Routing vs. Mirroring
Connecting RBNB servers via “routing” parent/child connections makes them operate like one big RBNB server. Thus, if multiple clients individually request data from any one of the servers, they each get a separate data feed; starting all the way back at the source ring buffer.
If you want to minimize the number of times data is sent over the parent/child network connection, you could mirror the data between servers, then request (or subscribe) to the downstream copy. I.e, mirrors may be meant to do what you want in this case better than routing.