Read-your-writes consistency.
also: read-your-writes · read your writes · read-after-write consistencyA user always sees their own writes immediately, even if other users may still see stale data.
the two-minute refresher
- The classic bug: update your profile, refresh, and the old value is back.
- Fix: route a user's reads to the leader for a while after they write.
- Or track the user's last write position and only read from replicas that have caught up.
- Other users may still lag; only the writer is guaranteed to see the change.