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Posted to issues@hive.apache.org by "Aihua Xu (JIRA)" <ji...@apache.org> on 2016/11/01 17:30:58 UTC

[jira] [Assigned] (HIVE-15104) Hive on Spark generate more shuffle data than hive on mr

     [ https://issues.apache.org/jira/browse/HIVE-15104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aihua Xu reassigned HIVE-15104:
-------------------------------

    Assignee: Aihua Xu

> 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
>            Priority: Critical
>
> 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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