Sun GlassFish Message Queue 4.4 Technical Overview

Propagation of Information Across a Cluster

To facilitate delivery of messages across the cluster, information about the destinations and consumers of each broker is propagated to all brokers in the cluster. Each broker therefore stores the following information:

Changes in this information are propagated whenever one of the following events occurs:

The propagation of destination and consumer information across the cluster means that destinations and consumers are essentially global to the cluster. In the case of destinations, properties set for a physical destination (see Configuring Physical Destinations) apply to all instances of that destination in the cluster. Distributing producers across a cluster thus results in cumulative cluster-wide limits specified by destination properties such as the maximum number of messages, the maximum number of message bytes, and the maximum number of producers.