Develop simple map reduce application

Originally published at: http://www.itversity.com/lessons/hadoop-map-reduce-programming-101-06-develop-simple-map-reduce-application/

Overview of Map Reduce APIs Understand Map Reduce concepts Mapper is used to read the data from HDFS Mapper applies row level transformations on the data Mapper emits output in the form of Key Value tuples Mapper output will go through shuffle and sort phase and will become key and array of values These key…