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From "Gour Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7142) Support placement policy in yarn native services
Date Tue, 27 Mar 2018 21:50:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16416297#comment-16416297
] 

Gour Saha commented on YARN-7142:
---------------------------------

[~leftnoteasy] thank you for the review.

bq. 1) Placement policy removed from Service? How user to specify common placement policies
for components.
I don't think common/service-level placement policies make sense at least in this first phase
of implementation since we support self allocation tag namespace only. We can introduce service
level placement policy later once we support other namespaces and if it seems helpful. For
now, it will be good to keep it simple.

bq. 2) Compatibility of the placement policy?
The existing placement policy was a dummy placeholder and not supported. There was no implementation
backing it. Hence there should not be any backward compatibility issue.

I incorporated all your other suggestions in patch 002.

> Support placement policy in yarn native services
> ------------------------------------------------
>
>                 Key: YARN-7142
>                 URL: https://issues.apache.org/jira/browse/YARN-7142
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn-native-services
>            Reporter: Billie Rinaldi
>            Assignee: Gour Saha
>            Priority: Major
>         Attachments: YARN-7142.001.patch, YARN-7142.002.patch
>
>
> Placement policy exists in the API but is not implemented yet.
> I have filed YARN-8074 to move the composite constraints implementation out of this
phase-1 implementation of placement policy.



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