Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.21.0
    • Component/s: performance, task
    • Labels:
      None
    • Release Note:
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      Refactors shuffle code out of ReduceTask into separate classes in a new package(org.apache.hadoop.mapreduce.task.reduce)
      Incorporates MAPREDUCE-240, batches up several map output files from a TT to a reducer in a single transfer
      Introduces new Shuffle counters to keep track of shuffle errors
      Show
      Refactors shuffle code out of ReduceTask into separate classes in a new package(org.apache.hadoop.mapreduce.task.reduce) Incorporates MAPREDUCE-240 , batches up several map output files from a TT to a reducer in a single transfer Introduces new Shuffle counters to keep track of shuffle errors

      Description

      The reduce shuffle code has become very complex and entangled. I think we should move it out of ReduceTask and into a separate package (org.apache.hadoop.mapred.task.reduce). Details to follow.

        Attachments

        1. mapred-318-common.patch
          3 kB
          Jothi Padmanabhan
        2. mapred-318-3Sep-v1.patch
          243 kB
          Jothi Padmanabhan
        3. mapred-318-3Sep.patch
          242 kB
          Jothi Padmanabhan
        4. mapred-318-24Aug.patch
          239 kB
          Jothi Padmanabhan
        5. mapred-318-20Aug.patch
          234 kB
          Jothi Padmanabhan
        6. mapred-318-14Aug.patch
          233 kB
          Jothi Padmanabhan
        7. HADOOP-5233_part0.patch
          21 kB
          Arun C Murthy
        8. HADOOP-5233_api.patch
          12 kB
          Arun C Murthy

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              • Assignee:
                owen.omalley Owen O'Malley
                Reporter:
                owen.omalley Owen O'Malley
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                • Created:
                  Updated:
                  Resolved: