z/OS HCD User's Guide
z/OS HCD User's Guide
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Catalog considerations z/OS HCD User's Guide SC34-2669-00 |
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Catalog considerationsOne IODF can contain configuration data mirroring multiple processor or logical partition system images, but being a VSAM data set, it can be cataloged in only one catalog. Therefore, if you wish to share an IODF data set among multiple systems and each system is using a separate master catalog, you must define (in the master catalog of each system) an alias that relates to the user catalog on the DASD that is shared among the systems. Define aliases and the user catalog before using HCD to define IODF data sets. Figure 145 shows the recommended IODF catalog structure for IODFs. Figure 145. Recommended IODF catalog structure. (When several OSs share
one IODF)
 Note:
It is useful to catalog the IODF in a user catalog which resides
on the same volume as the IODF. That way if the volume fails and must be
restored, the catalog/IODF connection is always preserved across the restore.
The catalog is used to reference the IODF during HCD definition activities
and during dynamic I/O reconfiguration, not during
IPL. 
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