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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-195) transfer map output transfer with http instead of rpc
Date Mon, 08 May 2006 04:34:23 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-195?page=all ]

Owen O'Malley updated HADOOP-195:
---------------------------------

    Attachment: netstat.log

Here are two dumps of "netstat -ees" taken ~5 hours apart on one of the worker nodes during
reduce.  Let me know if you see anything interesting.

> 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
>
> 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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