changing the number of reduces dramatically changes the time of the map time
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Key: HADOOP-2771
URL: https://issues.apache.org/jira/browse/HADOOP-2771
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Owen O'Malley
Fix For: 0.16.1
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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