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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2006/09/05 23:53:23 UTC
[jira] Resolved: (HADOOP-499) Avoid the use of Strings to improve
the performance of hadoop streaming
[ 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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