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Posted to dev@crunch.apache.org by "Joseph Adler (JIRA)" <ji...@apache.org> on 2013/03/14 23:26:13 UTC

[jira] [Commented] (CRUNCH-165) Pipelines should automatically use CombineFileInputFormat where input consists of many small files

    [ https://issues.apache.org/jira/browse/CRUNCH-165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13602831#comment-13602831 ] 

Joseph Adler commented on CRUNCH-165:
-------------------------------------

I've done some work on this in the past. I can contribute an Avro version if that would help.
                
> Pipelines should automatically use CombineFileInputFormat where input consists of many small files
> --------------------------------------------------------------------------------------------------
>
>                 Key: CRUNCH-165
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-165
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.4.0
>            Reporter: Dave Beech
>            Assignee: Josh Wills
>
> Hive had a feature introduced in HIVE-74 whereby CombineFileInputFormat would be used if the input data consisted of many small files, making the resulting mapreduce jobs more efficient by giving individual mappers more data to process. This would be a nice feature for Crunch to have, too.

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