Starting Common Service Layer components enhancement

In IMS 15 with APAR/PTF PH04044/UI60475, IMS is enhanced to automatically start, by using a procedure in an IMS control region, the Common Service Layer (CSL) address spaces in a Resource Manager (RM) environment. More specifically, this enhancement enables IMS to automatically start in an RM environment the Operations Manager (OM), Structured Call Interface (SCI), and RM address spaces of the CSL.

Previously in an RM environment, IMS did not automatically start the OM and SCI address spaces at IMS startup. This was true even if a procedure for the OM or SCI was defined in the IMS PROCLIB data set. In an RM environment, you had to start OM and SCI before you started IMS, manually or through automation, by using the z/OS® START command or JCL. Also previously, you could not start RM by defining a procedure for the RM in the IMS PROCLIB data set. And, IMS did not start RM automatically at IMS startup. Instead, you could start RM only by using the z/OS START command from a z/OS system console or by using JCL.

With this enhancement, IMS automatically starts the OM, RM, or SCI address spaces at IMS start up if a procedure is defined in the IMS PROCLIB data set for the address space, even in an RM environment.

Changes to defining IMS

The RMPROC= parameter is added to the following members of the IMS PROCLIB data set. You can use the RMPROC= parameter to specify the member of the IMS PROCLIB data set that contains the procedure for the RM address space.
  • COMMON_SERVICE_LAYER section of the DFSDFxxx member
  • DFSCGxxx member

Documentation changes

The following table lists the publications that contain new or changed topics for the Starting Common Service Layer components enhancement. Publications that are not impacted by this enhancement are not included in the table.

Table 1. Links to topics that have new or changed content for this enhancement
Publication Links to topics
Release planning
System definition
Operations and automation