## Subtitled: Mistakes I may have Allegedly Made 25 years ago I designed my first resilient system, addressing failures with networks, infrastructure, applications, operator errors, and with a considerable dose of youthful hubris and ignorance. I'm still building them today. This talk covers the journey, the lessons, and current practice for building robust & resilient systems, that don't need to wake you up when they go bump in the night. It has a sprinkling of humour, of war stories, of operations, and some computer science theory. This talk comprises 7 main themes, presented as a journey from your typical single server deployment, through to a modern distributed system spanning continents, multiple servers & applications.