5. OPERATION › 5.1 Operation Overview › 5.1.3 VSAM/ICF Catalog Scan Overview › 5.1.3.4 VCCVBCS--ICF Catalog Scan

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5.1.3.4 VCCVBCS--ICF Catalog Scan


The VCCVBCS module reads and records information in ICF Basic
Catalog Structures (BCSs).  An ICF BCS is a VSAM
key-sequenced data set (KSDS) that contains static catalog
information (data that is not changed frequently).  The ICF
catalog record formats are different in structure from those
encountered in VSAM catalogs, but the record types remain
basically the same as those described in the previous
section.

This module scans a BCS sequentially in much the same way
that a VSAM catalog is scanned by VCCVVSAM.  The data
generated is identical in format.  The difference lies in the
fact that volume, extent, and Access Method Data Statistics
Block (AMDSB) information is kept in a VSAM volume data set
on the device that a VSAM data set resides on, and therefore
won't be generated at the same time as the BCS information
for those data sets (see the description of the VCCVVDS
module).

VCCVBCS performs the same logical operations as the VCCVVSAM
module.