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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4334) Add support for CPU isolation/monitoring of containers
Date Fri, 13 Jul 2012 05:13:36 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413499#comment-13413499
] 

Todd Lipcon commented on MAPREDUCE-4334:
----------------------------------------

bq. Preventing such onerous requirements on cluster setup is a key goal - something which
initially led to creation of LinuxTaskController etc.

How is it onerous? Packages could easily do this as part of the install on platforms where
it's supported.

It seems equivalent to the installation of the LTC itself, which requires root to make it
setuid, right?

Andrew: do the cgroups persist cross-reboot, or does that cgcreate command need to go the
startup scripts?
                
> Add support for CPU isolation/monitoring of containers
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-4334
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4334
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>            Reporter: Arun C Murthy
>            Assignee: Andrew Ferguson
>         Attachments: MAPREDUCE-4334-pre1.patch, MAPREDUCE-4334-pre2-with_cpu.patch, MAPREDUCE-4334-pre2.patch,
MAPREDUCE-4334-pre3-with_cpu.patch, MAPREDUCE-4334-pre3.patch
>
>
> Once we get in MAPREDUCE-4327, it will be important to actually enforce limits on CPU
consumption of containers. 
> Several options spring to mind:
> # taskset (RHEL5+)
> # cgroups (RHEL6+)

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