fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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670 lines
21 KiB
670 lines
21 KiB
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "rocksdb/types.h"
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#include "rocksdb/transaction_log.h"
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#include "utilities/utility_db.h"
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#include "utilities/backupable_db.h"
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#include "util/testharness.h"
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#include "util/random.h"
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#include "util/testutil.h"
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#include "util/auto_roll_logger.h"
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#include <string>
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#include <algorithm>
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namespace rocksdb {
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namespace {
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using std::unique_ptr;
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class DummyDB : public StackableDB {
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public:
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/* implicit */
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DummyDB(const Options& options, const std::string& dbname)
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: StackableDB(nullptr), options_(options), dbname_(dbname),
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deletions_enabled_(true), sequence_number_(0) {}
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virtual SequenceNumber GetLatestSequenceNumber() const {
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return ++sequence_number_;
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}
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virtual const std::string& GetName() const override {
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return dbname_;
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}
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virtual Env* GetEnv() const override {
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return options_.env;
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}
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using DB::GetOptions;
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virtual const Options& GetOptions(const ColumnFamilyHandle& column_family)
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const override {
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return options_;
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}
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virtual Status EnableFileDeletions(bool force) override {
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ASSERT_TRUE(!deletions_enabled_);
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deletions_enabled_ = true;
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return Status::OK();
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}
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virtual Status DisableFileDeletions() override {
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ASSERT_TRUE(deletions_enabled_);
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deletions_enabled_ = false;
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return Status::OK();
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}
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virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
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bool flush_memtable = true) override {
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ASSERT_TRUE(!deletions_enabled_);
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vec = live_files_;
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*mfs = 100;
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return Status::OK();
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}
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class DummyLogFile : public LogFile {
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public:
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/* implicit */
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DummyLogFile(const std::string& path, bool alive = true)
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: path_(path), alive_(alive) {}
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virtual std::string PathName() const override {
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return path_;
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}
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virtual uint64_t LogNumber() const {
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// what business do you have calling this method?
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ASSERT_TRUE(false);
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return 0;
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}
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virtual WalFileType Type() const override {
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return alive_ ? kAliveLogFile : kArchivedLogFile;
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}
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virtual SequenceNumber StartSequence() const {
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// backupabledb should not need this method
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ASSERT_TRUE(false);
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return 0;
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}
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virtual uint64_t SizeFileBytes() const {
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// backupabledb should not need this method
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ASSERT_TRUE(false);
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return 0;
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}
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private:
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std::string path_;
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bool alive_;
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}; // DummyLogFile
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virtual Status GetSortedWalFiles(VectorLogPtr& files) override {
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ASSERT_TRUE(!deletions_enabled_);
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files.resize(wal_files_.size());
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for (size_t i = 0; i < files.size(); ++i) {
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files[i].reset(
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new DummyLogFile(wal_files_[i].first, wal_files_[i].second));
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}
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return Status::OK();
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}
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std::vector<std::string> live_files_;
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// pair<filename, alive?>
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std::vector<std::pair<std::string, bool>> wal_files_;
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private:
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Options options_;
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std::string dbname_;
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bool deletions_enabled_;
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mutable SequenceNumber sequence_number_;
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}; // DummyDB
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class TestEnv : public EnvWrapper {
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public:
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explicit TestEnv(Env* t) : EnvWrapper(t) {}
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class DummySequentialFile : public SequentialFile {
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public:
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DummySequentialFile() : SequentialFile(), rnd_(5) {}
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virtual Status Read(size_t n, Slice* result, char* scratch) {
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size_t read_size = (n > size_left) ? size_left : n;
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for (size_t i = 0; i < read_size; ++i) {
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scratch[i] = rnd_.Next() & 255;
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}
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*result = Slice(scratch, read_size);
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size_left -= read_size;
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return Status::OK();
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}
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virtual Status Skip(uint64_t n) {
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size_left = (n > size_left) ? size_left - n : 0;
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return Status::OK();
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}
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private:
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size_t size_left = 200;
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Random rnd_;
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};
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Status NewSequentialFile(const std::string& f,
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unique_ptr<SequentialFile>* r,
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const EnvOptions& options) {
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opened_files_.push_back(f);
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if (dummy_sequential_file_) {
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r->reset(new TestEnv::DummySequentialFile());
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return Status::OK();
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} else {
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return EnvWrapper::NewSequentialFile(f, r, options);
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}
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}
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Status NewWritableFile(const std::string& f, unique_ptr<WritableFile>* r,
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const EnvOptions& options) {
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if (limit_written_files_ <= 0) {
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return Status::IOError("Sorry, can't do this");
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}
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limit_written_files_--;
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return EnvWrapper::NewWritableFile(f, r, options);
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}
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void AssertOpenedFiles(std::vector<std::string>& should_have_opened) {
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sort(should_have_opened.begin(), should_have_opened.end());
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sort(opened_files_.begin(), opened_files_.end());
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ASSERT_TRUE(opened_files_ == should_have_opened);
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}
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void ClearOpenedFiles() {
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opened_files_.clear();
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}
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void SetLimitWrittenFiles(uint64_t limit) {
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limit_written_files_ = limit;
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}
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void SetDummySequentialFile(bool dummy_sequential_file) {
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dummy_sequential_file_ = dummy_sequential_file;
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}
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private:
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bool dummy_sequential_file_ = false;
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std::vector<std::string> opened_files_;
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uint64_t limit_written_files_ = 1000000;
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}; // TestEnv
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class FileManager : public EnvWrapper {
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public:
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explicit FileManager(Env* t) : EnvWrapper(t), rnd_(5) {}
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Status DeleteRandomFileInDir(const std::string dir) {
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std::vector<std::string> children;
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GetChildren(dir, &children);
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if (children.size() <= 2) { // . and ..
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return Status::NotFound("");
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}
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while (true) {
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int i = rnd_.Next() % children.size();
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if (children[i] != "." && children[i] != "..") {
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return DeleteFile(dir + "/" + children[i]);
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}
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}
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// should never get here
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assert(false);
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return Status::NotFound("");
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}
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Status CorruptFile(const std::string& fname, uint64_t bytes_to_corrupt) {
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uint64_t size;
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Status s = GetFileSize(fname, &size);
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if (!s.ok()) {
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return s;
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}
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unique_ptr<RandomRWFile> file;
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EnvOptions env_options;
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env_options.use_mmap_writes = false;
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s = NewRandomRWFile(fname, &file, env_options);
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if (!s.ok()) {
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return s;
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}
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for (uint64_t i = 0; s.ok() && i < bytes_to_corrupt; ++i) {
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std::string tmp;
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// write one random byte to a random position
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s = file->Write(rnd_.Next() % size, test::RandomString(&rnd_, 1, &tmp));
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}
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return s;
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}
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Status WriteToFile(const std::string& fname, const std::string& data) {
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unique_ptr<WritableFile> file;
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EnvOptions env_options;
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env_options.use_mmap_writes = false;
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Status s = EnvWrapper::NewWritableFile(fname, &file, env_options);
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if (!s.ok()) {
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return s;
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}
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return file->Append(Slice(data));
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}
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private:
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Random rnd_;
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}; // FileManager
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// utility functions
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static void FillDB(DB* db, int from, int to) {
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for (int i = from; i < to; ++i) {
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std::string key = "testkey" + std::to_string(i);
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std::string value = "testvalue" + std::to_string(i);
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ASSERT_OK(db->Put(WriteOptions(), Slice(key), Slice(value)));
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}
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}
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static void AssertExists(DB* db, int from, int to) {
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for (int i = from; i < to; ++i) {
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std::string key = "testkey" + std::to_string(i);
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std::string value;
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Status s = db->Get(ReadOptions(), Slice(key), &value);
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ASSERT_EQ(value, "testvalue" + std::to_string(i));
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}
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}
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static void AssertEmpty(DB* db, int from, int to) {
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for (int i = from; i < to; ++i) {
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std::string key = "testkey" + std::to_string(i);
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std::string value = "testvalue" + std::to_string(i);
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Status s = db->Get(ReadOptions(), Slice(key), &value);
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ASSERT_TRUE(s.IsNotFound());
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}
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}
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class BackupableDBTest {
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public:
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BackupableDBTest() {
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// set up files
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dbname_ = test::TmpDir() + "/backupable_db";
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backupdir_ = test::TmpDir() + "/backupable_db_backup";
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// set up envs
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env_ = Env::Default();
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test_db_env_.reset(new TestEnv(env_));
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test_backup_env_.reset(new TestEnv(env_));
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file_manager_.reset(new FileManager(env_));
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// set up db options
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options_.create_if_missing = true;
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options_.paranoid_checks = true;
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options_.write_buffer_size = 1 << 17; // 128KB
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options_.env = test_db_env_.get();
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options_.wal_dir = dbname_;
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// set up backup db options
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CreateLoggerFromOptions(dbname_, backupdir_, env_,
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Options(), &logger_);
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backupable_options_.reset(new BackupableDBOptions(
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backupdir_, test_backup_env_.get(), logger_.get(), true));
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// delete old files in db
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DestroyDB(dbname_, Options());
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}
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DB* OpenDB() {
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DB* db;
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ASSERT_OK(DB::Open(options_, dbname_, &db));
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return db;
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}
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void OpenBackupableDB(bool destroy_old_data = false, bool dummy = false) {
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// reset all the defaults
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test_backup_env_->SetLimitWrittenFiles(1000000);
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test_db_env_->SetLimitWrittenFiles(1000000);
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test_db_env_->SetDummySequentialFile(dummy);
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DB* db;
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if (dummy) {
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dummy_db_ = new DummyDB(options_, dbname_);
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db = dummy_db_;
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} else {
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ASSERT_OK(DB::Open(options_, dbname_, &db));
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}
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backupable_options_->destroy_old_data = destroy_old_data;
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db_.reset(new BackupableDB(db, *backupable_options_));
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}
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void CloseBackupableDB() {
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db_.reset(nullptr);
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}
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void OpenRestoreDB() {
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backupable_options_->destroy_old_data = false;
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restore_db_.reset(
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new RestoreBackupableDB(test_db_env_.get(), *backupable_options_));
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}
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void CloseRestoreDB() {
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restore_db_.reset(nullptr);
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}
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// restores backup backup_id and asserts the existence of
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// [start_exist, end_exist> and not-existence of
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// [end_exist, end>
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//
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// if backup_id == 0, it means restore from latest
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// if end == 0, don't check AssertEmpty
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void AssertBackupConsistency(BackupID backup_id, uint32_t start_exist,
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uint32_t end_exist, uint32_t end = 0) {
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bool opened_restore = false;
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if (restore_db_.get() == nullptr) {
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opened_restore = true;
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OpenRestoreDB();
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}
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if (backup_id > 0) {
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ASSERT_OK(restore_db_->RestoreDBFromBackup(backup_id, dbname_, dbname_));
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} else {
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ASSERT_OK(restore_db_->RestoreDBFromLatestBackup(dbname_, dbname_));
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}
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DB* db = OpenDB();
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AssertExists(db, start_exist, end_exist);
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if (end != 0) {
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AssertEmpty(db, end_exist, end);
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}
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delete db;
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if (opened_restore) {
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CloseRestoreDB();
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}
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}
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// files
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std::string dbname_;
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std::string backupdir_;
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// envs
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Env* env_;
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unique_ptr<TestEnv> test_db_env_;
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unique_ptr<TestEnv> test_backup_env_;
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unique_ptr<FileManager> file_manager_;
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// all the dbs!
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DummyDB* dummy_db_; // BackupableDB owns dummy_db_
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unique_ptr<BackupableDB> db_;
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unique_ptr<RestoreBackupableDB> restore_db_;
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// options
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Options options_;
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unique_ptr<BackupableDBOptions> backupable_options_;
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std::shared_ptr<Logger> logger_;
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}; // BackupableDBTest
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void AppendPath(const std::string& path, std::vector<std::string>& v) {
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for (auto& f : v) {
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f = path + f;
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}
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}
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// this will make sure that backup does not copy the same file twice
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TEST(BackupableDBTest, NoDoubleCopy) {
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OpenBackupableDB(true, true);
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// should write 5 DB files + LATEST_BACKUP + one meta file
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test_backup_env_->SetLimitWrittenFiles(7);
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test_db_env_->ClearOpenedFiles();
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test_db_env_->SetLimitWrittenFiles(0);
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dummy_db_->live_files_ = { "/00010.sst", "/00011.sst",
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"/CURRENT", "/MANIFEST-01" };
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dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
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ASSERT_OK(db_->CreateNewBackup(false));
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std::vector<std::string> should_have_openened = dummy_db_->live_files_;
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should_have_openened.push_back("/00011.log");
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AppendPath(dbname_, should_have_openened);
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test_db_env_->AssertOpenedFiles(should_have_openened);
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// should write 4 new DB files + LATEST_BACKUP + one meta file
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// should not write/copy 00010.sst, since it's already there!
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test_backup_env_->SetLimitWrittenFiles(6);
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test_db_env_->ClearOpenedFiles();
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dummy_db_->live_files_ = { "/00010.sst", "/00015.sst",
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"/CURRENT", "/MANIFEST-01" };
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dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
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ASSERT_OK(db_->CreateNewBackup(false));
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// should not open 00010.sst - it's already there
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should_have_openened = { "/00015.sst", "/CURRENT",
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"/MANIFEST-01", "/00011.log" };
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AppendPath(dbname_, should_have_openened);
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test_db_env_->AssertOpenedFiles(should_have_openened);
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ASSERT_OK(db_->DeleteBackup(1));
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ASSERT_EQ(true,
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test_backup_env_->FileExists(backupdir_ + "/shared/00010.sst"));
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// 00011.sst was only in backup 1, should be deleted
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ASSERT_EQ(false,
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test_backup_env_->FileExists(backupdir_ + "/shared/00011.sst"));
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ASSERT_EQ(true,
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test_backup_env_->FileExists(backupdir_ + "/shared/00015.sst"));
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// MANIFEST file size should be only 100
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uint64_t size;
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test_backup_env_->GetFileSize(backupdir_ + "/private/2/MANIFEST-01", &size);
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ASSERT_EQ(100UL, size);
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test_backup_env_->GetFileSize(backupdir_ + "/shared/00015.sst", &size);
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ASSERT_EQ(200UL, size);
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CloseBackupableDB();
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}
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// test various kind of corruptions that may happen:
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// 1. Not able to write a file for backup - that backup should fail,
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// everything else should work
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// 2. Corrupted/deleted LATEST_BACKUP - everything should work fine
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// 3. Corrupted backup meta file or missing backuped file - we should
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// not be able to open that backup, but all other backups should be
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// fine
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TEST(BackupableDBTest, CorruptionsTest) {
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const int keys_iteration = 5000;
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Random rnd(6);
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Status s;
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OpenBackupableDB(true);
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// create five backups
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for (int i = 0; i < 5; ++i) {
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FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
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ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
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}
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// ---------- case 1. - fail a write -----------
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// try creating backup 6, but fail a write
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FillDB(db_.get(), keys_iteration * 5, keys_iteration * 6);
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test_backup_env_->SetLimitWrittenFiles(2);
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// should fail
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s = db_->CreateNewBackup(!!(rnd.Next() % 2));
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ASSERT_TRUE(!s.ok());
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test_backup_env_->SetLimitWrittenFiles(1000000);
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// latest backup should have all the keys
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CloseBackupableDB();
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AssertBackupConsistency(0, 0, keys_iteration * 5, keys_iteration * 6);
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// ---------- case 2. - corrupt/delete latest backup -----------
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ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/LATEST_BACKUP", 2));
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AssertBackupConsistency(0, 0, keys_iteration * 5);
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ASSERT_OK(file_manager_->DeleteFile(backupdir_ + "/LATEST_BACKUP"));
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AssertBackupConsistency(0, 0, keys_iteration * 5);
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// create backup 6, point LATEST_BACKUP to 5
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OpenBackupableDB();
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FillDB(db_.get(), keys_iteration * 5, keys_iteration * 6);
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ASSERT_OK(db_->CreateNewBackup(false));
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CloseBackupableDB();
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ASSERT_OK(file_manager_->WriteToFile(backupdir_ + "/LATEST_BACKUP", "5"));
|
|
AssertBackupConsistency(0, 0, keys_iteration * 5, keys_iteration * 6);
|
|
// assert that all 6 data is gone!
|
|
ASSERT_TRUE(file_manager_->FileExists(backupdir_ + "/meta/6") == false);
|
|
ASSERT_TRUE(file_manager_->FileExists(backupdir_ + "/private/6") == false);
|
|
|
|
// --------- case 3. 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);
|
|
OpenRestoreDB();
|
|
s = restore_db_->RestoreDBFromBackup(5, dbname_, dbname_);
|
|
ASSERT_TRUE(!s.ok());
|
|
CloseRestoreDB();
|
|
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);
|
|
OpenRestoreDB();
|
|
s = restore_db_->RestoreDBFromBackup(4, dbname_, dbname_);
|
|
CloseRestoreDB();
|
|
ASSERT_TRUE(!s.ok());
|
|
|
|
// new backup should be 4!
|
|
OpenBackupableDB();
|
|
FillDB(db_.get(), keys_iteration * 3, keys_iteration * 4);
|
|
ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
|
|
CloseBackupableDB();
|
|
AssertBackupConsistency(4, 0, keys_iteration * 4, keys_iteration * 5);
|
|
}
|
|
|
|
// open DB, write, close DB, backup, restore, repeat
|
|
TEST(BackupableDBTest, 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 ----
|
|
OpenBackupableDB(destroy_data);
|
|
destroy_data = false;
|
|
FillDB(db_.get(), keys_iteration * i, fill_up_to);
|
|
ASSERT_OK(db_->CreateNewBackup(iter == 0));
|
|
CloseBackupableDB();
|
|
DestroyDB(dbname_, Options());
|
|
|
|
// ---- make sure it's empty ----
|
|
DB* db = OpenDB();
|
|
AssertEmpty(db, 0, fill_up_to);
|
|
delete db;
|
|
|
|
// ---- restore the DB ----
|
|
OpenRestoreDB();
|
|
if (i >= 3) { // test purge old backups
|
|
// when i == 4, purge to only 1 backup
|
|
// when i == 3, purge to 2 backups
|
|
ASSERT_OK(restore_db_->PurgeOldBackups(5 - i));
|
|
}
|
|
// ---- make sure the data is there ---
|
|
AssertBackupConsistency(0, 0, fill_up_to, max_key);
|
|
CloseRestoreDB();
|
|
}
|
|
}
|
|
}
|
|
|
|
// open DB, write, backup, write, backup, close, restore
|
|
TEST(BackupableDBTest, 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());
|
|
|
|
OpenBackupableDB(true);
|
|
// write some data, backup, repeat
|
|
for (int i = 0; i < 5; ++i) {
|
|
if (i == 4) {
|
|
// delete backup number 2, online delete!
|
|
OpenRestoreDB();
|
|
ASSERT_OK(restore_db_->DeleteBackup(2));
|
|
CloseRestoreDB();
|
|
}
|
|
// 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);
|
|
FillDB(db_.get(), keys_iteration * i, fill_up_to);
|
|
// we should get consistent results with flush_before_backup
|
|
// set to both true and false
|
|
ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
|
|
}
|
|
// close and destroy
|
|
CloseBackupableDB();
|
|
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 ----
|
|
OpenRestoreDB();
|
|
for (int i = 1; i <= 5; ++i) {
|
|
if (i == 2) {
|
|
// we deleted backup 2
|
|
Status s = restore_db_->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(restore_db_->DeleteBackup(4));
|
|
ASSERT_OK(restore_db_->PurgeOldBackups(2));
|
|
|
|
std::vector<BackupInfo> backup_info;
|
|
restore_db_->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);
|
|
|
|
CloseRestoreDB();
|
|
}
|
|
|
|
TEST(BackupableDBTest, DeleteNewerBackups) {
|
|
// create backups 1, 2, 3, 4, 5
|
|
OpenBackupableDB(true);
|
|
for (int i = 0; i < 5; ++i) {
|
|
FillDB(db_.get(), 100 * i, 100 * (i + 1));
|
|
ASSERT_OK(db_->CreateNewBackup(!!(i % 2)));
|
|
}
|
|
CloseBackupableDB();
|
|
|
|
// backup 3 is fine
|
|
AssertBackupConsistency(3, 0, 300, 500);
|
|
// this should delete backups 4 and 5
|
|
OpenBackupableDB();
|
|
CloseBackupableDB();
|
|
// backups 4 and 5 don't exist
|
|
OpenRestoreDB();
|
|
Status s = restore_db_->RestoreDBFromBackup(4, dbname_, dbname_);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
s = restore_db_->RestoreDBFromBackup(5, dbname_, dbname_);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
CloseRestoreDB();
|
|
}
|
|
|
|
} // anon namespace
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
return rocksdb::test::RunAllTests();
|
|
}
|
|
|