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YARN-6106. Document FairScheduler 'allowPreemptionFrom' queue property. (Yufei Gu via rchiang)

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Ray Chiang 2017-01-20 14:04:10 -08:00
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/FairScheduler.md
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@ -119,6 +119,8 @@ The allocation file must be in XML format. The format contains five types of ele
* fairSharePreemptionThreshold: the fair share preemption threshold for the queue. If the queue waits fairSharePreemptionTimeout without receiving fairSharePreemptionThreshold\*fairShare resources, it is allowed to preempt containers to take resources from other queues. If not set, the queue will inherit the value from its parent queue.
* allowPreemptionFrom: determines whether the scheduler is allowed to preempt resources from the queue. The default is true. If a queue has this property set to false, this property will apply recursively to all child queues.
* **User elements**: which represent settings governing the behavior of individual users. They can contain a single property: maxRunningApps, a limit on the number of running apps for a particular user.
* **A userMaxAppsDefault element**: which sets the default running app limit for any users whose limit is not otherwise specified.