Here's you some examples to learn from. Most are old enough that patents have expired: Why Do Computers Stop and What Can Be Done About It? (1985) https://www.

Here's you some examples to learn from. Most are old enough that patents have expired: Why Do Computers Stop and What Can Be Done About It? (1985) https://www.hpl.hp.com/techreports/tandem/TR-85.7.pdf https://www.hpl.hp.com/techreports/tandem/TR-85.7.pdf Their NonStop Architecture https://www.hpl.hp.com/techreports/tandem/TR-86.2.pdf https://www.hpl.hp.com/techreports/tandem/TR-86.2.pdf QNX's systems are ultra-reliable, too https://cseweb.ucsd.edu/~voelker/cse221/papers/qnx-paper92.pdf https://cseweb.ucsd.edu/~voelker/cse221/papers/qnx-paper92.p... OpenVMS clusters' uptime was years to decades & mixed CPU ISA's https://en.wikipedia.org/wiki/VMScluster https://en.wikipedia.org/wiki/VMScluster Systems that run forever and self-heal (Armstrong) https://www.youtube.com/watch?v=cNICGEwmXLU https://www.youtube.com/watch?v=cNICGEwmXLU Microreboots https://dslab.epfl.ch/pubs/microreboot.pdf https://dslab.epfl.ch/pubs/microreboot.pdf Minix 3: Microkernel-based, self-healing, POSIX OS https://www.youtube.com/watch?v=bx3KuE7UjGA https://www.youtube.com/watch?v=bx3KuE7UjGA