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From "Qian Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-4392) Balance quota frameworks with non-quota, greedy frameworks.
Date Mon, 18 Jan 2016 23:55:39 GMT

    [ https://issues.apache.org/jira/browse/MESOS-4392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15105989#comment-15105989
] 

Qian Zhang commented on MESOS-4392:
-----------------------------------

Agree. The focus of this ticket should be how to lend out the unused resources within quota
guarantee and revoke them back when needed. Quota limit should not be the focus at least for
now.

> Balance quota frameworks with non-quota, greedy frameworks.
> -----------------------------------------------------------
>
>                 Key: MESOS-4392
>                 URL: https://issues.apache.org/jira/browse/MESOS-4392
>             Project: Mesos
>          Issue Type: Epic
>          Components: allocation, master
>            Reporter: Bernd Mathiske
>            Assignee: Alexander Rukletsov
>              Labels: mesosphere
>
> Maximize resource utilization and minimize starvation risk for both quota frameworks
and non-quota, greedy frameworks when competing with each other.
> A greedy analytics batch system wants to use as much of the cluster as possible to maximize
computational throughput. When a competing web service with fixed task size starts up, there
must be sufficient resources to run it immediately. The operator can reserve these resources
by setting quota. However, if these resources are kept idle until the service is in use, this
is wasteful from the analytics job's point of view. On the other hand, the analytics job should
hand back reserved resources to the service when needed to avoid starvation of the latter.
> We can assume that often, the resources needed by the service will be of the non-revocable
variety. Here we need to introduce clearer distinctions between oversubscribed and revocable
resources that are not oversubscribed. An oversubscribed resource cannot be converted into
a non-revocable resource, not even by preemption. In contrast, a non-oversubscribed, revocable
resource can be converted into a non-revocable resource.
> Another related topic is optimistic offers. The pertinent aspect in this context is again
whether resources are oversubscribed or not.



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