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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6809) Support bulk deleting directories for partition drop with partial spec
Date Mon, 28 Apr 2014 21:35:15 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13983594#comment-13983594
] 

Sergey Shelukhin commented on HIVE-6809:
----------------------------------------

This appears to have stalled. I still wonder about breaking APIs and why two optimizations
in metastore have to be separate. 

> Support bulk deleting directories for partition drop with partial spec
> ----------------------------------------------------------------------
>
>                 Key: HIVE-6809
>                 URL: https://issues.apache.org/jira/browse/HIVE-6809
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>         Attachments: HIVE-6809.1.patch.txt, HIVE-6809.2.patch.txt, HIVE-6809.3.patch.txt,
HIVE-6809.4.patch.txt
>
>
> In busy hadoop system, dropping many of partitions takes much more time than expected.
In hive-0.11.0, removing 1700 partitions by single partial spec took 90 minutes, which is
reduced to 3 minutes when deleteData is set false. I couldn't test this in recent hive, which
has HIVE-6256 but if the time-taking part is mostly from removing directories, it seemed not
helpful to reduce whole processing time.



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