Eventual consistency.

also: eventually consistent

If writes stop, all replicas eventually converge to the same value, with no promise about when.

the two-minute refresher

Asynchronous replication with no special handling gives you this.
Clients may see stale data, out-of-order updates or temporary disagreement.
Fine for feeds, analytics dashboards and caches.
Often paired with session guarantees such as read-your-writes so users don't notice.

also: eventually consistent

If writes stop, all replicas eventually converge to the same value, with no promise about when.

Asynchronous replication with no special handling gives you this.
Clients may see stale data, out-of-order updates or temporary disagreement.
Fine for feeds, analytics dashboards and caches.
Often paired with session guarantees such as read-your-writes so users don't notice.