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one easy way to differentiate between Hadoop old api and new api is packages. old api packages are identifiable by mapred or to put it precisely subpackages of org.apache.hadoop.mapred package, new api packages are identifiable by mapreduce or to put precisely subpackages of org.apache.hadoop.mapreduce package.

In old api, Mapper and Reducer are interfaces while in new api classes. 

 

Rishi Yadav
04/25/2013 at 19:41
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