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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7972) Support inter-app placement constraints for allocation tags by application ID
Date Wed, 28 Feb 2018 23:32:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381234#comment-16381234
] 

Arun Suresh commented on YARN-7972:
-----------------------------------

Thanks for the patch [~cheersyang]

I see that currently you do not have an implementation for the not-self and all. I am guessing,
that is because it would require changes in the AllocationTagsManager as well - to aggregate
the cardinality across applicationIds. I am fine punting that to a separate JIRA given the
complexity, but maybe you can add support for it in the namespace parser and then throw an
exception in the PCUtils class that it is not supported.

As for the {{ns:}} prefix, I don't really mind it (given it is very short), but to [~leftnoteasy]'s
point, we should either use {{ns:}} or the {{yarn_application_label/}} prefix and remove the
other.

> Support inter-app placement constraints for allocation tags by application ID
> -----------------------------------------------------------------------------
>
>                 Key: YARN-7972
>                 URL: https://issues.apache.org/jira/browse/YARN-7972
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>            Priority: Major
>         Attachments: YARN-7972.001.patch, YARN-7972.002.patch
>
>
> Per discussion in [this comment|https://issues.apache.org/jira/browse/YARN-6599focusedCommentId=16319662&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16319662]
in  YARN-6599, we need to support inter-app PC for allocation tags.
> This will help to do better placement when dealing with potential competing resource
applications, e.g don't place two tensorflow workers from two different applications on one
same node.



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