Building an Inexpensive, Powerful Parallel Machine and Using It for Numerical Simulations (Linux Journal)
Jobs on any node are started from the master node, which is the only login place in the entire cluster. Scyld Beowulf software creates an illusion of a single computer (master node) with many CPUs (those of slave nodes). Monitoring slave nodes from the master node is easy with a graphical beostatus utility or simply with top."
