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  1. Mesos
  2. MESOS-8026

Satisfy quota guarantees evenly across roles.

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      Description

      Currently, quota is allocated based DRF sorting of the roles based on the role's cluster-wide allocation. This strategy is in place to attempt to allocate quota in a fair manner. However, it is ill-fitted to quota, since quota bears no connection to a fair share of the overall cluster. Rather, a more appropriate notion of fairness of quota, would be a DRF of the roles based on the role's share of its quota.

      For example:

      small_role: quota = [10,20,30]
      large_role: quota = [100,200,300]
      
      both have allocation of [0,0,0] with dominant share of 0.
      
      allocate to small_role [1,2,3], small role now has dominant share of 0.1.
      
      allocate to large_role [1,2,3], large role now has dominant share 0.01,
      allocate to large_role [2,4,6], large role now has dominant share 0.02,
      ...
      allocate to large_role [10,20,30], large role now has dominant share 0.1.
      
      now small_role and large_role are tied again, repeat.
      

      This strategy attempts to evenly satisfy quota across the roles. In this example, since large_role has 10x the quota as small_role, it receives resources in a 10:1 ratio compared to small_role.

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            • Assignee:
              Unassigned
              Reporter:
              bmahler Benjamin Mahler
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              • Created:
                Updated: