Shared resources for intercommunication

Resources that reside on a remote system, but are accessed by a local CICS® system, have to be defined on both the remote and local systems. To avoid duplicating definitions in the CSD files for the local and remote systems, you can create resource definitions on a CSD file that is shared by the local and remote systems. This reduces disk storage and maintenance, because you require only one CSD file record for each shared resource.

If you decide to use dual-purpose resource definition, you may want to consider reorganizing your resources within your resource definition groups. For example, you might currently have two groups: one containing all the resources for a CICS transaction-owning region (TOR), and one containing all the resources for a CICS application-owning region (AOR).

When you use shared resource definitions, you can have three groups, with the first group containing resources specific to the TOR, the second group containing resources specific to the AOR, and the third group containing resources to be installed in both the TOR and the AOR.

These resources should be defined as both local and remote. When the definition is installed on the TOR, CICS compares the SYSIDNT name with the REMOTESYSTEM name. If they are different, a remote transaction definition is created. When the definition is installed on the AOR, CICS compares the REMOTESYSTEM name with the SYSIDNT name. If they are the same, a local transaction definition is installed.