In a multisystem environment, your objective should be to share
one parmlib concatenation with as many systems as possible.
- Examine your installation configuration and determine the best
way to consolidate all LOADxx information for all MVS™ images in a sysplex into one LOADxx member
using the HWNAME, LPARNAME and VMUSERID parameters. The LOADxx parameters
HWNAME, LPARNAME and VMUSERID provide segmentation of the processor
hardware name, the logical partition name and the VM Userid. For more
information about filter parameters, see LOADxx (system configuration data sets).
- Determine how many members of parmlib you can share with
other systems. For example, if two systems use different CLOCKxx members,
and only one value in each member is different, chances are that the
two systems can share one CLOCKxx member.
- If you cannot share members, determine if you can share system
parameter definitions in one IEASYSxx member. For example, if you
must use separate CLOCKxx members for two different systems, you can
code the CLOCK=xx parameter in a shared IEASYSxx member that specifies
the unique CLOCKxx member for each system.
System symbols are
the elements that represent unique values in shared members. When
determining which members are to be shared, you must consider which system symbols are available
to you, the values of those system symbols, and how
you can use them to optimize the sharing of parmlib.
The following sections explain how to use system symbols and plan
for parmlib sharing.