I have read great things about key/value stores such as Redis but I can’t seem to figure out when it’s time to use it in an application.
Say I am architecting a web-based application; I know what stack I am going to use for the front-end, back-end, database(s), etc..what are some scenarios where I would go “oh we also need Redis for X,Y, or Z.”
I would appreciate node.js examples as well as non-node.js examples.