Vitaly Brodetskyi created AMBARI-20821:
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Summary: Update default values for YARN preemption in Ambari
Key: AMBARI-20821
URL: https://issues.apache.org/jira/browse/AMBARI-20821
Project: Ambari
Issue Type: Bug
Components: ambari-server
Reporter: Vitaly Brodetskyi
Assignee: Vitaly Brodetskyi
Fix For: 2.5.1
Set 1)
"yarn.resourcemanager.monitor.capacity.preemption.total_preemption_per_round"
should >= 1 / #cluster-nodes. (For example, cluster has 20 nodes,
total_preemption_per_round should be at least 1 / 20 = 0.05. (By default this
is 0.1)
This really should be part of stack-advisor.
Set 2)
yarn.resourcemanager.monitor.capacity.preemption.natural_termination_factor = 1
(by default is 0.2).
The two configs will affect preemption for large containers like LLAP. We will
put these suggestions to documentation, but it will be also good if we can
update them in Ambari.
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