Storage classes

A storage class maps one or more queues to a page set. This means that messages for that queue are stored on that page set.

Storage classes allow you to control where non-shared message data is stored for administrative, data set space and load management, or application isolation purposes. We can also use storage classes to define the XCF group and member name of an IMS region if you are using the IMS bridge (described in WebSphere MQ and IMS).

Shared queues do not use storage classes to obtain a page set mapping because the messages on them are not stored on page sets.