You can set up parmlib so two or more MVS™ systems can share parmlib members — even if those systems require unique values in those members. When coding parmlib members, you can use system symbols to temporarily replace unique values. Each system defines its own unique values for the system symbols. As with variables in program, each system replaces the system symbols with the defined values when the system symbols are processed. With ability to share parmlib members that require unique values allows, you can view the sysplex as a single system image with as little as one SYS1.PARMLIB data set.
For complete details about how to set up parmlib so two or more systems can share it, see Sharing parmlib definitions.