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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-195) transfer map output transfer with http instead of rpc
Date Fri, 05 May 2006 20:22:29 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-195?page=comments#action_12378130 ] 

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

The code that I'm testing with is in the examples directory.

randomwriter generates 1g/map and 10 maps/node for a total of 1880 g of data.
the sequence file format splits that into 63920 maps and I use 1880 reduces.



> 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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