Sandy Ryza created YARN-424:
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Summary: Allow resource requests to provide hints to the scheduler
Key: YARN-424
URL: https://issues.apache.org/jira/browse/YARN-424
Project: Hadoop YARN
Issue Type: Improvement
Components: api, applications, scheduler
Affects Versions: 2.0.3-alpha
Reporter: Sandy Ryza
Assignee: Sandy Ryza
As initially discussed on YARN-392, it would be helpful for the allocate
protocol to be able to include hints to the scheduler. Examples hints could
include deadlines (containers needed by a certain time) or gangs (resources
that should be scheduled at the same time or not at all).
To avoid placing complex scheduling expectations on the RM, the restrictions on
hints would be:
* Any scheduler may ignore any subset of hints. That is, applications must be
written to handle resource requests as if their hints don't exist.
* Must be bounded in length - perhaps no larger than 16 bytes or 100 characters.
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