mirror of https://github.com/facebook/rocksdb.git
102 lines
3.3 KiB
C++
102 lines
3.3 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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//
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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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#pragma once
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include "cache/cache_reservation_manager.h"
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#include "port/port.h"
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#include "rocksdb/flush_block_policy.h"
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#include "rocksdb/table.h"
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namespace ROCKSDB_NAMESPACE {
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struct ColumnFamilyOptions;
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struct ConfigOptions;
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struct DBOptions;
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struct EnvOptions;
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class BlockBasedTableBuilder;
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class RandomAccessFileReader;
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class WritableFileWriter;
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// A class used to track actual bytes written from the tail in the recent SST
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// file opens, and provide a suggestion for following open.
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class TailPrefetchStats {
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public:
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void RecordEffectiveSize(size_t len);
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// 0 indicates no information to determine.
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size_t GetSuggestedPrefetchSize();
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private:
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const static size_t kNumTracked = 32;
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size_t records_[kNumTracked];
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port::Mutex mutex_;
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size_t next_ = 0;
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size_t num_records_ = 0;
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};
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class BlockBasedTableFactory : public TableFactory {
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public:
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explicit BlockBasedTableFactory(
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const BlockBasedTableOptions& table_options = BlockBasedTableOptions());
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~BlockBasedTableFactory() {}
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// Method to allow CheckedCast to work for this class
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static const char* kClassName() { return kBlockBasedTableName(); }
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const char* Name() const override { return kBlockBasedTableName(); }
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using TableFactory::NewTableReader;
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Status NewTableReader(
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const ReadOptions& ro, 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 = true) const override;
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TableBuilder* NewTableBuilder(
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const TableBuilderOptions& table_builder_options,
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WritableFileWriter* file) const override;
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// Valdates the specified DB Options.
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Status ValidateOptions(const DBOptions& db_opts,
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const ColumnFamilyOptions& cf_opts) const override;
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Status PrepareOptions(const ConfigOptions& opts) override;
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std::string GetPrintableOptions() const override;
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bool IsDeleteRangeSupported() const override { return true; }
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TailPrefetchStats* tail_prefetch_stats() { return &tail_prefetch_stats_; }
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protected:
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const void* GetOptionsPtr(const std::string& name) const override;
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#ifndef ROCKSDB_LITE
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Status ParseOption(const ConfigOptions& config_options,
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const OptionTypeInfo& opt_info,
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const std::string& opt_name, const std::string& opt_value,
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void* opt_ptr) override;
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#endif
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void InitializeOptions();
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private:
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BlockBasedTableOptions table_options_;
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std::shared_ptr<CacheReservationManager> table_reader_cache_res_mgr_;
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mutable TailPrefetchStats tail_prefetch_stats_;
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};
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extern const std::string kHashIndexPrefixesBlock;
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extern const std::string kHashIndexPrefixesMetadataBlock;
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extern const std::string kPropTrue;
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extern const std::string kPropFalse;
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} // namespace ROCKSDB_NAMESPACE
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