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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