On 2018-03-31 22:13:42 +0800, Craig Ringer wrote: > We'll still need a mechanism to transport them to downstreams (like WAL > messages) and to send responses upstream. For responses I think we will > finally want to add a backchannel to the logical replication protocol as > I've wanted for a long while: downstream can send a COPY message on COPY > BOTH proto back to upstream, which passes it to a callback on the output > plugin for the output plugin to act on.
Not necessarily? You can just send out the prepare, wait for all clients to ack it, and then commit/rollback prepared. Greetings, Andres Freund
