Allocate a WLM couple data set

You need to define a WLM couple data set for storing the service definition information. If you are running a sysplex with mixed release levels, you should format the WLM couple data set from the highest level system. This allows you to use the current level of the WLM application.

To allocate the WLM couple data set you can either use the facility provided in the WLM application, or you can run an XCF utility. For each case, you need to estimate how many workload management objects you are storing on the WLM couple data set. You must provide an approximate number of the following:

Policies in your service definition
Workloads in your service definition
Service classes in your service definition

The values you define are converted to space requirements for the WLM couple data set being allocated. The total space is not strictly partitioned according to these values. For most of these values, you can consider the total space to be one large pool.

If you specify 50 service classes, for instance, you are simply requesting that the space required to accommodate 50 service classes be added to the couple data set. You have NOT limited yourself to 50 service classes in the service definition. Although note that if you DO define more than 50 service classes, you will use up space that was allocated for something else.

You should define an alternate WLM couple data set (similar to the sysplex alternate couple data set) for recovery purposes. You can define an alternate WLM couple data set using the same method (either the ISPF application or the XCF utility), but specifying a different data set.

To allocate a WLM couple data set using the ISPF application, choose Utilities from the Definition Menu.

To allocate a WLM couple data set using the XCF utility, you can follow some JCL provided in the IWMFTCDS member of SYS1.SAMPLIB.