Invalidation: getting stale data out
Why a flash sale showed the wrong price for an hour, the trilemma of freshness, simplicity and performance, TTL, event-driven and versioned invalidation, why delete beats update, the TTL safety net, leases, decomposed caching, and how to invalidate across regions.
01 · Previously
W04 · DAY 02 · Invalidation Strategies
Putting data in is easy. Getting it out isn't.
Previously: the four patterns
Previously, on Day 1, you learned the four caching patterns, with cache-aside as the default.
0:00 / 18:11