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  1. Hadoop Common
  2. HADOOP-10048

LocalDirAllocator should avoid holding locks while accessing the filesystem

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.3.0
    • 2.8.0, 3.0.0-alpha1
    • None
    • None
    • 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-10048.006.patch
          13 kB
          Jason Darrell Lowe
        2. HADOOP-10048.005.patch
          12 kB
          Jason Darrell Lowe
        3. HADOOP-10048.004.patch
          12 kB
          Jason Darrell Lowe
        4. HADOOP-10048.003.patch
          11 kB
          Yi Li
        5. HADOOP-10048.trunk.patch
          11 kB
          Yi Li
        6. HADOOP-10048.patch
          11 kB
          Jason Darrell Lowe

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              jlowe Jason Darrell Lowe
              jlowe Jason Darrell Lowe
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              Dates

                Created:
                Updated:
                Resolved: