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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/04/27 18:59:13 UTC

[jira] [Assigned] (SPARK-14960) Don't perform treeAggregation in local mode

     [ https://issues.apache.org/jira/browse/SPARK-14960?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-14960:
------------------------------------

    Assignee:     (was: Apache Spark)

> Don't perform treeAggregation in local mode
> -------------------------------------------
>
>                 Key: SPARK-14960
>                 URL: https://issues.apache.org/jira/browse/SPARK-14960
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Josh Rosen
>
> I don't think that {{treeAggregation}} will help performance in {{local}} mode and based on measurement of some unit tests it looks like it actually severely harms performance in certain cases. Therefore, treeAggregate should fall back to plain aggregate when running in local mode.



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