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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Closed: (HADOOP-195) improve performance of map output transfers
Date Mon, 05 Jun 2006 23:08:43 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-195?page=all ]
     
Doug Cutting closed HADOOP-195:
-------------------------------


> improve performance of map output transfers
> -------------------------------------------
>
>          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: 0.3.0
>  Attachments: MapFileSimulator.java, data-transfer-chart.pdf, mapfilesimulator-big.txt,
mapfilesimulator-sort2.txt, netstat.log, netstat.xls, parallel-copiers.txt
>
> 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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