Anubhav Dhoot created YARN-3920:
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Summary: FairScheduler Reserving a node for a container should be
configurable to allow it used only for large containers
Key: YARN-3920
URL: https://issues.apache.org/jira/browse/YARN-3920
Project: Hadoop YARN
Issue Type: Improvement
Components: fairscheduler
Reporter: Anubhav Dhoot
Assignee: Anubhav Dhoot
Reserving a node for a container was designed for preventing large containers
from starvation from small requests that keep getting into a node. Today we let
this be used even for a small container request. This has a huge impact on
scheduling since we block other scheduling requests until that reservation is
fulfilled. We should make this configurable so its impact can be minimized by
limiting it for large container requests as originally intended.
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