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Posted to mapreduce-issues@hadoop.apache.org by "Mariappan Asokan (JIRA)" <ji...@apache.org> on 2015/09/01 16:12:49 UTC
[jira] [Commented] (MAPREDUCE-2454) Allow external sorter plugin
for MR
[ https://issues.apache.org/jira/browse/MAPREDUCE-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725451#comment-14725451 ]
Mariappan Asokan commented on MAPREDUCE-2454:
---------------------------------------------
Hi Bharat,
This patch only makes the sort pluggable. It does not result in any performance improvement. There could be other reasons why you may be noticing a performance difference.
-- Asokan
> Allow external sorter plugin for MR
> -----------------------------------
>
> Key: MAPREDUCE-2454
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2454
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Affects Versions: 2.0.0-alpha, 3.0.0, 2.0.2-alpha
> Reporter: Mariappan Asokan
> Assignee: Mariappan Asokan
> Priority: Minor
> Labels: features, performance, plugin, sort
> Fix For: 2.0.3-alpha
>
> Attachments: HadoopSortPlugin.pdf, HadoopSortPlugin.pdf, KeyValueIterator.java, MR-2454-trunkPatchPreview.gz, MapOutputSorter.java, MapOutputSorterAbstract.java, ReduceInputSorter.java, mapreduce-2454-modified-code.patch, mapreduce-2454-modified-test.patch, mapreduce-2454-new-test.patch, mapreduce-2454-protection-change.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, mr-2454-on-mr-279-build82.patch.gz
>
>
> Define interfaces and some abstract classes in the Hadoop framework to facilitate external sorter plugins both on the Map and Reduce sides.
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