4. Operation › 4.4 Administering CA MICS › 4.4.4 CA MICS Administrator Utilities › 4.4.4.6 CA MICS Space Utilization and Reporting › 4.4.4.6.2 CA MICS Database Estimator

4.4.4.6.2 CA MICS Database Estimator

The Database Estimator is used to estimate the
maximum size of a CA MICS database.  Space can be reported in
bytes, blocks, tracks, or cylinders simply by changing the
execution panel option.

It is important to understand that this report is not
suitable for modeling or 'what-if' analysis.  Modeling
implies that space estimates can be made before the first
update.  Therefore, the Database Space Estimator cannot
predict space that will be used by a component before it is
installed into a unit or space for moving components from one
unit to another.

Since the Database Space Estimator bases its estimate on existing
files in the CA MICS database and from information in
prefix.MICS.PARMS(DBMODEL), it can be used for:

  o Estimating the maximum size of the CA MICS database
    in as few as a single database update;

  o Monitoring space increases or decreases following a
    configuration change (e.g. DBMODEL);

  o Tuning database size and cycling definitions.

The Database Space Estimator also reports on the estimated
maximum size of each physical data set comprising the CA MICS
database.  This is obtained by adding to the allocated space
the maximum size of each remaining secondary extent. Note
that this value does not take into account the availability
of secondary extents or multiple volumes.

The Database Space Estimator contains the following
reports:

   o The Invalid File Report provides a list of files that
     cannot be identified as belonging to the CA MICS
     database structure.  Invalid files can be the result of
     residual files from an incomplete database update, user
     created files, and obsolete files.

     Invalid files will be reported in the 'Unknown' category
     of the Information Area and File Summary reports.  The
     CA MICS Database Health Check Utility can be run to help
     resolve issues with identified invalid files. For more 
     information about the CA MICS Database Health Check 
     Utility, see section 4.4.4.5

   o The Libname Summary provides overview information for
     each timespan in the database.

   o The Information Area Summary Report shows space
     utilization for each Information Area within a timespan.
     This report is useful for determining where a database
     can be split.

   o The File Summary Reports show space utilization for
     each file in a timespan. Note that all cycles for a file
     are comprised in a single line entry.

The following subsections provide more details concerning the
CA MICS Database Space Estimator Reports:

          1 - Panel Entries
          2 - Sample Output