Wangda Tan created YARN-4433:
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             Summary: Minimum and increment capacity support should be moved to 
AbstractYarnScheduler
                 Key: YARN-4433
                 URL: https://issues.apache.org/jira/browse/YARN-4433
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Wangda Tan
            Assignee: Wangda Tan


Currently, only FairScheduler supports increment capacity different from 
minimum capacity, it will be useful if we can support this feature in other 
schedulers.

Default behavior of minimum/increment resources:
- Minimum-allocation should > 0
- Minimum-allocation should be multiple times of increment (to avoid resource 
fragmentation).

Different scheduler implementation can overwrite this behavior.

With this we can have a more fine-grained granularity of resources allocation. 
(In existing CapacityScheduler without this feature, if minimum-allocation set 
to 5G, you can only get 5G, 10G, .... With this feature, if you have 
minimum-allocation set to 5G, and increment-allocation set to 1G, you can ask 
5G, 6G, 7G...)



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