[zeromq-dev] zmq_req / zmq_rep topology

Martin Sustrik sustrik at 250bpm.com
Wed Mar 10 18:18:17 CET 2010


> I intend to create a fairly complex networking topology using zmq_rep 
> and zmq_req sockets.  I have a couple questions:
> 1.  When using IPC as the transport method, after binding a zmq_rep 
> socket to an IPC pathname, can I have multiple zmq_req sockets connect 
> to that same pathname and expect replies to be routed correctly by ZMQ?  
> (Are you using ports to identify to whom replies should be sent?)

Yes, you can. The mechanism underneath uses UNIX domain sockets rather 
than TCP i.e. no ports.

> 2.  I believe I need zmq_queue for my topology as well.  I noticed in 
> the manual that it has no documentation (all fields are "to be 
> written").  If it is incomplete, are there any updates on when it will 
> be released?  If it's finished, but simply doesn't have a manual page 
> yet, are there any examples of its usage out there that I could check out?

zmq_queue is and multi-hop REQ/REP is unfinished. You can make it work, 
but it requires some manual tweaking.

Jon Dyte was already able to get it working so he may consider 
commenting here.


More information about the zeromq-dev mailing list