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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15104) Hive on Spark generate more shuffle data than hive on mr
Date Fri, 07 Apr 2017 13:35:41 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15960801#comment-15960801
] 

Aihua Xu commented on HIVE-15104:
---------------------------------

[~lirui] I didn't have time to work on that . Feel free to take it over. 

> Hive on Spark generate more shuffle data than hive on mr
> --------------------------------------------------------
>
>                 Key: HIVE-15104
>                 URL: https://issues.apache.org/jira/browse/HIVE-15104
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>    Affects Versions: 1.2.1
>            Reporter: wangwenli
>            Assignee: Aihua Xu
>
> the same sql,  running on spark  and mr engine, will generate different size of shuffle
data.
> i think it is because of hive on mr just serialize part of HiveKey, but hive on spark
which using kryo will serialize full of Hivekey object.  
> what is your opionion?



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