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http://issues.apache.org/jira/browse/HADOOP-195?page=comments#action_12378090 ] 

Owen O'Malley commented on HADOOP-195:
--------------------------------------

No, I'm seeing a 0.01% timeout rate. There are 64k*2k = 128m getFile calls. 
Losing 29k of them is sub-optimal, but not a serious drain.

> transfer map output transfer with http instead of rpc
> -----------------------------------------------------
>
>          Key: HADOOP-195
>          URL: http://issues.apache.org/jira/browse/HADOOP-195
>      Project: Hadoop
>         Type: Improvement

>   Components: mapred
>     Versions: 0.2
>     Reporter: Owen O'Malley
>     Assignee: Owen O'Malley
>      Fix For: 0.3

>
> The data transfer of the map output should be transfered via http instead 
> rpc, because rpc is very slow for this application and the timeout behavior 
> is suboptimal. (server sends data and client ignores it because it took more 
> than 10 seconds to be received.)

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