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  1. Hadoop Common
  2. HADOOP-3350

distcp should permit users to limit the number of maps

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.18.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      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. 3350-1.patch
          6 kB
          Chris Douglas
        2. 3350-0.patch
          2 kB
          Chris Douglas

          Activity

            People

            • Assignee:
              chris.douglas Chris Douglas
              Reporter:
              chris.douglas Chris Douglas
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              Dates

              • Created:
                Updated:
                Resolved: