YARN-4857. Add missing default configuration regarding preemption of CapacityScheduler. Contributed by Kai Sasaki.
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@ -908,6 +908,64 @@
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<value>600000</value>
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</property>
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<property>
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<description>
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If true, run the policy but do not affect the cluster with preemption and kill events.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.observe_only</name>
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<value>false</value>
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</property>
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<property>
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<description>
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Time in milliseconds between invocations of this ProportionalCapacityPreemptionPolicy
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policy.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.monitoring_interval</name>
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<value>3000</value>
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</property>
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<property>
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<description>
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Time in milliseconds between requesting a preemption from an application and killing
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the container.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.max_wait_before_kill</name>
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<value>15000</value>
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</property>
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<property>
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<description>
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Maximum percentage of resources preempted in a single round. By controlling this valueone
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can throttle the pace at which containers are reclaimed from the cluster. After computing
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the total desired preemption, the policy scales it back within this limit.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.total_preemption_per_round</name>
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<value>0.1</value>
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</property>
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<property>
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<description>
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Maximum amount of resources above the target capacity ignored for preemption.
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This defines a deadzone around the target capacity that helps prevent thrashing and
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oscillations around the computed target balance. High values would slow the time to capacity
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and (absent natural.completions) it might prevent convergence to guaranteed capacity.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.max_ignored_over_capacity</name>
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<value>0.1</value>
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</property>
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<property>
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<description>
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Given a computed preemption target, account for containers naturally expiring and preempt
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only this percentage of the delta. This determines the rate of geometric convergence into
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the deadzone (MAX_IGNORED_OVER_CAPACITY). For example, a termination factor of 0.5 will reclaim
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almost 95% of resources within 5 * #WAIT_TIME_BEFORE_KILL, even absent natural termination.
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</description>
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<name>yarn.resourcemanager.monitor.capacity.preemption.natural_termination_factor</name>
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<value>0.2</value>
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</property>
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<!-- Node Manager Configuration -->
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<property>
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