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  1. Hadoop Map/Reduce
  2. MAPREDUCE-2267

Parallelize reading of blocks within a stripe

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Won't Fix
    • Affects Version/s: 0.22.0
    • Fix Version/s: None
    • Component/s: contrib/raid
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      RAID code has several instances where several blocks of data have to be read to perform an operation. For example, computing a parity block requires reading the blocks of the source file. Similarly, generating a fixed block requires reading a parity block and the good blocks from the source file. These read operations proceed sequentially currently. RAID code should use a thread pool to increase the parallelism and thus reduce latency.

        Attachments

        1. MAPREDUCE-2267.1.patch
          36 kB
          Ramkumar Vadali
        2. MAPREDUCE-2267.2.patch
          47 kB
          Ramkumar Vadali
        3. MAPREDUCE-2267.3.patch
          49 kB
          Ramkumar Vadali
        4. MAPREDUCE-2267.4.patch
          49 kB
          Ramkumar Vadali
        5. MAPREDUCE-2267.patch
          34 kB
          Ramkumar Vadali

          Activity

            People

            • Assignee:
              rvadali Ramkumar Vadali
              Reporter:
              rvadali Ramkumar Vadali
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              Dates

              • Created:
                Updated:
                Resolved: