[jira] [Commented] (SPARK-6377) Set the number of shuffle partitions for Exchange operator automatically based on the size of input tables and the reduce-side operation.

["Yin Huai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-6377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14365203#comment-14365203 ] 

Yin Huai commented on SPARK-6377:
---------------------------------

[~sowen] I's related to that one. But, the scope of this one is for the Exchange operator in Spark SQL (the conf is spark.sql.shuffle.partitions). Also, as the first step, we will take a static approach and determine the number at the query compilation time instead of adjusting it at runtime.

> Set the number of shuffle partitions for Exchange operator automatically based on the size of input tables and the reduce-side operation.
> -----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-6377
>                 URL: https://issues.apache.org/jira/browse/SPARK-6377
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Yin Huai
>
> It will be helpful to automatically set the number of shuffle partitions based on the size of input tables and the operation at the reduce side for an Exchange operator.



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