Maysam Yabandeh created YARN-2430: ------------------------------------- Summary: FairShareComparator: cache the results of getResourceUsage() Key: YARN-2430 URL: https://issues.apache.org/jira/browse/YARN-2430 Project: Hadoop YARN Issue Type: Improvement Reporter: Maysam Yabandeh Assignee: Maysam Yabandeh
The compare of FairShareComparator has 3 invocation of getResourceUsage per comparable object. In the case of queues, the implementation of getResourceUsage requires iterating over the apps and adding up their current usage. The compare method can reuse the result of getResourceUsage to reduce the load by third. However, to further reduce the load the result of getResourceUsage can be cached in FSLeafQueue. This would be more efficient since the invocation of compare method on each Comparable object is >= 1. -- This message was sent by Atlassian JIRA (v6.2#6252)