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  1. Hadoop Map/Reduce
  2. MAPREDUCE-2340

optimize JobInProgress.initTasks()

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    Details

    • Type: Improvement
    • Status: Patch Available
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 0.20.1, 0.21.0
    • Fix Version/s: None
    • Component/s: jobtracker

      Description

      JobTracker's hostnameToNodeMap cache can speed up JobInProgress.initTasks() and JobInProgress.createCache() significantly. A test for 1 job with 100000 maps on a 2400 cluster shows nearly 10 and 50 times speed up for initTasks() and createCache().

        Attachments

        1. MAPREDUCE-2340.patch
          0.7 kB
          Kang Xiao
        2. MAPREDUCE-2340.patch
          0.7 kB
          Kang Xiao
        3. MAPREDUCE-2340.r1.diff
          0.7 kB
          Harsh J
        4. MAPREDUCE-2340-branch-1.4.patch
          1 kB
          Sean Busbey

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            People

            • Assignee:
              Unassigned
              Reporter:
              xiaokang Kang Xiao
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              Dates

              • Created:
                Updated: