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  1. Hadoop Map/Reduce
  2. MAPREDUCE-2239

BlockPlacementPolicyRaid should call getBlockLocations only when necessary

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.0
    • Fix Version/s: 0.23.0
    • Component/s: contrib/raid
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently BlockPlacementPolicyRaid calls getBlockLocations for every chooseTarget().
      This puts pressure on NameNode. We should avoid calling if this file is not raided or a parity file.

        Attachments

        1. MAPREDUCE-2239.txt
          16 kB
          Scott Chen
        2. MAPREDUCE-2239-1.txt
          16 kB
          Scott Chen
        3. MAPREDUCE-2239-2.txt
          14 kB
          Scott Chen
        4. MAPREDUCE-2239-3.txt
          15 kB
          Scott Chen

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            People

            • Assignee:
              schen Scott Chen
              Reporter:
              schen Scott Chen
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              Dates

              • Created:
                Updated:
                Resolved: