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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7509) Fast stripe level merging for ORC
Date Sat, 06 Sep 2014 05:02:28 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14124315#comment-14124315
] 

Lefty Leverenz commented on HIVE-7509:
--------------------------------------

Just for the record:  HIVE-7704 will remove *hive.merge.input.format.stripe.level* (patches
5+).

> Fast stripe level merging for ORC
> ---------------------------------
>
>                 Key: HIVE-7509
>                 URL: https://issues.apache.org/jira/browse/HIVE-7509
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.14.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>              Labels: TODOC14, orcfile
>             Fix For: 0.14.0
>
>         Attachments: HIVE-7509.1.patch, HIVE-7509.2.patch, HIVE-7509.3.patch, HIVE-7509.4.patch,
HIVE-7509.5.patch
>
>
> Similar to HIVE-1950, add support for fast stripe level merging of ORC files through
CONCATENATE command and conditional merge task. This fast merging is ideal for merging many
small ORC files to a larger file without decompressing and decoding the data of small orc
files.



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