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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2102) Collect iops per task
Date Fri, 05 Aug 2011 14:01:28 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13079983#comment-13079983
] 

Robert Joseph Evans commented on MAPREDUCE-2102:
------------------------------------------------

I am not sure how to do this on other operating systems.  On Linux if Hadoop is running on
a newer Kernel then it can use /proc/<PID>/io, but I believe that it has to be newer
then 2.6.20.  Anything else would require a very ugly hack like LD_PRELOAD.

> Collect iops per task
> ---------------------
>
>                 Key: MAPREDUCE-2102
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2102
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: task
>            Reporter: Arun C Murthy
>
> We should enhance the MR framework to collect iops per task along with CPU/Memory (MAPREDUCE-220).

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