Understanding MQTT Transmission Servers and Sets

Servers

The Servers tab allows you to configure a list of the MQTT Servers that MQTT Transmission should connect to.

Multiple MQTT Servers can be configured in MQTT Transmission - often times more than one will be configured to handle fail-over in redundant or geographically distributed systems. 

Sets

The Sets tab allows you to configure server sets.

Each set represents a logical grouping of MQTT servers. 

When a set is referenced by a Transmitter configuration, a single connection to one of the servers in the set will be maintained. The other servers will act as failover in the case that a connection with the first is lost.

Server sets cannot have common elements meaning that a single MQTT server cannot be in more than one set.

Example

In the configuration below we have setup two server sets - one has two server configurations associated with it and one has three server configurations.