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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3950) Remove code for merging files via MR job
Date Wed, 30 Jan 2013 12:39:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566422#comment-13566422
] 

Hudson commented on HIVE-3950:
------------------------------

Integrated in Hive-trunk-h0.21 #1946 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1946/])
    HIVE-3950 : Remove code for merging files via MR job (Ashutosh Chauhan, Reviewed by Namit
Jain) (Revision 1440238)

     Result = FAILURE
hashutosh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1440238
Files : 
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/conf/hive-default.xml.template
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/ErrorMsg.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRFileSink1.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/test/queries/clientnegative/dyn_part_merge.q
* /hive/trunk/ql/src/test/results/clientnegative/dyn_part_merge.q.out

                
> Remove code for merging files via MR job
> ----------------------------------------
>
>                 Key: HIVE-3950
>                 URL: https://issues.apache.org/jira/browse/HIVE-3950
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.11.0
>
>         Attachments: hive-3950_1.patch, hive-3950_2.patch, hive-3950.patch
>
>
> Hive can merge files either via MR job or via map only job. Obviously, doing it via map-only
job is more efficient, but there is an option of doing it via MR job as well because CombineFileInputFormat
is available only in hadoop-0.20 and later. Since, we no longer support hadoop versions earlier
than 20 anymore all that is now dead code, we should get rid of it.

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