This page contains notes on ZeroMQ.
Subscribers "connect" to Publisher(s). There is latency involved in this process and thus Publishers should wait before sending-out messages.
Installation on Fedora requires the "uuid" package. This of course applies to Amazon AWS AMI Linux images.
For python pyzmq bindings, the Cython package is required and available at http://cython.org/. To compile the Cython package, the python development package is required: