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From "Craig Welch (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3319) Implement a FairOrderingPolicy
Date Wed, 22 Apr 2015 19:14:01 GMT

     [ https://issues.apache.org/jira/browse/YARN-3319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Craig Welch updated YARN-3319:
    Attachment: YARN-3319.74.patch

> Implement a FairOrderingPolicy
> ------------------------------
>                 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,
YARN-3319.39.patch, YARN-3319.45.patch, YARN-3319.47.patch, YARN-3319.53.patch, YARN-3319.58.patch,
YARN-3319.70.patch, YARN-3319.71.patch, YARN-3319.72.patch, YARN-3319.73.patch, YARN-3319.74.patch
> Implement a FairOrderingPolicy 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
> 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 id, which is generally lexically
FIFO for that comparison

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