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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9561) SHUFFLE_SORT should only be used for order by query [Spark Branch]
Date Tue, 17 Feb 2015 07:08:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14323759#comment-14323759
] 

Xuefu Zhang commented on HIVE-9561:
-----------------------------------

Unfortunately the patch doesn't apply any more after recent trunk to branch merge. Could you
please rebase?

> 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, HIVE-9561.3-spark.patch,
HIVE-9561.4-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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