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From "Carlo Curino (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1471) The SLS simulator is not running the preemption policy for CapacityScheduler
Date Wed, 04 Dec 2013 01:58:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-1471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13838488#comment-13838488
] 

Carlo Curino commented on YARN-1471:
------------------------------------

As I raised during the discussion in https://issues.apache.org/jira/browse/YARN-1021?focusedCommentId=13745799&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13745799
the simulator is not currently compatible with the CapacityScheduler preemption mechanisms.
 
More generally the "wrapping" done is likely to break interactions among components that are
accessing not only the top-level interfaces, but leverage specifics of each scheduler. It
would be nice to find some better wrapping mechanism. [~ywskycn], [~tucu00]... any idea?



> The SLS simulator is not running the preemption policy for CapacityScheduler
> ----------------------------------------------------------------------------
>
>                 Key: YARN-1471
>                 URL: https://issues.apache.org/jira/browse/YARN-1471
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Carlo Curino
>            Assignee: Wei Yan
>            Priority: Minor
>
> The simulator does not run the ProportionalCapacityPreemptionPolicy monitor.  This is
because the policy needs to interact with a CapacityScheduler, and the wrapping done by the
simulator breaks this. 



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