Combining topic spaces in publish/subscribe networks

Combine the topic space of a queue manager with other queue managers in a publish/subscribe cluster or hierarchy. Combine publish/subscribe clusters, and publish/subscribe clusters with hierarchies.

We can create different publish/subscribe topic spaces by using the building blocks of CLUSTER, PUBSCOPE and SUBSCOPE attributes, publish/subscribe clusters, and publish/subscribe hierarchies.

Starting from the example of scaling up from a single queue manager to a publish/subscribe cluster, the following scenarios illustrate different publish/subscribe topologies.

Create a single topic space in a publish/subscribe cluster
Scale up a publish/subscribe system to run on multiple queue managers. Use a publish/subscribe cluster to provide each publisher and subscriber with a single identical topic space.
Adding a version 7 or later queue manager to existing Version 6 topic spaces
Extend an existing Version 6 publish/subscribe system to interoperate with a version 7 or later queue manager, sharing the same topic spaces.
Combining the topic spaces of multiple clusters
Create topic spaces that span multiple clusters. Publish to a topic in one cluster and subscribe to it in another.
Combining and isolating topic spaces in multiple clusters
Isolate some topic spaces to a specific cluster, and combine other topic spaces to make them accessible in all the connected clusters.
Publishing and subscribing to topic spaces in multiple clusters
Publish and subscribe to topics in multiple clusters using overlapped clusters. We can use this technique as long as the topic spaces in the clusters do not overlap.

Combining topic spaces in publish/subscribe networks

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