Example of a multiple broker configuration
We can have only one broker on each WebSphere MQ queue manager; however, brokers can communicate with other brokers in your WebSphere MQ system, so subscribers can subscribe to one broker and receive messages that were initially published to another broker.
In this example, a second broker has been added.
- Broker 2 is used by Publisher 4 to publish weather forecast information, using a topic of Weather, and information about traffic conditions on major roads, using a topic of Traffic.
- Subscriber 4 also uses this broker, and subscribes to information about traffic conditions using topic Traffic.
- Subscriber 3 also subscribes to information about weather conditions, even though it uses a different broker from the publisher. This is possible because the brokers are linked to each other.
A publication is propagated to another broker only if a subscription to that topic exists on the other broker.
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