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https://issues.apache.org/jira/browse/YARN-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15947674#comment-15947674
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Naganarasimha G R commented on YARN-5478:
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Had offline discussion with the above two points with [~leftnoteasy], And as
per it :
# If the node attribute expression is placed in {{affinityTargets}} then nodes
satisfying the node attribute expression will be selected and if placed in
{{antiAffinityTargets}} nodes *not* satisfying the node attribute expression
will be selected. And advantage is, we can have combinations of node label
expression, like delayed-or(placement-strategy-1, placement-strategy-2),
different placement-strategy has different node attribute expression.
# *PlacementStrategy* if it has scope as *RACK* and Node attribute affinity
target, then we can throw an exception not accept the RR.
> [YARN-4902] Define Java API for generalized & unified scheduling-strategies.
> ----------------------------------------------------------------------------
>
> Key: YARN-5478
> URL: https://issues.apache.org/jira/browse/YARN-5478
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Attachments: YARN-5478.1.patch, YARN-5478.2.patch,
> YARN-5478.preliminary-poc.1.patch, YARN-5478.preliminary-poc.2.patch
>
>
> Define Java API for application to specify generic scheduling requirements
> described in YARN-4902 design doc.
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