Hadoop Common
  1. Hadoop Common
  2. HADOOP-4789

Change fair scheduler to share between pools by default, not between invidual jobs

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Minor Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.20.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Incompatible change, Reviewed
    • Release Note:
      Changed fair scheduler to divide resources equally between pools, not jobs.

      Description

      The fair scheduler currently treats jobs as equal entities in sharing by default, so that a user who submits 2 jobs gets 2x the share of a user who submits only 1 job. We found that it makes more sense to support equal shares between individual pools instead, and have one pool per user, because users can otherwise game the system by submitting multiple small jobs. This patch will set the scheduler to share between pools by default and set the default pool assignment process to one pool per user. it will also be possible to give weights to pools so that some users/groups/applications get a larger share of the cluster if they really do need to run more jobs.

        Activity

          People

          • Assignee:
            Matei Zaharia
            Reporter:
            Matei Zaharia
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            Dates

            • Created:
              Updated:
              Resolved:

              Development