High-performance computing (HPC) for the past ten years has been
dominated by thousands of Linux servers connected by a uniform
networking infrastructure. The defining theme for an HPC cluster lies
in the uniformity of the cluster.
In my last article, I talked about how even though an individual Raspberry
Pi is not that redundant, two Pis are. I described how to set up two Raspberry
Pis as a fault-tolerant file server using the GlusterFS clustered