A JES3 complex must be entirely contained within a sysplex; including more than one JES3 complex in a sysplex is not recommended. A JES3 complex in a sysplex must have a unique XCF group name. The default JES3 XCF group name is the node name defined by the NAME= keyword on the NJERMT initialization statement for the home node (HOME=YES) specified, if one exists. If you have not defined any NJERMT statements, the default is N1. It is recommended that you use the default name, unless it conflicts with an existing XCF group name. You can use the XCFGRPNM keyword of the OPTIONS initialization statement to override the default JES3 XCF group name.

The JES3 XCF group contains one member for each JES3 system active in the JES3 complex, plus one member for each converter/interpreter (C/I) or writer functional subsystem (FSS) active in the JES3 complex. See z/OS JES3 Initialization and Tuning Guide.