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https://issues.apache.org/jira/browse/YARN-5215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15364765#comment-15364765
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Karthik Kambatla commented on YARN-5215:
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Spoke to Inigo offline at the summit.
My primary concern is with assuming unused resources on the node can be used by
YARN. It is not uncommon for users to be running something else besides YARN on
the worker nodes. While these external processes might not be using any
resources at the time, they might be high-priority workloads that need to be
able to use those resources immediately.
> Scheduling containers based on external load in the servers
> -----------------------------------------------------------
>
> Key: YARN-5215
> URL: https://issues.apache.org/jira/browse/YARN-5215
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Inigo Goiri
> Attachments: YARN-5215.000.patch, YARN-5215.001.patch
>
>
> Currently YARN runs containers in the servers assuming that they own all the
> resources. The proposal is to use the utilization information in the node and
> the containers to estimate how much is consumed by external processes and
> schedule based on this estimation.
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