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From "Rui Li (JIRA)" <>
Subject [jira] [Updated] (HIVE-15104) Hive on Spark generate more shuffle data than hive on mr
Date Tue, 24 Oct 2017 04:17:00 GMT


Rui Li updated HIVE-15104:
    Attachment: HIVE-15104.10.patch

Update to address review comments. Also changed the default switch back to false.

> Hive on Spark generate more shuffle data than hive on mr
> --------------------------------------------------------
>                 Key: HIVE-15104
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>    Affects Versions: 1.2.1
>            Reporter: wangwenli
>            Assignee: Rui Li
>         Attachments: HIVE-15104.1.patch, HIVE-15104.10.patch, HIVE-15104.2.patch, HIVE-15104.3.patch,
HIVE-15104.4.patch, HIVE-15104.5.patch, HIVE-15104.6.patch, HIVE-15104.7.patch, HIVE-15104.8.patch,
HIVE-15104.9.patch, TPC-H 100G.xlsx
> the same sql,  running on spark  and mr engine, will generate different size of shuffle
> 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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