Disable a platform to make it temporarily unavailable. If you no longer require a platform, disable and discard it.
Before you discard a platform, you must first disable and discard all the installed applications in the platform, but you do not need to delete the application definitions (APPLDEF resources). For instructions to disable and discard applications, see Making unavailable, disabling, and discarding applications.
Before you discard a platform, you must also shut down the active CICS® regions in created region types, that is, CICS regions whose CICSPlex® SM topology was defined when the platform was created. The lifecycle of these CICS regions is associated with the lifecycle of the platform, and they become unavailable when the platform is discarded. CICS regions in adopted region types, whose CICSPlex SM topology was set up independently of the platform, do not need to be shut down. When the platform is discarded, these CICS regions are restored to their status before the installation of the platform.
To shut down a CICS region, in the Regions view, right-click the CICS region and select Shutdown. Refresh the Regions view and confirm that the status of the region is INACTIVE. Alternatively, shut down the CICS region using CICSPlex SM or CICS commands.
You can disable a platform while applications are still installed in the platform, and while CICS regions are active in the platform.
When you disable or discard a platform, all the CICS bundles that were deployed with the platform are also disabled or discarded. You can remove an individual CICS bundle that was deployed with the platform, without disabling or discarding the platform. For instructions to do this, see Removing a CICS bundle from a platform.
The platform is disabled or discarded, and all CICS bundles that were installed with the platform bundle are also disabled or discarded.
When you discard the platform, CICS system groups (CSYSGRPs) that had been adopted as region types are restored to their status before the installation of the platform, and the adopted CICS regions continue to exist in the CICSplex. However, for created CICS regions in created region types, the system definitions (CSYSDEF) for the CICS regions are deleted. The created CICS regions can therefore no longer be started because they do not have the required CSYSDEF.