GRSRNLxx (global resource serialization resource name lists)

GRSRNLxx consists of three resource name lists (RNLs). When a global resource serialization complex is active, the system uses these RNLs to determine how to treat the resources defined in the RNLs. The RNLs are:

The SYSTEM inclusion RNL. The system treats each resource named in this RNL as a global resource if an ENQ or a DEQ macro instruction for the resource specifies a scope of SYSTEM.
The SYSTEMS exclusion RNL. The system treats each resource named in this RNL as a local resource if an ENQ, DEQ, or RESERVE macro instruction for the resource specifies a scope of SYSTEMS.
The RESERVE conversion RNL. The system suppresses a hardware reserve for each resource named in this RNL if a RESERVE macro instruction requests the use of the resource.

Note: Specifying RNL=NO on the ENQ macro will bypass all RNL processing. See z/OS MVS Programming: Assembler Services Guide for information about the ENQ macro.

Use the SET GRSRNL command to change the RNL list while the system is active. For more information, see z/OS MVS System Commands.

See z/OS MVS Planning: Global Resource Serialization for detailed information about global resource serialization, RNLs, and the RNL syntax checker. The RNL syntax checker lets you check the syntax of GRSRNL parameters specified on the JCL and resource names specified in GRSRNLxx.