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From "eric baldeschwieler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-619) Unify Map-Reduce and Streaming to take the same globbed input specification
Date Tue, 05 Dec 2006 08:18:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-619?page=comments#action_12455541 ] 
            
eric baldeschwieler commented on HADOOP-619:
--------------------------------------------

owen: yes

arkady: -input ...somepath/*/*.gz or somesuch should work in this proposal, so that should
solve your problem, right?

Maybe I should relax on allowing directories in glob patterns and directories.  It is just
that this sort of matching can be really messy on typos.  Standard unix tools don't allow
it.  But I guess as long as it is not recursive, the limits of input formats and such should
keep this from going too nuts.

So I'm ok with owen's proposal.  (No recursion, right?)

> Unify Map-Reduce and Streaming to take the same globbed input specification
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-619
>                 URL: http://issues.apache.org/jira/browse/HADOOP-619
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: eric baldeschwieler
>         Assigned To: Sanjay Dahiya
>
> Right now streaming input is specified very differently from other map-reduce input.
 It would be good if these two apps could take much more similar input specs.
> In particular -input in streaming expects a file or glob pattern while MR takes a directory.
 It would be cool if both could take a glob patern of files and if both took a directory by
default (with some patern excluded to allow logs, metadata and other framework output to be
safely stored).
> We want to be sure that MR input is backward compatible over this change.  I propose
that a single file should be accepted as an input or a single directory.  Globs should only
match directories if the paterns is '/' terminated, to avoid massive inputs specified by mistake.
> Thoughts?

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