Horizontal Scaling
Stateless services, auto-scaling
- 00 Horizontal Scaling — Roadmap Stateless services, load balancers, auto-scaling, database bottlenecks, and WebSocket fan-out across instances. beginner 3 min →
- 01 Stateless Services Why stateless is the prerequisite for horizontal scaling — and how to extract state from your application so any instance can handle any request. beginner 8 min →
- 02 Load Balancers Layer 4 vs Layer 7, algorithms, health checks, connection draining — the mechanics of distributing traffic across instances. intermediate 10 min →
- 03 Auto-Scaling Scaling out on demand — target tracking, scheduled scaling, scale-in protection, and the metrics that actually drive good decisions. intermediate 9 min →
- 04 Scaling the Database Layer Read replicas, connection pooling, and why the database is almost always the horizontal scaling bottleneck. intermediate 9 min →
- 05 WebSockets & Shared State at Scale How to handle persistent connections, pub/sub fan-out, and the Redis adapter that makes Socket.io work across instances. intermediate 8 min →