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https://issues.apache.org/jira/browse/YARN-8016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16407267#comment-16407267
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Wangda Tan commented on YARN-8016:
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Thanks [~Zian Chen], a quick comment:
{code}
1004 private String buildQueueMappingRuleProperty (String
queueMappingSuffix) {
1005 StringBuilder queueMapping = new StringBuilder();
1006
queueMapping.append(QUEUE_MAPPING).append(".").append(queueMappingSuffix);
1007 return queueMapping.toString();
1008 }
{code}
Which makes per-policy-configuration load from
{{yarn.scheduler.capacity.queue-mappings.app-name.*}}
However, since the {{yarn.scheduler.capacity.queue-mappings}} is added because
of historical reason, it's only purpose is to support user-group mapping. I
think we should not override it.
So instead of using {{QUEUE_MAPPING}}, I prefer to change to use
{{YarnConfiguration#QUEUE_PLACEMENT_RULES}}, so the configuration becomes:
{code}
yarn.scheduler.queue-placement-rules.app-name.*
{code}
There's no need to change UserGroupMapping policy to read config from the new
name.
And I found in the CS.md, it doesn't mention
{{yarn.scheduler.queue-placement-rules}}, we should cleanup existing doc a bit,
maybe start a separate file and move all queue-mapping related topics to the
new file. Which can be done in a separate JIRA.
> Refine PlacementRule interface and add a app-name queue mapping rule as an
> example
> ----------------------------------------------------------------------------------
>
> Key: YARN-8016
> URL: https://issues.apache.org/jira/browse/YARN-8016
> Project: Hadoop YARN
> Issue Type: Task
> Reporter: Zian Chen
> Assignee: Zian Chen
> Priority: Major
> Attachments: YARN-8016.001.patch, YARN-8016.002.patch,
> YARN-8016.003.patch
>
>
> After YARN-3635/YARN-6689, PlacementRule becomes a common interface which can
> be used by scheduler and can be dynamically updated by scheduler according to
> configs. There're some other works.
> - There's no way to initialize PlacementRule.
> - No example of PlacementRule except the user-group mapping one.
> This JIRA is targeted to refine PlacementRule interfaces and add another
> PlacementRule example.
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