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Xianyin Xin commented on YARN-4752: ----------------------------------- hi [~kasha], can we consider to decouple the scheduling and preemption using the same {{getResourceUsage() }} as it block YARN-4120 and YARN-4090 which aims to improve the scheduling throughput? As discussed in YARN-4120, see, e.g, https://issues.apache.org/jira/browse/YARN-4120?focusedCommentId=14733235&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14733235. Thanks. > [Umbrella] FairScheduler: Improve preemption > -------------------------------------------- > > Key: YARN-4752 > URL: https://issues.apache.org/jira/browse/YARN-4752 > Project: Hadoop YARN > Issue Type: Bug > Components: fairscheduler > Affects Versions: 2.8.0 > Reporter: Karthik Kambatla > > A number of issues have been reported with respect to preemption in > FairScheduler along the lines of: > # FairScheduler preempts resources from nodes even if the resultant free > resources cannot fit the incoming request. > # Preemption doesn't preempt from sibling queues > # Preemption doesn't preempt from sibling apps under the same queue that is > over its fairshare > # ... > Filing this umbrella JIRA to group all the issues together and think of a > comprehensive solution. -- This message was sent by Atlassian JIRA (v6.3.4#6332)