a14b7873ee
Summary: Introduces a new class for managing write buffer memory across column families. We supplement ColumnFamilyOptions::write_buffer_size with ColumnFamilyOptions::write_buffer, a shared pointer to a WriteBuffer instance that enforces memory limits before flushing out to disk. Test Plan: Added SharedWriteBuffer unit test to db_test.cc Reviewers: sdong, rven, ljin, igor Reviewed By: igor Subscribers: tnovak, yhchiang, dhruba, xjin, MarkCallaghan, yoshinorim Differential Revision: https://reviews.facebook.net/D22581
43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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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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#ifndef ROCKSDB_LITE
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#pragma once
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#include "rocksdb/slice_transform.h"
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#include "rocksdb/memtablerep.h"
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namespace rocksdb {
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class HashCuckooRepFactory : public MemTableRepFactory {
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public:
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// maxinum number of hash functions used in the cuckoo hash.
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static const unsigned int kMaxHashCount = 10;
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explicit HashCuckooRepFactory(size_t write_buffer_size,
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size_t average_data_size,
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unsigned int hash_function_count)
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: write_buffer_size_(write_buffer_size),
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average_data_size_(average_data_size),
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hash_function_count_(hash_function_count) {}
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virtual ~HashCuckooRepFactory() {}
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virtual MemTableRep* CreateMemTableRep(
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const MemTableRep::KeyComparator& compare, MemTableAllocator* allocator,
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const SliceTransform* transform, Logger* logger) override;
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virtual const char* Name() const override { return "HashCuckooRepFactory"; }
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private:
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size_t write_buffer_size_;
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size_t average_data_size_;
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const unsigned int hash_function_count_;
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};
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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