Learn how to design systems at scale and prepare for system design interviews.
Primitives
- Load balancer
- Gateway (rate-limiting, authentication)
- Database
- SQL vs NoSQL, sharding strategy
- if SQL, indices
- Cache (optionally clustered/sharded)
- Message queue, with workers
- CDN
- Lambdas
Checklist
- Clarify requirements
- Write QPS, average and peak (peak is 2x average)
- Read QPS (approximate 10x write QPS)
- Total storage required
- Latency requirement
- Consistency vs Availability
- High level diagram that matches requirements
- Deep Dive
- APIs
- Database schema
- Wrap up
- Error cases
- Potential bottlenecks
- Extra credit
- Cost (development vs ongoing)
- Logging, metrics, alerts
- Automation - CI, CD
- i18n
- CDN
- RPC
Brief View
Designs
Rate Limiter
KV Store
Tiny URL Mechanism
Web Crawler
Notification Service
News Feed
Chat Service
Another One:
Another Chat Application
Permission System
