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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#include <stdint.h>
#include <memory>
#include <string>
#include "cache/cache_reservation_manager.h"
#include "port/port.h"
#include "rocksdb/flush_block_policy.h"
#include "rocksdb/table.h"
namespace ROCKSDB_NAMESPACE {
struct ColumnFamilyOptions;
struct ConfigOptions;
struct DBOptions;
struct EnvOptions;
class BlockBasedTableBuilder;
class RandomAccessFileReader;
class WritableFileWriter;
// A class used to track actual bytes written from the tail in the recent SST
// file opens, and provide a suggestion for following open.
class TailPrefetchStats {
public:
void RecordEffectiveSize(size_t len);
// 0 indicates no information to determine.
size_t GetSuggestedPrefetchSize();
private:
const static size_t kNumTracked = 32;
size_t records_[kNumTracked];
port::Mutex mutex_;
size_t next_ = 0;
size_t num_records_ = 0;
};
class BlockBasedTableFactory : public TableFactory {
public:
explicit BlockBasedTableFactory(
const BlockBasedTableOptions& table_options = BlockBasedTableOptions());
~BlockBasedTableFactory() {}
// Method to allow CheckedCast to work for this class
static const char* kClassName() { return kBlockBasedTableName(); }
const char* Name() const override { return kBlockBasedTableName(); }
using TableFactory::NewTableReader;
Status NewTableReader(
const ReadOptions& ro, const TableReaderOptions& table_reader_options,
std::unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,
std::unique_ptr<TableReader>* table_reader,
bool prefetch_index_and_filter_in_cache = true) const override;
TableBuilder* NewTableBuilder(
const TableBuilderOptions& table_builder_options,
WritableFileWriter* file) const override;
// Valdates the specified DB Options.
Status ValidateOptions(const DBOptions& db_opts,
const ColumnFamilyOptions& cf_opts) const override;
Status PrepareOptions(const ConfigOptions& opts) override;
std::string GetPrintableOptions() const override;
bool IsDeleteRangeSupported() const override { return true; }
TailPrefetchStats* tail_prefetch_stats() { return &tail_prefetch_stats_; }
protected:
const void* GetOptionsPtr(const std::string& name) const override;
#ifndef ROCKSDB_LITE
Status ParseOption(const ConfigOptions& config_options,
const OptionTypeInfo& opt_info,
const std::string& opt_name, const std::string& opt_value,
void* opt_ptr) override;
#endif
void InitializeOptions();
private:
BlockBasedTableOptions table_options_;
std::shared_ptr<CacheReservationManager> table_reader_cache_res_mgr_;
mutable TailPrefetchStats tail_prefetch_stats_;
};
extern const std::string kHashIndexPrefixesBlock;
extern const std::string kHashIndexPrefixesMetadataBlock;
extern const std::string kPropTrue;
extern const std::string kPropFalse;
} // namespace ROCKSDB_NAMESPACE
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