Differences Between Old and New MR API
Recently Hadoop new version 2.6.0 has released into Market,Actually Hadoop versions are released in 3 stages 0.x.xx,1.x.xx and 2.x.x,Up to Hadoop 0.20 All packages are In Old API (Mapred) From Hadoop 0.21 All packages are in New API (Mapreduce).
Example of New Mapreduce Api is org.apache.hadoop.mapreduce
Example of Old Mapreduce API is org.apache.hadoop.mapred
So This is the Main Differences Between Old and New MR API