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 the 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