VSAMRLS_SHCDS_CONSISTENCY

Description:

The check is looking to see if all SHCDSs are allocated with consistent allocation amounts.

Reason for check:

Allocate SHCDSs with consistent allocation amounts and use consistent values for primary allocation and secondary allocation for each SHCDS. Consistent allocation optimizes space utilization, while inconsistent allocation amounts waste space.

When the SHCDS with the smallest allocation starts to runs out of space, all SHCDSs are extended with their secondary quantity. SHCDS with large secondary quantities may extend unnecessarily. VSAM RLS expects identical allocation amount for all SHCDSs.

z/OS® releases the check applies to:

z/OS V1R9 and up.

Parameters accepted:

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(IBMVSAMRLS,VSAMRLS_SHCDS_CONSISTENCY)
SEVERITY(MED) INTERVAL(01:00) DATE('date_of_the_change')
REASON('Your reason for making the update.')

Debug support:

Verbose support:

Reference:

For more information, see the section on "Defining Sharing Control Data Sets" in z/OS DFSMSdfp Storage Administration.

Messages:

This check issues the following exception messages:

IGWRH0141E

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

SECLABEL recommended for MLS users:

SYSLOW