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Date: Thu, 3 Apr 2014 20:29:16 +0000 (UTC)
From: "Sergey Shelukhin (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12706104.1396416907054.59895.1396556956507@arcas>
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Subject: [jira] [Commented] (HIVE-6809) Support bulk deleting directories
 for partition drop with partial spec
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    [ https://issues.apache.org/jira/browse/HIVE-6809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13959169#comment-13959169 ] 

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

On code level patch looks ok.

1) I am not sure how acceptable it is to break thrift APIs.
[~ashutoshc] can you comment?

I wonder again if you can augment existing dropPartitions req/resp based API?
Or if not, maybe convert existing ones to req/resp if they are changing anyway, so it would be easier to change them later.

2) Can this also use bulk delete path from database? 


> 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
>
>
> 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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