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Posted to mapreduce-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/05/12 02:28:47 UTC

[jira] [Commented] (MAPREDUCE-1106) LocalJobRunner should run with any file-system

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032199#comment-13032199 ] 

Todd Lipcon commented on MAPREDUCE-1106:
----------------------------------------

I'm a little confused by this JIRA. It seems that {{LocalJobRunner.fs}} is only used for the system files and staging area. Even if you're running a job with input or output on HDFS, these still make sense to keep on the local FS.

So, what is the use case that this JIRA attempts to address?

> LocalJobRunner should run with any file-system
> ----------------------------------------------
>
>                 Key: MAPREDUCE-1106
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1106
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Rohan A Mehta
>              Labels: newbie
>         Attachments: MAPREDUCE-1106.patch
>
>
> LocalJobRunner is hard-coded to run with only the local file-system. This will help users write map/reduce programs in local mode yet accessing input/schema/data files etc. from any file system.

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