3c327ac2d0
Summary: Closes https://github.com/facebook/rocksdb/pull/2589 Differential Revision: D5431502 Pulled By: siying fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// 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
|
|
#ifndef ROCKSDB_LITE
|
|
#include "port/port.h"
|
|
#include "rocksdb/slice_transform.h"
|
|
#include "rocksdb/memtablerep.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class HashCuckooRepFactory : public MemTableRepFactory {
|
|
public:
|
|
// maxinum number of hash functions used in the cuckoo hash.
|
|
static const unsigned int kMaxHashCount = 10;
|
|
|
|
explicit HashCuckooRepFactory(size_t write_buffer_size,
|
|
size_t average_data_size,
|
|
unsigned int hash_function_count)
|
|
: write_buffer_size_(write_buffer_size),
|
|
average_data_size_(average_data_size),
|
|
hash_function_count_(hash_function_count) {}
|
|
|
|
virtual ~HashCuckooRepFactory() {}
|
|
|
|
using MemTableRepFactory::CreateMemTableRep;
|
|
virtual MemTableRep* CreateMemTableRep(
|
|
const MemTableRep::KeyComparator& compare, Allocator* allocator,
|
|
const SliceTransform* transform, Logger* logger) override;
|
|
|
|
virtual const char* Name() const override { return "HashCuckooRepFactory"; }
|
|
|
|
private:
|
|
size_t write_buffer_size_;
|
|
size_t average_data_size_;
|
|
const unsigned int hash_function_count_;
|
|
};
|
|
} // namespace rocksdb
|
|
#endif // ROCKSDB_LITE
|