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Wangda Tan commented on YARN-2498: ---------------------------------- Attached implementation notes, [~curino], [~sunilg], [~mayank_bansal], I would appreciate if you can take a look at it. Thanks a lot! Wangda > [YARN-796] Respect labels in preemption policy of capacity scheduler > -------------------------------------------------------------------- > > 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: YARN-2498.patch, YARN-2498.patch, > yarn-2498-implementation-notes.pdf > > > 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 there're some resource available in the cluster, we shouldn't > assign it to a queue (by increasing {{ideal_assigned}}) if the queue cannot > access such labels > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)