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https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihong Yu updated HBASE-3996:
------------------------------

    Attachment: 3996-v6.txt

Patch v6 is same as Eran's patch v5, formatted to be accepted by review board.
                
> 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, 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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