[zeromq-dev] [PATCH] Introduce ZMQ_ROUTER and ZMQ_DEALER sockets
ph at imatix.com
Mon Jun 20 14:23:04 CEST 2011
On Mon, Jun 20, 2011 at 2:08 PM, Ian Barber <ian.barber at gmail.com> wrote:
> This seems to open the possibility of getting unintended duplicate identity
Yes, it's possible to have two outgoing TCP connections using the same
temporary ports. This could create weirdness in edge cases. To be
evaluated against the benefits of a printable and informative peer
address. I don't think there's any specific issue with NAT.
> For PGM I guess it
> would have to be the interface IP address, though we don't have an easily
> distinguishable port there do we? AFAIU you could have multiple publishers
> on one box pushing from the same interface onto the same multicast IP/port?
For PGM it would probably have to be the multicast group address.
> I think there would need to still be the leading null or similar to
> distinguish generated identifies from manual identities, or are manual
> identities being ditched completely in 3 (I am fine with that :)).
My vote would be to ditch manual identities after looking carefully at
applications that use them, and designing alternative patterns. E.g.
for durable pubsub we have the Clone pattern.
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