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Date: Wed, 21 Mar 2012 15:59:40 +0000 (UTC)
From: "Zhihong Yu (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-3996) Support multiple tables and
 scanners as input to the mapper in map/reduce jobs
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    [ https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234444#comment-13234444 ] 

Zhihong Yu commented on HBASE-3996:
-----------------------------------

@Stack:
Thanks for the detailed review.

@Eran:
If you don't have time to respond, please let me know.
                
> 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: 0.94.0, 0.96.0
>
>         Attachments: 3996-v2.txt, 3996-v3.txt, 3996-v4.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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