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From "Rui Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9561) SHUFFLE_SORT should only be used for order by query [Spark Branch]
Date Thu, 12 Feb 2015 13:05:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14318145#comment-14318145
] 

Rui Li commented on HIVE-9561:
------------------------------

I can't post the patch to RB. Will try again later.

> SHUFFLE_SORT should only be used for order by query [Spark Branch]
> ------------------------------------------------------------------
>
>                 Key: HIVE-9561
>                 URL: https://issues.apache.org/jira/browse/HIVE-9561
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Rui Li
>            Assignee: Rui Li
>         Attachments: HIVE-9561.1-spark.patch, HIVE-9561.2-spark.patch
>
>
> The {{sortByKey}} shuffle launches probe jobs. Such jobs can hurt performance and are
difficult to control. So we should limit the use of {{sortByKey}} to order by query only.



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