Sandy Ryza created YARN-736:
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Summary: Add a multi-resource fair sharing metric
Key: YARN-736
URL: https://issues.apache.org/jira/browse/YARN-736
Project: Hadoop YARN
Issue Type: Improvement
Components: scheduler
Affects Versions: 2.0.4-alpha
Reporter: Sandy Ryza
Assignee: Sandy Ryza
Currently, at a regular interval, the fair scheduler computes a fair memory
share for each queue and application inside it. This fair share is not used
for scheduling decisions, but is displayed in the web UI, exposed as a metric,
and used for preemption decisions.
With DRF and multi-resource scheduling, assigning a memory share as the fair
share metric to every queue no longer makes sense. It's not obvious what the
replacement should be, but probably something like fractional fairness within a
queue, or distance from an ideal cluster state.
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