Setting up shared data sets, CSD and SYSIN
The system definition data set (CSD) and the SYSIN data set are typically shared between more than one CICS® region. The CSD stores resources definitions and the SYSIN data set contains start up information for a region, such as system initialization parameter values. Use the supplied jobs to create these data sets.
About this task
A CSD is required for most resource definitions. If you are creating a CSD for the first time, go through the steps listed in Planning your CSD configuration. 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 that are new in CICS Transaction Server for z/OS®, Version 5 Release 5 . For information about upgrading your CSD, see System definition file utility program (DFHCSDUP).
The SYSIN data set contains information that configures CICS during start up. You can create a data set to share a standard set of start up parameters across your CICS regions, and override these values as required on the start up job stream for particular CICS regions. CICS supplies the DFHCOMDS job to create a SYSIN data set. For more information, see Creating the CICS data sets.