Cluster components

Cluster components

Clusters are composed of queue managers, cluster repositories, cluster channels, and cluster queues.

See the following subtopics for information about each of the cluster components:

Cluster repository
A repository is a collection of information about the queue managers that are members of a cluster.
Cluster queue manager
A cluster queue manager is a queue manager that is a member of a cluster.
Cluster queues
A cluster queue is a queue that is hosted by a cluster queue manager and made available to other queue managers in the cluster.
Comparison between shared queues and cluster queues
This information is designed to help you compare shared queues and cluster queues, and decide which might be more suitable for your system.
Cluster channels
On every full repository, you manually define a cluster-receiver channel, and a set of cluster-sender channels to connect to every other full repository in the cluster. When you add a partial repository, you manually define a cluster-receiver channel, and a single cluster-sender channel that connects to one of the full repositories. Further cluster-sender channels are defined automatically by the cluster when needed. Auto-defined cluster-sender channels take their attributes from the corresponding cluster-receiver channel definition on the receiving queue manager.
Cluster topics
Cluster topics are administrative topics with the cluster attribute defined. Information about cluster topics is pushed to all members of a cluster, and combined with local topics to create portions of a topic space that spans multiple queue managers. This enables messages published on a topic on one queue manager to be delivered to subscriptions of other queue managers in the cluster.
Default cluster objects
On Multiplatforms, the default cluster objects are included in the set of default objects automatically created when you define a queue manager. On z/OS®, the default cluster object definitions can be found in the customization samples.
Parent topic: Distributed queuing and clusters

Related information

Configure a queue manager cluster
Comparison of clustering and distributed queuing
Set up a new cluster