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From "Joydeep Sen Sarma (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-2046) A CombineFileInputSplit cannot be less than a dfs block
Date Sun, 05 Sep 2010 07:34:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906326#action_12906326
] 

Joydeep Sen Sarma commented on MAPREDUCE-2046:
----------------------------------------------

+1 from my side.

> A CombineFileInputSplit cannot be less than a dfs block 
> --------------------------------------------------------
>
>                 Key: MAPREDUCE-2046
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2046
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Namit Jain
>            Assignee: dhruba borthakur
>         Attachments: combineFileInputFormatMaxSize.txt, combineFileInputFormatMaxSize2.txt
>
>
> I ran into this while testing some hive features.
> Whether we use hiveinputformat or combinehiveinputformat, a split cannot be less than
a dfs block size.
> This is a problem if we want to increase the block size for older data to reduce memory
consumption for the
> name node.
> It would be useful if the input split was independent of the dfs block size.

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