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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-424) Allow resource requests to provide hints to the scheduler
Date Mon, 25 Feb 2013 09:18:13 GMT
Sandy Ryza created YARN-424:

             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

To avoid placing complex scheduling expectations on the RM, the restrictions on hints would
* 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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