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https://issues.apache.org/jira/browse/SLIDER-799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14378469#comment-14378469
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ASF subversion and git services commented on SLIDER-799:
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Commit 7d9a9e942ead8343bc4e2c52419c1b258292ca15 in incubator-slider's branch
refs/heads/feature/SLIDER-799-AM-managed-relax from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-slider.git;h=7d9a9e9 ]
SLIDER-799 track outcome of allocation: whether an assignment was "open",
"placed", or "escalated"; this info is included in serialized/JSON views of
container state so can be retrieved by client APIs
> 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: Sub-task
> Components: appmaster
> Affects Versions: Slider 0.70
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Critical
> Fix For: Slider 0.80
>
> Original Estimate: 24h
> Time Spent: 24h
> Remaining Estimate: 8h
>
> 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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