Package org.apache.hadoop.io.erasurecode.rawcoder

Class XORRawEncoder

java.lang.Object

org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder

org.apache.hadoop.io.erasurecode.rawcoder.XORRawEncoder

@Private
public class XORRawEncoder
extends RawErasureEncoder

A raw encoder in XOR code scheme in pure Java, adapted from HDFS-RAID. XOR code is an important primitive code scheme in erasure coding and often used in advanced codes, like HitchHiker and LRC, though itself is rarely deployed independently.

Constructor Summary

Constructors

Constructor	Description
XORRawEncoder(ErasureCoderOptions coderOptions)

Method Summary

Modifier and Type	Method	Description
protected void	doEncode(org.apache.hadoop.io.erasurecode.rawcoder.ByteArrayEncodingState encodingState)	Perform the real encoding work using bytes array, supporting offsets and lengths.
protected void	doEncode(org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferEncodingState encodingState)	Perform the real encoding work using direct ByteBuffer.

Methods inherited from class org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder

allowChangeInputs, allowVerboseDump, encode, encode, encode, getNumAllUnits, getNumDataUnits, getNumParityUnits, preferDirectBuffer, release

Methods inherited from class java.lang.Object

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

Constructor Details

XORRawEncoder

public XORRawEncoder(ErasureCoderOptions coderOptions)

Method Details

doEncode

protected void doEncode(org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferEncodingState encodingState)

Description copied from class: RawErasureEncoder

Perform the real encoding work using direct ByteBuffer.

Specified by:

doEncode in class RawErasureEncoder

Parameters:

encodingState - the encoding state.

doEncode

protected void doEncode(org.apache.hadoop.io.erasurecode.rawcoder.ByteArrayEncodingState encodingState)

Description copied from class: RawErasureEncoder

Perform the real encoding work using bytes array, supporting offsets and lengths.

Specified by:

doEncode in class RawErasureEncoder

Parameters:

encodingState - the encoding state