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rocksdb/utilities/backupable/backupable_db_test.cc

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#if !defined(ROCKSDB_LITE) && !defined(OS_WIN)
#include "rocksdb/utilities/backupable_db.h"
#include <algorithm>
#include <limits>
#include <regex>
#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 {
using ShareFilesNaming = BackupableDBOptions::ShareFilesNaming;
const auto kLegacyCrc32cAndFileSize =
BackupableDBOptions::kLegacyCrc32cAndFileSize;
const auto kUseDbSessionId = BackupableDBOptions::kUseDbSessionId;
const auto kFlagIncludeFileSize = BackupableDBOptions::kFlagIncludeFileSize;
const auto kFlagMatchInterimNaming =
BackupableDBOptions::kFlagMatchInterimNaming;
const auto kNamingDefault =
kUseDbSessionId | kFlagIncludeFileSize | kFlagMatchInterimNaming;
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_) {
uint64_t size_bytes = 200; // Match TestEnv
if (filename.find("MANIFEST") == 0) {
size_bytes = 100; // Match DummyDB::GetLiveFiles
}
r->push_back({dir + filename, 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 = 200; // Match TestEnv
if (fname.find("MANIFEST") == 0) {
*size_bytes = 100; // Match DummyDB::GetLiveFiles
}
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 CorruptFileStart(const std::string& fname) {
std::string to_xor = "blah";
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 (size_t i = 0; i < to_xor.size(); ++i) {
file_contents[i] ^= to_xor[i];
}
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()));
db_file_manager_.reset(new FileManager(db_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 == kWalFile) {
db_chroot_env_->DeleteFile(dbname_ + "/" + f);
}
}
}
Status GetTableFilesInDB(std::vector<FileAttributes>* table_files) {
std::vector<FileAttributes> children;
Status s = test_db_env_->GetChildrenFileAttributes(dbname_, &children);
for (const auto& child : children) {
if (child.size_bytes > 0 && child.name.size() > 4 &&
child.name.rfind(".sst") == child.name.length() - 4) {
table_files->push_back(child);
}
}
return s;
}
Status GetRandomTableFileInDB(std::string* fname_out,
uint64_t* fsize_out = nullptr) {
Random rnd(6); // NB: hardly "random"
std::vector<FileAttributes> table_files;
Status s = GetTableFilesInDB(&table_files);
if (!s.ok()) {
return s;
}
if (table_files.empty()) {
return Status::NotFound("");
}
size_t i = rnd.Uniform(static_cast<int>(table_files.size()));
*fname_out = dbname_ + "/" + table_files[i].name;
if (fsize_out) {
*fsize_out = table_files[i].size_bytes;
}
return Status::OK();
}
Status CorruptRandomTableFileInDB() {
std::string fname;
uint64_t fsize = 0;
Status s = GetRandomTableFileInDB(&fname, &fsize);
if (!s.ok()) {
return s;
}
std::string file_contents;
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);
}
void AssertDirectoryFilesMatchRegex(const std::string& dir,
const std::regex& pattern,
int minimum_count) {
std::vector<FileAttributes> children;
ASSERT_OK(file_manager_->GetChildrenFileAttributes(dir, &children));
int found_count = 0;
for (const auto& child : children) {
if (child.name == "." || child.name == "..") {
continue;
}
const std::string match("match");
ASSERT_EQ(match, std::regex_replace(child.name, pattern, match));
++found_count;
}
ASSERT_GE(found_count, minimum_count);
}
void AssertDirectoryFilesSizeIndicators(const std::string& dir,
int minimum_count) {
std::vector<FileAttributes> children;
ASSERT_OK(file_manager_->GetChildrenFileAttributes(dir, &children));
int found_count = 0;
for (const auto& child : children) {
if (child.name == "." || child.name == "..") {
continue;
}
auto last_underscore = child.name.find_last_of('_');
auto last_dot = child.name.find_last_of('.');
ASSERT_NE(child.name, child.name.substr(0, last_underscore));
ASSERT_NE(child.name, child.name.substr(0, last_dot));
ASSERT_LT(last_underscore, last_dot);
std::string s = child.name.substr(last_underscore + 1,
last_dot - (last_underscore + 1));
ASSERT_EQ(s, ToString(child.size_bytes));
++found_count;
}
ASSERT_GE(found_count, minimum_count);
}
// 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_;
std::unique_ptr<FileManager> db_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, 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 =
kLegacyCrc32cAndFileSize;
// 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);
std::atomic<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);
}
TEST_F(BackupableDBTest, FlushCompactDuringBackupCheckpoint) {
const int keys_iteration = 5000;
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);
// That FillDB leaves a mix of flushed and unflushed data
SyncPoint::GetInstance()->LoadDependency(
{{"CheckpointImpl::CreateCustomCheckpoint:AfterGetLive1",
"BackupableDBTest::FlushCompactDuringBackupCheckpoint:Before"},
{"BackupableDBTest::FlushCompactDuringBackupCheckpoint:After",
"CheckpointImpl::CreateCustomCheckpoint:AfterGetLive2"}});
SyncPoint::GetInstance()->EnableProcessing();
ROCKSDB_NAMESPACE::port::Thread flush_thread{[this]() {
TEST_SYNC_POINT(
"BackupableDBTest::FlushCompactDuringBackupCheckpoint:Before");
FillDB(db_.get(), keys_iteration, 2 * keys_iteration);
ASSERT_OK(db_->Flush(FlushOptions()));
DBImpl* dbi = static_cast<DBImpl*>(db_.get());
dbi->TEST_WaitForFlushMemTable();
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
dbi->TEST_WaitForCompact();
TEST_SYNC_POINT(
"BackupableDBTest::FlushCompactDuringBackupCheckpoint:After");
}};
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
flush_thread.join();
CloseDBAndBackupEngine();
SyncPoint::GetInstance()->DisableProcessing();
SyncPoint::GetInstance()->ClearAllCallBacks();
/* FIXME(peterd): reinstate with option for checksum in file names
if (sopt == kShareWithChecksum) {
// Ensure we actually got DB manifest checksums by inspecting
// shared_checksum file names for hex checksum component
std::regex expected("[^_]+_[0-9A-F]{8}_[^_]+.sst");
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;
}
const std::string match("match");
EXPECT_EQ(match, std::regex_replace(child.name, expected, match));
}
}
*/
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), kFlushAll);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
}
CloseDBAndBackupEngine();
// restore 3
OpenBackupEngine();
ASSERT_OK(backup_engine_->RestoreDBFromBackup(3, dbname_, dbname_));
CloseBackupEngine();
OpenDBAndBackupEngine(false);
// More data, bigger SST
FillDB(db_.get(), 1000, 1300, kFlushAll);
Status s = backup_engine_->CreateNewBackup(db_.get());
// 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 here would have the same name as an
// sst file generated by backup 4, and will be bigger)
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()));
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 various naming options, check names
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNaming) {
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kNamingDefault);
const int keys_iteration = 5000;
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
FillDB(db_.get(), 0, keys_iteration);
CloseDBAndBackupEngine();
static const std::map<ShareFilesNaming, std::string> option_to_expected = {
{kLegacyCrc32cAndFileSize, "[0-9]+_[0-9]+_[0-9]+[.]sst"},
// kFlagIncludeFileSize redundant here
{kLegacyCrc32cAndFileSize | kFlagIncludeFileSize,
"[0-9]+_[0-9]+_[0-9]+[.]sst"},
{kUseDbSessionId, "[0-9]+_s[0-9A-Z]{20}[.]sst"},
{kUseDbSessionId | kFlagIncludeFileSize,
"[0-9]+_s[0-9A-Z]{20}_[0-9]+[.]sst"},
};
for (const auto& pair : option_to_expected) {
// kFlagMatchInterimNaming must not matter on new SST files
for (const auto option :
{pair.first, pair.first | kFlagMatchInterimNaming}) {
CloseAndReopenDB();
backupable_options_->share_files_with_checksum_naming = option;
OpenBackupEngine(true /*destroy_old_data*/);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * 2);
AssertDirectoryFilesMatchRegex(backupdir_ + "/shared_checksum",
std::regex(pair.second),
1 /* minimum_count */);
if (std::string::npos != pair.second.find("_[0-9]+[.]sst")) {
AssertDirectoryFilesSizeIndicators(backupdir_ + "/shared_checksum",
1 /* minimum_count */);
}
}
}
}
// Mimic SST file generated by early internal-only 6.12 release
// and test various naming options. This test can be removed when
// the kFlagMatchInterimNaming feature is removed.
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsInterimNaming) {
const int keys_iteration = 5000;
// Essentially, reinstate old implementaiton of generating a DB
// session id. This is how we distinguish "interim" SST files from
// newer ones: from the form of the db session id string.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::SetDbSessionId", [&](void* sid_void_star) {
std::string* sid = static_cast<std::string*>(sid_void_star);
*sid = test_db_env_->GenerateUniqueId();
if (!sid->empty() && sid->back() == '\n') {
sid->pop_back();
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
FillDB(db_.get(), 0, keys_iteration);
CloseDBAndBackupEngine();
static const std::map<ShareFilesNaming, std::string> option_to_expected = {
{kLegacyCrc32cAndFileSize, "[0-9]+_[0-9]+_[0-9]+[.]sst"},
// kFlagMatchInterimNaming ignored here
{kLegacyCrc32cAndFileSize | kFlagMatchInterimNaming,
"[0-9]+_[0-9]+_[0-9]+[.]sst"},
{kUseDbSessionId, "[0-9]+_s[0-9a-fA-F-]+[.]sst"},
{kUseDbSessionId | kFlagIncludeFileSize,
"[0-9]+_s[0-9a-fA-F-]+_[0-9]+[.]sst"},
{kUseDbSessionId | kFlagMatchInterimNaming, "[0-9]+_[0-9a-fA-F-]+[.]sst"},
{kUseDbSessionId | kFlagIncludeFileSize | kFlagMatchInterimNaming,
"[0-9]+_[0-9a-fA-F-]+[.]sst"},
};
for (const auto& pair : option_to_expected) {
CloseAndReopenDB();
backupable_options_->share_files_with_checksum_naming = pair.first;
OpenBackupEngine(true /*destroy_old_data*/);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * 2);
AssertDirectoryFilesMatchRegex(backupdir_ + "/shared_checksum",
std::regex(pair.second),
1 /* minimum_count */);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
// Mimic SST file generated by pre-6.12 releases and verify that
// old names are always used regardless of naming option.
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsOldFileNaming) {
const int keys_iteration = 5000;
// Pre-6.12 release did not include db id and db session id properties.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"PropertyBlockBuilder::AddTableProperty:Start", [&](void* props_vs) {
auto props = static_cast<TableProperties*>(props_vs);
props->db_id = "";
props->db_session_id = "";
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
OpenDBAndBackupEngine(true, false, kShareWithChecksum);
FillDB(db_.get(), 0, keys_iteration);
CloseDBAndBackupEngine();
// Old names should always be used on old files
const std::regex expected("[0-9]+_[0-9]+_[0-9]+[.]sst");
for (ShareFilesNaming option : {kNamingDefault, kUseDbSessionId}) {
CloseAndReopenDB();
backupable_options_->share_files_with_checksum_naming = option;
OpenBackupEngine(true /*destroy_old_data*/);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
AssertBackupConsistency(1, 0, keys_iteration, keys_iteration * 2);
AssertDirectoryFilesMatchRegex(backupdir_ + "/shared_checksum", expected,
1 /* minimum_count */);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
// Test how naming options interact with detecting DB corruption
// between incremental backups
TEST_F(BackupableDBTest, TableFileCorruptionBeforeIncremental) {
const auto share_no_checksum = static_cast<ShareFilesNaming>(0);
for (bool corrupt_before_first_backup : {false, true}) {
for (ShareFilesNaming option :
{share_no_checksum, kLegacyCrc32cAndFileSize, kNamingDefault}) {
auto share =
option == share_no_checksum ? kShareNoChecksum : kShareWithChecksum;
if (option != share_no_checksum) {
backupable_options_->share_files_with_checksum_naming = option;
}
OpenDBAndBackupEngine(true, false, share);
DBImpl* dbi = static_cast<DBImpl*>(db_.get());
// A small SST file
ASSERT_OK(dbi->Put(WriteOptions(), "x", "y"));
ASSERT_OK(dbi->Flush(FlushOptions()));
// And a bigger one
ASSERT_OK(dbi->Put(WriteOptions(), "y", Random(42).RandomString(500)));
ASSERT_OK(dbi->Flush(FlushOptions()));
dbi->TEST_WaitForFlushMemTable();
CloseDBAndBackupEngine();
std::vector<FileAttributes> table_files;
ASSERT_OK(GetTableFilesInDB(&table_files));
ASSERT_EQ(table_files.size(), 2);
std::string tf0 = dbname_ + "/" + table_files[0].name;
std::string tf1 = dbname_ + "/" + table_files[1].name;
if (corrupt_before_first_backup) {
// This corrupts a data block, which does not cause DB open
// failure, only failure on accessing the block.
ASSERT_OK(db_file_manager_->CorruptFileStart(tf0));
}
OpenDBAndBackupEngine(false, false, share);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
CloseDBAndBackupEngine();
// if corrupt_before_first_backup, this undoes the initial corruption
ASSERT_OK(db_file_manager_->CorruptFileStart(tf0));
OpenDBAndBackupEngine(false, false, share);
Status s = backup_engine_->CreateNewBackup(db_.get());
// Even though none of the naming options catch the inconsistency
// between the first and second time backing up fname, in the case
// of kUseDbSessionId (kNamingDefault), this is an intentional
// trade-off to avoid full scan of files from the DB that are
// already backed up. If we did the scan, kUseDbSessionId could catch
// the corruption. kLegacyCrc32cAndFileSize does the scan (to
// compute checksum for name) without catching the corruption,
// because the corruption means the names don't merge.
EXPECT_OK(s);
// VerifyBackup doesn't check DB integrity or table file internal
// checksums
EXPECT_OK(backup_engine_->VerifyBackup(1, true));
EXPECT_OK(backup_engine_->VerifyBackup(2, true));
db_.reset();
ASSERT_OK(backup_engine_->RestoreDBFromBackup(2, dbname_, dbname_));
{
DB* db = OpenDB();
s = db->VerifyChecksum();
delete db;
}
if (option != kLegacyCrc32cAndFileSize && !corrupt_before_first_backup) {
// Second backup is OK because it used (uncorrupt) file from first
// backup instead of (corrupt) file from DB.
// This is arguably a good trade-off vs. treating the file as distinct
// from the old version, because a file should be more likely to be
// corrupt as it ages. Although the backed-up file might also corrupt
// with age, the alternative approach (checksum in file name computed
// from current DB file contents) wouldn't detect that case at backup
// time either. Although you would have both copies of the file with
// the alternative approach, that would only last until the older
// backup is deleted.
ASSERT_OK(s);
} else if (option == kLegacyCrc32cAndFileSize &&
corrupt_before_first_backup) {
// Second backup is OK because it saved the updated (uncorrupt)
// file from DB, instead of the sharing with first backup.
// Recall: if corrupt_before_first_backup, [second CorruptFileStart]
// undoes the initial corruption.
// This is arguably a bad trade-off vs. sharing the old version of the
// file because a file should be more likely to corrupt as it ages.
// (Not likely that the previously backed-up version was already
// corrupt and the new version is non-corrupt. This approach doesn't
// help if backed-up version is corrupted after taking the backup.)
ASSERT_OK(s);
} else {
// Something is legitimately corrupted, but we can't be sure what
// with information available (TODO? unless one passes block checksum
// test and other doesn't. Probably better to use end-to-end full file
// checksum anyway.)
ASSERT_TRUE(s.IsCorruption());
}
CloseDBAndBackupEngine();
ASSERT_OK(DestroyDB(dbname_, options_));
}
}
}
// Test how naming options interact with detecting file size corruption
// between incremental backups
TEST_F(BackupableDBTest, FileSizeForIncremental) {
const auto share_no_checksum = static_cast<ShareFilesNaming>(0);
for (ShareFilesNaming option : {share_no_checksum, kLegacyCrc32cAndFileSize,
kNamingDefault, kUseDbSessionId}) {
auto share =
option == share_no_checksum ? kShareNoChecksum : kShareWithChecksum;
if (option != share_no_checksum) {
backupable_options_->share_files_with_checksum_naming = option;
}
OpenDBAndBackupEngine(true, false, share);
std::vector<FileAttributes> children;
const std::string shared_dir =
backupdir_ +
(option == share_no_checksum ? "/shared" : "/shared_checksum");
// A single small SST file
ASSERT_OK(db_->Put(WriteOptions(), "x", "y"));
// First, test that we always detect file size corruption on the shared
// backup side on incremental. (Since sizes aren't really part of backup
// meta file, this works by querying the filesystem for the sizes.)
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true /*flush*/));
CloseDBAndBackupEngine();
// Corrupt backup SST
ASSERT_OK(file_manager_->GetChildrenFileAttributes(shared_dir, &children));
ASSERT_EQ(children.size(), 3U); // ".", "..", one sst
for (const auto& child : children) {
if (child.name.size() > 4 && child.size_bytes > 0) {
ASSERT_OK(
file_manager_->WriteToFile(shared_dir + "/" + child.name, "asdf"));
break;
}
}
OpenDBAndBackupEngine(false, false, share);
Status s = backup_engine_->CreateNewBackup(db_.get());
EXPECT_TRUE(s.IsCorruption());
ASSERT_OK(backup_engine_->PurgeOldBackups(0));
CloseDBAndBackupEngine();
// Second, test that a hypothetical db session id collision would likely
// not suffice to corrupt a backup, because there's a good chance of
// file size difference (in this test, guaranteed) so either no name
// collision or detected collision.
// Create backup 1
OpenDBAndBackupEngine(false, false, share);
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get()));
// Even though we have "the same" DB state as backup 1, we need
// to restore to recreate the same conditions as later restore.
db_.reset();
ASSERT_OK(DestroyDB(dbname_, options_));
ASSERT_OK(backup_engine_->RestoreDBFromBackup(1, dbname_, dbname_));
CloseDBAndBackupEngine();
// Forge session id
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::SetDbSessionId", [](void* sid_void_star) {
std::string* sid = static_cast<std::string*>(sid_void_star);
*sid = "01234567890123456789";
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Create another SST file
OpenDBAndBackupEngine(false, false, share);
ASSERT_OK(db_->Put(WriteOptions(), "y", "x"));
// Create backup 2
ASSERT_OK(backup_engine_->CreateNewBackup(db_.get(), true /*flush*/));
// Restore backup 1 (again)
db_.reset();
ASSERT_OK(DestroyDB(dbname_, options_));
ASSERT_OK(backup_engine_->RestoreDBFromBackup(1, dbname_, dbname_));
CloseDBAndBackupEngine();
// Create another SST file with same number and db session id, only bigger
OpenDBAndBackupEngine(false, false, share);
ASSERT_OK(db_->Put(WriteOptions(), "y", Random(42).RandomString(500)));
// Count backup SSTs
children.clear();
ASSERT_OK(file_manager_->GetChildrenFileAttributes(shared_dir, &children));
ASSERT_EQ(children.size(), 4U); // ".", "..", two sst
// Try create backup 3
s = backup_engine_->CreateNewBackup(db_.get(), true /*flush*/);
// Re-count backup SSTs
children.clear();
ASSERT_OK(file_manager_->GetChildrenFileAttributes(shared_dir, &children));
if (option == kUseDbSessionId) {
// Acceptable to call it corruption if size is not in name and
// db session id collision is practically impossible.
EXPECT_TRUE(s.IsCorruption());
EXPECT_EQ(children.size(), 4U); // no SST added
} else if (option == share_no_checksum) {
// Good to call it corruption if both backups cannot be
// accommodated.
EXPECT_TRUE(s.IsCorruption());
EXPECT_EQ(children.size(), 4U); // no SST added
} else {
// Since opening a DB seems sufficient for detecting size corruption
// on the DB side, this should be a good thing, ...
EXPECT_OK(s);
// ... as long as we did actually treat it as a distinct SST file.
EXPECT_EQ(children.size(), 5U); // Another SST added
}
CloseDBAndBackupEngine();
ASSERT_OK(DestroyDB(dbname_, options_));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
}
// 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
// based on kUseDbSessionId
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNamingTransition) {
const int keys_iteration = 5000;
// We may set share_files_with_checksum_naming to kLegacyCrc32cAndFileSize
// 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 ==
kNamingDefault);
// 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 ==
kNamingDefault);
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 based on kUseDbSessionId
ASSERT_TRUE(backupable_options_->share_files_with_checksum_naming ==
kNamingDefault);
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 =
kLegacyCrc32cAndFileSize;
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 kLegacyCrc32cAndFileSize to kUseDbSessionId
TEST_F(BackupableDBTest, ShareTableFilesWithChecksumsNewNamingUpgrade) {
backupable_options_->share_files_with_checksum_naming =
kLegacyCrc32cAndFileSize;
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 = kUseDbSessionId;
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 =
kLegacyCrc32cAndFileSize;
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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