4. Operation › 4.4 Administering CA MICS › 4.4.8 CA MICS Administration in SMS-Controlled Environment › 4.4.8.6 Empty Data Sets

4.4.8.6 Empty Data Sets

CA MICS normal operation includes allocation of empty, or
nearly empty, files that are sometimes spotted by a Storage
Administrator or software storage management agent (such as
the SMS Management Class Space Release function).  The
storage manager's standard response is to delete, reblock, or
release the "over-allocated" space.  However, CA MICS has
preallocated that space for a reason (for example, to hold
month-to-date accounting information).  Arbitrary space
release will probably cause a later CA MICS run to fail.

The best defense is a good naming convention that can be
recognized and honored by space management tools.

CA MICS provides the SYSTEMMODEL parameter for both the
complex level (sharedprefix.MICS.PARMS(JCLDEFC)) and the unit
level (prefix.MICS.PARMS(JCLDEF)) to allow users to specify a
system-wide data set control block (DSCB).  This DSCB is then
used by default during allocation, so that SMS or other
utilities do not intervene.

If NOMODEL is used as the SYSTEMMODEL model dataset name, the
use of the model dataset in the DCB specification will be
bypassed.

Refer to Sections 2.3.1.6.4 and 2.3.3.2.1.5 for more
information about the SYSTEMMODEL parameter.