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- ================
- Zeromq Transport
- ================
- .. note::
- Zeromq is the current default transport within Salt
- Zeromq is a messaging library with bindings into many languages. Zeromq implements
- a socket interface for message passing, with specific semantics for the socket type.
- Pub Channel
- ===========
- The pub channel is implemented using zeromq's pub/sub sockets. By default we don't
- use zeromq's filtering, which means that all publish jobs are sent to all minions
- and filtered minion side. Zeromq does have publisher side filtering which can be
- enabled in salt using :conf_master:`zmq_filtering`.
- Req Channel
- ===========
- The req channel is implemented using zeromq's req/rep sockets. These sockets
- enforce a send/recv pattern, which forces salt to serialize messages through these
- socket pairs. This means that although the interface is asynchronous on the minion
- we cannot send a second message until we have received the reply of the first message.
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