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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2084) Upgrade datanucleus from 2.0.3 to 3.0.1
Date Wed, 03 Jul 2013 18:56:22 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699318#comment-13699318
] 

Ashutosh Chauhan commented on HIVE-2084:
----------------------------------------

Yeah.. I think we need to move forward on this. Based on Deepesh's comments and Ning's comment
earlier in thread, it seems like we need to provide an upgrade script for folks who already
have their metastore created with 2.x version of DN. [~navis] wondering if you have done some
investigation on that ?
                
> Upgrade datanucleus from 2.0.3 to 3.0.1
> ---------------------------------------
>
>                 Key: HIVE-2084
>                 URL: https://issues.apache.org/jira/browse/HIVE-2084
>             Project: Hive
>          Issue Type: Improvement
>          Components: Metastore
>            Reporter: Ning Zhang
>            Assignee: Sushanth Sowmyan
>              Labels: datanucleus
>         Attachments: ASF.LICENSE.NOT.GRANTED--HIVE-2084.D2397.1.patch, HIVE-2084.1.patch.txt,
HIVE-2084.2.patch.txt, HIVE-2084.D5685.1.patch, HIVE-2084.patch
>
>
> It seems the datanucleus 2.2.3 does a better join in caching. The time it takes to get
the same set of partition objects takes about 1/4 of the time it took for the first time.
While with 2.0.3, it took almost the same amount of time in the second execution. We should
retest the test case mentioned in HIVE-1853, HIVE-1862.

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