Installing a Hadoop cluster typically involves unpacking the software on all the machines in the cluster or installing it via a packaging system as appropriate for your operating system. It is important to divide up the hardware into functions. Typically one machin…

MRv1 daemon • Namenode • Secondary namenode • Jobtracker • Datanode • Tasktracker The jobtracker daemon had these two parts tightly coupled within itself and was responsible for managing the tasks and all its related operations by interacting with th…