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https://issues.apache.org/jira/browse/YARN-7920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364783#comment-16364783
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Konstantinos Karanasos commented on YARN-7920:
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Re: configuration, I think it is simpler at the moment to leave it as is (i.e.,
placement-processor/scheduler). I chatted offline with Arun and he is fine with
is as well.
Re: the .md.vm format, I remember [~cheersyang] used this format for the
opportunistic containers doc that I had written, so I thought it is preferable.
Weiwei, any advantages in this format?
Re: the naming, I think all is fine now apart from the NonePlacementProcessor
that sounds weird. Looking at it better, indeed Default is not okay (initially
I thought it is a no-op, but in fact it rejects scheduling requests). Any of
the following is fine with me: DisabledConstraintProcessor,
UnsupportedConstraintProcessor, RejectConstraintProcessor?
>From a quick look, documentation looks fine. I can make a pass over it before
>I commit the patch.
> Cleanup configuration of PlacementConstraints
> ---------------------------------------------
>
> Key: YARN-7920
> URL: https://issues.apache.org/jira/browse/YARN-7920
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Priority: Blocker
> Attachments: YARN-7920.001.patch, YARN-7920.002.patch,
> YARN-7920.003.patch, YARN-7920.004.patch
>
>
> Currently it is very confusing to have the two configs in two different files
> (yarn-site.xml and capacity-scheduler.xml).
>
> Maybe a better approach is: we can delete the scheduling-request.allowed in
> CS, and update placement-constraints configs in yarn-site.xml a bit:
>
> - Remove placement-constraints.enabled, and add a new
> placement-constraints.handler, by default is none, and other acceptable
> values are a. external-processor (since algorithm is too generic to me), b.
> scheduler.
> - And add a new PlacementProcessor just to pass SchedulingRequest to
> scheduler without any modifications.
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