Scaling web services
Comes up in: Backend design, Frontend system design
This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.
What it covers
- vertical vs horizontal scaling
- stateless services
- load balancers (L4 vs L7)
- CDNs
- autoscaling
- serverless and edge functions trade-offs
Words you will know
What you will practise
- scale a simple API from 100 to 100k RPS (diagram)
Interview questions this answers
- How would you scale a web application to millions of users?
- Design a URL shortener.
- Design a notification service that sends millions of messages a day.
- Fan-out on write vs fan-out on read for a feed: trade-offs?
- How do you scale WebSocket servers?