Bucardo is another popular logical replication engine that actually seems to have originated earlier than Slony, in 2002. Like Slony, it also uses triggers to perform its synchronization activity, but its syntax is much simpler. Furthermore, it also provides multi-master capabilities; this means that changes made in either the primary or secondary node will appear in both copies of a replicated table.
There is something to be said for tools that encourage simplicity when maintaining a complex high-availability architecture. Let's explore Bucardo further.
