Building your own computational cluster server

[Dirk Broer]

By far the cheapest way to get introduced into building your own cluster server is via the good-old Raspberry Pi platform.

This is a Raspberry Pi 3+ Model B that has been fitted with a Cluster HAT Kit Zero, which enables to combine the Raspberry Pi 3+ with up to four Raspberry Pi Zero's.
Performance-wise this will not be impressive, but it doesn't break the bank and is meant to teach you all the ins and outs of cluster servers.
The next step would be to combine more capable Raspberry Pi's in a cluster, either by stacking full form Pi's, or by combining Raspberry Compute Modules.
It all depends on how much Raspberries you have to start with and how much money you are willing to spend on your cluster. And you don't need to stop at Raspberries: you can use nVidia Jetson Xavier NX modules too.