Details

    • Type: Sub-task Sub-task
    • Status: Closed
    • Priority: Blocker Blocker
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.1
    • Component/s: mr-am, mrv2
    • Labels:
      None
    • Hadoop Flags:
      Reviewed
    • Release Note:
      Batching JobHistory flushing to DFS so that we don't flush for every event slowing down AM.

      Description

      The mr-am flushes each individual job history event to disk for AM recovery. The history even handler ends up with a significant backlog for tests like MAPREDUCE-3402.
      History events could be batched up based on num records / time / TaskFinishedEvents to reduce the number of DFS writes - with the potential drawback of having to rerun some tasks during AM recovery.

      1. MR3512.txt
        9 kB
        Siddharth Seth
      2. MR3512.txt
        25 kB
        Siddharth Seth
      3. MAPREDUCE-3512-20120111.txt
        25 kB
        Vinod Kumar Vavilapalli

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          People

          • Assignee:
            Siddharth Seth
            Reporter:
            Siddharth Seth
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            Dates

            • Created:
              Updated:
              Resolved:

              Development