org.apache.hadoop.fs.s3a

Class VectoredIOContext

java.lang.Object

org.apache.hadoop.fs.s3a.VectoredIOContext

public final class VectoredIOContext
extends Object

Configuration information for vectored IO.

Constructor Summary

Constructors

Constructor and Description
VectoredIOContext() Default no arg constructor.

Method Summary

Modifier and Type	Method and Description
VectoredIOContext	build() Make immutable.
int	getMaxReadSizeForVectorReads() The largest size that we should group ranges.
int	getMinSeekForVectorReads() What is the threshold at which a seek() to a new location is initiated, rather than merging ranges?
int	getVectoredActiveRangeReads() Maximum number of active range read operation a single input stream can have.
VectoredIOContext	setMaxReadSizeForVectoredReads(int maxSize) What is the largest size that we should group ranges together during vectored read operation?
VectoredIOContext	setMinSeekForVectoredReads(int minSeek) What is the threshold at which a seek() to a new location is initiated, rather than merging ranges? Set to zero to disable range merging entirely.
VectoredIOContext	setVectoredActiveRangeReads(int activeReads) Maximum number of active range read operation a single input stream can have.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

VectoredIOContext

public VectoredIOContext()

Default no arg constructor.

Method Detail

build

public VectoredIOContext build()

Make immutable.

Returns:

this instance.

setMinSeekForVectoredReads

public VectoredIOContext setMinSeekForVectoredReads(int minSeek)

What is the threshold at which a seek() to a new location is initiated, rather than merging ranges? Set to zero to disable range merging entirely.

Parameters:

minSeek - minimum amount of data to skip.

Returns:

this instance.

getMinSeekForVectorReads

public int getMinSeekForVectorReads()

What is the threshold at which a seek() to a new location is initiated, rather than merging ranges?

Returns:

a number greater than or equal to zero.

setMaxReadSizeForVectoredReads

public VectoredIOContext setMaxReadSizeForVectoredReads(int maxSize)

What is the largest size that we should group ranges together during vectored read operation?

Parameters:

maxSize - maximum size

Returns:

this instance.

getMaxReadSizeForVectorReads

public int getMaxReadSizeForVectorReads()

The largest size that we should group ranges. together during vectored read operation

Returns:

a number greater than or equal to zero.

getVectoredActiveRangeReads

public int getVectoredActiveRangeReads()

Maximum number of active range read operation a single input stream can have.

Returns:

number of extra threads for reading, or zero.

setVectoredActiveRangeReads

public VectoredIOContext setVectoredActiveRangeReads(int activeReads)

Maximum number of active range read operation a single input stream can have.

Parameters:

activeReads - number of extra threads for reading, or zero.

Returns:

this instance. number of extra threads for reading, or zero.

toString

public String toString()

Overrides:

toString in class Object