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  1. Hadoop Map/Reduce
  2. MAPREDUCE-3561 [Umbrella ticket] Performance issues in YARN+MR
  3. MAPREDUCE-3641

CapacityScheduler should be more conservative assigning off-switch requests

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    Details

    • Type: Sub-task
    • Status: Closed
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.1
    • Component/s: mrv2, scheduler
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed
    • Release Note:
      Making CapacityScheduler more conservative so as to assign only one off-switch container in a single scheduling iteration.

      Description

      In hadoop-1, the CS is very conservative handing out off-switch assignments, we need to do the same in YARN.

      We noticed performance regressions due to this, particularly for reduces.

        Attachments

        1. MAPREDUCE-3641.patch
          29 kB
          Arun Murthy
        2. MAPREDUCE-3641.patch
          18 kB
          Arun Murthy
        3. MAPREDUCE-3641.patch
          17 kB
          Arun Murthy
        4. MAPREDUCE-3641.patch
          13 kB
          Arun Murthy

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            • Assignee:
              acmurthy Arun Murthy
              Reporter:
              acmurthy Arun Murthy

              Dates

              • Created:
                Updated:
                Resolved:

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