Package org.apache.hadoop.io.erasurecode.coder

Class DummyErasureEncoder

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.io.erasurecode.coder.ErasureEncoder

org.apache.hadoop.io.erasurecode.coder.DummyErasureEncoder

All Implemented Interfaces:

Configurable, ErasureCoder

public class DummyErasureEncoder
extends ErasureEncoder

Dummy erasure encoder does no real computation. Instead, it just returns zero bytes. This decoder can be used to isolate the performance issue to HDFS side logic instead of codec, and is intended for test only.

Constructor Summary

Constructors

Constructor	Description
DummyErasureEncoder(ErasureCoderOptions options)

Method Summary

Modifier and Type	Method	Description
protected ErasureCodingStep	prepareEncodingStep(ECBlockGroup blockGroup)	Perform encoding against a block group.

Methods inherited from class org.apache.hadoop.io.erasurecode.coder.ErasureEncoder

calculateCoding, getInputBlocks, getNumDataUnits, getNumParityUnits, getOptions, getOutputBlocks, preferDirectBuffer, release

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

DummyErasureEncoder

public DummyErasureEncoder(ErasureCoderOptions options)

Method Detail

prepareEncodingStep

protected ErasureCodingStep prepareEncodingStep(ECBlockGroup blockGroup)

Description copied from class: ErasureEncoder

Perform encoding against a block group.

Specified by:

prepareEncodingStep in class ErasureEncoder

Parameters:

blockGroup - blockGroup.

Returns:

encoding step for caller to do the real work