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BIM-EPIC System Datasets Defining the DSN Catalog
Chapter 2. Installing the Basic System 2-19
Defining the DSN Catalog
The DSN Catalog can be shared with other BIM-EPIC systems, including CA-EPIC for CMS.
When you plan the location and size for the DSN Catalog, the requirements of all systems
must be considered. If the DSN Catalog is to be shared with another system, review the
sharing requirements at 2-68 in this manual.
Determine the DSN Catalog size requirements.
1. First determine the number of records the DSN Catalog will contain. There will be:
two records for each dataset name
one record for each extent of a disk file or volume of a tape file for each active version,
each “open” or “conditionally cataloged” version, and each scratched tape version
If the JOBQ is to reside in the DSN Catalog, add the number of records required for the JOBQ
(see below).
2. Use one of the following formulas to determine the amount of space to allocate:
For CKD tracks:
R+32
16*B
For FBA blocks:
R+32
2
where R is the estimated number of records the catalog will contain. B is the number of
blocks per track. Use the following table to determine the value of B:
CKD Device Type Number of Blocks
Per Track
3330 3
3340 2
3350 4
3375 8
3380 10
3390 12
9345-1 10
9345-2 10
Description
Space
Requirements
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