mirror of https://github.com/facebook/rocksdb.git
554 lines
22 KiB
C++
554 lines
22 KiB
C++
// 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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#include "table/meta_blocks.h"
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#include <map>
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#include <string>
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#include "block_fetcher.h"
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#include "db/table_properties_collector.h"
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#include "file/random_access_file_reader.h"
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#include "logging/logging.h"
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#include "rocksdb/options.h"
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#include "rocksdb/table.h"
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#include "rocksdb/table_properties.h"
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#include "table/block_based/block.h"
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#include "table/block_based/reader_common.h"
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#include "table/format.h"
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#include "table/internal_iterator.h"
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#include "table/persistent_cache_helper.h"
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#include "table/sst_file_writer_collectors.h"
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#include "table/table_properties_internal.h"
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#include "test_util/sync_point.h"
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#include "util/coding.h"
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namespace ROCKSDB_NAMESPACE {
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const std::string kPropertiesBlockName = "rocksdb.properties";
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// Old property block name for backward compatibility
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const std::string kPropertiesBlockOldName = "rocksdb.stats";
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const std::string kCompressionDictBlockName = "rocksdb.compression_dict";
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const std::string kRangeDelBlockName = "rocksdb.range_del";
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MetaIndexBuilder::MetaIndexBuilder()
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: meta_index_block_(new BlockBuilder(1 /* restart interval */)) {}
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void MetaIndexBuilder::Add(const std::string& key, const BlockHandle& handle) {
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std::string handle_encoding;
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handle.EncodeTo(&handle_encoding);
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meta_block_handles_.insert({key, handle_encoding});
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}
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Slice MetaIndexBuilder::Finish() {
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for (const auto& metablock : meta_block_handles_) {
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meta_index_block_->Add(metablock.first, metablock.second);
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}
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return meta_index_block_->Finish();
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}
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// Property block will be read sequentially and cached in a heap located
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// object, so there's no need for restart points. Thus we set the restart
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// interval to infinity to save space.
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PropertyBlockBuilder::PropertyBlockBuilder()
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: properties_block_(new BlockBuilder(
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std::numeric_limits<int32_t>::max() /* restart interval */)) {}
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void PropertyBlockBuilder::Add(const std::string& name,
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const std::string& val) {
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props_.insert({name, val});
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}
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void PropertyBlockBuilder::Add(const std::string& name, uint64_t val) {
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assert(props_.find(name) == props_.end());
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std::string dst;
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PutVarint64(&dst, val);
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Add(name, dst);
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}
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void PropertyBlockBuilder::Add(
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const UserCollectedProperties& user_collected_properties) {
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for (const auto& prop : user_collected_properties) {
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Add(prop.first, prop.second);
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}
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}
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void PropertyBlockBuilder::AddTableProperty(const TableProperties& props) {
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TEST_SYNC_POINT_CALLBACK("PropertyBlockBuilder::AddTableProperty:Start",
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const_cast<TableProperties*>(&props));
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Add(TablePropertiesNames::kOriginalFileNumber, props.orig_file_number);
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Add(TablePropertiesNames::kRawKeySize, props.raw_key_size);
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Add(TablePropertiesNames::kRawValueSize, props.raw_value_size);
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Add(TablePropertiesNames::kDataSize, props.data_size);
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Add(TablePropertiesNames::kIndexSize, props.index_size);
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if (props.index_partitions != 0) {
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Add(TablePropertiesNames::kIndexPartitions, props.index_partitions);
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Add(TablePropertiesNames::kTopLevelIndexSize, props.top_level_index_size);
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}
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Add(TablePropertiesNames::kIndexKeyIsUserKey, props.index_key_is_user_key);
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Add(TablePropertiesNames::kIndexValueIsDeltaEncoded,
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props.index_value_is_delta_encoded);
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Add(TablePropertiesNames::kNumEntries, props.num_entries);
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Add(TablePropertiesNames::kNumFilterEntries, props.num_filter_entries);
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Add(TablePropertiesNames::kDeletedKeys, props.num_deletions);
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Add(TablePropertiesNames::kMergeOperands, props.num_merge_operands);
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Add(TablePropertiesNames::kNumRangeDeletions, props.num_range_deletions);
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Add(TablePropertiesNames::kNumDataBlocks, props.num_data_blocks);
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Add(TablePropertiesNames::kFilterSize, props.filter_size);
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Add(TablePropertiesNames::kFormatVersion, props.format_version);
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Add(TablePropertiesNames::kFixedKeyLen, props.fixed_key_len);
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Add(TablePropertiesNames::kColumnFamilyId, props.column_family_id);
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Add(TablePropertiesNames::kCreationTime, props.creation_time);
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Add(TablePropertiesNames::kOldestKeyTime, props.oldest_key_time);
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if (props.file_creation_time > 0) {
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Add(TablePropertiesNames::kFileCreationTime, props.file_creation_time);
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}
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if (props.slow_compression_estimated_data_size > 0) {
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Add(TablePropertiesNames::kSlowCompressionEstimatedDataSize,
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props.slow_compression_estimated_data_size);
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}
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if (props.fast_compression_estimated_data_size > 0) {
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Add(TablePropertiesNames::kFastCompressionEstimatedDataSize,
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props.fast_compression_estimated_data_size);
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}
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if (!props.db_id.empty()) {
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Add(TablePropertiesNames::kDbId, props.db_id);
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}
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if (!props.db_session_id.empty()) {
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Add(TablePropertiesNames::kDbSessionId, props.db_session_id);
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}
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if (!props.db_host_id.empty()) {
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Add(TablePropertiesNames::kDbHostId, props.db_host_id);
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}
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if (!props.filter_policy_name.empty()) {
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Add(TablePropertiesNames::kFilterPolicy, props.filter_policy_name);
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}
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if (!props.comparator_name.empty()) {
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Add(TablePropertiesNames::kComparator, props.comparator_name);
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}
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if (!props.merge_operator_name.empty()) {
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Add(TablePropertiesNames::kMergeOperator, props.merge_operator_name);
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}
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if (!props.prefix_extractor_name.empty()) {
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Add(TablePropertiesNames::kPrefixExtractorName,
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props.prefix_extractor_name);
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}
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if (!props.property_collectors_names.empty()) {
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Add(TablePropertiesNames::kPropertyCollectors,
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props.property_collectors_names);
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}
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if (!props.column_family_name.empty()) {
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Add(TablePropertiesNames::kColumnFamilyName, props.column_family_name);
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}
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if (!props.compression_name.empty()) {
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Add(TablePropertiesNames::kCompression, props.compression_name);
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}
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if (!props.compression_options.empty()) {
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Add(TablePropertiesNames::kCompressionOptions, props.compression_options);
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}
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if (!props.seqno_to_time_mapping.empty()) {
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Add(TablePropertiesNames::kSequenceNumberTimeMapping,
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props.seqno_to_time_mapping);
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}
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}
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Slice PropertyBlockBuilder::Finish() {
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for (const auto& prop : props_) {
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properties_block_->Add(prop.first, prop.second);
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}
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return properties_block_->Finish();
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}
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void LogPropertiesCollectionError(Logger* info_log, const std::string& method,
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const std::string& name) {
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assert(method == "Add" || method == "Finish");
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std::string msg =
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"Encountered error when calling TablePropertiesCollector::" + method +
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"() with collector name: " + name;
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ROCKS_LOG_ERROR(info_log, "%s", msg.c_str());
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}
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bool NotifyCollectTableCollectorsOnAdd(
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const Slice& key, const Slice& value, uint64_t file_size,
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const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
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Logger* info_log) {
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bool all_succeeded = true;
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for (auto& collector : collectors) {
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Status s = collector->InternalAdd(key, value, file_size);
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all_succeeded = all_succeeded && s.ok();
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if (!s.ok()) {
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LogPropertiesCollectionError(info_log, "Add" /* method */,
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collector->Name());
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}
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}
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return all_succeeded;
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}
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void NotifyCollectTableCollectorsOnBlockAdd(
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const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
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const uint64_t block_uncomp_bytes,
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const uint64_t block_compressed_bytes_fast,
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const uint64_t block_compressed_bytes_slow) {
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for (auto& collector : collectors) {
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collector->BlockAdd(block_uncomp_bytes, block_compressed_bytes_fast,
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block_compressed_bytes_slow);
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}
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}
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bool NotifyCollectTableCollectorsOnFinish(
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const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
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Logger* info_log, PropertyBlockBuilder* builder) {
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bool all_succeeded = true;
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for (auto& collector : collectors) {
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UserCollectedProperties user_collected_properties;
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Status s = collector->Finish(&user_collected_properties);
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all_succeeded = all_succeeded && s.ok();
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if (!s.ok()) {
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LogPropertiesCollectionError(info_log, "Finish" /* method */,
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collector->Name());
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} else {
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builder->Add(user_collected_properties);
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}
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}
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return all_succeeded;
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}
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// FIXME: should be a parameter for reading table properties to use persistent
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// cache?
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Status ReadTablePropertiesHelper(
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const ReadOptions& ro, const BlockHandle& handle,
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RandomAccessFileReader* file, FilePrefetchBuffer* prefetch_buffer,
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const Footer& footer, const ImmutableOptions& ioptions,
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std::unique_ptr<TableProperties>* table_properties,
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MemoryAllocator* memory_allocator) {
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assert(table_properties);
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// If this is an external SST file ingested with write_global_seqno set to
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// true, then we expect the checksum mismatch because checksum was written
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// by SstFileWriter, but its global seqno in the properties block may have
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// been changed during ingestion. For this reason, we initially read
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// and process without checksum verification, then later try checksum
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// verification so that if it fails, we can copy to a temporary buffer with
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// global seqno set to its original value, i.e. 0, and attempt checksum
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// verification again.
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ReadOptions modified_ro = ro;
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modified_ro.verify_checksums = false;
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BlockContents block_contents;
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BlockFetcher block_fetcher(file, prefetch_buffer, footer, modified_ro, handle,
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&block_contents, ioptions, false /* decompress */,
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false /*maybe_compressed*/, BlockType::kProperties,
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UncompressionDict::GetEmptyDict(),
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PersistentCacheOptions::kEmpty, memory_allocator);
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Status s = block_fetcher.ReadBlockContents();
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if (!s.ok()) {
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return s;
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}
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// Unfortunately, Block::size() might not equal block_contents.data.size(),
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// and Block hides block_contents
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uint64_t block_size = block_contents.data.size();
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Block properties_block(std::move(block_contents));
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std::unique_ptr<MetaBlockIter> iter(properties_block.NewMetaIterator());
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std::unique_ptr<TableProperties> new_table_properties{new TableProperties};
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// All pre-defined properties of type uint64_t
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std::unordered_map<std::string, uint64_t*> predefined_uint64_properties = {
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{TablePropertiesNames::kOriginalFileNumber,
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&new_table_properties->orig_file_number},
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{TablePropertiesNames::kDataSize, &new_table_properties->data_size},
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{TablePropertiesNames::kIndexSize, &new_table_properties->index_size},
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{TablePropertiesNames::kIndexPartitions,
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&new_table_properties->index_partitions},
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{TablePropertiesNames::kTopLevelIndexSize,
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&new_table_properties->top_level_index_size},
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{TablePropertiesNames::kIndexKeyIsUserKey,
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&new_table_properties->index_key_is_user_key},
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{TablePropertiesNames::kIndexValueIsDeltaEncoded,
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&new_table_properties->index_value_is_delta_encoded},
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{TablePropertiesNames::kFilterSize, &new_table_properties->filter_size},
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{TablePropertiesNames::kRawKeySize, &new_table_properties->raw_key_size},
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{TablePropertiesNames::kRawValueSize,
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&new_table_properties->raw_value_size},
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{TablePropertiesNames::kNumDataBlocks,
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&new_table_properties->num_data_blocks},
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{TablePropertiesNames::kNumEntries, &new_table_properties->num_entries},
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{TablePropertiesNames::kNumFilterEntries,
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&new_table_properties->num_filter_entries},
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{TablePropertiesNames::kDeletedKeys,
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&new_table_properties->num_deletions},
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{TablePropertiesNames::kMergeOperands,
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&new_table_properties->num_merge_operands},
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{TablePropertiesNames::kNumRangeDeletions,
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&new_table_properties->num_range_deletions},
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{TablePropertiesNames::kFormatVersion,
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&new_table_properties->format_version},
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{TablePropertiesNames::kFixedKeyLen,
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&new_table_properties->fixed_key_len},
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{TablePropertiesNames::kColumnFamilyId,
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&new_table_properties->column_family_id},
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{TablePropertiesNames::kCreationTime,
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&new_table_properties->creation_time},
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{TablePropertiesNames::kOldestKeyTime,
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&new_table_properties->oldest_key_time},
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{TablePropertiesNames::kFileCreationTime,
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&new_table_properties->file_creation_time},
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{TablePropertiesNames::kSlowCompressionEstimatedDataSize,
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&new_table_properties->slow_compression_estimated_data_size},
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{TablePropertiesNames::kFastCompressionEstimatedDataSize,
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&new_table_properties->fast_compression_estimated_data_size},
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};
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std::string last_key;
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for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
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s = iter->status();
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if (!s.ok()) {
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break;
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}
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auto key = iter->key().ToString();
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// properties block should be strictly sorted with no duplicate key.
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if (!last_key.empty() &&
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BytewiseComparator()->Compare(key, last_key) <= 0) {
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s = Status::Corruption("properties unsorted");
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break;
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}
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last_key = key;
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auto raw_val = iter->value();
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auto pos = predefined_uint64_properties.find(key);
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if (key == ExternalSstFilePropertyNames::kGlobalSeqno) {
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new_table_properties->external_sst_file_global_seqno_offset =
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handle.offset() + iter->ValueOffset();
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}
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if (pos != predefined_uint64_properties.end()) {
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if (key == TablePropertiesNames::kDeletedKeys ||
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key == TablePropertiesNames::kMergeOperands) {
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// Insert in user-collected properties for API backwards compatibility
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new_table_properties->user_collected_properties.insert(
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{key, raw_val.ToString()});
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}
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// handle predefined rocksdb properties
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uint64_t val;
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if (!GetVarint64(&raw_val, &val)) {
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// skip malformed value
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auto error_msg =
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"Detect malformed value in properties meta-block:"
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"\tkey: " +
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key + "\tval: " + raw_val.ToString();
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ROCKS_LOG_ERROR(ioptions.logger, "%s", error_msg.c_str());
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continue;
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}
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*(pos->second) = val;
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} else if (key == TablePropertiesNames::kDbId) {
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new_table_properties->db_id = raw_val.ToString();
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} else if (key == TablePropertiesNames::kDbSessionId) {
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new_table_properties->db_session_id = raw_val.ToString();
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} else if (key == TablePropertiesNames::kDbHostId) {
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new_table_properties->db_host_id = raw_val.ToString();
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} else if (key == TablePropertiesNames::kFilterPolicy) {
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new_table_properties->filter_policy_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kColumnFamilyName) {
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new_table_properties->column_family_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kComparator) {
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new_table_properties->comparator_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kMergeOperator) {
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new_table_properties->merge_operator_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kPrefixExtractorName) {
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new_table_properties->prefix_extractor_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kPropertyCollectors) {
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new_table_properties->property_collectors_names = raw_val.ToString();
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} else if (key == TablePropertiesNames::kCompression) {
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new_table_properties->compression_name = raw_val.ToString();
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} else if (key == TablePropertiesNames::kCompressionOptions) {
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new_table_properties->compression_options = raw_val.ToString();
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} else if (key == TablePropertiesNames::kSequenceNumberTimeMapping) {
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new_table_properties->seqno_to_time_mapping = raw_val.ToString();
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} else {
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// handle user-collected properties
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new_table_properties->user_collected_properties.insert(
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{key, raw_val.ToString()});
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}
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}
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// Modified version of BlockFetcher checksum verification
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// (See write_global_seqno comment above)
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if (s.ok() && footer.GetBlockTrailerSize() > 0) {
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s = VerifyBlockChecksum(footer.checksum_type(), properties_block.data(),
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block_size, file->file_name(), handle.offset());
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if (s.IsCorruption()) {
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if (new_table_properties->external_sst_file_global_seqno_offset != 0) {
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std::string tmp_buf(properties_block.data(),
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block_fetcher.GetBlockSizeWithTrailer());
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uint64_t global_seqno_offset =
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new_table_properties->external_sst_file_global_seqno_offset -
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handle.offset();
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EncodeFixed64(&tmp_buf[static_cast<size_t>(global_seqno_offset)], 0);
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s = VerifyBlockChecksum(footer.checksum_type(), tmp_buf.data(),
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block_size, file->file_name(), handle.offset());
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}
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}
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}
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if (s.ok()) {
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*table_properties = std::move(new_table_properties);
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}
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return s;
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}
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Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
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uint64_t table_magic_number,
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const ImmutableOptions& ioptions,
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std::unique_ptr<TableProperties>* properties,
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MemoryAllocator* memory_allocator,
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FilePrefetchBuffer* prefetch_buffer) {
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BlockHandle block_handle;
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Footer footer;
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Status s = FindMetaBlockInFile(file, file_size, table_magic_number, ioptions,
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kPropertiesBlockName, &block_handle,
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memory_allocator, prefetch_buffer, &footer);
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if (!s.ok()) {
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return s;
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}
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if (!block_handle.IsNull()) {
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s = ReadTablePropertiesHelper(ReadOptions(), block_handle, file,
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prefetch_buffer, footer, ioptions, properties,
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memory_allocator);
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} else {
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s = Status::NotFound();
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}
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return s;
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}
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Status FindOptionalMetaBlock(InternalIterator* meta_index_iter,
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const std::string& meta_block_name,
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BlockHandle* block_handle) {
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assert(block_handle != nullptr);
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meta_index_iter->Seek(meta_block_name);
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if (meta_index_iter->status().ok()) {
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if (meta_index_iter->Valid() && meta_index_iter->key() == meta_block_name) {
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Slice v = meta_index_iter->value();
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return block_handle->DecodeFrom(&v);
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} else if (meta_block_name == kPropertiesBlockName) {
|
|
// Have to try old name for compatibility
|
|
meta_index_iter->Seek(kPropertiesBlockOldName);
|
|
if (meta_index_iter->status().ok() && meta_index_iter->Valid() &&
|
|
meta_index_iter->key() == kPropertiesBlockOldName) {
|
|
Slice v = meta_index_iter->value();
|
|
return block_handle->DecodeFrom(&v);
|
|
}
|
|
}
|
|
}
|
|
// else
|
|
*block_handle = BlockHandle::NullBlockHandle();
|
|
return meta_index_iter->status();
|
|
}
|
|
|
|
Status FindMetaBlock(InternalIterator* meta_index_iter,
|
|
const std::string& meta_block_name,
|
|
BlockHandle* block_handle) {
|
|
Status s =
|
|
FindOptionalMetaBlock(meta_index_iter, meta_block_name, block_handle);
|
|
if (s.ok() && block_handle->IsNull()) {
|
|
return Status::Corruption("Cannot find the meta block", meta_block_name);
|
|
} else {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
Status ReadMetaIndexBlockInFile(RandomAccessFileReader* file,
|
|
uint64_t file_size, uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
BlockContents* metaindex_contents,
|
|
MemoryAllocator* memory_allocator,
|
|
FilePrefetchBuffer* prefetch_buffer,
|
|
Footer* footer_out) {
|
|
Footer footer;
|
|
IOOptions opts;
|
|
auto s = ReadFooterFromFile(opts, file, *ioptions.fs, prefetch_buffer,
|
|
file_size, &footer, table_magic_number);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
if (footer_out) {
|
|
*footer_out = footer;
|
|
}
|
|
|
|
auto metaindex_handle = footer.metaindex_handle();
|
|
return BlockFetcher(file, prefetch_buffer, footer, ReadOptions(),
|
|
metaindex_handle, metaindex_contents, ioptions,
|
|
false /* do decompression */, false /*maybe_compressed*/,
|
|
BlockType::kMetaIndex, UncompressionDict::GetEmptyDict(),
|
|
PersistentCacheOptions::kEmpty, memory_allocator)
|
|
.ReadBlockContents();
|
|
}
|
|
|
|
Status FindMetaBlockInFile(RandomAccessFileReader* file, uint64_t file_size,
|
|
uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
const std::string& meta_block_name,
|
|
BlockHandle* block_handle,
|
|
MemoryAllocator* memory_allocator,
|
|
FilePrefetchBuffer* prefetch_buffer,
|
|
Footer* footer_out) {
|
|
BlockContents metaindex_contents;
|
|
auto s = ReadMetaIndexBlockInFile(
|
|
file, file_size, table_magic_number, ioptions, &metaindex_contents,
|
|
memory_allocator, prefetch_buffer, footer_out);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
// meta blocks are never compressed. Need to add uncompress logic if we are to
|
|
// compress it.
|
|
Block metaindex_block(std::move(metaindex_contents));
|
|
|
|
std::unique_ptr<InternalIterator> meta_iter;
|
|
meta_iter.reset(metaindex_block.NewMetaIterator());
|
|
|
|
return FindMetaBlock(meta_iter.get(), meta_block_name, block_handle);
|
|
}
|
|
|
|
Status ReadMetaBlock(RandomAccessFileReader* file,
|
|
FilePrefetchBuffer* prefetch_buffer, uint64_t file_size,
|
|
uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
const std::string& meta_block_name, BlockType block_type,
|
|
BlockContents* contents,
|
|
MemoryAllocator* memory_allocator) {
|
|
// TableProperties requires special handling because of checksum issues.
|
|
// Call ReadTableProperties instead for that case.
|
|
assert(block_type != BlockType::kProperties);
|
|
|
|
BlockHandle block_handle;
|
|
Footer footer;
|
|
Status status = FindMetaBlockInFile(
|
|
file, file_size, table_magic_number, ioptions, meta_block_name,
|
|
&block_handle, memory_allocator, prefetch_buffer, &footer);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
return BlockFetcher(file, prefetch_buffer, footer, ReadOptions(),
|
|
block_handle, contents, ioptions, false /* decompress */,
|
|
false /*maybe_compressed*/, block_type,
|
|
UncompressionDict::GetEmptyDict(),
|
|
PersistentCacheOptions::kEmpty, memory_allocator)
|
|
.ReadBlockContents();
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|