5. FILES › 5.2 VTOC/Catalog Activity Information Area Files › 5.2.4 Data Class Summary File (VCADCS) › 5.2.4.3 VCADCS Usage Considerations

5.2.4.3 VCADCS Usage Considerations

This section identifies any special considerations or
techniques related to using the VCADCS file.

1.  The observations for the VCADCS file are built from the
    data elements of the VCADAA file at the DETAIL timespan.

2.  The purpose of the file is to provide an automatic
    summarized view of the detail data organized around the
    SMS construct of DATACLAS (CA MICS element STORDATC).
    Since STORDATC is not maintained as a sequence/summary
    element in any other VCA file, this file (VCADCS) is the
    only place in which to view the historical usage of
    DATACLAS.  For example, you can examine this file to view
    which accounts in your enterprise are using DATACLAS and
    by careful analysis of the VCADCS file, you may be able
    to gain new insights into what the ACS routine for
    DATACLAS is missing.  By expanding the boundaries of the
    DATACLAS ACS routine to include more data allocations or
    to become less restrictive, the end-user community is
    freed from coding JCL and the goals of centralized
    storage administration are furthered.

3.  Note that data element DAACOST is carried forward into
    the VCADCS file through normal CA MICS summarization of
    numeric elements.  If you are charging for DASD at the
    DAYS level, DAACOST will have missing values.  Yet if you
    are charging at the DETAIL timespan, DAACOST will be
    summarized by DATACLAS in this file and it provides
    simply another measure of utilization by DATACLAS.