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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4492) Add documentation for preemption supported in Capacity scheduler
Date Tue, 12 Jan 2016 18:59:40 GMT

    [ https://issues.apache.org/jira/browse/YARN-4492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15094506#comment-15094506
] 

Eric Payne commented on YARN-4492:
----------------------------------

Thanks for updating the patch so quickly, [~Naganarasimha]. I think it looks good overall.
I have a couple of minor grammatical nits:
bq. The CapacityScheduler supports preemption of container(s) from the queues whose resource
usage is more than their guaranteed capacity. Following configuration parameters needs to
be enabled in yarn-site.xml, for supporting preemption of application containers.
- I would say {{container}} rather than {{container(s)}}
- {{_The_ following configuration parameters _need_ to ...}}
- Take out comma after {{yarn-site.xml}}

bq. yarn.resourcemanager.scheduler.monitor.policies
- {{Configured policies _need_ to be ...}}

bq. Following configuration parameters can be configured in yarn-site.xml, to control the
preemption of containers when ProportionalCapacityPreemptionPolicy class is configured for
yarn.resourcemanager.scheduler.monitor.policies
- I would remove the comma after {{yarn-site.xml}}

Other than that, it looks good.

> Add documentation for preemption supported in Capacity scheduler
> ----------------------------------------------------------------
>
>                 Key: YARN-4492
>                 URL: https://issues.apache.org/jira/browse/YARN-4492
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacity scheduler
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>            Priority: Minor
>         Attachments: CapacityScheduler.html, YARN-4492.v1.001.patch, YARN-4492.v1.002.patch,
YARN-4492.v1.003.patch, YARN-4492.v2.001.patch
>
>
> As part of YARN-2056, Support has been added to disable preemption for a specific queue.
This is a useful feature in a multiload cluster but currently missing documentation. 
> Complete preemption is not documented hence update all configurations for capacity scheduler
preemption



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