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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2012/10/22 08:12:14 UTC

[jira] [Assigned] (HBASE-3996) Support multiple tables and scanners as input to the mapper in map/reduce jobs

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

Lars Hofhansl reassigned HBASE-3996:
------------------------------------

    Assignee: Lars Hofhansl  (was: Eran Kutner)
    
> 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: Lars Hofhansl
>             Fix For: 0.94.3, 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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