MapReduce in Hadoop
After installing Hadoop you will go for MapReduce operations or Hive NoSQL implementation. Here I am going to demonstrate two mapreduce application already provided in hadoop to test the architecture which will help you getting familiar with it. First one is calculating value of Pi and other one is running Terasort test. 1. Calculate value of Pi. Hadoop jar /root/ Downloads/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.0.jar pi 2 10