Not just across concurrent processes, but also serial ones. Externalizing a cache into something like Redis lets you bounce your process with no reload time. Yo

Not just across concurrent processes, but also serial ones. Externalizing a cache into something like Redis lets you bounce your process with no reload time. You can get around it for some things like web sessions with a signed cookie, but that opens up expiration and invalidation issue. But that doesn’t work for caching non trivial calculations or intermediate state. There’s a sweet spot for transitory persistence.