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  1. Hadoop Map/Reduce
  2. MAPREDUCE-3902

MR AM should reuse containers for map tasks, there-by allowing fine-grained control on num-maps for users without need for CombineFileInputFormat etc.

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • applicationmaster, mrv2
    • None

    Description

      The MR AM is now in a great position to reuse containers across (map) tasks. This is something similar to JVM re-use we had in 0.20.x, but in a significantly better manner:

      1. Consider data-locality when re-using containers
      2. Consider the new shuffle - ensure that reduces fetch output of the whole container at once (i.e. all maps) : MAPREDUCE-4525

      Attachments

        1. MAPREDUCE-3902.patch
          74 kB
          Arun Murthy
        2. MAPREDUCE-3902.2.patch
          55 kB
          Tsuyoshi Ozawa
        3. AM_ContainerRefactor.pdf
          151 kB
          Siddharth Seth
        4. AMContainerRefactorNotes.pdf
          58 kB
          Siddharth Seth

        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. YARN-75 RMContainer should handle a RELEASE event while RUNNING

          • Major - Major loss of function.
          • Closed
          is related to

          Sub-task - The sub-task of the issue MAPREDUCE-4525 Combiner per node

          • Major - Major loss of function.
          • Open
          relates to

          Task - A task that needs to be done. MAPREDUCE-4596 Split StateMachine state from states seen by MRClientProtocol (for Job, Task, TaskAttempt)

          • Major - Major loss of function.
          • Closed

          Activity

            People

              rkannan82 Kannan Rajah
              acmurthy Arun Murthy
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              Dates

                Created:
                Updated: