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  1. Hadoop Common
  2. HADOOP-3350

distcp should permit users to limit the number of maps

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.18.0
    • None
    • None
    • Reviewed

    Description

      distcp provides no user-configurable setting to affect the number of maps run during a copy. For large clusters, the current calculation- min(#bytes / 256MB, #nodes * 20)- can be overly aggressive.

      Attachments

        1. 3350-0.patch
          2 kB
          Christopher Douglas
        2. 3350-1.patch
          6 kB
          Christopher Douglas

        Activity

          People

            cdouglas Christopher Douglas
            cdouglas Christopher Douglas
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            Dates

              Created:
              Updated:
              Resolved: