Tao Yang created YARN-7005:
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Summary: Skip unnecessary sorting and iterating process for child
queues without pending resource to optimize schedule performance
Key: YARN-7005
URL: https://issues.apache.org/jira/browse/YARN-7005
Project: Hadoop YARN
Issue Type: Improvement
Affects Versions: 3.0.0-alpha4, 2.9.0
Reporter: Tao Yang
Nowadays even if there is only one pending app in a queue, the scheduling
process will go through all queues anyway and costs most of time on sorting and
iterating child queues in ParentQueue#assignContainersToChildQueues.
IIUIC, queues that have no pending resource can be skipped for sorting and
iterating process to reduce time cost, obviously for a cluster with many
queues. Please feel free to correct me if I ignore something else. Thanks.
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