[ https://issues.apache.org/jira/browse/YARN-3319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Craig Welch updated YARN-3319: ------------------------------ Attachment: YARN-3319.35.patch Apply after applying YARN-3318.35.patch > Implement a Fair SchedulerOrderingPolicy > ---------------------------------------- > > Key: YARN-3319 > URL: https://issues.apache.org/jira/browse/YARN-3319 > Project: Hadoop YARN > Issue Type: Sub-task > Components: scheduler > Reporter: Craig Welch > Assignee: Craig Welch > Attachments: YARN-3319.13.patch, YARN-3319.14.patch, > YARN-3319.17.patch, YARN-3319.35.patch > > > Implement a Fair Comparator for the Scheduler Comparator Ordering Policy > which prefers to allocate to SchedulerProcesses with least current usage, > very similar to the FairScheduler's FairSharePolicy. > The Policy will offer allocations to applications in a queue in order of > least resources used, and preempt applications in reverse order (from most > resources used). This will include conditional support for sizeBasedWeight > style adjustment > An implementation of a Scheduler Comparator for use with the Scheduler > Comparator Ordering Policy will be built with the below comparison for > ordering applications for container assignment (ascending) and for preemption > (descending) > Current resource usage - less usage is lesser > Submission time - earlier is lesser > Optionally, based on a conditional configuration to enable sizeBasedWeight > (default false), an adjustment to boost larger applications (to offset the > natural preference for smaller applications) will adjust the resource usage > value based on demand, dividing it by the below value: > Math.log1p(app memory demand) / Math.log(2); > In cases where the above is indeterminate (two applications are equal after > this comparison), behavior falls back to comparison based on the application > name, which is lexically FIFO for that comparison (first submitted is lesser) -- This message was sent by Atlassian JIRA (v6.3.4#6332)