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  1. Hadoop Common
  2. HADOOP-2771

changing the number of reduces dramatically changes the time of the map time

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.17.1
    • Fix Version/s: 0.20.0
    • Component/s: None
    • Labels:
      None

      Description

      By changing the number of reduces, the time for an individual map changes radically. By running the same program and data with different numbers of reduces (2500, 7500, 25000) the times for each map changed radically (0:50, 1:20, 5h).

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