5. OPERATION › 5.2 VCC Data Recording › 5.2.1 VCC Data Record Layout

5.2.1 VCC Data Record Layout

The record that VCC generates is segmented in structure.  In
this way one record can represent several different types of
data.  The types include the following:

    o  The VTOC data set record
    o  The VSAM data set record
    o  The VTOC/volume record

All VCC-DFHSM records have a standard SMF header section.
The VCCRCORD macro, distributed in sharedprefix.MICS.MACLIB,
maps the records.  The record layout is presented segment by
segment as a box diagram.  Detailed information at the field
level is available by browsing the VCCRCORD macro in the
latest release of the product.


VTOC Data Set Record

+-----------------+
|SMF HDR-BASE SEG |
+--+--------------+----+
   | NON-VSAM BASE SEG |
   +-+--------------+--+
     | EXTENT 1 SEG |
     +--------------+
     | EXTENT 2 SEG |
     +--------------+
     | EXTENT n SEG |
   +-+--------------+--+
   | USER SEG          |
   +-------------------+

VSAM Data Set Record

+-------------------+
| SMF HDR-BASE SEG  |
+-+-----------------+
  | VSAM BASE SEG   |
  +-+---------------+----+
    | DATA COMPONENT SEG |
    +--+--------------+--+-----------+     +--------------+
       | VOLUME 1 SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+
       | VOLUME 2 SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+
       | VOLUME n SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+


    If needed:

    +--+--------------+---+
    | INDEX COMPONENT SEG |
    +--+--------------+---+----------+     +--------------+
       | VOLUME 1 SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+
       | VOLUME 2 SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+
       | VOLUME n SEG | EXTENT 1 SEG | ... | EXTENT n SEG |
       +--------------+--------------+     +--------------+





VTOC/Volume Record

+-----------------+
|SMF HDR-BASE SEG |
+-+---------------+-+
  | VTOC/VOLUME SEG |
  +----+------------+------------+
       | FREE SPACE EXTENT 1 SEG |
       +-------------------------+
       | FREE SPACE EXTENT 2 SEG |
       +-------------------------+
       | FREE SPACE EXTENT n SEG |
       +-------------------------+