[jira] [Created] (YARN-5030) Revisit o.a.h.y.s.rm.scheduler.ResourceUsage

["Karthik Kambatla (JIRA)" <ji...@apache.org>]

Karthik Kambatla created YARN-5030:
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             Summary: Revisit o.a.h.y.s.rm.scheduler.ResourceUsage
                 Key: YARN-5030
                 URL: https://issues.apache.org/jira/browse/YARN-5030
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
            Reporter: Karthik Kambatla


YARN-3092 introduced ResourceUsage class to track a number of things around resources. The naming is a little ambiguous and hence less conducive to being used elsewhere. 
# UsageByLabel doesn't need to be label specific. A more descriptive name (TenantResourceTracker) might be more apt - since the class tracks more than just usage. 
# Accordingly, ResourceUsage itself can be renamed to more descriptive (and less ambiguous) to LabelWiseTenantResourceTracker or some such. 
# TenantResourceTracker (previously UsageByLabel) should probably be a class on its own, and the private ResourceType should be part of it instead of the mapping against labels.
# Ideally, would like for the names to say allocation to capture allocation instead of usage. 



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