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System design is choosing the boxes and arrows behind an app, and knowing how they behave when millions of people show up. This track starts with requirements and honest back-of-the-envelope numbers, grows one server into many behind a load balancer, and adds caches and CDNs. Then it tackles the hard parts: scaling the database, queues and duplicate messages, rate limits, consistency, and seeing inside a running system.

Most lessons are concepts, small numbers and diagrams, with code only where it makes an idea concrete. The track ends with you designing a home feed and a live leaderboard, step by step.

레슨: 14
시간: 2시간
난이도: 중급

코스 시작하기 · Requirements and estimates

이 코스의 레슨은 당분간 영어로 제공돼요.

브론즈 도전 가능
실버 도전 가능
골드 잠김

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Turn requirements into load estimates with back-of-the-envelope math
Scale stateless servers behind a load balancer with health checks
Use caches, TTLs and CDNs without serving stale or unreachable content
Scale a database with pooling, replicas and, as a last resort, sharding
Move slow work to queues and make consumers safe against duplicates
Choose consistency per feature and alert only on what users feel

여정

1
챕터 1
From one server to many

Requirements and estimates, stateless servers behind a load balancer, caches and CDNs.

0 / 4
2
챕터 2
Data and events at scale

Scale the database, use queues safely, limit traffic, choose consistency and watch it all run.

0 / 6
3
챕터 3
Next steps

Real-time features, search, multiple regions and cost.

0 / 4