[jira] [Updated] (SLIDER-799) AM to decide when to relax placement policy from specific host to rack/cluster

["Steve Loughran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLIDER-799?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated SLIDER-799:
----------------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: SLIDER-611

> 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
>  Remaining Estimate: 24h
>
> 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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