Accept that there is a Hadoop Cluster that has 20 machines. Out of those 20 machines 18 machines are slaves and machine 19 is for NameNode and machine 20 is for JobTracker.
Presently I realize that hadoop programming must be introduced in every one of those 20 machines.
be that as it may, my inquiry is which machine is included to stack a record xyz.txt in to Hadoop Cluster. Is that customer machine a different machine . Do we have to introduce Hadoop programming in that clinet machine also. How does the customer machine identifes Hadoop group?