Description: Global Resource Serialization (GRS) has added GRS ring support of FICON® CTCs. The configuration recommendation is for GRS Star over GRS Ring and for GRS Ring environments to utilize XCF messaging, which already supports FICON. However, it is still valid to configure a GRS complex that extends outside of a sysplex or to configure a GRS complex with no sysplex at all.
When change was introduced: z/OS® V2R1 and is rolled back to z/OS V1R13, z/OS V1R12, and z/OS V1R11 with APAR OA38230.