Glossary term
What is Egress / Ingress? Meaning for developers
Data going out of / into a network or cloud. Example: Cloud providers usually charge for egress (data sent to users).
Learn it properly · System DesignLesson 10: Back-of-the-Envelope Estimation, Step by StepFive minutes of rough maths tells you whether you need one database or fifty. The numbers worth memorising, a seven-step recipe, and a full worked estimate for a photo-sharing app — with a calculator to try your own.