Related: Redis has a keyspace notification doing something similar that is not very well known, but when it is needed, it is really needed. We are thinking of extending this mechanism in new ways. Similarly I have seen setups where the notifications arriving from Postgres/MySQL are used in order to materialize (and keep updated) a cached view in Redis. To me, it is interesting how certain teams relay on these kind of mechanisms provided by database systems, and other teams like to do things in the client side to have full control, even in the face of having to reimplement some logic.