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https://issues.apache.org/jira/browse/YARN-6831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802710#comment-17802710
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Shilun Fan commented on YARN-6831:
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Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a
blocker. Retarget 3.5.0.
> Miscellaneous refactoring changes of ContainScheduler
> ------------------------------------------------------
>
> Key: YARN-6831
> URL: https://issues.apache.org/jira/browse/YARN-6831
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Priority: Major
>
> While reviewing YARN-6706, Karthik pointed out a few issues for improvment in
> ContainerScheduler
> *Make ResourceUtilizationTracker pluggable. That way, we could use a
> different tracker when oversubscription is enabled.
> *ContainerScheduler
> ##Why do we need maxOppQueueLength given queuingLimit?
> ##Is there value in splitting runningContainers into runningGuaranteed and
> runningOpportunistic?
> ##getOpportunisticContainersStatus method implementation feels awkward. How
> about capturing the state in the field here, and have metrics etc. pull from
> here?
> ##startContainersFromQueue: Local variable resourcesAvailable is unnecessary
> *OpportunisticContainersStatus
> ##Let us clearly differentiate between allocated, used and utilized. Maybe,
> we should rename current Used methods to Allocated?
> ##I prefer either full name Opportunistic (in method) or Opp (shortest name
> that makes sense). Opport is neither short nor fully descriptive.
> ##Have we considered folding ContainerQueuingLimit class into this?
> We decided to move the issues into this follow up jira to keep YARN-6706
> moving forward to unblock oversubscription work.
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