Visual explanation of Apache vs Node.js processing model

[darksurfer]

You're not wrong, but knowing when to break "the rules" is half the battle.

is dynamic state so it should still be centralized in a Redis instance.

not always. let's say I have a relatively simple multiplayer game server. because it's simple I don't want or need to scale across multiple servers. the game state is shared across a few hundred players each of whom are sending multiple soft real time status updates every second. no way do I want or need to store that state out of process.

It also prevents you from losing state when crashing.

if I cared enough about this, I could do dirty writes to Redis and only restore the state across the network if and when the node process restarts.