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  1. Hadoop Common
  2. HADOOP-10048

LocalDirAllocator should avoid holding locks while accessing the filesystem

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.3.0
    • Fix Version/s: 2.8.0, 3.0.0-alpha1
    • Component/s: None
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      As noted in MAPREDUCE-5584 and HADOOP-7016, LocalDirAllocator can be a bottleneck for multithreaded setups like the ShuffleHandler. We should consider moving to a lockless design or minimizing the critical sections to a very small amount of time that does not involve I/O operations.

        Attachments

        1. HADOOP-10048.trunk.patch
          11 kB
          Yi Li
        2. HADOOP-10048.patch
          11 kB
          Jason Lowe
        3. HADOOP-10048.006.patch
          13 kB
          Jason Lowe
        4. HADOOP-10048.005.patch
          12 kB
          Jason Lowe
        5. HADOOP-10048.004.patch
          12 kB
          Jason Lowe
        6. HADOOP-10048.003.patch
          11 kB
          Yi Li

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              • Assignee:
                jlowe Jason Lowe
                Reporter:
                jlowe Jason Lowe
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: