Clojurians Log v2

I am trying to understand the idea of m/publisher. So how I think it works is that if a flow is used by m/reduce then if I run multiple m/reduce at the same time this would create multiple Prozesses each running a different flow. But if I wrap the flow into a publisher then the flow gets started on the first m/reduce and it can be as many clients connected but it still would be one process. So the publisher uses the "last one shuts down the light" approach. But to operate on flow and publisher .. in both Cases I would use the missionary functions that Operate on flow.