Two Hard Problems with Distributed Systems

I wrote this joke exactly 10 years ago: There are only two hard problems in distributed systems: 2. Exactly-once delivery 1. Guaranteed order of messages 2. Exactly-once delivery I originally posted this on Twitter, where it went viral. I felt it deserved a new canonical home. It’s probably the one thing I’ll be remembered for most 🤣 It has been quoted in books, conference talks, academic papers…