[zeromq-dev] Multicast and send/recv

gonzalo diethelm gdiethelm at dcv.cl
Mon Feb 22 14:57:17 CET 2010


> >> Yes. I think using multicast for this kind of thing makes sense.
> >
> > And what kind of socket would you use? Since it has to be
bidirectional,
> > it seems as if REQ/REP or UPSTREAM/DOWNSTREAM are the only
candidates,
> > right?
> 
> Multicast will work only with PUB/SUB sockets. Thus, what you have to
do
> is to create one PUB socket and one SUB socket in both supervisor and
> individual applications. Supervisor will use PUB socket to send the
ping
> command, SUB to receive responses. Applications will use SUB socket to
> receive the ping and PUB socket to respond with their identities.

Ok. This would also have the advantage of allowing more than one
supervisor.

> One more thought: Is 'ping' needed at all? What if applications just
> sent their identities once in a while to the supervisor?

I thought about this as well, but I would also like the supervisor to
have the ability to send commands to the programs. For instance,
"pause", "shutdown", etc.

Thanks for the insight.

-- 
Gonzalo Diethelm



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