Redis
Build a Notification Service from Scratch — Part 2: Queue and Worker System
Part 2: Implement Redis-backed queue with Celery workers for email, SMS, and push notification delivery. Build channel-specific dispatchers.
Build a URL Shortener from Scratch — Part 4: Redis Caching for Fast Redirects
Part 4: Add Redis caching to the URL shortener for sub-millisecond redirects. Implement cache-aside pattern with read-through and write-through strategies.
How to Dockerize a Rails Application with PostgreSQL and Redis
Step-by-step guide to containerize a Ruby on Rails application with PostgreSQL and Redis using Docker and docker-compose. Production-ready setup included.
Fix: Sidekiq Jobs Not Processing — Troubleshooting Guide
Debug Sidekiq jobs that get enqueued but never process. Covers Redis connection, queue names, retry queues, and monitoring with the Sidekiq dashboard.