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From "Johan Oskarson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-76) Implement speculative re-execution of reduces
Date Fri, 07 Jul 2006 15:36:31 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-76?page=comments#action_12419731 ] 

Johan Oskarson commented on HADOOP-76:
--------------------------------------

As one should've suspected there seems to be a problem with the patch.
It doesn't clean up after the tasks properly, but I do not currently have the time to look
at this.
Still, feedback is welcome or if someone wants to use any of it in their own patch, go ahead.


> Implement speculative re-execution of reduces
> ---------------------------------------------
>
>          Key: HADOOP-76
>          URL: http://issues.apache.org/jira/browse/HADOOP-76
>      Project: Hadoop
>         Type: Improvement

>   Components: mapred
>     Versions: 0.1.0
>     Reporter: Doug Cutting
>     Assignee: Owen O'Malley
>     Priority: Minor
>      Fix For: 0.5.0
>  Attachments: spec_reducev.patch
>
> As a first step, reduce task outputs should go to temporary files which are renamed when
the task completes.

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