pg-trickle Relay Has Moved
The pg-trickle relay no longer exists. Relay, outbox, inbox, consumer-group, and relay-process features now live in pg_tide.
Use the current guide: pg-tide Relay: Hub-and-Spoke.
pg_trickle is still used by pg_ripple for incremental view maintenance (SPARQL views, Datalog views, CONSTRUCT/DESCRIBE/ASK views, and ExtVP), but not for relay transport.