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https://issues.apache.org/jira/browse/YARN-7972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381391#comment-16381391
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Weiwei Yang commented on YARN-7972:
-----------------------------------
Hi [~leftnoteasy], [~asuresh]
Thanks for the feedback. I think I agree with [~leftnoteasy], we can remove
{{ns:}} prefix
# app-label/<application-label>/<tag>
# app-id/<application-id>/<tag>
# self/<tag>
# not-self/<tag>
# all/<tag>
# <tag> ---> this equals to ns:self/<tag>
Note, app-label, app-id, self, not-self and all are *system-preserved namespace
prefixes*, if any other prefix given, we will give an invalid namespace error
during the validation. So either user uses a pre-defined namespace prefix (#1
to #5), or do not add a namespace which actually means self. I will update the
patch to do so.
[~asuresh], the reason not-self and all is not yet implemented is just because
we need more changes in AllocationTagsManager, so I would like to do this
step-by-step. And actually there is an exception thrown in
{{AllocationTagNamespace#parse}} when it met any forms it current doesn't
support, so I guess that addresses your concern?
Does this sound good to you?
> 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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