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https://issues.apache.org/jira/browse/YARN-4285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15209449#comment-15209449
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Wangda Tan commented on YARN-4285:
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[~jianhe],
bq. However, the queue's used resource in the UI does include reserved resource
too.
IIUC, it should queue's used resource should include reserved resources
[~vvasudev],
bq. it makes sense to remove reserved resources from the used resources,
Actually I think we should include reserved resources by used resources, unless
we can show them together on UI. See my [#2
comment|https://issues.apache.org/jira/browse/YARN-4678?focusedCommentId=15209365&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15209365].
bq. ...but do we know why we counted reserved resources as part of used
resources in the first place?
The reason is, if we create a reserved container under a queue, we need to make
sure it doesn't go beyond queue's max capacity. In another word, if resource is
reserved by someone, nobody else can use that part of resources.
>From YARN's perspective, a queue has 99G allocated (not reserved) + 1G
>reserved is as same as 1G allocated + 99G reserved. To be more transparent to
>users and avoid answer questions like: "why my total allocated resource is
>always less than total resources, used resource should be allocated + reserved.
> Display resource usage as percentage of queue and cluster in the RM UI
> ----------------------------------------------------------------------
>
> Key: YARN-4285
> URL: https://issues.apache.org/jira/browse/YARN-4285
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Varun Vasudev
> Assignee: Varun Vasudev
> Fix For: 2.8.0
>
> Attachments: YARN-4285.001.patch, YARN-4285.002.patch,
> YARN-4285.003.patch, YARN-4285.004.patch
>
>
> Currently, we display the memory and vcores allocated to an app in the RM UI.
> It would be useful to display the resources consumed as a %of the queue and
> the cluster to identify apps that are using a lot of resources.
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