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Posted to mapreduce-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2013/01/09 20:32:13 UTC
[jira] [Commented] (MAPREDUCE-2931) CLONE - LocalJobRunner should
support parallel mapper execution
[ https://issues.apache.org/jira/browse/MAPREDUCE-2931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13548871#comment-13548871 ]
Hadoop QA commented on MAPREDUCE-2931:
--------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12564000/MAPREDUCE-1367-branch1.patch
against trunk revision .
{color:red}-1 patch{color}. The patch command could not apply the patch.
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3219//console
This message is automatically generated.
> CLONE - LocalJobRunner should support parallel mapper execution
> ---------------------------------------------------------------
>
> Key: MAPREDUCE-2931
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2931
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Forest Tan
> Assignee: Sandy Ryza
> Attachments: MAPREDUCE-1367-branch1.patch
>
>
> The LocalJobRunner currently supports only a single execution thread. Given the prevalence of multi-core CPUs, it makes sense to allow users to run multiple tasks in parallel for improved performance on small (local-only) jobs.
> It is necessary to patch back MAPREDUCE-1367 into Hadoop 0.20.X version. Also, MapReduce-434 should be submitted together.
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