Updating MSC resource definitions in the IMSRSC repository

You can update MSC resource definitions for one or more new or existing IMS systems in your IMSplex by using the IMS type-2 UPDATE commands. The updated MSC resource definitions can then be automatically exported to the IMSRSC repository.

Before you update MSC resource definitions by using the UPDATE commands, ensure that the following prerequisites are met:
  • The IMSRSC repository is defined.
  • Dynamic resource definition for MSC resources is enabled.
  • The IMSRSC repository is enabled for MSC resources.
  • AUTOEXPORT=AUTO or REPO is specified in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB member.
  • MODBLKS=DYN is specified either in the COMMON_SERVICE_LAYER section of the DFSDFxxx PROCLIB member or in the DFSCGxxx member of the IMS PROCLIB data set.

Procedure

Update MSC resources such as definitions for MSC physical links, logical links, and logical link paths by using the appropriate UPDATE command for the type of resource definition that you want to update.
The UPDATE command must be issued to each IMS in each IMSplex for which the resource definitions are to be exported to the repository. You can use the ROUTE keyword on the OM API to specify the IMS to which the command is routed.

After an MSC resource definition is updated, the resource is automatically exported to the IMSRSC repository at the next IMS checkpoint. The IMS checkpoint can be initiated with the /CHECKPOINT command, or the /CHECKPOINT FREEZE command, or automatically by the IMS system.

If you use the /CHECKPOINT command to initiate an IMS checkpoint, the command must be routed to each IMS in each IMSplex in which the MSC resources are defined.