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https://issues.apache.org/jira/browse/MESOS-2930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14804942#comment-14804942
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Klaus Ma edited comment on MESOS-2930 at 9/18/15 1:48 PM:
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I'm thinking to use this to adjust resources dynamically, for example, if
hardware changed, we gonna increase or decrease accordingly without restarting
the slave. And if user over commit tasks, it's also a good option to avoid host
failure in cluster.
[~bmahler], any comments for this?
was (Author: klaus1982):
i'm thinking to use this to adjust resources dynamcally, for example, if
hardware changed, we gonna increase or decrease accordingly without restarting
the slave.
> Allow the Resource Estimator to express over-allocation of revocable
> resources.
> -------------------------------------------------------------------------------
>
> Key: MESOS-2930
> URL: https://issues.apache.org/jira/browse/MESOS-2930
> Project: Mesos
> Issue Type: Improvement
> Components: slave
> Reporter: Benjamin Mahler
> Assignee: Klaus Ma
>
> Currently the resource estimator returns the amount of oversubscription
> resources that are available, since resources cannot be negative, this allows
> the resource estimator to express the following:
> (1) Return empty resources: We are fully allocated for oversubscription
> resources.
> (2) Return non-empty resources: We are under-allocated for oversubscription
> resources. In other words, some are available.
> However, there is an additional situation that we cannot express:
> (3) Analogous to returning non-empty "negative" resources: We are
> over-allocated for oversubscription resources. Do not re-offer any of the
> over-allocated oversubscription resources that are recovered.
> Without (3), the slave can only shrink the total pool of oversubscription
> resources by returning (1) as resources are recovered, until the pool is
> shrunk to the desired size. However, this approach is only best-effort, it's
> possible for a framework to launch more tasks in the window of time (15
> seconds by default) that the slave polls the estimator.
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