CATALOG_RNLS

Description:

Check verifies that your data sets reside on different volumes as other shared catalogs.

CATALOG MANAGEMENT uses the SYSIGGV2 resource while serializing access to catalogs. The SYSIGGV2 resource is used to serialize the entire catalog BCS component across all I/O as well as to serialize access to specific catalog entries. The SYSZVVDS resource is used to serialize access to associated VVDS records. The SYSZVVDS resource along with the SYSIGGV2 resource provide an essential mechanism to facilitate cross system sharing of catalogs. When customer's data sets reside on the same volume as other shared catalogs, deadlocks can occur. This GRS RNL Health Check will help preventing lockouts from shared volumes. The check will perform the system check and indicate when GRS RNLs do not match IBM® recommendations for SYSIGGV2, SYSZVVDS, and SYSVTOC.

Reason for check:

All Catalog RESERVES should be converted to SYSTEMS ENQUEUEs unless catalogs are shared outside the sysplex.

z/OS® releases the check applies to:

z/OS V2R1 and later.

User override of IBM values:

The following shows the default keywords for the check, which you can override on either a POLICY statement in the HZSPRMxx parmlib member or on a MODIFY command. This statement may be copied and modified to override the check defaults:

UPDATE
CHECK(IBMCATALOG,CATALOG_RNLS)
ACTIVE
SEVERITY(LOW)
INTERVAL(TIMER) HOURS(336)
REASON('Your reason for making the update.')

Debug support:

Verbose support:

Parameters accepted:

Reference:

Messages:

This check issues the following exception messages:

IGGHC110I
IGGHC111E

See z/OS MVS System Messages, Vol 9 (IGF-IWM).