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From "Dmitry Lysnichenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-20821) Update default values for YARN preemption in Ambari
Date Fri, 21 Apr 2017 15:23:04 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-20821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15978922#comment-15978922
] 

Dmitry Lysnichenko commented on AMBARI-20821:
---------------------------------------------

+1

> 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
>
>         Attachments: AMBARI-20821_trunk.patch
>
>
> 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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