Alejandro Abdelnur created YARN-1010:
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Summary: FairScheduler: decouple container scheduling from
nodemanager heartbeats
Key: YARN-1010
URL: https://issues.apache.org/jira/browse/YARN-1010
Project: Hadoop YARN
Issue Type: Improvement
Components: scheduler
Affects Versions: 2.1.0-beta
Reporter: Alejandro Abdelnur
Assignee: Alejandro Abdelnur
Priority: Critical
Currently scheduling for a node is done when a node heartbeats.
For large cluster where the heartbeat interval is set to several seconds this
delays scheduling of incoming allocations significantly.
We could have a continuous loop scanning all nodes and doing scheduling. If
there is availability AMs will get the allocation in the next heartbeat after
the one that placed the request.
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