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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 Wed, 10 May 2006 14:17:05 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-195?page=comments#action_12378927 ] 

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

Ok, last night's run with the parallel fetches (upto 5 at a time) finished in 14.13 hours.
The input data and cluster were the same as monday's run.

None of the reduces failed, which helped.

After I take the kids to school and get into the office, I'll take a closer look at the logs.

> 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
>  Attachments: netstat.log, netstat.xls
>
> 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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