SCOPE= parameter for procedures

Specifies whether intersystem sharing is to be performed. This parameter must always be specified because no default value exists. Valid values are LOCAL, GLOBAL, and NODISCON.

If SCOPE=LOCAL is specified, sharing is limited to intrasystem, and XCF and SLM are neither required or used. If SCOPE=GLOBAL or SCOPE=NODISCON is specified, intersystem sharing is performed, and both XCF and SLM are required.

With NODISCON, there is less impact on other systems when an IMS fails because z/OS® is not required to perform certain recovery actions when IRLM DISCONNECTS from the group. NODISCON can also mean that IMS restarts more quickly after an IMS terminates normally or abnormally because it does not have to wait for IRLM to rejoin the IRLM data sharing group. Under normal situations, IRLM Disconnects from the group ONLY when there are no IMS systems identified to it. NODISCON has no affect as long as there is at least one IMS identified to the IRLM.

Sharing can be performed between up to 248 IRLMs on a single z/OS image. This can be done for pre-installation testing. In this case, SCOPE=GLOBAL must be specified for all IRLMs.