env> db_chroot_env_;
std::unique_ptr<Env> backup_chroot_env_;
std::unique_ptr<TestEnv> test_db_env_;
std::unique_ptr<TestEnv> test_backup_env_;
std::unique_ptr<FileManager> file_manager_;
// all the dbs!
DummyDB* dummy_db_; // BackupableDB owns dummy_db_
std::unique_ptr<DB> db_;
std::unique_ptr<BackupEngine> backup_engine_;
// options
Options options_;
protected:
std::unique_ptr<BackupableDBOptions> backupable_options_;
}; // BackupableDBTest
void AppendPath(const std::string& path, std::vector<std::string>& v) {
for (auto& f : v) {
f = path + f;
}
}
class BackupableDBTestWithParam : public BackupableDBTest,
public testing::WithParamInterface<bool> {
public:
BackupableDBTestWithParam() {
backupable_options_->share_files_with_checksum = GetParam();
}
void OpenDBAndBackupEngine(
bool destroy_old_data = false, bool dummy = false,
ShareOption shared_option = kShareNoChecksum) override {
BackupableDBTest::InitializeDBAndBackupEngine(dummy);
// reset backup env defaults
test_backup_env_->SetLimitWrittenFiles(1000000);
backupable_options_->destroy_old_data = destroy_old_data;
backupable_options_->share_table_files = shared_option != kNoShare;
// NOTE: keep share_files_with_checksum setting from constructor
OpenBackupEngine(destroy_old_data);
}
};
TEST_F(BackupableDBTest, DbAndBackupSameCustomChecksum) {
const int keys_iteration = 5000;
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
// backup uses it default crc32c
for (const auto& sopt : kAllShareOptions) {
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration + 1);
// delete old data
DestroyDB(dbname_, options_);
}
// backup uses db crc32c
backupable_options_->file_checksum_gen_factory =
GetFileChecksumGenCrc32cFactory();
for (const auto& sopt : kAllShareOptions) {
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration + 1);
// delete old data
DestroyDB(dbname_, options_);
}
std::shared_ptr<FileChecksumGenFactory> hash_factory =
std::make_shared<FileHashGenFactory>();
options_.file_checksum_gen_factory = hash_factory;
backupable_options_->file_checksum_gen_factory = hash_factory;
for (const auto& sopt : kAllShareOptions) {
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration + 1);
// delete old data
DestroyDB(dbname_, options_);
}
// Mimic a checksum mismatch for custom checksum function by using a dummy
// checksum function with a state
std::shared_ptr<FileChecksumGenFactory> dummy_factory_0 =
std::make_shared<DummyFileChecksumGenFactory>(false);
std::shared_ptr<FileChecksumGenFactory> dummy_factory_1 =
std::make_shared<DummyFileChecksumGenFactory>(true);
FileChecksumGenContext context;
// Both factories have the same generator name
std::string dummy_checksum_function_name =
dummy_factory_0->CreateFileChecksumGenerator(context)->Name();
options_.file_checksum_gen_factory = dummy_factory_0;
for (const auto& sopt : kAllShareOptions) {
backupable_options_->file_checksum_gen_factory = dummy_factory_1;
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
// DB and backup engine do not have the same custom checksum function
// "state"
Status s = backup_engine_->CreateNewBackup(db_.get());
ASSERT_NOK(s);
ASSERT_TRUE(
s.ToString().find("Corruption: " + dummy_checksum_function_name +
" mismatch") != std::string::npos);
CloseBackupEngine();
// Change custom checksum function and try again
backupable_options_->file_checksum_gen_factory = dummy_factory_0;
OpenBackupEngine(true /* destroy_old_data */);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
ASSERT_OK(backup_engine_->RestoreDBFromBackup(1, dbname_, dbname_));
CloseBackupEngine();
// Try verifying or restoring a backup using a different custom checksum
// function "state"
backupable_options_->file_checksum_gen_factory = dummy_factory_1;
OpenBackupEngine(false /* destroy_old_data */);
ASSERT_NOK(backup_engine_->VerifyBackup(1, true));
ASSERT_NOK(backup_engine_->RestoreDBFromBackup(1, dbname_, dbname_));
CloseDBAndBackupEngine();
// delete old data
DestroyDB(dbname_, options_);
}
}
TEST_F(BackupableDBTest, CustomChecksumTransition) {
const int keys_iteration = 5000;
std::shared_ptr<FileChecksumGenFactory> hash32_factory =
std::make_shared<FileHash32GenFactory>();
std::shared_ptr<FileChecksumGenFactory> hash_factory =
std::make_shared<FileHashGenFactory>();
for (const auto& sopt : kAllShareOptions) {
// 1) with one custom checksum function (FileHash32GenFactory) for both
// db and backup
int i = 0;
options_.file_checksum_gen_factory = hash32_factory;
backupable_options_->file_checksum_gen_factory = hash32_factory;
// open with old backup
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
// verify the backup with checksum
ASSERT_OK(backup_engine_->VerifyBackup(i + 1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (i + 2));
// 2) with two custom checksum functions (FileHashGenFactory) for db
// but one custom checksum function (FileHash32GenFactory) for backup
++i;
options_.file_checksum_gen_factory = hash_factory;
backupable_options_->file_checksum_gen_factory = hash32_factory;
// open with old backup
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
FillDB(db_.get(), 0, keys_iteration * (i + 1));
// note that the checksum factory for backup does not know the custom
// checksum function used in the db
ASSERT_NOK(backup_engine_->CreateNewBackup(db_.get()));
// but it knows the custom checksum function for the older backup
ASSERT_OK(backup_engine_->VerifyBackup(i, true));
// reset the factory to nullptr and try again
CloseBackupEngine();
backupable_options_->file_checksum_gen_factory = nullptr;
OpenBackupEngine();
ASSERT_NOK(backup_engine_->DeleteBackup(i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(i + 1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(i, 0, keys_iteration * i, keys_iteration * (i + 1));
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (i + 2));
// Now set the factory to the same as the one used in the db
backupable_options_->file_checksum_gen_factory = hash_factory;
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseBackupEngine();
++i;
// Say, we accidentally change the factory
backupable_options_->file_checksum_gen_factory = hash32_factory;
OpenBackupEngine();
// Unable to verify the latest backup.
ASSERT_NOK(backup_engine_->VerifyBackup(i + 1, true));
// Unable to restore the latest backup.
ASSERT_NOK(backup_engine_->RestoreDBFromBackup(i + 1, dbname_, dbname_));
CloseBackupEngine();
// Reset the factory to the same as the one used in the db.
backupable_options_->file_checksum_gen_factory = hash_factory;
OpenBackupEngine();
ASSERT_OK(backup_engine_->VerifyBackup(i + 1, true));
ASSERT_OK(backup_engine_->RestoreDBFromBackup(i + 1, dbname_, dbname_));
ASSERT_OK(backup_engine_->DeleteBackup(i + 1));
--i;
CloseDBAndBackupEngine();
// 3) with one custom checksum function (FileHash32GenFactory) for db
// but two custom checksum functions (FileHashGenFactory) for backup
// note that the checksum factory for backup does know the checksum
// function in the db
++i;
options_.file_checksum_gen_factory = hash32_factory;
backupable_options_->file_checksum_gen_factory = hash_factory;
// open with old backup
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
FillDB(db_.get(), 0, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(i - 1, true));
ASSERT_OK(backup_engine_->VerifyBackup(i, true));
ASSERT_OK(backup_engine_->VerifyBackup(i + 1, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(i - 1, 0, keys_iteration * (i - 1),
keys_iteration * i);
AssertBackupConsistency(i, 0, keys_iteration * i, keys_iteration * (i + 1));
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (i + 2));
// 4) no custom checksums
++i;
options_.file_checksum_gen_factory = nullptr;
backupable_options_->file_checksum_gen_factory = nullptr;
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
FillDB(db_.get(), 0, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
for (int j = 0; j <= i; ++j) {
ASSERT_OK(backup_engine_->VerifyBackup(j + 1, true));
}
CloseDBAndBackupEngine();
for (int j = 0; j <= i; ++j) {
AssertBackupConsistency(j + 1, 0, keys_iteration * (j + 1),
keys_iteration * (j + 2));
}
// delete old data
DestroyDB(dbname_, options_);
}
}
TEST_F(BackupableDBTest, CustomChecksumNoNewDbTables) {
const int keys_iteration = 5000;
std::vector<std::shared_ptr<FileChecksumGenFactory>> checksum_factories{
nullptr, GetFileChecksumGenCrc32cFactory(),
std::make_shared<FileHash32GenFactory>(),
std::make_shared<FileHashGenFactory>()};
for (const auto& sopt : kAllShareOptions) {
for (const auto& f : checksum_factories) {
options_.file_checksum_gen_factory = f;
backupable_options_->file_checksum_gen_factory = f;
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */,
sopt);
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
// No new table files have been created since the last backup.
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(2, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * 2);
AssertBackupConsistency(2, 0, keys_iteration, keys_iteration * 2);
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
// No new table files have been created since the last backup and backup
// engine opening
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->VerifyBackup(3, true));
CloseDBAndBackupEngine();
AssertBackupConsistency(3, 0, keys_iteration, keys_iteration * 2);
// delete old data
DestroyDB(dbname_, options_);
}
}
}
TEST_F(BackupableDBTest, FileCollision) {
const int keys_iteration = 5000;
for (const auto& sopt : kAllShareOptions) {
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
// If the db directory has been cleaned up, it is sensitive to file
// collision.
DestroyDB(dbname_, options_);
// open with old backup
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
sopt);
FillDB(db_.get(), 0, keys_iteration * 2);
if (sopt != kShareNoChecksum) {
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
} else {
// The new table files created in FillDB() will clash with the old
// backup and sharing tables with no checksum will have the file
// collision problem.
ASSERT_NOK(backup_engine_->CreateNewBackup(db_.get()));
ASSERT_OK(backup_engine_->PurgeOldBackups(0));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
}
CloseDBAndBackupEngine();
// delete old data
DestroyDB(dbname_, options_);
}
}
// This test verifies that the verifyBackup method correctly identifies
// invalid backups
TEST_P(BackupableDBTestWithParam, VerifyBackup) {
const int keys_iteration = 5000;
Status s;
OpenDBAndBackupEngine(true);
// create five backups
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
// ---------- case 1. - valid backup -----------
ASSERT_TRUE(backup_engine_->VerifyBackup(1).ok());
// ---------- case 2. - delete a file -----------i
file_manager_->DeleteRandomFileInDir(backupdir_ + "/private/1");
ASSERT_TRUE(backup_engine_->VerifyBackup(1).IsNotFound());
// ---------- case 3. - corrupt a file -----------
std::string append_data = "Corrupting a random file";
file_manager_->AppendToRandomFileInDir(backupdir_ + "/private/2",
append_data);
ASSERT_TRUE(backup_engine_->VerifyBackup(2).IsCorruption());
// ---------- case 4. - invalid backup -----------
ASSERT_TRUE(backup_engine_->VerifyBackup(6).IsNotFound());
CloseDBAndBackupEngine();
}
// open DB, write, close DB, backup, restore, repeat
TEST_P(BackupableDBTestWithParam, OfflineIntegrationTest) {
// has to be a big number, so that it triggers the memtable flush
const int keys_iteration = 5000;
const int max_key = keys_iteration * 4 + 10;
// first iter -- flush before backup
// second iter -- don't flush before backup
for (int iter = 0; iter < 2; ++iter) {
// delete old data
DestroyDB(dbname_, options_);
bool destroy_data = true;
// every iteration --
// 1. insert new data in the DB
// 2. backup the DB
// 3. destroy the db
// 4. restore the db, check everything is still there
for (int i = 0; i < 5; ++i) {
// in last iteration, put smaller amount of data,
int fill_up_to = std::min(keys_iteration * (i + 1), max_key);
// ---- insert new data and back up ----
OpenDBAndBackupEngine(destroy_data);
destroy_data = false;
// kAutoFlushOnly to preserve legacy test behavior (consider updating)
FillDB(db_.get(), keys_iteration * i, fill_up_to, kAutoFlushOnly);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), iter == 0));
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
// ---- make sure it's empty ----
DB* db = OpenDB();
AssertEmpty(db, 0, fill_up_to);
delete db;
// ---- restore the DB ----
OpenBackupEngine();
if (i >= 3) { // test purge old backups
// when i == 4, purge to only 1 backup
// when i == 3, purge to 2 backups
ASSERT_OK(backup_engine_->PurgeOldBackups(5 - i));
}
// ---- make sure the data is there ---
AssertBackupConsistency(0, 0, fill_up_to, max_key);
CloseBackupEngine();
}
}
}
// open DB, write, backup, write, backup, close, restore
TEST_P(BackupableDBTestWithParam, OnlineIntegrationTest) {
// has to be a big number, so that it triggers the memtable flush
const int keys_iteration = 5000;
const int max_key = keys_iteration * 4 + 10;
Random rnd(7);
// delete old data
DestroyDB(dbname_, options_);
OpenDBAndBackupEngine(true);
// write some data, backup, repeat
for (int i = 0; i < 5; ++i) {
if (i == 4) {
// delete backup number 2, online delete!
ASSERT_OK(backup_engine_->DeleteBackup(2));
}
// in last iteration, put smaller amount of data,
// so that backups can share sst files
int fill_up_to = std::min(keys_iteration * (i + 1), max_key);
// kAutoFlushOnly to preserve legacy test behavior (consider updating)
FillDB(db_.get(), keys_iteration * i, fill_up_to, kAutoFlushOnly);
// we should get consistent results with flush_before_backup
// set to both true and false
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)));
}
// close and destroy
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
// ---- make sure it's empty ----
DB* db = OpenDB();
AssertEmpty(db, 0, max_key);
delete db;
// ---- restore every backup and verify all the data is there ----
OpenBackupEngine();
for (int i = 1; i <= 5; ++i) {
if (i == 2) {
// we deleted backup 2
Status s = backup_engine_->RestoreDBFromBackup(2, dbname_, dbname_);
ASSERT_TRUE(!s.ok());
} else {
int fill_up_to = std::min(keys_iteration * i, max_key);
AssertBackupConsistency(i, 0, fill_up_to, max_key);
}
}
// delete some backups -- this should leave only backups 3 and 5 alive
ASSERT_OK(backup_engine_->DeleteBackup(4));
ASSERT_OK(backup_engine_->PurgeOldBackups(2));
std::vector<BackupInfo> backup_info;
backup_engine_->GetBackupInfo(&backup_info);
ASSERT_EQ(2UL, backup_info.size());
// check backup 3
AssertBackupConsistency(3, 0, 3 * keys_iteration, max_key);
// check backup 5
AssertBackupConsistency(5, 0, max_key);
CloseBackupEngine();
}
INSTANTIATE_TEST_CASE_P(BackupableDBTestWithParam, BackupableDBTestWithParam,
::testing::Bool());
// this will make sure that backup does not copy the same file twice
TEST_F(BackupableDBTest, NoDoubleCopy_And_AutoGC) {
OpenDBAndBackupEngine(true, true);
// should write 5 DB files + one meta file
test_backup_env_->SetLimitWrittenFiles(7);
test_backup_env_->ClearWrittenFiles();
test_db_env_->SetLimitWrittenFiles(0);
dummy_db_->live_files_ = {"/00010.sst", "/00011.sst", "/CURRENT",
"/MANIFEST-01"};
dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
test_db_env_->SetFilenamesForMockedAttrs(dummy_db_->live_files_);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), false));
std::vector<std::string> should_have_written = {
"/shared/.00010.sst.tmp", "/shared/.00011.sst.tmp", "/private/1/CURRENT",
"/private/1/MANIFEST-01", "/private/1/00011.log", "/meta/.1.tmp"};
AppendPath(backupdir_, should_have_written);
test_backup_env_->AssertWrittenFiles(should_have_written);
char db_number = '1';
for (std::string other_sst : {"00015.sst", "00017.sst", "00019.sst"}) {
// should write 4 new DB files + one meta file
// should not write/copy 00010.sst, since it's already there!
test_backup_env_->SetLimitWrittenFiles(6);
test_backup_env_->ClearWrittenFiles();
dummy_db_->live_files_ = {"/00010.sst", "/" + other_sst, "/CURRENT",
"/MANIFEST-01"};
dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
test_db_env_->SetFilenamesForMockedAttrs(dummy_db_->live_files_);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), false));
// should not open 00010.sst - it's already there
++db_number;
std::string private_dir = std::string("/private/") + db_number;
should_have_written = {
"/shared/." + other_sst + ".tmp", private_dir + "/CURRENT",
private_dir + "/MANIFEST-01", private_dir + "/00011.log",
std::string("/meta/.") + db_number + ".tmp"};
AppendPath(backupdir_, should_have_written);
test_backup_env_->AssertWrittenFiles(should_have_written);
}
ASSERT_OK(backup_engine_->DeleteBackup(1));
ASSERT_OK(test_backup_env_->FileExists(backupdir_ + "/shared/00010.sst"));
// 00011.sst was only in backup 1, should be deleted
ASSERT_EQ(Status::NotFound(),
test_backup_env_->FileExists(backupdir_ + "/shared/00011.sst"));
ASSERT_OK(test_backup_env_->FileExists(backupdir_ + "/shared/00015.sst"));
// MANIFEST file size should be only 100
uint64_t size = 0;
test_backup_env_->GetFileSize(backupdir_ + "/private/2/MANIFEST-01", &size);
ASSERT_EQ(100UL, size);
test_backup_env_->GetFileSize(backupdir_ + "/shared/00015.sst", &size);
ASSERT_EQ(200UL, size);
CloseBackupEngine();
//
// Now simulate incomplete delete by removing just meta
//
ASSERT_OK(test_backup_env_->DeleteFile(backupdir_ + "/meta/2"));
OpenBackupEngine();
// 1 appears to be removed, so
// 2 non-corrupt and 0 corrupt seen
std::vector<BackupInfo> backup_info;
std::vector<BackupID> corrupt_backup_ids;
backup_engine_->GetBackupInfo(&backup_info);
backup_engine_->GetCorruptedBackups(&corrupt_backup_ids);
ASSERT_EQ(2UL, backup_info.size());
ASSERT_EQ(0UL, corrupt_backup_ids.size());
// Keep the two we see, but this should suffice to purge unreferenced
// shared files from incomplete delete.
ASSERT_OK(backup_engine_->PurgeOldBackups(2));
// Make sure dangling sst file has been removed (somewhere along this
// process). GarbageCollect should not be needed.
ASSERT_EQ(Status::NotFound(),
test_backup_env_->FileExists(backupdir_ + "/shared/00015.sst"));
ASSERT_OK(test_backup_env_->FileExists(backupdir_ + "/shared/00017.sst"));
ASSERT_OK(test_backup_env_->FileExists(backupdir_ + "/shared/00019.sst"));
// Now actually purge a good one
ASSERT_OK(backup_engine_->PurgeOldBackups(1));
ASSERT_EQ(Status::NotFound(),
test_backup_env_->FileExists(backupdir_ + "/shared/00017.sst"));
ASSERT_OK(test_backup_env_->FileExists(backupdir_ + "/shared/00019.sst"));
CloseDBAndBackupEngine();
}
// test various kind of corruptions that may happen:
// 1. Not able to write a file for backup - that backup should fail,
// everything else should work
// 2. Corrupted backup meta file or missing backuped file - we should
// not be able to open that backup, but all other backups should be
// fine
// 3. Corrupted checksum value - if the checksum is not a valid uint32_t,
// db open should fail, otherwise, it aborts during the restore process.
TEST_F(BackupableDBTest, CorruptionsTest) {
const int keys_iteration = 5000;
Random rnd(6);
Status s;
OpenDBAndBackupEngine(true);
// create five backups
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)));
}
// ---------- case 1. - fail a write -----------
// try creating backup 6, but fail a write
FillDB(db_.get(), keys_iteration * 5, keys_iteration * 6);
test_backup_env_->SetLimitWrittenFiles(2);
// should fail
s = backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2));
ASSERT_TRUE(!s.ok());
test_backup_env_->SetLimitWrittenFiles(1000000);
// latest backup should have all the keys
CloseDBAndBackupEngine();
AssertBackupConsistency(0, 0, keys_iteration * 5, keys_iteration * 6);
// --------- case 2. corrupted backup meta or missing backuped file ----
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/meta/5", 3));
// since 5 meta is now corrupted, latest backup should be 4
AssertBackupConsistency(0, 0, keys_iteration * 4, keys_iteration * 5);
OpenBackupEngine();
s = backup_engine_->RestoreDBFromBackup(5, dbname_, dbname_);
ASSERT_TRUE(!s.ok());
CloseBackupEngine();
ASSERT_OK(file_manager_->DeleteRandomFileInDir(backupdir_ + "/private/4"));
// 4 is corrupted, 3 is the latest backup now
AssertBackupConsistency(0, 0, keys_iteration * 3, keys_iteration * 5);
OpenBackupEngine();
s = backup_engine_->RestoreDBFromBackup(4, dbname_, dbname_);
CloseBackupEngine();
ASSERT_TRUE(!s.ok());
// --------- case 3. corrupted checksum value ----
ASSERT_OK(file_manager_->CorruptChecksum(backupdir_ + "/meta/3", false));
// checksum of backup 3 is an invalid value, this can be detected at
// db open time, and it reverts to the previous backup automatically
AssertBackupConsistency(0, 0, keys_iteration * 2, keys_iteration * 5);
// checksum of the backup 2 appears to be valid, this can cause checksum
// mismatch and abort restore process
ASSERT_OK(file_manager_->CorruptChecksum(backupdir_ + "/meta/2", true));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/2"));
OpenBackupEngine();
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/2"));
s = backup_engine_->RestoreDBFromBackup(2, dbname_, dbname_);
ASSERT_TRUE(!s.ok());
// make sure that no corrupt backups have actually been deleted!
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/1"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/2"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/3"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/4"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/5"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/1"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/2"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/3"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/4"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/5"));
// delete the corrupt backups and then make sure they're actually deleted
ASSERT_OK(backup_engine_->DeleteBackup(5));
ASSERT_OK(backup_engine_->DeleteBackup(4));
ASSERT_OK(backup_engine_->DeleteBackup(3));
ASSERT_OK(backup_engine_->DeleteBackup(2));
// Should not be needed anymore with auto-GC on DeleteBackup
//(void)backup_engine_->GarbageCollect();
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/meta/5"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/private/5"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/meta/4"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/private/4"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/meta/3"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/private/3"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/meta/2"));
ASSERT_EQ(Status::NotFound(),
file_manager_->FileExists(backupdir_ + "/private/2"));
CloseBackupEngine();
AssertBackupConsistency(0, 0, keys_iteration * 1, keys_iteration * 5);
// new backup should be 2!
OpenDBAndBackupEngine();
FillDB(db_.get(), keys_iteration * 1, keys_iteration * 2);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)));
CloseDBAndBackupEngine();
AssertBackupConsistency(2, 0, keys_iteration * 2, keys_iteration * 5);
}
// Corrupt a file but maintain its size
TEST_F(BackupableDBTest, CorruptFileMaintainSize) {
const int keys_iteration = 5000;
Status s;
OpenDBAndBackupEngine(true);
// create a backup
FillDB(db_.get(), 0, keys_iteration);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
// verify with file size
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
// verify with file checksum
ASSERT_OK(backup_engine_->VerifyBackup(1, true));
std::string file_to_corrupt;
uint64_t file_size = 0;
// under normal circumstance, there should be at least one nonempty file
while (file_size == 0) {
// get a random file in /private/1
ASSERT_OK(file_manager_->GetRandomFileInDir(backupdir_ + "/private/1",
&file_to_corrupt, &file_size));
// corrupt the file by replacing its content by file_size random bytes
ASSERT_OK(file_manager_->CorruptFile(file_to_corrupt, file_size));
}
// file sizes match
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
// file checksums mismatch
ASSERT_NOK(backup_engine_->VerifyBackup(1, true));
// sanity check, use default second argument
ASSERT_OK(backup_engine_->VerifyBackup(1));
CloseDBAndBackupEngine();
// an extra challenge
// set share_files_with_checksum to true and do two more backups
// corrupt all the table files in shared_checksum but maintain their sizes
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */,
kShareWithChecksum);
// creat two backups
for (int i = 1; i < 3; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
std::vector<FileAttributes> children;
const std::string dir = backupdir_ + "/shared_checksum";
ASSERT_OK(file_manager_->GetChildrenFileAttributes(dir, &children));
for (const auto& child : children) {
if (child.name == "." || child.name == ".." || child.size_bytes == 0) {
continue;
}
// corrupt the file by replacing its content by file_size random bytes
ASSERT_OK(
file_manager_->CorruptFile(dir + "/" + child.name, child.size_bytes));
}
// file sizes match
ASSERT_OK(backup_engine_->VerifyBackup(1, false));
ASSERT_OK(backup_engine_->VerifyBackup(2, false));
// file checksums mismatch
ASSERT_NOK(backup_engine_->VerifyBackup(1, true));
ASSERT_NOK(backup_engine_->VerifyBackup(2, true));
CloseDBAndBackupEngine();
}
// Test if BackupEngine will fail to create new backup if some table has been
// corrupted and the table file checksum is stored in the DB manifest
TEST_F(BackupableDBTest, TableFileCorruptedBeforeBackup) {
const int keys_iteration = 50000;
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */,
kNoShare);
FillDB(db_.get(), 0, keys_iteration);
CloseAndReopenDB();
// corrupt a random table file in the DB directory
ASSERT_OK(CorruptRandomTableFileInDB());
// file_checksum_gen_factory is null, and thus table checksum is not
// verified for creating a new backup; no correction is detected
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
// delete old files in db
ASSERT_OK(DestroyDB(dbname_, options_));
// Enable table file checksum in DB manifest
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */,
kNoShare);
FillDB(db_.get(), 0, keys_iteration);
CloseAndReopenDB();
// corrupt a random table file in the DB directory
ASSERT_OK(CorruptRandomTableFileInDB());
// table file checksum is enabled so we should be able to detect any
// corruption
ASSERT_NOK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
}
// Test if BackupEngine will fail to create new backup if some table has been
// corrupted and the table file checksum is stored in the DB manifest for the
// case when backup table files will be stored in a shared directory
TEST_P(BackupableDBTestWithParam, TableFileCorruptedBeforeBackup) {
const int keys_iteration = 50000;
OpenDBAndBackupEngine(true /* destroy_old_data */);
FillDB(db_.get(), 0, keys_iteration);
CloseAndReopenDB();
// corrupt a random table file in the DB directory
ASSERT_OK(CorruptRandomTableFileInDB());
// cannot detect corruption since DB manifest has no table checksums
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
// delete old files in db
ASSERT_OK(DestroyDB(dbname_, options_));
// Enable table checksums in DB manifest
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
OpenDBAndBackupEngine(true /* destroy_old_data */);
FillDB(db_.get(), 0, keys_iteration);
CloseAndReopenDB();
// corrupt a random table file in the DB directory
ASSERT_OK(CorruptRandomTableFileInDB());
// corruption is detected
ASSERT_NOK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
}
TEST_F(BackupableDBTest, TableFileWithoutDbChecksumCorruptedDuringBackup) {
const int keys_iteration = 50000;
backupable_options_->share_files_with_checksum_naming = kChecksumAndFileSize;
// When share_files_with_checksum is on, we calculate checksums of table
// files before and after copying. So we can test whether a corruption has
// happened during the file is copied to backup directory.
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */,
kShareWithChecksum);
FillDB(db_.get(), 0, keys_iteration);
bool corrupted = false;
// corrupt files when copying to the backup directory
SyncPoint::GetInstance()->SetCallBack(
"BackupEngineImpl::CopyOrCreateFile:CorruptionDuringBackup",
[&](void* data) {
if (data != nullptr) {
Slice* d = reinterpret_cast<Slice*>(data);
if (!d->empty()) {
d->remove_suffix(1);
corrupted = true;
}
}
});
SyncPoint::GetInstance()->EnableProcessing();
Status s = backup_engine_->CreateNewBackup(db_.get());
if (corrupted) {
ASSERT_NOK(s);
} else {
// should not in this path in normal cases
ASSERT_OK(s);
}
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
CloseDBAndBackupEngine();
// delete old files in db
ASSERT_OK(DestroyDB(dbname_, options_));
}
TEST_F(BackupableDBTest, TableFileWithDbChecksumCorruptedDuringBackup) {
const int keys_iteration = 50000;
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
for (auto& sopt : kAllShareOptions) {
// Since the default DB table file checksum is on, we obtain checksums of
// table files from the DB manifest before copying and verify it with the
// one calculated during copying.
// Therefore, we can test whether a corruption has happened during the file
// being copied to backup directory.
OpenDBAndBackupEngine(true /* destroy_old_data */, false /* dummy */, sopt);
FillDB(db_.get(), 0, keys_iteration);
// corrupt files when copying to the backup directory
SyncPoint::GetInstance()->SetCallBack(
"BackupEngineImpl::CopyOrCreateFile:CorruptionDuringBackup",
[&](void* data) {
if (data != nullptr) {
Slice* d = reinterpret_cast<Slice*>(data);
if (!d->empty()) {
d->remove_suffix(1);
}
}
});
SyncPoint::GetInstance()->EnableProcessing();
// The only case that we can't detect a corruption is when the file
// being backed up is empty. But as keys_iteration is large, such
// a case shouldn't have happened and we should be able to detect
// the corruption.
ASSERT_NOK(backup_engine_->CreateNewBackup(db_.get()));
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
CloseDBAndBackupEngine();
// delete old files in db
ASSERT_OK(DestroyDB(dbname_, options_));
}
}
TEST_F(BackupableDBTest, InterruptCreationTest) {
// Interrupt backup creation by failing new writes and failing cleanup of the
// partial state. Then verify a subsequent backup can still succeed.
const int keys_iteration = 5000;
Random rnd(6);
OpenDBAndBackupEngine(true /* destroy_old_data */);
FillDB(db_.get(), 0, keys_iteration);
test_backup_env_->SetLimitWrittenFiles(2);
test_backup_env_->SetDeleteFileFailure(true);
// should fail creation
ASSERT_FALSE(
backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)).ok());
CloseDBAndBackupEngine();
// should also fail cleanup so the tmp directory stays behind
ASSERT_OK(backup_chroot_env_->FileExists(backupdir_ + "/private/1/"));
OpenDBAndBackupEngine(false /* destroy_old_data */);
test_backup_env_->SetLimitWrittenFiles(1000000);
test_backup_env_->SetDeleteFileFailure(false);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)));
// latest backup should have all the keys
CloseDBAndBackupEngine();
AssertBackupConsistency(0, 0, keys_iteration);
}
inline std::string OptionsPath(std::string ret, int backupID) {
ret += "/private/";
ret += std::to_string(backupID);
ret += "/";
return ret;
}
// Backup the LATEST options file to
// "<backup_dir>/private/<backup_id>/OPTIONS<number>"
TEST_F(BackupableDBTest, BackupOptions) {
OpenDBAndBackupEngine(true);
for (int i = 1; i < 5; i++) {
std::string name;
std::vector<std::string> filenames;
// Must reset() before reset(OpenDB()) again.
// Calling OpenDB() while *db_ is existing will cause LOCK issue
db_.reset();
db_.reset(OpenDB());
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
ROCKSDB_NAMESPACE::GetLatestOptionsFileName(db_->GetName(), options_.env,
&name);
ASSERT_OK(file_manager_->FileExists(OptionsPath(backupdir_, i) + name));
backup_chroot_env_->GetChildren(OptionsPath(backupdir_, i), &filenames);
for (auto fn : filenames) {
if (fn.compare(0, 7, "OPTIONS") == 0) {
ASSERT_EQ(name, fn);
}
}
}
CloseDBAndBackupEngine();
}
TEST_F(BackupableDBTest, SetOptionsBackupRaceCondition) {
OpenDBAndBackupEngine(true);
SyncPoint::GetInstance()->LoadDependency(
{{"CheckpointImpl::CreateCheckpoint:SavedLiveFiles1",
"BackupableDBTest::SetOptionsBackupRaceCondition:BeforeSetOptions"},
{"BackupableDBTest::SetOptionsBackupRaceCondition:AfterSetOptions",
"CheckpointImpl::CreateCheckpoint:SavedLiveFiles2"}});
SyncPoint::GetInstance()->EnableProcessing();
ROCKSDB_NAMESPACE::port::Thread setoptions_thread{[this]() {
TEST_SYNC_POINT(
"BackupableDBTest::SetOptionsBackupRaceCondition:BeforeSetOptions");
DBImpl* dbi = static_cast<DBImpl*>(db_.get());
// Change arbitrary option to trigger OPTIONS file deletion
ASSERT_OK(dbi->SetOptions(dbi->DefaultColumnFamily(),
{{"paranoid_file_checks", "false"}}));
ASSERT_OK(dbi->SetOptions(dbi->DefaultColumnFamily(),
{{"paranoid_file_checks", "true"}}));
ASSERT_OK(dbi->SetOptions(dbi->DefaultColumnFamily(),
{{"paranoid_file_checks", "false"}}));
TEST_SYNC_POINT(
"BackupableDBTest::SetOptionsBackupRaceCondition:AfterSetOptions");
}};
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
setoptions_thread.join();
CloseDBAndBackupEngine();
}
// This test verifies we don't delete the latest backup when read-only option is
// set
TEST_F(BackupableDBTest, NoDeleteWithReadOnly) {
const int keys_iteration = 5000;
Random rnd(6);
Status s;
OpenDBAndBackupEngine(true);
// create five backups
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(rnd.Next() % 2)));
}
CloseDBAndBackupEngine();
ASSERT_OK(file_manager_->WriteToFile(backupdir_ + "/LATEST_BACKUP", "4"));
backupable_options_->destroy_old_data = false;
BackupEngineReadOnly* read_only_backup_engine;
ASSERT_OK(BackupEngineReadOnly::Open(backup_chroot_env_.get(),
*backupable_options_,
&read_only_backup_engine));
// assert that data from backup 5 is still here (even though LATEST_BACKUP
// says 4 is latest)
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/meta/5"));
ASSERT_OK(file_manager_->FileExists(backupdir_ + "/private/5"));
// Behavior change: We now ignore LATEST_BACKUP contents. This means that
// we should have 5 backups, even if LATEST_BACKUP says 4.
std::vector<BackupInfo> backup_info;
read_only_backup_engine->GetBackupInfo(&backup_info);
ASSERT_EQ(5UL, backup_info.size());
delete read_only_backup_engine;
}
TEST_F(BackupableDBTest, FailOverwritingBackups) {
options_.write_buffer_size = 1024 * 1024 * 1024; // 1GB
options_.disable_auto_compactions = true;
// create backups 1, 2, 3, 4, 5
OpenDBAndBackupEngine(true);
for (int i = 0; i < 5; ++i) {
CloseDBAndBackupEngine();
DeleteLogFiles();
OpenDBAndBackupEngine(false);
FillDB(db_.get(), 100 * i, 100 * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
// restore 3
OpenBackupEngine();
ASSERT_OK(backup_engine_->RestoreDBFromBackup(3, dbname_, dbname_));
CloseBackupEngine();
OpenDBAndBackupEngine(false);
FillDB(db_.get(), 0, 300);
Status s = backup_engine_->CreateNewBackup(db_.get(), true);
// the new backup fails because new table files
// clash with old table files from backups 4 and 5
// (since write_buffer_size is huge, we can be sure that
// each backup will generate only one sst file and that
// a file generated by a new backup is the same as
// sst file generated by backup 4)
ASSERT_TRUE(s.IsCorruption());
ASSERT_OK(backup_engine_->DeleteBackup(4));
ASSERT_OK(backup_engine_->DeleteBackup(5));
// now, the backup can succeed
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
}
TEST_F(BackupableDBTest, NoShareTableFiles) {
const int keys_iteration = 5000;
OpenDBAndBackupEngine(true, false, kNoShare);
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(i % 2)));
}
CloseDBAndBackupEngine();
for (int i = 0; i < 5; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * 6);
}
}
// Verify that you can backup and restore with share_files_with_checksum on
TEST_F(BackupableDBTest, ShareTableFilesWithChecksums) {
const int keys_iteration = 5000;
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(i % 2)));
}
CloseDBAndBackupEngine();
for (int i = 0; i < 5; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * 6);
}
}
// Verify that you can backup and restore using share_files_with_checksum set to
// false and then transition this option to true
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsTransition) {
const int keys_iteration = 5000;
// set share_files_with_checksum to false
OpenDBAndBackupEngine(true, false, kShareNoChecksum);
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
for (int i = 0; i < 5; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * 6);
}
// set share_files_with_checksum to true and do some more backups
OpenDBAndBackupEngine(false /* destroy_old_data */, false,
kShareWithChecksum);
for (int i = 5; i < 10; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
// Verify first (about to delete)
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * 11);
// For an extra challenge, make sure that GarbageCollect / DeleteBackup
// is OK even if we open without share_table_files
OpenDBAndBackupEngine(false /* destroy_old_data */, false, kNoShare);
backup_engine_->DeleteBackup(1);
backup_engine_->GarbageCollect();
CloseDBAndBackupEngine();
// Verify rest (not deleted)
for (int i = 1; i < 10; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * 11);
}
}
// Verify backup and restore with share_files_with_checksum on and
// share_files_with_checksum_naming = kOptionalChecksumAndDbSessionId
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNaming) {
// Use session id in the name of SST files
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kOptionalChecksumAndDbSessionId);
const int keys_iteration = 5000;
int i = 0;
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(i % 2)));
CloseDBAndBackupEngine();
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (i + 2));
// Both checksum and session id in the name of SST files
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
OpenDBAndBackupEngine(false, false, kShareWithChecksum);
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), !!(i % 2)));
CloseDBAndBackupEngine();
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (i + 2));
}
// Verify backup and restore with share_files_with_checksum off and then
// transition this option to on and share_files_with_checksum_naming to be
// kOptionalChecksumAndDbSessionId
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNamingTransition) {
const int keys_iteration = 5000;
// We may set share_files_with_checksum_naming to kChecksumAndFileSize
// here but even if we don't, it should have no effect when
// share_files_with_checksum is false
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kOptionalChecksumAndDbSessionId);
// set share_files_with_checksum to false
OpenDBAndBackupEngine(true, false, kShareNoChecksum);
int j = 3;
for (int i = 0; i < j; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
for (int i = 0; i < j; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (j + 1));
}
// set share_files_with_checksum to true and do some more backups
// and use session id in the name of SST file backup
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kOptionalChecksumAndDbSessionId);
OpenDBAndBackupEngine(false /* destroy_old_data */, false,
kShareWithChecksum);
FillDB(db_.get(), keys_iteration * j, keys_iteration * (j + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
// Use checksum in the name as well
++j;
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
OpenDBAndBackupEngine(false /* destroy_old_data */, false,
kShareWithChecksum);
FillDB(db_.get(), keys_iteration * j, keys_iteration * (j + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
// Verify first (about to delete)
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * (j + 1));
// For an extra challenge, make sure that GarbageCollect / DeleteBackup
// is OK even if we open without share_table_files but with
// share_files_with_checksum_naming being kOptionalChecksumAndDbSessionId
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kOptionalChecksumAndDbSessionId);
OpenDBAndBackupEngine(false /* destroy_old_data */, false, kNoShare);
backup_engine_->DeleteBackup(1);
backup_engine_->GarbageCollect();
CloseDBAndBackupEngine();
// Verify second (about to delete)
AssertBackupConsistency(2, 0, keys_iteration * 2, keys_iteration * (j + 1));
// Use checksum and file size for backup table file names and open without
// share_table_files
// Again, make sure that GarbageCollect / DeleteBackup is OK
backupable_options_->share_files_with_checksum_naming = kChecksumAndFileSize;
OpenDBAndBackupEngine(false /* destroy_old_data */, false, kNoShare);
backup_engine_->DeleteBackup(2);
backup_engine_->GarbageCollect();
CloseDBAndBackupEngine();
// Verify rest (not deleted)
for (int i = 2; i < j; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (j + 1));
}
}
// Verify backup and restore with share_files_with_checksum on and transition
// from kChecksumAndFileSize to kOptionalChecksumAndDbSessionId
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNamingUpgrade) {
backupable_options_->share_files_with_checksum_naming = kChecksumAndFileSize;
const int keys_iteration = 5000;
// set share_files_with_checksum to true
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
int j = 3;
for (int i = 0; i < j; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
}
CloseDBAndBackupEngine();
for (int i = 0; i < j; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (j + 1));
}
backupable_options_->share_files_with_checksum_naming =
kOptionalChecksumAndDbSessionId;
OpenDBAndBackupEngine(false /* destroy_old_data */, false,
kShareWithChecksum);
FillDB(db_.get(), keys_iteration * j, keys_iteration * (j + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
++j;
options_.file_checksum_gen_factory = GetFileChecksumGenCrc32cFactory();
OpenDBAndBackupEngine(false /* destroy_old_data */, false,
kShareWithChecksum);
FillDB(db_.get(), keys_iteration * j, keys_iteration * (j + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
// Verify first (about to delete)
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * (j + 1));
// For an extra challenge, make sure that GarbageCollect / DeleteBackup
// is OK even if we open without share_table_files
OpenDBAndBackupEngine(false /* destroy_old_data */, false, kNoShare);
backup_engine_->DeleteBackup(1);
backup_engine_->GarbageCollect();
CloseDBAndBackupEngine();
// Verify second (about to delete)
AssertBackupConsistency(2, 0, keys_iteration * 2, keys_iteration * (j + 1));
// Use checksum and file size for backup table file names and open without
// share_table_files
// Again, make sure that GarbageCollect / DeleteBackup is OK
backupable_options_->share_files_with_checksum_naming = kChecksumAndFileSize;
OpenDBAndBackupEngine(false /* destroy_old_data */, false, kNoShare);
backup_engine_->DeleteBackup(2);
backup_engine_->GarbageCollect();
CloseDBAndBackupEngine();
// Verify rest (not deleted)
for (int i = 2; i < j; ++i) {
AssertBackupConsistency(i + 1, 0, keys_iteration * (i + 1),
keys_iteration * (j + 1));
}
}
// This test simulates cleaning up after aborted or incomplete creation
// of a new backup.
TEST_F(BackupableDBTest, DeleteTmpFiles) {
for (int cleanup_fn : {1, 2, 3, 4}) {
for (ShareOption shared_option : kAllShareOptions) {
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
shared_option);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
BackupID next_id = 1;
BackupID oldest_id = std::numeric_limits<BackupID>::max();
{
std::vector<BackupInfo> backup_info;
backup_engine_->GetBackupInfo(&backup_info);
for (const auto& bi : backup_info) {
next_id = std::max(next_id, bi.backup_id + 1);
oldest_id = std::min(oldest_id, bi.backup_id);
}
}
CloseDBAndBackupEngine();
// An aborted or incomplete new backup will always be in the next
// id (maybe more)
std::string next_private = "private/" + std::to_string(next_id);
// NOTE: both shared and shared_checksum should be cleaned up
// regardless of how the backup engine is opened.
std::vector<std::string> tmp_files_and_dirs;
for (const auto& dir_and_file : {
std::make_pair(std::string("shared"),
std::string(".00006.sst.tmp")),
std::make_pair(std::string("shared_checksum"),
std::string(".00007.sst.tmp")),
std::make_pair(next_private, std::string("00003.sst")),
}) {
std::string dir = backupdir_ + "/" + dir_and_file.first;
file_manager_->CreateDir(dir);
ASSERT_OK(file_manager_->FileExists(dir));
std::string file = dir + "/" + dir_and_file.second;
file_manager_->WriteToFile(file, "tmp");
ASSERT_OK(file_manager_->FileExists(file));
tmp_files_and_dirs.push_back(file);
}
if (cleanup_fn != /*CreateNewBackup*/ 4) {
// This exists after CreateNewBackup because it's deleted then
// re-created.
tmp_files_and_dirs.push_back(backupdir_ + "/" + next_private);
}
OpenDBAndBackupEngine(false /* destroy_old_data */, false /* dummy */,
shared_option);
// Need to call one of these explicitly to delete tmp files
switch (cleanup_fn) {
case 1:
ASSERT_OK(backup_engine_->GarbageCollect());
break;
case 2:
ASSERT_OK(backup_engine_->DeleteBackup(oldest_id));
break;
case 3:
ASSERT_OK(backup_engine_->PurgeOldBackups(1));
break;
case 4:
// Does a garbage collect if it sees that next private dir exists
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
break;
default:
assert(false);
}
CloseDBAndBackupEngine();
for (std::string file_or_dir : tmp_files_and_dirs) {
if (file_manager_->FileExists(file_or_dir) != Status::NotFound()) {
FAIL() << file_or_dir << " was expected to be deleted." << cleanup_fn;
}
}
}
}
}
TEST_F(BackupableDBTest, KeepLogFiles) {
backupable_options_->backup_log_files = false;
// basically infinite
options_.WAL_ttl_seconds = 24 * 60 * 60;
OpenDBAndBackupEngine(true);
FillDB(db_.get(), 0, 100, kFlushAll);
FillDB(db_.get(), 100, 200, kFlushAll);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), false));
FillDB(db_.get(), 200, 300, kFlushAll);
FillDB(db_.get(), 300, 400, kFlushAll);
FillDB(db_.get(), 400, 500, kFlushAll);
CloseDBAndBackupEngine();
// all data should be there if we call with keep_log_files = true
AssertBackupConsistency(0, 0, 500, 600, true);
}
class BackupableDBRateLimitingTestWithParam
: public BackupableDBTest,
public testing::WithParamInterface<
std::tuple<bool /* make throttle */,
int /* 0 = single threaded, 1 = multi threaded*/,
std::pair<uint64_t, uint64_t> /* limits */>> {
public:
BackupableDBRateLimitingTestWithParam() {}
};
uint64_t const MB = 1024 * 1024;
INSTANTIATE_TEST_CASE_P(
RateLimiting, BackupableDBRateLimitingTestWithParam,
::testing::Values(std::make_tuple(false, 0, std::make_pair(1 * MB, 5 * MB)),
std::make_tuple(false, 0, std::make_pair(2 * MB, 3 * MB)),
std::make_tuple(false, 1, std::make_pair(1 * MB, 5 * MB)),
std::make_tuple(false, 1, std::make_pair(2 * MB, 3 * MB)),
std::make_tuple(true, 0, std::make_pair(1 * MB, 5 * MB)),
std::make_tuple(true, 0, std::make_pair(2 * MB, 3 * MB)),
std::make_tuple(true, 1, std::make_pair(1 * MB, 5 * MB)),
std::make_tuple(true, 1,
std::make_pair(2 * MB, 3 * MB))));
TEST_P(BackupableDBRateLimitingTestWithParam, RateLimiting) {
size_t const kMicrosPerSec = 1000 * 1000LL;
std::shared_ptr<RateLimiter> backupThrottler(NewGenericRateLimiter(1));
std::shared_ptr<RateLimiter> restoreThrottler(NewGenericRateLimiter(1));
bool makeThrottler = std::get<0>(GetParam());
if (makeThrottler) {
backupable_options_->backup_rate_limiter = backupThrottler;
backupable_options_->restore_rate_limiter = restoreThrottler;
}
// iter 0 -- single threaded
// iter 1 -- multi threaded
int iter = std::get<1>(GetParam());
const std::pair<uint64_t, uint64_t> limit = std::get<2>(GetParam());
// destroy old data
DestroyDB(dbname_, Options());
if (makeThrottler) {
backupThrottler->SetBytesPerSecond(limit.first);
restoreThrottler->SetBytesPerSecond(limit.second);
} else {
backupable_options_->backup_rate_limit = limit.first;
backupable_options_->restore_rate_limit = limit.second;
}
backupable_options_->max_background_operations = (iter == 0) ? 1 : 10;
options_.compression = kNoCompression;
OpenDBAndBackupEngine(true);
size_t bytes_written = FillDB(db_.get(), 0, 100000);
auto start_backup = db_chroot_env_->NowMicros();
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), false));
auto backup_time = db_chroot_env_->NowMicros() - start_backup;
auto rate_limited_backup_time = (bytes_written * kMicrosPerSec) / limit.first;
ASSERT_GT(backup_time, 0.8 * rate_limited_backup_time);
CloseDBAndBackupEngine();
OpenBackupEngine();
auto start_restore = db_chroot_env_->NowMicros();
ASSERT_OK(backup_engine_->RestoreDBFromLatestBackup(dbname_, dbname_));
auto restore_time = db_chroot_env_->NowMicros() - start_restore;
CloseBackupEngine();
auto rate_limited_restore_time =
(bytes_written * kMicrosPerSec) / limit.second;
ASSERT_GT(restore_time, 0.8 * rate_limited_restore_time);
AssertBackupConsistency(0, 0, 100000, 100010);
}
TEST_F(BackupableDBTest, ReadOnlyBackupEngine) {
DestroyDB(dbname_, options_);
OpenDBAndBackupEngine(true);
FillDB(db_.get(), 0, 100);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
FillDB(db_.get(), 100, 200);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
backupable_options_->destroy_old_data = false;
test_backup_env_->ClearWrittenFiles();
test_backup_env_->SetLimitDeleteFiles(0);
BackupEngineReadOnly* read_only_backup_engine;
ASSERT_OK(BackupEngineReadOnly::Open(
db_chroot_env_.get(), *backupable_options_, &read_only_backup_engine));
std::vector<BackupInfo> backup_info;
read_only_backup_engine->GetBackupInfo(&backup_info);
ASSERT_EQ(backup_info.size(), 2U);
RestoreOptions restore_options(false);
ASSERT_OK(read_only_backup_engine->RestoreDBFromLatestBackup(
dbname_, dbname_, restore_options));
delete read_only_backup_engine;
std::vector<std::string> should_have_written;
test_backup_env_->AssertWrittenFiles(should_have_written);
DB* db = OpenDB();
AssertExists(db, 0, 200);
delete db;
}
TEST_F(BackupableDBTest, ProgressCallbackDuringBackup) {
DestroyDB(dbname_, options_);
OpenDBAndBackupEngine(true);
FillDB(db_.get(), 0, 100);
bool is_callback_invoked = false;
ASSERT_OK(backup_engine_->CreateNewBackup(
db_.get(), true,
[&is_callback_invoked]() { is_callback_invoked = true; }));
ASSERT_TRUE(is_callback_invoked);
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
TEST_F(BackupableDBTest, GarbageCollectionBeforeBackup) {
DestroyDB(dbname_, options_);
OpenDBAndBackupEngine(true);
backup_chroot_env_->CreateDirIfMissing(backupdir_ + "/shared");
std::string file_five = backupdir_ + "/shared/000007.sst";
std::string file_five_contents = "I'm not really a sst file";
// this depends on the fact that 00007.sst is the first file created by the DB
ASSERT_OK(file_manager_->WriteToFile(file_five, file_five_contents));
FillDB(db_.get(), 0, 100);
// backup overwrites file 000007.sst
ASSERT_TRUE(backup_engine_->CreateNewBackup(db_.get(), true).ok());
std::string new_file_five_contents;
ASSERT_OK(ReadFileToString(backup_chroot_env_.get(), file_five,
&new_file_five_contents));
// file 000007.sst was overwritten
ASSERT_TRUE(new_file_five_contents != file_five_contents);
CloseDBAndBackupEngine();
AssertBackupConsistency(0, 0, 100);
}
// Test that we properly propagate Env failures
TEST_F(BackupableDBTest, EnvFailures) {
BackupEngine* backup_engine;
// get children failure
{
test_backup_env_->SetGetChildrenFailure(true);
ASSERT_NOK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
test_backup_env_->SetGetChildrenFailure(false);
}
// created dir failure
{
test_backup_env_->SetCreateDirIfMissingFailure(true);
ASSERT_NOK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
test_backup_env_->SetCreateDirIfMissingFailure(false);
}
// new directory failure
{
test_backup_env_->SetNewDirectoryFailure(true);
ASSERT_NOK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
test_backup_env_->SetNewDirectoryFailure(false);
}
// Read from meta-file failure
{
DestroyDB(dbname_, options_);
OpenDBAndBackupEngine(true);
FillDB(db_.get(), 0, 100);
ASSERT_TRUE(backup_engine_->CreateNewBackup(db_.get(), true).ok());
CloseDBAndBackupEngine();
test_backup_env_->SetDummySequentialFile(true);
test_backup_env_->SetDummySequentialFileFailReads(true);
backupable_options_->destroy_old_data = false;
ASSERT_NOK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
test_backup_env_->SetDummySequentialFile(false);
test_backup_env_->SetDummySequentialFileFailReads(false);
}
// no failure
{
ASSERT_OK(BackupEngine::Open(test_db_env_.get(), *backupable_options_,
&backup_engine));
delete backup_engine;
}
}
// Verify manifest can roll while a backup is being created with the old
// manifest.
TEST_F(BackupableDBTest, ChangeManifestDuringBackupCreation) {
DestroyDB(dbname_, options_);
options_.max_manifest_file_size = 0; // always rollover manifest for file add
OpenDBAndBackupEngine(true);
FillDB(db_.get(), 0, 100, kAutoFlushOnly);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"CheckpointImpl::CreateCheckpoint:SavedLiveFiles1",
"VersionSet::LogAndApply:WriteManifest"},
{"VersionSet::LogAndApply:WriteManifestDone",
"CheckpointImpl::CreateCheckpoint:SavedLiveFiles2"},
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ROCKSDB_NAMESPACE::port::Thread flush_thread{
[this]() { ASSERT_OK(db_->Flush(FlushOptions())); }};
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), false));
flush_thread.join();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
// The last manifest roll would've already been cleaned up by the full scan
// that happens when CreateNewBackup invokes EnableFileDeletions. We need to
// trigger another roll to verify non-full scan purges stale manifests.
DBImpl* db_impl = static_cast_with_check<DBImpl>(db_.get());
std::string prev_manifest_path =
DescriptorFileName(dbname_, db_impl->TEST_Current_Manifest_FileNo());
FillDB(db_.get(), 0, 100, kAutoFlushOnly);
ASSERT_OK(db_chroot_env_->FileExists(prev_manifest_path));
ASSERT_OK(db_->Flush(FlushOptions()));
ASSERT_TRUE(db_chroot_env_->FileExists(prev_manifest_path).IsNotFound());
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
AssertBackupConsistency(0, 0, 100);
}
// see https://github.com/facebook/rocksdb/issues/921
TEST_F(BackupableDBTest, Issue921Test) {
BackupEngine* backup_engine;
backupable_options_->share_table_files = false;
backup_chroot_env_->CreateDirIfMissing(backupable_options_->backup_dir);
backupable_options_->backup_dir += "/new_dir";
ASSERT_OK(BackupEngine::Open(backup_chroot_env_.get(), *backupable_options_,
&backup_engine));
delete backup_engine;
}
TEST_F(BackupableDBTest, BackupWithMetadata) {
const int keys_iteration = 5000;
OpenDBAndBackupEngine(true);
// create five backups
for (int i = 0; i < 5; ++i) {
const std::string metadata = std::to_string(i);
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(
backup_engine_->CreateNewBackupWithMetadata(db_.get(), metadata, true));
}
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
std::vector<BackupInfo> backup_infos;
backup_engine_->GetBackupInfo(&backup_infos);
ASSERT_EQ(5, backup_infos.size());
for (int i = 0; i < 5; i++) {
ASSERT_EQ(std::to_string(i), backup_infos[i].app_metadata);
}
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
TEST_F(BackupableDBTest, BinaryMetadata) {
OpenDBAndBackupEngine(true);
std::string binaryMetadata = "abc\ndef";
binaryMetadata.push_back('\0');
binaryMetadata.append("ghi");
ASSERT_OK(
backup_engine_->CreateNewBackupWithMetadata(db_.get(), binaryMetadata));
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
std::vector<BackupInfo> backup_infos;
backup_engine_->GetBackupInfo(&backup_infos);
ASSERT_EQ(1, backup_infos.size());
ASSERT_EQ(binaryMetadata, backup_infos[0].app_metadata);
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
TEST_F(BackupableDBTest, MetadataTooLarge) {
OpenDBAndBackupEngine(true);
std::string largeMetadata(1024 * 1024 + 1, 0);
ASSERT_NOK(
backup_engine_->CreateNewBackupWithMetadata(db_.get(), largeMetadata));
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
TEST_F(BackupableDBTest, LimitBackupsOpened) {
// Verify the specified max backups are opened, including skipping over
// corrupted backups.
//
// Setup:
// - backups 1, 2, and 4 are valid
// - backup 3 is corrupt
// - max_valid_backups_to_open == 2
//
// Expectation: the engine opens backups 4 and 2 since those are latest two
// non-corrupt backups.
const int kNumKeys = 5000;
OpenDBAndBackupEngine(true);
for (int i = 1; i <= 4; ++i) {
FillDB(db_.get(), kNumKeys * i, kNumKeys * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
if (i == 3) {
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/meta/3", 3));
}
}
CloseDBAndBackupEngine();
backupable_options_->max_valid_backups_to_open = 2;
backupable_options_->destroy_old_data = false;
BackupEngineReadOnly* read_only_backup_engine;
ASSERT_OK(BackupEngineReadOnly::Open(backup_chroot_env_.get(),
*backupable_options_,
&read_only_backup_engine));
std::vector<BackupInfo> backup_infos;
read_only_backup_engine->GetBackupInfo(&backup_infos);
ASSERT_EQ(2, backup_infos.size());
ASSERT_EQ(2, backup_infos[0].backup_id);
ASSERT_EQ(4, backup_infos[1].backup_id);
delete read_only_backup_engine;
}
TEST_F(BackupableDBTest, IgnoreLimitBackupsOpenedWhenNotReadOnly) {
// Verify the specified max_valid_backups_to_open is ignored if the engine
// is not read-only.
//
// Setup:
// - backups 1, 2, and 4 are valid
// - backup 3 is corrupt
// - max_valid_backups_to_open == 2
//
// Expectation: the engine opens backups 4, 2, and 1 since those are latest
// non-corrupt backups, by ignoring max_valid_backups_to_open == 2.
const int kNumKeys = 5000;
OpenDBAndBackupEngine(true);
for (int i = 1; i <= 4; ++i) {
FillDB(db_.get(), kNumKeys * i, kNumKeys * (i + 1));
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
if (i == 3) {
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/meta/3", 3));
}
}
CloseDBAndBackupEngine();
backupable_options_->max_valid_backups_to_open = 2;
OpenDBAndBackupEngine();
std::vector<BackupInfo> backup_infos;
backup_engine_->GetBackupInfo(&backup_infos);
ASSERT_EQ(3, backup_infos.size());
ASSERT_EQ(1, backup_infos[0].backup_id);
ASSERT_EQ(2, backup_infos[1].backup_id);
ASSERT_EQ(4, backup_infos[2].backup_id);
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
TEST_F(BackupableDBTest, CreateWhenLatestBackupCorrupted) {
// we should pick an ID greater than corrupted backups' IDs so creation can
// succeed even when latest backup is corrupted.
const int kNumKeys = 5000;
OpenDBAndBackupEngine(true /* destroy_old_data */);
FillDB(db_.get(), 0 /* from */, kNumKeys);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(),
true /* flush_before_backup */));
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/meta/1",
3 /* bytes_to_corrupt */));
CloseDBAndBackupEngine();
OpenDBAndBackupEngine();
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(),
true /* flush_before_backup */));
std::vector<BackupInfo> backup_infos;
backup_engine_->GetBackupInfo(&backup_infos);
ASSERT_EQ(1, backup_infos.size());
ASSERT_EQ(2, backup_infos[0].backup_id);
}
TEST_F(BackupableDBTest, WriteOnlyEngineNoSharedFileDeletion) {
// Verifies a write-only BackupEngine does not delete files belonging to valid
// backups when GarbageCollect, PurgeOldBackups, or DeleteBackup are called.
const int kNumKeys = 5000;
for (int i = 0; i < 3; ++i) {
OpenDBAndBackupEngine(i == 0 /* destroy_old_data */);
FillDB(db_.get(), i * kNumKeys, (i + 1) * kNumKeys);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true));
CloseDBAndBackupEngine();
backupable_options_->max_valid_backups_to_open = 0;
OpenDBAndBackupEngine();
switch (i) {
case 0:
ASSERT_OK(backup_engine_->GarbageCollect());
break;
case 1:
ASSERT_OK(backup_engine_->PurgeOldBackups(1 /* num_backups_to_keep */));
break;
case 2:
ASSERT_OK(backup_engine_->DeleteBackup(2 /* backup_id */));
break;
default:
assert(false);
}
CloseDBAndBackupEngine();
backupable_options_->max_valid_backups_to_open = port::kMaxInt32;
AssertBackupConsistency(i + 1, 0, (i + 1) * kNumKeys);
}
}
TEST_P(BackupableDBTestWithParam, BackupUsingDirectIO) {
// Tests direct I/O on the backup engine's reads and writes on the DB env and
// backup env
// We use ChrootEnv underneath so the below line checks for direct I/O support
// in the chroot directory, not the true filesystem root.
if (!test::IsDirectIOSupported(test_db_env_.get(), "/")) {
return;
}
const int kNumKeysPerBackup = 100;
const int kNumBackups = 3;
options_.use_direct_reads = true;
OpenDBAndBackupEngine(true /* destroy_old_data */);
for (int i = 0; i < kNumBackups; ++i) {
FillDB(db_.get(), i * kNumKeysPerBackup /* from */,
(i + 1) * kNumKeysPerBackup /* to */, kFlushAll);
// Clear the file open counters and then do a bunch of backup engine ops.
// For all ops, files should be opened in direct mode.
test_backup_env_->ClearFileOpenCounters();
test_db_env_->ClearFileOpenCounters();
CloseBackupEngine();
OpenBackupEngine();
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(),
false /* flush_before_backup */));
ASSERT_OK(backup_engine_->VerifyBackup(i + 1));
CloseBackupEngine();
OpenBackupEngine();
std::vector<BackupInfo> backup_infos;
backup_engine_->GetBackupInfo(&backup_infos);
ASSERT_EQ(static_cast<size_t>(i + 1), backup_infos.size());
// Verify backup engine always opened files with direct I/O
ASSERT_EQ(0, test_db_env_->num_writers());
ASSERT_GE(test_db_env_->num_direct_rand_readers(), 0);
ASSERT_GT(test_db_env_->num_direct_seq_readers(), 0);
// Currently the DB doesn't support reading WALs or manifest with direct
// I/O, so subtract two.
ASSERT_EQ(test_db_env_->num_seq_readers() - 2,
test_db_env_->num_direct_seq_readers());
ASSERT_EQ(test_db_env_->num_rand_readers(),
test_db_env_->num_direct_rand_readers());
}
CloseDBAndBackupEngine();
for (int i = 0; i < kNumBackups; ++i) {
AssertBackupConsistency(i + 1 /* backup_id */,
i * kNumKeysPerBackup /* start_exist */,
(i + 1) * kNumKeysPerBackup /* end_exist */,
(i + 2) * kNumKeysPerBackup /* end */);
}
}
TEST_F(BackupableDBTest, BackgroundThreadCpuPriority) {
std::atomic<CpuPriority> priority(CpuPriority::kNormal);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"BackupEngineImpl::Initialize:SetCpuPriority", [&](void* new_priority) {
priority.store(*reinterpret_cast<CpuPriority*>(new_priority));
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// 1 thread is easier to test, otherwise, we may not be sure which thread
// actually does the work during CreateNewBackup.
backupable_options_->max_background_operations = 1;
OpenDBAndBackupEngine(true);
{
FillDB(db_.get(), 0, 100);
// by default, cpu priority is not changed.
CreateBackupOptions options;
ASSERT_OK(backup_engine_->CreateNewBackup(options, db_.get()));
ASSERT_EQ(priority, CpuPriority::kNormal);
}
{
FillDB(db_.get(), 101, 200);
// decrease cpu priority from normal to low.
CreateBackupOptions options;
options.decrease_background_thread_cpu_priority = true;
options.background_thread_cpu_priority = CpuPriority::kLow;
ASSERT_OK(backup_engine_->CreateNewBackup(options, db_.get()));
ASSERT_EQ(priority, CpuPriority::kLow);
}
{
FillDB(db_.get(), 201, 300);
// try to upgrade cpu priority back to normal,
// the priority should still low.
CreateBackupOptions options;
options.decrease_background_thread_cpu_priority = true;
options.background_thread_cpu_priority = CpuPriority::kNormal;
ASSERT_OK(backup_engine_->CreateNewBackup(options, db_.get()));
ASSERT_EQ(priority, CpuPriority::kLow);
}
{
FillDB(db_.get(), 301, 400);
// decrease cpu priority from low to idle.
CreateBackupOptions options;
options.decrease_background_thread_cpu_priority = true;
options.background_thread_cpu_priority = CpuPriority::kIdle;
ASSERT_OK(backup_engine_->CreateNewBackup(options, db_.get()));
ASSERT_EQ(priority, CpuPriority::kIdle);
}
{
FillDB(db_.get(), 301, 400);
// reset priority to later verify that it's not updated by SetCpuPriority.
priority = CpuPriority::kNormal;
// setting the same cpu priority won't call SetCpuPriority.
CreateBackupOptions options;
options.decrease_background_thread_cpu_priority = true;
options.background_thread_cpu_priority = CpuPriority::kIdle;
ASSERT_OK(backup_engine_->CreateNewBackup(options, db_.get()));
ASSERT_EQ(priority, CpuPriority::kNormal);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
CloseDBAndBackupEngine();
DestroyDB(dbname_, options_);
}
} // anon namespace
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <stdio.h>
int main(int /*argc*/, char** /*argv*/) {
fprintf(stderr, "SKIPPED as BackupableDB is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // !defined(ROCKSDB_LITE) && !defined(OS_WIN)
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