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https://issues.apache.org/jira/browse/YARN-3319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14509641#comment-14509641
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Craig Welch commented on YARN-3319:
-----------------------------------
Yes, it's configured in the capacity scheduler configuration with something
like this:
{code}
<property>
<name>(yarn-queue-prefix).ordering-policy.fair.enable-size-based-weight</name>
<value>true</value>
</property>
{code}
> 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
> Fix For: 2.8.0
>
> 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, YARN-3319.75.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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