On z/OS® systems, you can define WebSphere® MQ shared queues as input and output queues for message flows.
Use the WebSphere MQ for z/OS product facilities to define these queues and specify that they are shared.
For more information about configuring on z/OS, refer to the z/OS Concepts and Planning section of the WebSphere MQ Version 6 information center online, or the Version 5.3 book on the WebSphere MQ library Web page.
If you use shared queues, you can provide failover support between different images running WebSphere Event Broker on a sysplex.
You cannot use shared queues for broker or User Name Server component queues such as SYSTEM.BROKER.CONTROL.QUEUE.
Shared queues are available only on z/OS.