Linux Magazine: The Coming of Diskless Clusters

“With advances in many facets of networking, diskless clusters
are now quite practical. Better yet, nodes without local storage
are cheaper to build and cheaper to maintain. Here’s a survey of
the relevant technologies and techniques.

“The world of clusters is fun and unique because there are so
many ways to customize the design and implementation of your
cluster. One design that’s becoming increasingly popular is the
diskless cluster–that is a cluster with no hard drives in the
compute nodes…”