Hello,

My questions relate to what messages are sent between routers in a SwiftMQ router network under certain conditions. I'm trying to get a sense of how much network bandwidth will be taken up by the message exchanges.

Say we have a simple network with 3 routers: A, B, and C. A is directly connected to B, and B is directly connected to C. Also, we have a topic T defined in each of the routers, with client apps on A and B publishing and subscribing to T.

1. If the client connected to A publishes a message on T. I know that B will get the message, but does the message get shuttled over the network to C, even though no one there is currently subscibing to it? I thought I read somewhere in the docs that it would not, but I just looked at them again quickly and couldn't find that statement.

2. How about the same scenario as 1, but now with a client connected to C that is subscribing to T, but with a message selector that happens to filter out the messages being sent by A. Now, I know the C client won't get any of the messages, but will they be sent over the network from A to B to C? What I'm wondering is if there is some sort of message selector 'back propagation' that would eliminate even sending messages across the network that ulimately wouldn't make it to a client anyway.

Thanks.