Schrödinger's Avatar

A user just updated their profile picture, but on refresh they still see their old face. Maybe it's your platform's way of saying they looked better before. Meanwhile Finance just saw the AWS bill for your "highly available" read replicas. The Job: After a write, the very next read has to show the latest data, not a stale one from a lagging replica, and reads still have to be fast. Fix the ghost of the old avatar without the replica fleet bankrupting you. Save their image, and your own.

Free to play, no account needed. A deterministic engine grades your design against this scenario's SLA - error rate, latency, and cost.