hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5457) Add a KeyOnlyTextOutputFormat to enable streaming to write out text files without separators
Date Wed, 14 Aug 2013 04:26:48 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sandy Ryza updated MAPREDUCE-5457:
----------------------------------

    Summary: Add a KeyOnlyTextOutputFormat to enable streaming to write out text files without
separators  (was: Add a KeyOnlyTextOutputFormat to enable streaming write out text files without
separators)
    
> Add a KeyOnlyTextOutputFormat to enable streaming to write out text files without separators
> --------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5457
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5457
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 2.1.0-beta
>            Reporter: Sandy Ryza
>
> MR jobs sometimes want to just output lines of text, not key/value pairs.  TextOutputFormat
handles this by, if a null value is given, outputting only the key with no separator.  Streaming
jobs are unable to take advantage of this, because they can't output null values.  A text
output format that ignores values and only outputs keys would allow streaming jobs to output
lines of text. 

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message