Hadoop Map/Reduce
  1. Hadoop Map/Reduce
  2. MAPREDUCE-2931

CLONE - LocalJobRunner should support parallel mapper execution

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.2.0
    • Component/s: None
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      The LocalJobRunner currently supports only a single execution thread. Given the prevalence of multi-core CPUs, it makes sense to allow users to run multiple tasks in parallel for improved performance on small (local-only) jobs.

      It is necessary to patch back MAPREDUCE-1367 into Hadoop 0.20.X version. Also, MapReduce-434 should be submitted together.

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            • Assignee:
              Sandy Ryza
              Reporter:
              Forest Tan
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              • Created:
                Updated:
                Resolved:

                Development