Roni Burd created YARN-6351:
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Summary: Have RM match relaxedLocality request via time instead of
missedOpportunities
Key: YARN-6351
URL: https://issues.apache.org/jira/browse/YARN-6351
Project: Hadoop YARN
Issue Type: Improvement
Components: capacityscheduler, yarn
Reporter: Roni Burd
When using relaxLocality=true, the current CapacityScheduler strategy is to
wait a certain amount of missedOpportunities to schedule a request in a node, a
rack or off_switch. This means that the missedOpportunities param is dependent
on the number of nodes in the cluster and the duration of each container.
A different strategy would be to wait a configurable amount of time before
deciding to go to different location.
This JIRA proposal is to extract the current behavior into a pluggable strategy
pattern and create a new strategy that is simply based on time.
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