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https://issues.apache.org/jira/browse/YARN-7708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16370783#comment-16370783
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Young Chen commented on YARN-7708:
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This patch introduces the LoadBasedGlobalPolicy. It's configurable in the
following ways:
* MAX_EDIT: The maximum number of sub clusters this policy will throttle. The
top N clusters by pending load will have their policy weights scaled down.
* MIN_PENDING: The minimum number of pending applications before a sub cluster
weight qualifies for editing.
* MAX_PENDING: The maximum number of pending applications in the scalable
range. Sub clusters exceeding this will have their policy weights set to
MIN_WEIGHT
* MIN_WEIGHT: The minimum weight possible for a highly loaded sub cluster.
* SCALING: The scaling method that maps pending load to sub cluster policy
weight. Currently there are three scaling methods: quadratic, log, and linear.
> [GPG] Load based policy generator
> ---------------------------------
>
> Key: YARN-7708
> URL: https://issues.apache.org/jira/browse/YARN-7708
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Carlo Curino
> Assignee: Young Chen
> Priority: Major
> Attachments: YARN-7708-YARN-7402.01.cumulative.patch
>
>
> This policy reads load from the "pendingQueueLength" metrics and provides
> scaling into a set of weights that influence the AMRMProxy and Router
> behaviors.
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