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Posted to issues@tez.apache.org by "Hitesh Shah (JIRA)" <ji...@apache.org> on 2015/02/14 03:57:11 UTC

[jira] [Commented] (TEZ-145) Support a combiner processor that can run non-local to map/reduce nodes

    [ https://issues.apache.org/jira/browse/TEZ-145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321186#comment-14321186 ] 

Hitesh Shah commented on TEZ-145:
---------------------------------

[~ozawa] In case you have started working on this, I have tagged this jira as a potential idea for Google Summer of code. 

> Support a combiner processor that can run non-local to map/reduce nodes
> -----------------------------------------------------------------------
>
>                 Key: TEZ-145
>                 URL: https://issues.apache.org/jira/browse/TEZ-145
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Hitesh Shah
>            Assignee: Tsuyoshi OZAWA
>              Labels: gsoc, gsoc2015, hadoop, java, tez
>
> For aggregate operators that can benefit by running in multi-level trees, support of being able to run a combiner in a non-local mode would allow performance efficiencies to be gained by running a combiner at a rack-level. 



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