Controlling CICS Resources

ESMAC enables you to view, create and modify the resources required by a CICS application running on an enterprise server. An enterprise server equates to a CICS region. When a CICS region starts, it is typically initialized with a system initialization table (SIT). The SIT defines various startup parameters, as well as defining which startup lists are invoked. The startup lists define which groups are used by the CICS applications in this region. The groups in turn define the resources (for example, file control tables and program processing tables) to be loaded for use by applications.

You can maintain the following resources

• SITs
• Startup lists
• Groups
• Tables

This includes not just the resources used by this enterprise server, but all the resources defined in the resource definition file for this enterprise server.

ESMAC provides flexibility in the way you view resources. You can view:

• Active resources - the resources that are currently active on the enterprise server. An enterprise server is associated with a SIT, and when the SIT is initialized, it invokes its startup list, which contains the groups in which resources are stored. These then become active.

  The Active resources category includes two items that are not strictly speaking resources:

  • ICE, which stands for interval control elements, CICS-related events that are scheduled to happen in the future
  • Resource locks
• Resources by group - the resources in groups currently defined in the enterprise server's resource definition file.
• All the SITs in the resource definition file.
• All the startup lists in the resource definition file.
• Resources used by the current startup list - resources defined in groups that are defined in the startup list initiated by the SIT for the enterprise server.
• Resources by type - all resources, listed according to type (FCT, DCT, and so on).
• Detailed information for any resource.

If you have suitable permissions you can also:

• Modify resources.
• Delete resources.
• Create new resources, such as tables and groups. You can do this in two ways:
  • Create a new resource using the values of an existing resource.
  • Create a completely new resource. How you do this depends on whether you are creating a new table (FCT, DCT, and so on) or another resource (such as a group or SIT).
• Format and view a dump of a resource.
• Delete interval control elements and data queues