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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-5575) regarding output dir usage
Date Fri, 03 Apr 2009 17:08:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Owen O'Malley resolved HADOOP-5575.

    Resolution: Cannot Reproduce

This really isn't a bug. Please ask questions over on core-user if you have questions about
how to setup your application.

> regarding output dir usage
> --------------------------
>                 Key: HADOOP-5575
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5575
>             Project: Hadoop Core
>          Issue Type: Task
>         Environment: ubuntu hardy
>            Reporter: girija l
>             Fix For: 0.20.0
> I want to do following:
> 1. A Sequence of map-reduce operations - Found no relevant link / template of how it
is done.
> 2. An an alternative I thought of passing output/part-00000 file to next map-reduce as
input file, but then I got the exception for wrong FS while accessing output dir. This bug
is already fixed in 0.20, but this version I am not able to find on apache core - download
release page.
> Can anyone help me out with 0.20 distribution?
> Also, if possible can anyone give me an idea of how I can do a sequence of map-reduce
> One more point is - I want my map task to access a common file which ENTIRELY should
be accessible to it (i.e. not a split one, but the whole file a map task should be able to
READ) and the same file I want my reducer task to write into.
> 2 things:
> 1. how to set such file which won't be split but will be given to each map task entirely?
> 2. how can i make all my reducer operating in parallel to modify such file, which will
be used for next iteration?
> I am not sure whether the things I mentioned above are indeed possible. I am new to hadoop..
> Please help,
> Thanks,
> -- 
> Girija

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