This section describes how to define and initialize a system definition data set (CSD) that CICS® needs to store definitions of the resources that it uses.
This section also discusses some considerations regarding the use of the CEDA transaction, particularly when a CSD is being shared by more than one CICS region.
You may have used the CEDA transaction already, when running the interactive installation verification procedures (IVPs) after installing CICS. If you ran any of the IVPs (for example, the jobs called DFHIVPBT or DFHIVPOL), you also used a CSD. For information about DFHIVPBT and DFHIVPOL, see the CICS Transaction Server for z/OS® Installation Guide. Note that the CSD created by the IVPs is limited in size, and initialized with the CICS-supplied resource definitions only.
A CSD is mandatory for some resource definitions. If you are creating a CSD for the first time, go through the steps listed below under Creating a CSD: The remainder of this section describes these steps in more detail.
If you are already using a CSD with a previous release of CICS, upgrade your CSD to include CICS resource definitions new in CICS Transaction Server for z/OS, Version 3 Release 1. For information about upgrading your CSD, see the CICS Operations and Utilities Guide.
You can run the DFHCSDUP offline utility as a batch job to read from and write to the CSD. You should give UPDATE access to the CSD to only those users who are permitted to use the DFHCSDUP utility.
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