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Klaus Ma updated MESOS-2930: ---------------------------- Assignee: (was: Klaus Ma) > 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 > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)