Programming Interface Information

As with the RESTORE command, COPY invokes the Automatic Class Selection (ACS) routines, which in turn assign or override a data set’s classes.

When you use the COPY command, you are in the ACS ALLOC environment. The storage class ACS routine is executed first. If the storage class assigned is not null, the management class ACS routine and then the storage group ACS routine are executed. (See ACS variables available during Copy function for a list of variables available to ACS routines during copy processing.)

If you do not specify otherwise, DFSMSdss passes the source data set’s class names as input to ACS. If you want to specify storage and management class names to be passed to ACS, you can use the STORCLAS and MGMTCLAS keywords. You can use the NULLSTORCLAS and NULLMGMTCLAS keywords to pass null storage and management classes to the ACS routines.

VSAM alternate indexes do not have SMS constructs of their own; they use the same constructs as the base cluster. When copying or moving alternate indexes as independent clusters (because you did not specify the SPHERE keyword on the COPY command), DFSMSdss passes null classes to ACS. If you want DFSMSdss to pass the base cluster’s classes to ACS, you must invoke sphere processing by specifying the SPHERE keyword on the COPY command.

If you do not want a data set to be SMS-managed, specify the BYPASSACS and NULLSTORCLAS keywords.

All of these keywords work the same for the COPY command as they do for the RESTORE command (see Changing storage class with the RESTORE command and Changing management class with restore processing).

End Programming Interface Information