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https://issues.apache.org/jira/browse/YARN-3318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14353953#comment-14353953
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Craig Welch commented on YARN-3318:
-----------------------------------
Proposed elements of the framework:
A SchedulerProcess interface which generalizes processes to be managed by the
OrderingPolicy (initially, potentially in the future by other Policies as well)
Initial implementer will be the SchedulerApplicaitonAttempt.
An OrderingPolicy interface which exposes a collection of scheduler processes
which will be ordered by the policy for container assignment and preemption.
The ordering policy will provide one Iterator which presents processes in the
policy specific order for container assignment and another Iterator which
presents them in the proper order for preemption. It will also accept
SchedulerProcessEvents which may indicate a need to re-order the associated
SchedulerProcess (for example, after container completion, preemption,
assignment, etc)
> Create Initial OrderingPolicy Framework, integrate with CapacityScheduler
> LeafQueue supporting present behavior
> ---------------------------------------------------------------------------------------------------------------
>
> Key: YARN-3318
> URL: https://issues.apache.org/jira/browse/YARN-3318
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: scheduler
> Reporter: Craig Welch
>
> Create the initial framework required for using OrderingPolicies with
> SchedulerApplicaitonAttempts and integrate with the CapacityScheduler. This
> will include an implementation which is compatible with current FIFO behavior.
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