Redis Cluster & Scaling
Replicas and Sentinel (Lesson 8) give you high availability, but every write…
Tag
#scaling
8 posts
Production: Test, Monitor, Scale
A voicebot that works in a demo and a voicebot that works in production are…
Scaling Postgres + Capstone: Debugging a Slow Database
We’ve reached the last lesson. We started with pages and tuples and worked up…
Scaling AI Agents in Production
The first agent I put into production handled about 300 conversations a day. It…
In the Wild: How Shopify Survives Flash Sales
The textbook flash sale design is a clean whiteboard exercise. Shopify runs it…
WebSockets with Socket.io in Node.js
WebSocket vs HTTP Traditional HTTP follows a request/response model — the client…
System Design Masterclass
System design is the skill that separates senior engineers from everyone else…
Scaling Writes — Sharding, Write-Ahead Logs & Partitioning
Scaling reads is straightforward — add caches, replicas, CDN. Scaling writes is…