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https://issues.apache.org/jira/browse/TEZ-145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321804#comment-14321804
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Tsuyoshi OZAWA commented on TEZ-145:
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[~bikassaha] [~gopalv] I meant following configurations:
* Creating DAGs with CombinerProcessor via YARNRunner#createDAG only when
configuration is enabled.
* CombinerProcessor works with TaskLocationHint.
What do you think?
> 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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