forked from ngaut/unistore
/
options.go
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/
options.go
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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.
// Copyright 2019-present PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package rocksdb
import "golang.org/x/time/rate"
type CompressionType uint8
const (
CompressionNone CompressionType = 0x0
CompressionSnappy = 0x1
CompressionLz4 = 0x4
CompressionZstd = 0x7
)
func (tp CompressionType) String() string {
switch tp {
case CompressionNone:
return "NoCompression"
case CompressionSnappy:
return "Snappy"
case CompressionLz4:
return "LZ4"
case CompressionZstd:
return "ZSTD"
default:
panic("unknown CompressionType")
}
}
type ChecksumType uint8
const (
ChecksumNone ChecksumType = 0x0
ChecksumCRC32 = 0x1
ChecksumXXHash = 0x2
)
type BlockBasedTableOptions struct {
BlockSize int
BlockSizeDeviation int
BlockRestartInterval int
IndexBlockRestartInterval int
BlockAlign bool
CompressionType CompressionType
ChecksumType ChecksumType
EnableIndexCompression bool
CreationTime uint64
OldestKeyTime uint64
PropsInjectors []PropsInjector
BloomBitsPerKey int
BloomNumProbes int
WholeKeyFiltering bool
PrefixExtractorName string
PrefixExtractor SliceTransform
Comparator Comparator
BufferSize int
BytesPerSync int
RateLimiter *rate.Limiter
}
func NewDefaultBlockBasedTableOptions(cmp Comparator) *BlockBasedTableOptions {
return &BlockBasedTableOptions{
BlockSize: 4 * 1024,
BlockSizeDeviation: 10,
BlockRestartInterval: 16,
IndexBlockRestartInterval: 1,
BlockAlign: false,
CompressionType: CompressionNone,
ChecksumType: ChecksumCRC32,
EnableIndexCompression: true,
CreationTime: 0,
OldestKeyTime: 0,
BloomBitsPerKey: 10,
BloomNumProbes: 6,
WholeKeyFiltering: true,
PrefixExtractorName: "",
PrefixExtractor: nil,
Comparator: cmp,
BufferSize: 1 * 1024 * 1024,
BytesPerSync: 0,
RateLimiter: nil,
}
}