[zeromq-dev] Subports

[Martin Sustrik]

On 05/03/2011 05:24 PM, Mike Santy wrote:
>
>>
>> The question is whether such a solution is in any way better than simply
>> using different TCP ports for different 0MQ sockets.
>>
>
> Maybe I'm missing something here, but the subport idea just sounds to me
> like something that should be implemented in a device that maps ports to IPC
> endpoints.  As I presume this is not going to be a common use-case, this
> choice would keep the libzmq core simpler and move the complexity out into
> an optional device.

Sure, you can do that even now, however, it works only in "one 
functionality per port" way.

For example, if you have a REQ/REP topology and a PUB/SUB topology you 
can't tunnel both through a single device.

The subports are meant to solve that kind of problem. For example the 
REQ/REP topology would use port 5555, subport 1 while the PUB/SUB 
topology would use port 5555, subport 2.

Martin