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From "Bohdan Mushkevych (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3996) Support multiple tables and scanners as input to the mapper in map/reduce jobs
Date Thu, 26 Apr 2012 17:28:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262770#comment-13262770
] 

Bohdan Mushkevych commented on HBASE-3996:
------------------------------------------

@stack, @Ted Yu, @Lars Hofhansl
Gentlemen, it seams that last changes [1] were submitted 4 weeks ago.
My personal fear is that the ticket will get "outdated" due to Trunk changes and will miss
0.94-0.96 target.

[1] Diff r7 
https://reviews.apache.org/r/4411/diff/7/
                
> Support multiple tables and scanners as input to the mapper in map/reduce jobs
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-3996
>                 URL: https://issues.apache.org/jira/browse/HBASE-3996
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>            Reporter: Eran Kutner
>            Assignee: Eran Kutner
>             Fix For: 0.96.0
>
>         Attachments: 3996-v2.txt, 3996-v3.txt, 3996-v4.txt, 3996-v5.txt, 3996-v6.txt,
3996-v7.txt, HBase-3996.patch
>
>
> It seems that in many cases feeding data from multiple tables or multiple scanners on
a single table can save a lot of time when running map/reduce jobs.
> I propose a new MultiTableInputFormat class that would allow doing this.

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