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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-499) Avoid the use of Strings to improve the performance of hadoop streaming
Date Tue, 05 Sep 2006 21:53:23 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-499?page=all ]

Doug Cutting resolved HADOOP-499.
---------------------------------

    Resolution: Fixed

I just committed this.  Thanks, Hairong!

> Avoid the use of Strings to improve the  performance of hadoop streaming
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-499
>                 URL: http://issues.apache.org/jira/browse/HADOOP-499
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: contrib/streaming
>    Affects Versions: 0.5.0
>            Reporter: Hairong Kuang
>         Assigned To: Hairong Kuang
>             Fix For: 0.6.0
>
>         Attachments: text_streaming.patch
>
>
> In hadoop streaming, a record is represented as a String for  I/O and is encoded as UTF8
for map/reduce. A record has to be converted between String and UTF8 back and forth multiple
times and  this wastes CPU time. 

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