hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-619) Unify Map-Reduce and Streaming to take the same globbed input specification
Date Fri, 01 Dec 2006 11:26:22 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-619?page=comments#action_12454880 ] 
            
Sanjay Dahiya commented on HADOOP-619:
--------------------------------------

If we have patterns in input path to MR, do we still check for existence of files matching
that pattern in dfs while validating the command? 
Currently its a single check which validates if directory exists, with patterns we will need
to fetch all the files in the directory and match the pattern and if no file matches the pattern
then show error and exit. This will be done in job client. 

comments?

> 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
>
> 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?

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message