Tag Archives: setNumMapTasks()

Changing MapReduce number of Mappers in Hadoop .20.2

In earlier releases of Hadoop you could change the number of mappers by setting: setNumMapTasks() You did this using JobConf.  Things in Hadoop .20.2 have migrated to using the Job class instead of JobConf.  Although setNumReduceTasks() is still valid, setNumMapTasks() … Continue reading

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