org.rocksdb

类 CompactionOptions

java.lang.Object

org.rocksdb.AbstractNativeReference

org.rocksdb.AbstractImmutableNativeReference

org.rocksdb.RocksObject

org.rocksdb.CompactionOptions

所有已实现的接口:

java.lang.AutoCloseable

public class CompactionOptions
extends RocksObject

CompactionOptions are used in RocksDB.compactFiles(CompactionOptions, ColumnFamilyHandle, List, int, int, CompactionJobInfo) calls.

字段概要

从类继承的字段 org.rocksdb.RocksObject

nativeHandle_

从类继承的字段 org.rocksdb.AbstractImmutableNativeReference

owningHandle_

构造器概要

构造器

构造器和说明
CompactionOptions()

方法概要

限定符和类型	方法和说明
CompressionType	compression() Get the compaction output compression type.
protected void	disposeInternal(long handle)
int	maxSubcompactions() Get the maximum number of threads that will concurrently perform a compaction job.
long	outputFileSizeLimit() Get the compaction output file size limit.
CompactionOptions	setCompression(CompressionType compression) Set the compaction output compression type.
CompactionOptions	setMaxSubcompactions(int maxSubcompactions) This value represents the maximum number of threads that will concurrently perform a compaction job by breaking it into multiple, smaller ones that are run simultaneously.
CompactionOptions	setOutputFileSizeLimit(long outputFileSizeLimit) Compaction will create files of size outputFileSizeLimit().

从类继承的方法 org.rocksdb.RocksObject

disposeInternal, getNativeHandle

从类继承的方法 org.rocksdb.AbstractImmutableNativeReference

close, disOwnNativeHandle, isOwningHandle

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

CompactionOptions

public CompactionOptions()

方法详细资料

compression

public CompressionType compression()

Get the compaction output compression type. See setCompression(CompressionType).

返回:

the compression type.

setCompression

public CompactionOptions setCompression(CompressionType compression)

Set the compaction output compression type. Default: snappy If set to CompressionType.DISABLE_COMPRESSION_OPTION, RocksDB will choose compression type according to the ColumnFamilyOptions.compressionType(), taking into account the output level if ColumnFamilyOptions.compressionPerLevel() is specified.

参数:

compression - the compression type to use for compaction output.

返回:

the instance of the current Options.

outputFileSizeLimit

public long outputFileSizeLimit()

Get the compaction output file size limit. See setOutputFileSizeLimit(long).

返回:

the file size limit.

setOutputFileSizeLimit

public CompactionOptions setOutputFileSizeLimit(long outputFileSizeLimit)

Compaction will create files of size outputFileSizeLimit(). Default: 2^64-1, which means that compaction will create a single file

参数:

outputFileSizeLimit - the size limit

返回:

the instance of the current Options.

maxSubcompactions

public int maxSubcompactions()

Get the maximum number of threads that will concurrently perform a compaction job.

返回:

the maximum number of threads.

setMaxSubcompactions

public CompactionOptions setMaxSubcompactions(int maxSubcompactions)

This value represents the maximum number of threads that will concurrently perform a compaction job by breaking it into multiple, smaller ones that are run simultaneously. Default: 0 (i.e. no subcompactions) If > 0, it will replace the option in DBOptions.maxSubcompactions() for this compaction.

参数:

maxSubcompactions - The maximum number of threads that will concurrently perform a compaction job

返回:

the instance of the current Options.

disposeInternal

protected final void disposeInternal(long handle)

指定者:

disposeInternal 在类中 RocksObject