Boss: I need to know how much resources a server would need to serve 20000 users at the same time

Me: Sure, can I see the webapp?

B: There's not one yet

M: Ok, can I see its documentation then?

B: There is none

M: But ot depends on the programming language, libraries used, what kin-

B: It's an e-commerce. Try browsing Amazon and see how much they nees to handle the page requests.

Me: *still processing* wh-

Boss: I have to give an estimate to a client within 30 minutes. Hurry.

So.... Uh... I guess i have to hack Amazon now?