> A state machine cannot reconstruct the past. It can only move forward. Does keeping a log of state changes, an addition to the current state, transform a sta

> A state machine cannot reconstruct the past. It can only move forward. Does keeping a log of state changes, an addition to the current state, transform a state machine into an event-driven system? > You’re getting scalability by forcing the client to accept more responsibility. How? Believing that a client is never buggy or malicious is just asking for problems. Alternatively, if "responsibility" here means simply that a client should be able to replay a history of events received from the server on its own, then this problem reduces to the question I asked paragraph above.