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https://issues.apache.org/jira/browse/YARN-1011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082305#comment-15082305
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Subru Krishnan commented on YARN-1011:
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[~kasha], I had an offline discussion with [~curino] and [~chris.douglas]
regarding auto promotion by NM. To be aligned with YARN-2877, we feel it will
be good if NM can express it's preference to the RM and let the RM make the
decision as only it can ensure the global invariants based on the current state
of the cluster. The preference can be based on whether the opportunistic
container has been started or not, it's resources have been localized or not,
how long it has been running, how much progress it has made, etc.
> [Umbrella] Schedule containers based on utilization of currently allocated
> containers
> -------------------------------------------------------------------------------------
>
> Key: YARN-1011
> URL: https://issues.apache.org/jira/browse/YARN-1011
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Arun C Murthy
> Attachments: yarn-1011-design-v0.pdf, yarn-1011-design-v1.pdf
>
>
> Currently RM allocates containers and assumes resources allocated are
> utilized.
> RM can, and should, get to a point where it measures utilization of allocated
> containers and, if appropriate, allocate more (speculative?) containers.
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