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From "Jim Donofrio (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-391) Multi-table Accumulo input format
Date Thu, 02 Aug 2012 00:14:02 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427024#comment-13427024
] 

Jim Donofrio commented on ACCUMULO-391:
---------------------------------------

I am still learning about Accumulo but would there be any advantage to the inputformat offering
the option to combine multiple tablets across tables into a given split if they are on the
same tablet server in the case that some mappers complete their queries very quickly? This
would be similar to the CombineFileInputFormat over hdfs files
                
> Multi-table Accumulo input format
> ---------------------------------
>
>                 Key: ACCUMULO-391
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-391
>             Project: Accumulo
>          Issue Type: New Feature
>    Affects Versions: 1.5.0-SNAPSHOT
>            Reporter: John Vines
>            Assignee: William Slacum
>            Priority: Minor
>              Labels: mapreduce,
>         Attachments: multi-table-if.patch, new-multitable-if.patch
>
>
> Just realized we had no MR input method which supports multiple Tables for an input format.
I would see it making the table the mapper's key and making the Key/Value a tuple, or alternatively
have the Table/Key be the key tuple and stick with Values being the value.

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