Each time you read a data item, you must assign the data item to a storage class. To specify the storage class, specify the STGCLASS keyword. If the data item is currently assigned to a storage class, you can assign it to the same class or reassign it to a different class.

The system determines the number of storage classes for the structure based on the value specified on the first invocation of IXLCONN that allocates the structure. The system ignores any subsequent specifications made by subsequent connectors to the structure as long as the structure remains allocated. Storage classes are numbered consecutively from 1 to n where n is the number of storage classes specified on IXLCONN.

For information on how to use storage classes to manage resource reclamation, see Managing Cache Structure Resources.