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Posted to issues@spark.apache.org by "Matthew Farrellee (JIRA)" <ji...@apache.org> on 2014/09/07 14:12:28 UTC

[jira] [Commented] (SPARK-2023) PySpark reduce does a map side reduce and then sends the results to the driver for final reduce, instead do this more like Scala Spark.

    [ https://issues.apache.org/jira/browse/SPARK-2023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14124879#comment-14124879 ] 

Matthew Farrellee commented on SPARK-2023:
------------------------------------------

[~holdenk] are you still concerned about this? if not, will you close it? if so, how can we identify the bottleneck to fix it?

> PySpark reduce does a map side reduce and then sends the results to the driver for final reduce, instead do this more like Scala Spark.
> ---------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-2023
>                 URL: https://issues.apache.org/jira/browse/SPARK-2023
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark
>            Reporter: holdenk
>
> PySpark reduce does a map side reduce and then sends the results to the driver for final reduce, instead do this more like Scala Spark. The current implementation could be a bottleneck. 



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