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https://issues.apache.org/jira/browse/AURORA-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Lambert updated AURORA-1219:
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Sprint: Twitter Aurora Q2'15 Sprint 1
> Improve preemptor efficiency
> ----------------------------
>
> Key: AURORA-1219
> URL: https://issues.apache.org/jira/browse/AURORA-1219
> Project: Aurora
> Issue Type: Task
> Components: Scheduler
> Reporter: Maxim Khutornenko
> Assignee: Maxim Khutornenko
>
> While AURORA-1158 makes the preemptor asynchronous and helps scheduling loop
> performance, it loses some preemption efficiency due to adapting the original
> algorithm to work asynchronously:
> - Preemptor repeatedly searches for preemption slots with the same
> ClusterState increasing the probability of victim collisions.
> - Slave/offer/resource mappings are redundantly recomputed for every pending
> task slot search.
> - Pending tasks are repeatedly sized up against every slave (as opposed to
> the other way around) making internal loop optimizations more expensive (i.e.
> pending task count is expected to be << slave count under normal conditions).
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