How to talk about it · To start with, don’t just say “I need 120ms.” Try some­thing more like “This has to be in Python, the data’s in Cas­san­dra, and I need t

How to talk about it · To start with, don’t just say “I need 120ms.” Try some­thing more like “This has to be in Python, the data’s in Cas­san­dra, and I need the P50 down un­der a fifth of a sec­ond, ex­cept I can tol­er­ate 5-second la­ten­cy if it doesn’t hap­pen more than once an hour.” And in most main­stream ap­pli­ca­tion­s, you should be able to get there with server­less. If you plan for it.