[jira] [Created] (YARN-4218) Metric for resource*time that was preempted

["Chang Li (JIRA)" <ji...@apache.org>]

Chang Li created YARN-4218:
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             Summary: Metric for resource*time that was preempted
                 Key: YARN-4218
                 URL: https://issues.apache.org/jira/browse/YARN-4218
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Chang Li
            Assignee: Chang Li
         Attachments: YHADOOP-631.wip.patch

After YARN-415 we have the ability to track the resource*time footprint of a job and preemption metrics shows how many containers were preempted on a job. However we don't have a metric showing the resource*time footprint cost of preemption. In other words, we know how many containers were preempted but we don't have a good measure of how much work was lost as a result of preemption.
We should add this metric so we can analyze how much work preemption is costing on a grid and better track which jobs were heavily impacted by it. A job that has 100 containers preempted that only lasted a minute each and were very small is going to be less impacted than a job that only lost a single container but that container was huge and had been running for 3 days.



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