I want to build a network cluster with a set of Raspberry Pi nodes.
This is a fun/educational project about how a cluster work and how to solve some toy problems.
This idea is popping up in my mind from time to time, but there was no extremely cheap candidate computer for such a project around. $99 per node is no option and I want the nodes to be independend from powergrid (if there is less power - rund fewer nodes).
I still have to find
small toy problems to solve besides raytracing, image filtering, fractales
a cluster software which can work with the given limitations of RAM, disk space, etc.