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

Class RSRawEncoder

java.lang.Object

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

org.apache.hadoop.io.erasurecode.rawcoder.RSRawEncoder

@Private
public class RSRawEncoder
extends RawErasureEncoder

A raw erasure encoder in RS code scheme in pure Java in case native one isn't available in some environment. Please always use native implementations when possible. This new Java coder is about 5X faster than the one originated from HDFS-RAID, and also compatible with the native/ISA-L coder.

Constructor Summary

Constructors

Constructor	Description
RSRawEncoder(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

RSRawEncoder

public RSRawEncoder(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