2
Understanding Cache
Deep dive into how CDN caching works. Learn about cache hierarchies, origin shielding, and strategies for maximizing cache efficiency.
9 Lessons
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.
40 min
200 pts
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.
45 min
250 pts
Module Quiz
Test your knowledge after completing all lessons in this module.
Take Quiz
11 questions • Unlimited