Understanding Cache
Deep dive into how CDN caching works. Learn about cache hierarchies, origin shielding, and strategies for maximizing cache efficiency.
Lessons
Hands-On Labs
Debug a Two-Tier Cache Intermediate Free
An nginx edge sits in front of a Varnish cache in front of a Flask origin. Every request reaches the origin. Find out why, and make the edge actually cache.
Publish a Fix Without Waiting for the TTL Advanced
A page went out with a wrong price and it is cached for an hour. You cannot wait an hour. Build a purge mechanism — and make sure it cannot be used by anyone who finds the URL.
Module Quiz
Test your knowledge after completing all lessons in this module.