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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/05/06 05:37:52 UTC

[jira] [Updated] (MAPREDUCE-2632) Avoid calling the partitioner when the numReduceTasks is 1.

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer updated MAPREDUCE-2632:
----------------------------------------
    Labels: BB2015-05-TBR  (was: )

> Avoid calling the partitioner when the numReduceTasks is 1.
> -----------------------------------------------------------
>
>                 Key: MAPREDUCE-2632
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2632
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: tasktracker
>    Affects Versions: 0.23.0
>            Reporter: Ravi Teja Ch N V
>            Assignee: Ravi Teja Ch N V
>              Labels: BB2015-05-TBR
>         Attachments: MAPREDUCE-2632-1.patch, MAPREDUCE-2632.patch
>
>
> We can avoid the call to the partitioner when the number of reducers is 1.This will avoid the unnecessary computations by the partitioner.



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