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https://issues.apache.org/jira/browse/SLIDER-799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14341009#comment-14341009
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Steve Loughran commented on SLIDER-799:
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SLIDER-611 depends on this feature
> AM to decide when to relax placement policy from specific host to rack/cluster
> ------------------------------------------------------------------------------
>
> Key: SLIDER-799
> URL: https://issues.apache.org/jira/browse/SLIDER-799
> Project: Slider
> Issue Type: Improvement
> Components: appmaster
> Affects Versions: Slider 0.70
> Reporter: Steve Loughran
> Fix For: Slider 0.80
>
>
> If Slider asks for relaxed affinity, YARN only gives it ~1 second for free
> capacity to appear on a node before it falls back to non-local assignment.
> While this is OK for analytics throughput, it's suboptimal for placement of
> code such as HBase region servers.
> AM needs to take charge of the placement and decide for itself when to
> convert from placed to relaxed.
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