Event-driven invalidation.

also: event-based invalidation · event driven invalidation

Publishing a change event when data is written, and having consumers delete or refresh the affected cache keys.

the two-minute refresher

Write path: update the DB → publish product.updated → the invalidator deletes product:123.
Staleness drops to the event's propagation delay instead of the TTL.
Events can be lost or delayed: keep a TTL as a safety net.
Publish reliably (outbox or CDC), or the cache silently goes stale.

also: event-based invalidation · event driven invalidation

Publishing a change event when data is written, and having consumers delete or refresh the affected cache keys.

Write path: update the DB → publish product.updated → the invalidator deletes product:123.
Staleness drops to the event's propagation delay instead of the TTL.
Events can be lost or delayed: keep a TTL as a safety net.
Publish reliably (outbox or CDC), or the cache silently goes stale.