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Nathan Roberts commented on YARN-4963: -------------------------------------- I don't believe test failures are related to this change. If someone has a few cycles for a review that would be great. This patch covers step #1 agreed to above. step #2 will be handled via YARN-5013. > capacity scheduler: Make number of OFF_SWITCH assignments per heartbeat > configurable > ------------------------------------------------------------------------------------ > > Key: YARN-4963 > URL: https://issues.apache.org/jira/browse/YARN-4963 > Project: Hadoop YARN > Issue Type: Improvement > Components: capacityscheduler > Affects Versions: 3.0.0, 2.7.2 > Reporter: Nathan Roberts > Assignee: Nathan Roberts > Attachments: YARN-4963.001.patch, YARN-4963.002.patch > > > Currently the capacity scheduler will allow exactly 1 OFF_SWITCH assignment > per heartbeat. With more and more non MapReduce workloads coming along, the > degree of locality is declining, causing scheduling to be significantly > slower. It's still important to limit the number of OFF_SWITCH assignments to > avoid densely packing OFF_SWITCH containers onto nodes. > Proposal is to add a simple config that makes the number of OFF_SWITCH > assignments configurable. > Will upload candidate patch shortly. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org