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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3226) Run combiner when merging spills from map output
Date Tue, 29 Apr 2008 20:58:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12593112#action_12593112
] 

Owen O'Malley commented on HADOOP-3226:
---------------------------------------

I think we should get rid of the spill versus merge combiner input/output record counters.
I think it would just confuse users over the distinction between them.

> Run combiner when merging spills from map output
> ------------------------------------------------
>
>                 Key: HADOOP-3226
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3226
>             Project: Hadoop Core
>          Issue Type: Improvement
>            Reporter: Chris Douglas
>            Assignee: Chris Douglas
>             Fix For: 0.18.0
>
>         Attachments: 3226-0.patch, 3226-1.patch, 3226-2.patch
>
>
> When merging spills from the map, running the combiner should further diminish the volume
of data we send to the reduce.

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