mapred.map.tasks and mapred.reduce.tasks should be determined automatically by
default
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Key: HADOOP-3097
URL: https://issues.apache.org/jira/browse/HADOOP-3097
Project: Hadoop Core
Issue Type: New Feature
Components: mapred
Reporter: Doug Cutting
The default values for mapred.map.tasks and mapred.reduce.tasks should be empty
or -1, signalling that the framework should use an dynamically-determined
default. An appropriate default is perhaps the number of map and reduce slots
in the cluster, since FileInputFormat interprets mapred.map.tasks as a minimum.
This would remove a common area of misconfiguration.
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