Uploaded image for project: 'Hadoop Map/Reduce'
  1. Hadoop Map/Reduce
  2. MAPREDUCE-516

Fix the 'cluster drain' problem in the Capacity Scheduler wrt High RAM Jobs



    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.20.1
    • Fix Version/s: 0.21.0
    • Component/s: None
    • Labels:
    • Hadoop Flags:
      Incompatible change, Reviewed


      When a HighRAMJob turns up at the head of the queue, the current implementation of support for HighRAMJobs in the Capacity Scheduler has problem in that the scheduler stops assigning tasks to all TaskTrackers in the cluster until a HighRAMJob finds a suitable TaskTrackers for all its tasks.

      This causes a severe utilization problem since effectively no new tasks are allowed to run until the HighRAMJob (at the head of the queue) gets slots.


        1. mr516-ydist.patch
          170 kB
          Sreekanth Ramakrishnan
        2. MAPREDUCE-516-Y20.patch
          170 kB
          Sreekanth Ramakrishnan
        3. HADOOP-5964-12.patch
          168 kB
          Hemanth Yamijala
        4. HADOOP-5964-11.patch
          165 kB
          Hemanth Yamijala
        5. HADOOP-5964_9_20090619.patch
          164 kB
          Arun Murthy
        6. HADOOP-5964_9_20090619.patch
          163 kB
          Arun Murthy
        7. HADOOP-5964_8_20090618.patch
          163 kB
          Arun Murthy
        8. HADOOP-5964_7_20090618.patch
          148 kB
          Arun Murthy
        9. HADOOP-5964_6_20090617.patch
          145 kB
          Arun Murthy
        10. HADOOP-5964_4_20090615.patch
          84 kB
          Arun Murthy
        11. HADOOP-5964_2_20090629_yhadoop.patch
          170 kB
          Arun Murthy
        12. HADOOP-5964_2_20090629_yhadoop.patch
          170 kB
          Arun Murthy
        13. HADOOP-5964_2_20090609.patch
          68 kB
          Arun Murthy
        14. HADOOP-5964_11_20090623.patch
          174 kB
          Arun Murthy
        15. HADOOP-5964_10_20090622.patch
          162 kB
          Arun Murthy
        16. HADOOP-5964_1_20090623_yhadoop.patch
          170 kB
          Arun Murthy
        17. HADOOP-5964_1_20090608.patch
          54 kB
          Arun Murthy
        18. HADOOP-5964_0_20090602.patch
          31 kB
          Arun Murthy

          Issue Links



              • Assignee:
                acmurthy Arun Murthy
                acmurthy Arun Murthy
              • Votes:
                0 Vote for this issue
                10 Start watching this issue


                • Created: