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Posted to issues@aurora.apache.org by "Maxim Khutornenko (JIRA)" <ji...@apache.org> on 2015/03/07 02:36:38 UTC

[jira] [Commented] (AURORA-1158) Consider finding preemption slots asynchronously

    [ https://issues.apache.org/jira/browse/AURORA-1158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14351293#comment-14351293 ] 

Maxim Khutornenko commented on AURORA-1158:
-------------------------------------------

https://reviews.apache.org/r/31821/

> Consider finding preemption slots asynchronously 
> -------------------------------------------------
>
>                 Key: AURORA-1158
>                 URL: https://issues.apache.org/jira/browse/AURORA-1158
>             Project: Aurora
>          Issue Type: Task
>          Components: Scheduler
>            Reporter: Maxim Khutornenko
>            Assignee: Maxim Khutornenko
>
> The current Preemptor implementation performs synchronous preemption victim search. This isn't necessary as resource swap cannot be performed within the same scheduling loop due to victims taking time to vacate their premises (being killed). 
> Consider asynchronous victim search/killing instead. That will move the heavy lifting out of the critical scheduling loop and remove "flat" preemptor perf tax applied on every failed task scheduling/assignment.  



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