Storage classes

Storage classes can exist only on z/OS® queue managers. A storage class maps one or more queues to a page set. This means that the messages on the queues are stored on the page set.

We can use storage classes to control where non-shared message data is stored for administrative, data set space and load management, or application isolation purposes. Only queues that are not shared store their messages on page sets. Therefore, shared queues do not use storage classes. The messages on shared queues are stored in coupling facility structures instead.

We can create storage classes in IBM MQ Explorer but the only storage class property that we can configure is the Description field.