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Posted to mapreduce-issues@hadoop.apache.org by "Tsuyoshi OZAWA (JIRA)" <ji...@apache.org> on 2012/12/11 09:19:21 UTC

[jira] [Updated] (MAPREDUCE-4865) Launching node-level combiner at the end stage of MapTask

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsuyoshi OZAWA updated MAPREDUCE-4865:
--------------------------------------

    Summary: Launching node-level combiner at the end stage of MapTask  (was: Launching node-level combiner the end stage of MapTask)
    
> Launching node-level combiner at the end stage of MapTask
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-4865
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4865
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: tasktracker
>    Affects Versions: 3.0.0
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>
> MapTask needs to start node-level aggregation against local outputs at the end stage of MapTask after calling getAggregationTargets().
> This feature is implemented with Merger and CombinerRunner.

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