We don’t do any calculation part in driver program. The
driver program mainly use to
1.
Set Hadoop Configuration.
2.
Set Job.
3.
Include FileSystem.
4.
Specify the input file path and output file
path.
5.
Make the jar file of the main class because
Hadoop can only work on jar files .
6.
Specify Map output key class, Map output value
class.
7.
Specify Reduce output key class, Reduce output
value class.
8.
Define the path of Mapper derived class and Reducer
derived class.
9.
Waits until the job is completed.