[ https://issues.apache.org/jira/browse/YARN-1010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283660#comment-16283660 ]
stefanlee commented on YARN-1010: --------------------------------- Thanks [~ywskycn] , i have a doubt that if _if (!completedContainers.isEmpty())_ will impact scheduler performance, why add this judgment here? > FairScheduler: decouple container scheduling from nodemanager heartbeats > ------------------------------------------------------------------------ > > Key: YARN-1010 > URL: https://issues.apache.org/jira/browse/YARN-1010 > Project: Hadoop YARN > Issue Type: Improvement > Components: scheduler > Affects Versions: 2.1.0-beta > Reporter: Alejandro Abdelnur > Assignee: Wei Yan > Priority: Critical > Fix For: 2.3.0 > > Attachments: YARN-1010.patch, YARN-1010.patch > > > Currently scheduling for a node is done when a node heartbeats. > For large cluster where the heartbeat interval is set to several seconds this > delays scheduling of incoming allocations significantly. > We could have a continuous loop scanning all nodes and doing scheduling. If > there is availability AMs will get the allocation in the next heartbeat after > the one that placed the request. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org