fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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620 lines
24 KiB
620 lines
24 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 "table/block_based_table_factory.h"
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <inttypes.h>
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include "options/options_helper.h"
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#include "port/port.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/convenience.h"
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#include "rocksdb/flush_block_policy.h"
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#include "table/block_based_table_builder.h"
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#include "table/block_based_table_reader.h"
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#include "table/format.h"
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#include "util/mutexlock.h"
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#include "util/string_util.h"
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namespace rocksdb {
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void TailPrefetchStats::RecordEffectiveSize(size_t len) {
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MutexLock l(&mutex_);
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if (num_records_ < kNumTracked) {
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num_records_++;
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}
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records_[next_++] = len;
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if (next_ == kNumTracked) {
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next_ = 0;
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}
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}
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size_t TailPrefetchStats::GetSuggestedPrefetchSize() {
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std::vector<size_t> sorted;
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{
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MutexLock l(&mutex_);
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if (num_records_ == 0) {
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return 0;
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}
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sorted.assign(records_, records_ + num_records_);
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}
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// Of the historic size, we find the maximum one that satisifis the condtiion
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// that if prefetching all, less than 1/8 will be wasted.
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std::sort(sorted.begin(), sorted.end());
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// Assuming we have 5 data points, and after sorting it looks like this:
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//
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// +---+
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// +---+ | |
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// | | | |
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// | | | |
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// | | | |
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// | | | |
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// +---+ | | | |
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// | | | | | |
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// +---+ | | | | | |
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// | | | | | | | |
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// +---+ | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// +---+ +---+ +---+ +---+ +---+
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//
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// and we use every of the value as a candidate, and estimate how much we
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// wasted, compared to read. For example, when we use the 3rd record
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// as candiate. This area is what we read:
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// +---+
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// +---+ | |
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// | | | |
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// | | | |
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// | | | |
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// | | | |
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// *** *** *** ***+ *** *** *** *** **
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// * | | | | | |
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// +---+ | | | | | *
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// * | | | | | | | |
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// +---+ | | | | | | | *
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// * | | | | X | | | | |
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// | | | | | | | | | *
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// * | | | | | | | | |
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// | | | | | | | | | *
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// * | | | | | | | | |
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// *** *** ***-*** ***--*** ***--*** +****
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// which is (size of the record) X (number of records).
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//
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// While wasted is this area:
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// +---+
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// +---+ | |
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// | | | |
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// | | | |
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// | | | |
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// | | | |
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// *** *** *** ****---+ | | | |
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// * * | | | | |
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// * *-*** *** | | | | |
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// * * | | | | | | |
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// *--** *** | | | | | | |
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// | | | | | X | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// +---+ +---+ +---+ +---+ +---+
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//
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// Which can be calculated iteratively.
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// The difference between wasted using 4st and 3rd record, will
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// be following area:
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// +---+
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// +--+ +-+ ++ +-+ +-+ +---+ | |
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// + xxxxxxxxxxxxxxxxxxxxxxxx | | | |
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// xxxxxxxxxxxxxxxxxxxxxxxx | | | |
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// + xxxxxxxxxxxxxxxxxxxxxxxx | | | |
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// | xxxxxxxxxxxxxxxxxxxxxxxx | | | |
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// +-+ +-+ +-+ ++ +---+ +--+ | | |
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// | | | | | | |
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// +---+ ++ | | | | | |
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// | | | | | | X | | |
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// +---+ ++ | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// | | | | | | | | | |
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// +---+ +---+ +---+ +---+ +---+
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//
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// which will be the size difference between 4st and 3rd record,
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// times 3, which is number of records before the 4st.
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// Here we assume that all data within the prefetch range will be useful. In
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// reality, it may not be the case when a partial block is inside the range,
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// or there are data in the middle that is not read. We ignore those cases
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// for simplicity.
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assert(!sorted.empty());
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size_t prev_size = sorted[0];
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size_t max_qualified_size = sorted[0];
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size_t wasted = 0;
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for (size_t i = 1; i < sorted.size(); i++) {
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size_t read = sorted[i] * sorted.size();
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wasted += (sorted[i] - prev_size) * i;
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if (wasted <= read / 8) {
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max_qualified_size = sorted[i];
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}
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prev_size = sorted[i];
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}
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const size_t kMaxPrefetchSize = 512 * 1024; // Never exceed 512KB
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return std::min(kMaxPrefetchSize, max_qualified_size);
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}
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BlockBasedTableFactory::BlockBasedTableFactory(
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const BlockBasedTableOptions& _table_options)
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: table_options_(_table_options) {
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if (table_options_.flush_block_policy_factory == nullptr) {
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table_options_.flush_block_policy_factory.reset(
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new FlushBlockBySizePolicyFactory());
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}
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if (table_options_.no_block_cache) {
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table_options_.block_cache.reset();
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} else if (table_options_.block_cache == nullptr) {
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table_options_.block_cache = NewLRUCache(8 << 20);
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}
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if (table_options_.block_size_deviation < 0 ||
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table_options_.block_size_deviation > 100) {
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table_options_.block_size_deviation = 0;
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}
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if (table_options_.block_restart_interval < 1) {
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table_options_.block_restart_interval = 1;
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}
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if (table_options_.index_block_restart_interval < 1) {
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table_options_.index_block_restart_interval = 1;
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}
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if (table_options_.partition_filters &&
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table_options_.index_type !=
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BlockBasedTableOptions::kTwoLevelIndexSearch) {
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// We do not support partitioned filters without partitioning indexes
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table_options_.partition_filters = false;
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}
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}
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Status BlockBasedTableFactory::NewTableReader(
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const TableReaderOptions& table_reader_options,
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std::unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,
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std::unique_ptr<TableReader>* table_reader,
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bool prefetch_index_and_filter_in_cache) const {
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return BlockBasedTable::Open(
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table_reader_options.ioptions, table_reader_options.env_options,
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table_options_, table_reader_options.internal_comparator, std::move(file),
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file_size, table_reader, table_reader_options.prefix_extractor,
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prefetch_index_and_filter_in_cache, table_reader_options.skip_filters,
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table_reader_options.level, table_reader_options.immortal,
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table_reader_options.largest_seqno, &tail_prefetch_stats_);
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}
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TableBuilder* BlockBasedTableFactory::NewTableBuilder(
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const TableBuilderOptions& table_builder_options, uint32_t column_family_id,
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WritableFileWriter* file) const {
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auto table_builder = new BlockBasedTableBuilder(
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table_builder_options.ioptions, table_builder_options.moptions,
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table_options_, table_builder_options.internal_comparator,
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table_builder_options.int_tbl_prop_collector_factories, column_family_id,
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file, table_builder_options.compression_type,
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table_builder_options.compression_opts,
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table_builder_options.compression_dict,
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table_builder_options.skip_filters,
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table_builder_options.column_family_name,
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table_builder_options.creation_time,
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table_builder_options.oldest_key_time);
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return table_builder;
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}
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Status BlockBasedTableFactory::SanitizeOptions(
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const DBOptions& /*db_opts*/, const ColumnFamilyOptions& cf_opts) const {
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if (table_options_.index_type == BlockBasedTableOptions::kHashSearch &&
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cf_opts.prefix_extractor == nullptr) {
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return Status::InvalidArgument(
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"Hash index is specified for block-based "
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"table, but prefix_extractor is not given");
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}
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if (table_options_.cache_index_and_filter_blocks &&
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table_options_.no_block_cache) {
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return Status::InvalidArgument(
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"Enable cache_index_and_filter_blocks, "
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", but block cache is disabled");
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}
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if (table_options_.pin_l0_filter_and_index_blocks_in_cache &&
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table_options_.no_block_cache) {
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return Status::InvalidArgument(
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"Enable pin_l0_filter_and_index_blocks_in_cache, "
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", but block cache is disabled");
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}
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if (!BlockBasedTableSupportedVersion(table_options_.format_version)) {
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return Status::InvalidArgument(
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"Unsupported BlockBasedTable format_version. Please check "
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"include/rocksdb/table.h for more info");
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}
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if (table_options_.block_align && (cf_opts.compression != kNoCompression)) {
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return Status::InvalidArgument(
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"Enable block_align, but compression "
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"enabled");
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}
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if (table_options_.block_align &&
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(table_options_.block_size & (table_options_.block_size - 1))) {
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return Status::InvalidArgument(
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"Block alignment requested but block size is not a power of 2");
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}
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if (table_options_.data_block_index_type ==
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BlockBasedTableOptions::kDataBlockBinaryAndHash &&
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table_options_.data_block_hash_table_util_ratio <= 0) {
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return Status::InvalidArgument(
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"data_block_hash_table_util_ratio should be greater than 0 when "
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"data_block_index_type is set to kDataBlockBinaryAndHash");
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}
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return Status::OK();
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}
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std::string BlockBasedTableFactory::GetPrintableTableOptions() const {
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std::string ret;
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ret.reserve(20000);
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const int kBufferSize = 200;
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char buffer[kBufferSize];
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snprintf(buffer, kBufferSize, " flush_block_policy_factory: %s (%p)\n",
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table_options_.flush_block_policy_factory->Name(),
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static_cast<void*>(table_options_.flush_block_policy_factory.get()));
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " cache_index_and_filter_blocks: %d\n",
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table_options_.cache_index_and_filter_blocks);
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ret.append(buffer);
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snprintf(buffer, kBufferSize,
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" cache_index_and_filter_blocks_with_high_priority: %d\n",
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table_options_.cache_index_and_filter_blocks_with_high_priority);
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ret.append(buffer);
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snprintf(buffer, kBufferSize,
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" pin_l0_filter_and_index_blocks_in_cache: %d\n",
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table_options_.pin_l0_filter_and_index_blocks_in_cache);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " pin_top_level_index_and_filter: %d\n",
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table_options_.pin_top_level_index_and_filter);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " index_type: %d\n",
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table_options_.index_type);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " hash_index_allow_collision: %d\n",
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table_options_.hash_index_allow_collision);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " checksum: %d\n", table_options_.checksum);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " no_block_cache: %d\n",
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table_options_.no_block_cache);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " block_cache: %p\n",
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static_cast<void*>(table_options_.block_cache.get()));
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ret.append(buffer);
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if (table_options_.block_cache) {
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const char* block_cache_name = table_options_.block_cache->Name();
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if (block_cache_name != nullptr) {
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snprintf(buffer, kBufferSize, " block_cache_name: %s\n",
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block_cache_name);
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ret.append(buffer);
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}
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ret.append(" block_cache_options:\n");
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ret.append(table_options_.block_cache->GetPrintableOptions());
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}
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snprintf(buffer, kBufferSize, " block_cache_compressed: %p\n",
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static_cast<void*>(table_options_.block_cache_compressed.get()));
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ret.append(buffer);
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if (table_options_.block_cache_compressed) {
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const char* block_cache_compressed_name =
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table_options_.block_cache_compressed->Name();
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if (block_cache_compressed_name != nullptr) {
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snprintf(buffer, kBufferSize, " block_cache_name: %s\n",
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block_cache_compressed_name);
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ret.append(buffer);
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}
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ret.append(" block_cache_compressed_options:\n");
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ret.append(table_options_.block_cache_compressed->GetPrintableOptions());
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}
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snprintf(buffer, kBufferSize, " persistent_cache: %p\n",
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static_cast<void*>(table_options_.persistent_cache.get()));
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ret.append(buffer);
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if (table_options_.persistent_cache) {
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snprintf(buffer, kBufferSize, " persistent_cache_options:\n");
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ret.append(buffer);
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ret.append(table_options_.persistent_cache->GetPrintableOptions());
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}
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snprintf(buffer, kBufferSize, " block_size: %" ROCKSDB_PRIszt "\n",
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table_options_.block_size);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " block_size_deviation: %d\n",
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table_options_.block_size_deviation);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " block_restart_interval: %d\n",
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table_options_.block_restart_interval);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " index_block_restart_interval: %d\n",
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table_options_.index_block_restart_interval);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " metadata_block_size: %" PRIu64 "\n",
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table_options_.metadata_block_size);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " partition_filters: %d\n",
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table_options_.partition_filters);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " use_delta_encoding: %d\n",
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table_options_.use_delta_encoding);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " filter_policy: %s\n",
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table_options_.filter_policy == nullptr
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? "nullptr"
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: table_options_.filter_policy->Name());
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " whole_key_filtering: %d\n",
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table_options_.whole_key_filtering);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " verify_compression: %d\n",
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table_options_.verify_compression);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " read_amp_bytes_per_bit: %d\n",
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table_options_.read_amp_bytes_per_bit);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " format_version: %d\n",
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table_options_.format_version);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " enable_index_compression: %d\n",
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table_options_.enable_index_compression);
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ret.append(buffer);
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snprintf(buffer, kBufferSize, " block_align: %d\n",
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table_options_.block_align);
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ret.append(buffer);
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return ret;
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}
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#ifndef ROCKSDB_LITE
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namespace {
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bool SerializeSingleBlockBasedTableOption(
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std::string* opt_string, const BlockBasedTableOptions& bbt_options,
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const std::string& name, const std::string& delimiter) {
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auto iter = block_based_table_type_info.find(name);
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if (iter == block_based_table_type_info.end()) {
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return false;
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}
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auto& opt_info = iter->second;
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const char* opt_address =
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reinterpret_cast<const char*>(&bbt_options) + opt_info.offset;
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std::string value;
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bool result = SerializeSingleOptionHelper(opt_address, opt_info.type, &value);
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if (result) {
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*opt_string = name + "=" + value + delimiter;
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}
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return result;
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}
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} // namespace
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Status BlockBasedTableFactory::GetOptionString(
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std::string* opt_string, const std::string& delimiter) const {
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assert(opt_string);
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opt_string->clear();
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for (auto iter = block_based_table_type_info.begin();
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iter != block_based_table_type_info.end(); ++iter) {
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if (iter->second.verification == OptionVerificationType::kDeprecated) {
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// If the option is no longer used in rocksdb and marked as deprecated,
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// we skip it in the serialization.
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continue;
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}
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std::string single_output;
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bool result = SerializeSingleBlockBasedTableOption(
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&single_output, table_options_, iter->first, delimiter);
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assert(result);
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if (result) {
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opt_string->append(single_output);
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}
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}
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return Status::OK();
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}
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#else
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Status BlockBasedTableFactory::GetOptionString(
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std::string* /*opt_string*/, const std::string& /*delimiter*/) const {
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return Status::OK();
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}
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#endif // !ROCKSDB_LITE
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const BlockBasedTableOptions& BlockBasedTableFactory::table_options() const {
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return table_options_;
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}
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#ifndef ROCKSDB_LITE
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namespace {
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std::string ParseBlockBasedTableOption(const std::string& name,
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const std::string& org_value,
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BlockBasedTableOptions* new_options,
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bool input_strings_escaped = false,
|
|
bool ignore_unknown_options = false) {
|
|
const std::string& value =
|
|
input_strings_escaped ? UnescapeOptionString(org_value) : org_value;
|
|
if (!input_strings_escaped) {
|
|
// if the input string is not escaped, it means this function is
|
|
// invoked from SetOptions, which takes the old format.
|
|
if (name == "block_cache" || name == "block_cache_compressed") {
|
|
// cache options can be specified in the following format
|
|
// "block_cache={capacity=1M;num_shard_bits=4;
|
|
// strict_capacity_limit=true;high_pri_pool_ratio=0.5;}"
|
|
// To support backward compatibility, the following format
|
|
// is also supported.
|
|
// "block_cache=1M"
|
|
std::shared_ptr<Cache> cache;
|
|
// block_cache is specified in format block_cache=<cache_size>.
|
|
if (value.find('=') == std::string::npos) {
|
|
cache = NewLRUCache(ParseSizeT(value));
|
|
} else {
|
|
LRUCacheOptions cache_opts;
|
|
if (!ParseOptionHelper(reinterpret_cast<char*>(&cache_opts),
|
|
OptionType::kLRUCacheOptions, value)) {
|
|
return "Invalid cache options";
|
|
}
|
|
cache = NewLRUCache(cache_opts);
|
|
}
|
|
|
|
if (name == "block_cache") {
|
|
new_options->block_cache = cache;
|
|
} else {
|
|
new_options->block_cache_compressed = cache;
|
|
}
|
|
return "";
|
|
} else if (name == "filter_policy") {
|
|
// Expect the following format
|
|
// bloomfilter:int:bool
|
|
const std::string kName = "bloomfilter:";
|
|
if (value.compare(0, kName.size(), kName) != 0) {
|
|
return "Invalid filter policy name";
|
|
}
|
|
size_t pos = value.find(':', kName.size());
|
|
if (pos == std::string::npos) {
|
|
return "Invalid filter policy config, missing bits_per_key";
|
|
}
|
|
int bits_per_key =
|
|
ParseInt(trim(value.substr(kName.size(), pos - kName.size())));
|
|
bool use_block_based_builder =
|
|
ParseBoolean("use_block_based_builder", trim(value.substr(pos + 1)));
|
|
new_options->filter_policy.reset(
|
|
NewBloomFilterPolicy(bits_per_key, use_block_based_builder));
|
|
return "";
|
|
}
|
|
}
|
|
const auto iter = block_based_table_type_info.find(name);
|
|
if (iter == block_based_table_type_info.end()) {
|
|
if (ignore_unknown_options) {
|
|
return "";
|
|
} else {
|
|
return "Unrecognized option";
|
|
}
|
|
}
|
|
const auto& opt_info = iter->second;
|
|
if (opt_info.verification != OptionVerificationType::kDeprecated &&
|
|
!ParseOptionHelper(reinterpret_cast<char*>(new_options) + opt_info.offset,
|
|
opt_info.type, value)) {
|
|
return "Invalid value";
|
|
}
|
|
return "";
|
|
}
|
|
} // namespace
|
|
|
|
Status GetBlockBasedTableOptionsFromString(
|
|
const BlockBasedTableOptions& table_options, const std::string& opts_str,
|
|
BlockBasedTableOptions* new_table_options) {
|
|
std::unordered_map<std::string, std::string> opts_map;
|
|
Status s = StringToMap(opts_str, &opts_map);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
return GetBlockBasedTableOptionsFromMap(table_options, opts_map,
|
|
new_table_options);
|
|
}
|
|
|
|
Status GetBlockBasedTableOptionsFromMap(
|
|
const BlockBasedTableOptions& table_options,
|
|
const std::unordered_map<std::string, std::string>& opts_map,
|
|
BlockBasedTableOptions* new_table_options, bool input_strings_escaped,
|
|
bool ignore_unknown_options) {
|
|
assert(new_table_options);
|
|
*new_table_options = table_options;
|
|
for (const auto& o : opts_map) {
|
|
auto error_message = ParseBlockBasedTableOption(
|
|
o.first, o.second, new_table_options, input_strings_escaped,
|
|
ignore_unknown_options);
|
|
if (error_message != "") {
|
|
const auto iter = block_based_table_type_info.find(o.first);
|
|
if (iter == block_based_table_type_info.end() ||
|
|
!input_strings_escaped || // !input_strings_escaped indicates
|
|
// the old API, where everything is
|
|
// parsable.
|
|
(iter->second.verification != OptionVerificationType::kByName &&
|
|
iter->second.verification !=
|
|
OptionVerificationType::kByNameAllowNull &&
|
|
iter->second.verification !=
|
|
OptionVerificationType::kByNameAllowFromNull &&
|
|
iter->second.verification != OptionVerificationType::kDeprecated)) {
|
|
// Restore "new_options" to the default "base_options".
|
|
*new_table_options = table_options;
|
|
return Status::InvalidArgument("Can't parse BlockBasedTableOptions:",
|
|
o.first + " " + error_message);
|
|
}
|
|
}
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
Status VerifyBlockBasedTableFactory(
|
|
const BlockBasedTableFactory* base_tf,
|
|
const BlockBasedTableFactory* file_tf,
|
|
OptionsSanityCheckLevel sanity_check_level) {
|
|
if ((base_tf != nullptr) != (file_tf != nullptr) &&
|
|
sanity_check_level > kSanityLevelNone) {
|
|
return Status::Corruption(
|
|
"[RocksDBOptionsParser]: Inconsistent TableFactory class type");
|
|
}
|
|
if (base_tf == nullptr) {
|
|
return Status::OK();
|
|
}
|
|
assert(file_tf != nullptr);
|
|
|
|
const auto& base_opt = base_tf->table_options();
|
|
const auto& file_opt = file_tf->table_options();
|
|
|
|
for (auto& pair : block_based_table_type_info) {
|
|
if (pair.second.verification == OptionVerificationType::kDeprecated) {
|
|
// We skip checking deprecated variables as they might
|
|
// contain random values since they might not be initialized
|
|
continue;
|
|
}
|
|
if (BBTOptionSanityCheckLevel(pair.first) <= sanity_check_level) {
|
|
if (!AreEqualOptions(reinterpret_cast<const char*>(&base_opt),
|
|
reinterpret_cast<const char*>(&file_opt),
|
|
pair.second, pair.first, nullptr)) {
|
|
return Status::Corruption(
|
|
"[RocksDBOptionsParser]: "
|
|
"failed the verification on BlockBasedTableOptions::",
|
|
pair.first);
|
|
}
|
|
}
|
|
}
|
|
return Status::OK();
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
TableFactory* NewBlockBasedTableFactory(
|
|
const BlockBasedTableOptions& _table_options) {
|
|
return new BlockBasedTableFactory(_table_options);
|
|
}
|
|
|
|
const std::string BlockBasedTableFactory::kName = "BlockBasedTable";
|
|
const std::string BlockBasedTablePropertyNames::kIndexType =
|
|
"rocksdb.block.based.table.index.type";
|
|
const std::string BlockBasedTablePropertyNames::kWholeKeyFiltering =
|
|
"rocksdb.block.based.table.whole.key.filtering";
|
|
const std::string BlockBasedTablePropertyNames::kPrefixFiltering =
|
|
"rocksdb.block.based.table.prefix.filtering";
|
|
const std::string kHashIndexPrefixesBlock = "rocksdb.hashindex.prefixes";
|
|
const std::string kHashIndexPrefixesMetadataBlock =
|
|
"rocksdb.hashindex.metadata";
|
|
const std::string kPropTrue = "1";
|
|
const std::string kPropFalse = "0";
|
|
|
|
} // namespace rocksdb
|
|
|