Arun Suresh created YARN-7839:
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Summary: Check node capacity before placing in the Algorithm
Key: YARN-7839
URL: https://issues.apache.org/jira/browse/YARN-7839
Project: Hadoop YARN
Issue Type: Sub-task
Reporter: Arun Suresh
Currently, the Algorithm assigns a node to a requests purely based on if the
constraints are met. It is later in the scheduling phase that the Queue
capacity and Node capacity are checked. If the request cannot be placed because
of unavailable Queue/Node capacity, the request is retried by the Algorithm.
For clusters that are running at high utilization, we can reduce the retries if
we perform the Node capacity check in the Algorithm as well. The Queue capacity
check can still be handled by the scheduler (since queues are tied to the
scheduler)
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