Sandy Ryza created YARN-624:
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Summary: Support gang scheduling in the AM RM protocol
Key: YARN-624
URL: https://issues.apache.org/jira/browse/YARN-624
Project: Hadoop YARN
Issue Type: Sub-task
Components: api, scheduler
Affects Versions: 2.0.4-alpha
Reporter: Sandy Ryza
Assignee: Sandy Ryza
Per discussion on YARN-392 and elsewhere, gang scheduling, in which a scheduler
runs a set of tasks when they can all be run at the same time, would be a
useful feature for YARN schedulers to support.
Currently, AMs can approximate this by holding on to containers until they get
all the ones they need. However, this lends itself to deadlocks when different
AMs are waiting on the same containers.
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