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https://issues.apache.org/jira/browse/YARN-2498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510181#comment-14510181
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Wangda Tan commented on YARN-2498:
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Failed test is not related to the patch, white space could be addressed before
commit via (git apply --whitespace=fix). Checkstyle needs revisit: HADOOP-11869.
> Respect labels in preemption policy of capacity scheduler for inter-queue
> preemption
> ------------------------------------------------------------------------------------
>
> Key: YARN-2498
> URL: https://issues.apache.org/jira/browse/YARN-2498
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Attachments: STALED-YARN-2498.zip, YARN-2498.1.patch,
> YARN-2498.2.patch, YARN-2498.3.patch, YARN-2498.4.patch
>
>
> There're 3 stages in ProportionalCapacityPreemptionPolicy,
> # Recursively calculate {{ideal_assigned}} for queue. This is depends on
> available resource, resource used/pending in each queue and guaranteed
> capacity of each queue.
> # Mark to-be preempted containers: For each over-satisfied queue, it will
> mark some containers will be preempted.
> # Notify scheduler about to-be preempted container.
> We need respect labels in the cluster for both #1 and #2:
> For #1, when calculating ideal_assigned for each queue, we need get
> by-partition-ideal-assigned according to queue's
> guaranteed/maximum/used/pending resource on specific partition.
> For #2, when we make decision about whether we need preempt a container, we
> need make sure, resource this container is *possibly* usable by a queue which
> is under-satisfied and has pending resource.
> In addition, we need to handle ignore_partition_exclusivity case, when we
> need to preempt containers from a queue's partition, we will first preempt
> ignore_partition_exclusivity allocated containers.
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