No there is much more to it than that. FoundationDB has a completely different architecture that is optimized for completely different things than Redis is. It’

No there is much more to it than that. FoundationDB has a completely different architecture that is optimized for completely different things than Redis is. It’s not just about writing to disk vs. not. Redis is basically a very performant, single-threaded (mostly) single-node in-memory datastructures system with an efficient and readable server protocol strapped to it. FoundationDB is a completely different beast that has like 6+ distinct roles, and is optimized almost exclusively for interactive serializable transactions, range reads, and correctness. They’re just completely different things, I recommend reading the FoundationDB paper to get a sense for its architecture. The amount of “steps” involved in processing an FDB write is much higher than in Redis.