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https://issues.apache.org/jira/browse/YARN-1011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15155867#comment-15155867
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Bikas Saha commented on YARN-1011:
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2.3. Whats the reasoning behind this? Over-allocating a node seems to be a
local decision based on the nodes expected and actual utilization. So I would
expect the logic to be something similar to 1) Node is already 100% allocated
2) Actual utilization is < 80% 3) Over-allocate to bring actual utilization
~=80%.
3. What is the AM/RM interaction in this promotion?
3.2. Not clear what is actually happening here? Will new container be allocated
and the opportunistic container allowed to continue till is exits or is
preempted?
How does all this interact with preemption?
> [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,
> yarn-1011-design-v2.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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