fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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587 lines
20 KiB
587 lines
20 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root 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 "db/version_edit_handler.h"
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#include "monitoring/persistent_stats_history.h"
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namespace ROCKSDB_NAMESPACE {
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VersionEditHandler::VersionEditHandler(
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bool read_only, const std::vector<ColumnFamilyDescriptor>& column_families,
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VersionSet* version_set, bool track_missing_files,
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bool no_error_if_table_files_missing)
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: read_only_(read_only),
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column_families_(column_families),
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status_(),
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version_set_(version_set),
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track_missing_files_(track_missing_files),
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no_error_if_table_files_missing_(no_error_if_table_files_missing),
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initialized_(false) {
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assert(version_set_ != nullptr);
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}
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Status VersionEditHandler::Iterate(log::Reader& reader, std::string* db_id) {
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Slice record;
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std::string scratch;
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size_t recovered_edits = 0;
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Status s = Initialize();
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while (reader.ReadRecord(&record, &scratch) && s.ok()) {
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VersionEdit edit;
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s = edit.DecodeFrom(record);
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if (!s.ok()) {
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break;
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}
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if (edit.has_db_id_) {
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version_set_->db_id_ = edit.GetDbId();
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if (db_id != nullptr) {
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*db_id = version_set_->db_id_;
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}
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}
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s = read_buffer_.AddEdit(&edit);
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if (!s.ok()) {
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break;
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}
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ColumnFamilyData* cfd = nullptr;
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if (edit.is_in_atomic_group_) {
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if (read_buffer_.IsFull()) {
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for (auto& e : read_buffer_.replay_buffer()) {
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s = ApplyVersionEdit(e, &cfd);
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if (!s.ok()) {
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break;
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}
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++recovered_edits;
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}
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if (!s.ok()) {
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break;
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}
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read_buffer_.Clear();
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}
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} else {
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s = ApplyVersionEdit(edit, &cfd);
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if (s.ok()) {
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++recovered_edits;
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}
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}
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}
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CheckIterationResult(reader, &s);
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if (!s.ok()) {
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status_ = s;
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}
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return s;
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}
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Status VersionEditHandler::Initialize() {
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Status s;
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if (!initialized_) {
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for (const auto& cf_desc : column_families_) {
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name_to_options_.emplace(cf_desc.name, cf_desc.options);
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}
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auto default_cf_iter = name_to_options_.find(kDefaultColumnFamilyName);
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if (default_cf_iter == name_to_options_.end()) {
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s = Status::InvalidArgument("Default column family not specified");
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}
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if (s.ok()) {
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VersionEdit default_cf_edit;
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default_cf_edit.AddColumnFamily(kDefaultColumnFamilyName);
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default_cf_edit.SetColumnFamily(0);
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ColumnFamilyData* cfd =
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CreateCfAndInit(default_cf_iter->second, default_cf_edit);
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assert(cfd != nullptr);
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#ifdef NDEBUG
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(void)cfd;
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#endif
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initialized_ = true;
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}
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}
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return s;
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}
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Status VersionEditHandler::ApplyVersionEdit(VersionEdit& edit,
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ColumnFamilyData** cfd) {
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Status s;
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if (edit.is_column_family_add_) {
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s = OnColumnFamilyAdd(edit, cfd);
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} else if (edit.is_column_family_drop_) {
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s = OnColumnFamilyDrop(edit, cfd);
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} else {
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s = OnNonCfOperation(edit, cfd);
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}
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if (s.ok()) {
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assert(cfd != nullptr);
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s = ExtractInfoFromVersionEdit(*cfd, edit);
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}
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return s;
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}
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Status VersionEditHandler::OnColumnFamilyAdd(VersionEdit& edit,
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ColumnFamilyData** cfd) {
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bool cf_in_not_found = false;
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bool cf_in_builders = false;
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CheckColumnFamilyId(edit, &cf_in_not_found, &cf_in_builders);
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assert(cfd != nullptr);
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*cfd = nullptr;
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Status s;
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if (cf_in_builders || cf_in_not_found) {
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s = Status::Corruption("MANIFEST adding the same column family twice: " +
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edit.column_family_name_);
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}
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if (s.ok()) {
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auto cf_options = name_to_options_.find(edit.column_family_name_);
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// implicitly add persistent_stats column family without requiring user
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// to specify
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ColumnFamilyData* tmp_cfd = nullptr;
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bool is_persistent_stats_column_family =
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edit.column_family_name_.compare(kPersistentStatsColumnFamilyName) == 0;
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if (cf_options == name_to_options_.end() &&
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!is_persistent_stats_column_family) {
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column_families_not_found_.emplace(edit.column_family_,
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edit.column_family_name_);
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} else {
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if (is_persistent_stats_column_family) {
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ColumnFamilyOptions cfo;
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OptimizeForPersistentStats(&cfo);
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tmp_cfd = CreateCfAndInit(cfo, edit);
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} else {
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tmp_cfd = CreateCfAndInit(cf_options->second, edit);
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}
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*cfd = tmp_cfd;
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}
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}
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return s;
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}
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Status VersionEditHandler::OnColumnFamilyDrop(VersionEdit& edit,
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ColumnFamilyData** cfd) {
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bool cf_in_not_found = false;
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bool cf_in_builders = false;
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CheckColumnFamilyId(edit, &cf_in_not_found, &cf_in_builders);
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assert(cfd != nullptr);
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*cfd = nullptr;
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ColumnFamilyData* tmp_cfd = nullptr;
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Status s;
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if (cf_in_builders) {
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tmp_cfd = DestroyCfAndCleanup(edit);
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} else if (cf_in_not_found) {
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column_families_not_found_.erase(edit.column_family_);
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} else {
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s = Status::Corruption("MANIFEST - dropping non-existing column family");
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}
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*cfd = tmp_cfd;
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return s;
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}
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Status VersionEditHandler::OnNonCfOperation(VersionEdit& edit,
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ColumnFamilyData** cfd) {
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bool cf_in_not_found = false;
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bool cf_in_builders = false;
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CheckColumnFamilyId(edit, &cf_in_not_found, &cf_in_builders);
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assert(cfd != nullptr);
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*cfd = nullptr;
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Status s;
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if (!cf_in_not_found) {
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if (!cf_in_builders) {
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s = Status::Corruption(
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"MANIFEST record referencing unknown column family");
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}
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ColumnFamilyData* tmp_cfd = nullptr;
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if (s.ok()) {
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auto builder_iter = builders_.find(edit.column_family_);
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assert(builder_iter != builders_.end());
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tmp_cfd = version_set_->GetColumnFamilySet()->GetColumnFamily(
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edit.column_family_);
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assert(tmp_cfd != nullptr);
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s = MaybeCreateVersion(edit, tmp_cfd, /*force_create_version=*/false);
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if (s.ok()) {
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s = builder_iter->second->version_builder()->Apply(&edit);
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}
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}
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*cfd = tmp_cfd;
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}
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return s;
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}
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// TODO maybe cache the computation result
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bool VersionEditHandler::HasMissingFiles() const {
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bool ret = false;
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for (const auto& elem : cf_to_missing_files_) {
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const auto& missing_files = elem.second;
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if (!missing_files.empty()) {
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ret = true;
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break;
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}
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}
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return ret;
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}
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void VersionEditHandler::CheckColumnFamilyId(const VersionEdit& edit,
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bool* cf_in_not_found,
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bool* cf_in_builders) const {
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assert(cf_in_not_found != nullptr);
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assert(cf_in_builders != nullptr);
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// Not found means that user didn't supply that column
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// family option AND we encountered column family add
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// record. Once we encounter column family drop record,
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// we will delete the column family from
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// column_families_not_found.
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bool in_not_found = column_families_not_found_.find(edit.column_family_) !=
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column_families_not_found_.end();
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// in builders means that user supplied that column family
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// option AND that we encountered column family add record
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bool in_builders = builders_.find(edit.column_family_) != builders_.end();
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// They cannot both be true
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assert(!(in_not_found && in_builders));
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*cf_in_not_found = in_not_found;
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*cf_in_builders = in_builders;
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}
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void VersionEditHandler::CheckIterationResult(const log::Reader& reader,
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Status* s) {
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assert(s != nullptr);
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if (!s->ok()) {
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read_buffer_.Clear();
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} else if (!version_edit_params_.has_log_number_ ||
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!version_edit_params_.has_next_file_number_ ||
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!version_edit_params_.has_last_sequence_) {
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std::string msg("no ");
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if (!version_edit_params_.has_log_number_) {
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msg.append("log_file_number, ");
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}
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if (!version_edit_params_.has_next_file_number_) {
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msg.append("next_file_number, ");
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}
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if (!version_edit_params_.has_last_sequence_) {
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msg.append("last_sequence, ");
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}
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msg = msg.substr(0, msg.size() - 2);
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msg.append(" entry in MANIFEST");
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*s = Status::Corruption(msg);
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}
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if (s->ok() && !read_only_ && !column_families_not_found_.empty()) {
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std::string msg;
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for (const auto& cf : column_families_not_found_) {
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msg.append(", ");
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msg.append(cf.second);
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}
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msg = msg.substr(2);
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*s = Status::InvalidArgument("Column families not opened: " + msg);
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}
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if (s->ok()) {
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version_set_->GetColumnFamilySet()->UpdateMaxColumnFamily(
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version_edit_params_.max_column_family_);
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version_set_->MarkMinLogNumberToKeep2PC(
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version_edit_params_.min_log_number_to_keep_);
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version_set_->MarkFileNumberUsed(version_edit_params_.prev_log_number_);
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version_set_->MarkFileNumberUsed(version_edit_params_.log_number_);
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for (auto* cfd : *(version_set_->GetColumnFamilySet())) {
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auto builder_iter = builders_.find(cfd->GetID());
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assert(builder_iter != builders_.end());
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auto* builder = builder_iter->second->version_builder();
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if (!builder->CheckConsistencyForNumLevels()) {
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*s = Status::InvalidArgument(
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"db has more levels than options.num_levels");
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break;
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}
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}
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}
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if (s->ok()) {
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for (auto* cfd : *(version_set_->GetColumnFamilySet())) {
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if (cfd->IsDropped()) {
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continue;
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}
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if (read_only_) {
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cfd->table_cache()->SetTablesAreImmortal();
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}
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*s = LoadTables(cfd, /*prefetch_index_and_filter_in_cache=*/false,
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/*is_initial_load=*/true);
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if (!s->ok()) {
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break;
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}
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}
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}
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if (s->ok()) {
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for (auto* cfd : *(version_set_->column_family_set_)) {
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if (cfd->IsDropped()) {
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continue;
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}
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assert(cfd->initialized());
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VersionEdit edit;
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*s = MaybeCreateVersion(edit, cfd, /*force_create_version=*/true);
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if (!s->ok()) {
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break;
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}
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}
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}
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if (s->ok()) {
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version_set_->manifest_file_size_ = reader.GetReadOffset();
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assert(version_set_->manifest_file_size_ > 0);
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version_set_->next_file_number_.store(
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version_edit_params_.next_file_number_ + 1);
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version_set_->last_allocated_sequence_ =
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version_edit_params_.last_sequence_;
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version_set_->last_published_sequence_ =
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version_edit_params_.last_sequence_;
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version_set_->last_sequence_ = version_edit_params_.last_sequence_;
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version_set_->prev_log_number_ = version_edit_params_.prev_log_number_;
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}
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}
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ColumnFamilyData* VersionEditHandler::CreateCfAndInit(
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const ColumnFamilyOptions& cf_options, const VersionEdit& edit) {
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ColumnFamilyData* cfd = version_set_->CreateColumnFamily(cf_options, &edit);
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assert(cfd != nullptr);
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cfd->set_initialized();
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assert(builders_.find(edit.column_family_) == builders_.end());
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builders_.emplace(edit.column_family_,
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VersionBuilderUPtr(new BaseReferencedVersionBuilder(cfd)));
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if (track_missing_files_) {
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cf_to_missing_files_.emplace(edit.column_family_,
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std::unordered_set<uint64_t>());
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}
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return cfd;
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}
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ColumnFamilyData* VersionEditHandler::DestroyCfAndCleanup(
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const VersionEdit& edit) {
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auto builder_iter = builders_.find(edit.column_family_);
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assert(builder_iter != builders_.end());
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builders_.erase(builder_iter);
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if (track_missing_files_) {
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auto missing_files_iter = cf_to_missing_files_.find(edit.column_family_);
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assert(missing_files_iter != cf_to_missing_files_.end());
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cf_to_missing_files_.erase(missing_files_iter);
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}
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ColumnFamilyData* ret =
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version_set_->GetColumnFamilySet()->GetColumnFamily(edit.column_family_);
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assert(ret != nullptr);
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if (ret->UnrefAndTryDelete()) {
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ret = nullptr;
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} else {
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assert(false);
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}
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return ret;
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}
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Status VersionEditHandler::MaybeCreateVersion(const VersionEdit& /*edit*/,
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ColumnFamilyData* cfd,
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bool force_create_version) {
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assert(cfd->initialized());
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Status s;
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if (force_create_version) {
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auto builder_iter = builders_.find(cfd->GetID());
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assert(builder_iter != builders_.end());
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auto* builder = builder_iter->second->version_builder();
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auto* v = new Version(cfd, version_set_, version_set_->file_options_,
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*cfd->GetLatestMutableCFOptions(),
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version_set_->current_version_number_++);
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s = builder->SaveTo(v->storage_info());
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if (s.ok()) {
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// Install new version
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v->PrepareApply(
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*cfd->GetLatestMutableCFOptions(),
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!(version_set_->db_options_->skip_stats_update_on_db_open));
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version_set_->AppendVersion(cfd, v);
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} else {
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delete v;
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}
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}
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return s;
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}
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Status VersionEditHandler::LoadTables(ColumnFamilyData* cfd,
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bool prefetch_index_and_filter_in_cache,
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bool is_initial_load) {
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assert(cfd != nullptr);
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assert(!cfd->IsDropped());
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Status s;
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auto builder_iter = builders_.find(cfd->GetID());
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assert(builder_iter != builders_.end());
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assert(builder_iter->second != nullptr);
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VersionBuilder* builder = builder_iter->second->version_builder();
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assert(builder);
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s = builder->LoadTableHandlers(
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cfd->internal_stats(),
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version_set_->db_options_->max_file_opening_threads,
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prefetch_index_and_filter_in_cache, is_initial_load,
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cfd->GetLatestMutableCFOptions()->prefix_extractor.get());
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if ((s.IsPathNotFound() || s.IsCorruption()) &&
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no_error_if_table_files_missing_) {
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s = Status::OK();
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}
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if (!s.ok() && !version_set_->db_options_->paranoid_checks) {
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s = Status::OK();
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}
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return s;
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}
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Status VersionEditHandler::ExtractInfoFromVersionEdit(ColumnFamilyData* cfd,
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const VersionEdit& edit) {
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Status s;
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if (cfd != nullptr) {
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if (edit.has_db_id_) {
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version_edit_params_.SetDBId(edit.db_id_);
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}
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if (edit.has_log_number_) {
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if (cfd->GetLogNumber() > edit.log_number_) {
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ROCKS_LOG_WARN(
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version_set_->db_options()->info_log,
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"MANIFEST corruption detected, but ignored - Log numbers in "
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"records NOT monotonically increasing");
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} else {
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cfd->SetLogNumber(edit.log_number_);
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version_edit_params_.SetLogNumber(edit.log_number_);
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}
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}
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if (edit.has_comparator_ &&
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edit.comparator_ != cfd->user_comparator()->Name()) {
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s = Status::InvalidArgument(
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cfd->user_comparator()->Name(),
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"does not match existing comparator " + edit.comparator_);
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}
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}
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if (s.ok()) {
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if (edit.has_prev_log_number_) {
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version_edit_params_.SetPrevLogNumber(edit.prev_log_number_);
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}
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if (edit.has_next_file_number_) {
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version_edit_params_.SetNextFile(edit.next_file_number_);
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}
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if (edit.has_max_column_family_) {
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version_edit_params_.SetMaxColumnFamily(edit.max_column_family_);
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}
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if (edit.has_min_log_number_to_keep_) {
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version_edit_params_.min_log_number_to_keep_ =
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std::max(version_edit_params_.min_log_number_to_keep_,
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edit.min_log_number_to_keep_);
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}
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if (edit.has_last_sequence_) {
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version_edit_params_.SetLastSequence(edit.last_sequence_);
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}
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if (!version_edit_params_.has_prev_log_number_) {
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version_edit_params_.SetPrevLogNumber(0);
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}
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}
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return s;
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}
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VersionEditHandlerPointInTime::VersionEditHandlerPointInTime(
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bool read_only, const std::vector<ColumnFamilyDescriptor>& column_families,
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VersionSet* version_set)
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: VersionEditHandler(read_only, column_families, version_set,
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/*track_missing_files=*/true,
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/*no_error_if_table_files_missing=*/true) {}
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VersionEditHandlerPointInTime::~VersionEditHandlerPointInTime() {
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for (const auto& elem : versions_) {
|
|
delete elem.second;
|
|
}
|
|
versions_.clear();
|
|
}
|
|
|
|
void VersionEditHandlerPointInTime::CheckIterationResult(
|
|
const log::Reader& reader, Status* s) {
|
|
VersionEditHandler::CheckIterationResult(reader, s);
|
|
assert(s != nullptr);
|
|
if (s->ok()) {
|
|
for (auto* cfd : *(version_set_->column_family_set_)) {
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
assert(cfd->initialized());
|
|
auto v_iter = versions_.find(cfd->GetID());
|
|
if (v_iter != versions_.end()) {
|
|
assert(v_iter->second != nullptr);
|
|
|
|
version_set_->AppendVersion(cfd, v_iter->second);
|
|
versions_.erase(v_iter);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ColumnFamilyData* VersionEditHandlerPointInTime::DestroyCfAndCleanup(
|
|
const VersionEdit& edit) {
|
|
ColumnFamilyData* cfd = VersionEditHandler::DestroyCfAndCleanup(edit);
|
|
auto v_iter = versions_.find(edit.column_family_);
|
|
if (v_iter != versions_.end()) {
|
|
delete v_iter->second;
|
|
versions_.erase(v_iter);
|
|
}
|
|
return cfd;
|
|
}
|
|
|
|
Status VersionEditHandlerPointInTime::MaybeCreateVersion(
|
|
const VersionEdit& edit, ColumnFamilyData* cfd, bool force_create_version) {
|
|
assert(cfd != nullptr);
|
|
if (!force_create_version) {
|
|
assert(edit.column_family_ == cfd->GetID());
|
|
}
|
|
auto missing_files_iter = cf_to_missing_files_.find(cfd->GetID());
|
|
assert(missing_files_iter != cf_to_missing_files_.end());
|
|
std::unordered_set<uint64_t>& missing_files = missing_files_iter->second;
|
|
const bool prev_has_missing_files = !missing_files.empty();
|
|
for (const auto& file : edit.GetDeletedFiles()) {
|
|
uint64_t file_num = file.second;
|
|
auto fiter = missing_files.find(file_num);
|
|
if (fiter != missing_files.end()) {
|
|
missing_files.erase(fiter);
|
|
}
|
|
}
|
|
Status s;
|
|
for (const auto& elem : edit.GetNewFiles()) {
|
|
const FileMetaData& meta = elem.second;
|
|
const FileDescriptor& fd = meta.fd;
|
|
uint64_t file_num = fd.GetNumber();
|
|
const std::string fpath =
|
|
MakeTableFileName(cfd->ioptions()->cf_paths[0].path, file_num);
|
|
s = version_set_->VerifyFileMetadata(fpath, meta);
|
|
if (s.IsPathNotFound() || s.IsNotFound() || s.IsCorruption()) {
|
|
missing_files.insert(file_num);
|
|
s = Status::OK();
|
|
}
|
|
}
|
|
bool missing_info = !version_edit_params_.has_log_number_ ||
|
|
!version_edit_params_.has_next_file_number_ ||
|
|
!version_edit_params_.has_last_sequence_;
|
|
|
|
// Create version before apply edit
|
|
if (!missing_info && ((!missing_files.empty() && !prev_has_missing_files) ||
|
|
(missing_files.empty() && force_create_version))) {
|
|
auto builder_iter = builders_.find(cfd->GetID());
|
|
assert(builder_iter != builders_.end());
|
|
auto* builder = builder_iter->second->version_builder();
|
|
auto* version = new Version(cfd, version_set_, version_set_->file_options_,
|
|
*cfd->GetLatestMutableCFOptions(),
|
|
version_set_->current_version_number_++);
|
|
s = builder->SaveTo(version->storage_info());
|
|
if (s.ok()) {
|
|
version->PrepareApply(
|
|
*cfd->GetLatestMutableCFOptions(),
|
|
!version_set_->db_options_->skip_stats_update_on_db_open);
|
|
auto v_iter = versions_.find(cfd->GetID());
|
|
if (v_iter != versions_.end()) {
|
|
delete v_iter->second;
|
|
v_iter->second = version;
|
|
} else {
|
|
versions_.emplace(cfd->GetID(), version);
|
|
}
|
|
} else {
|
|
delete version;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|