[jira] [Created] (MESOS-1086) DRF allocator should take into account past allocations when determining an ordering so frameworks are not starved.

["Benjamin Hindman (JIRA)" <ji...@apache.org>]

Benjamin Hindman created MESOS-1086:
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             Summary: DRF allocator should take into account past allocations when determining an ordering so frameworks are not starved.
                 Key: MESOS-1086
                 URL: https://issues.apache.org/jira/browse/MESOS-1086
             Project: Mesos
          Issue Type: Bug
          Components: master
            Reporter: Benjamin Hindman
            Priority: Critical


The DRF allocator (master/drf_sorter.hpp|cpp) currently only uses a framework's share to determine an ordering for allocating resources. When there are very few resources to go around it's possible that a framework will get allocated resources (making it have a dominant share larger than others), use those resources, then return those resources (making it's dominant share equal to the share of others), and then get reallocated the resources _again_ because its dominant share is equal to others. This can cause starvation for frameworks.



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