[Twisted-Python] Question about PB and multicast

[Chaz.]

I am building an application that has tens of thousands of clients.
There are times when I need to talk to quite a few of the clients using PB.

When I have to talk to a single (or a few) clients via PB I do the
normal thing - issue multiple calls. In the cases where I have to talk
to quite a few clients I had thought of changing the object I am sending
to include the names of the machines I am interested in talking to. I
would then send it via multicast using PB. I know this would require
some changes on the PB side, but I am wondering if anyone sees a problem
doing this?

Peace,
Chaz.