SMP/E uses the following data sets as a database for its processing: the CSI, PTS, SCDS, MTS, and STS. It is important to understand how SMP/E uses each of these data sets and how they are related.
The following is a description of each data set:
- The CSI data set is a VSAM data set that serves as the
primary data set for SMP/E. SMP/E divides the CSI into multiple partitions
using the VSAM key structure. Each partition is referred to as a zone. There are three types of zones:
- Global zone
- A single global zone is used to record information about SYSMODs that have been received. The global zone also contains information enabling SMP/E to access the other two types of zones, and information allowing you to tailor parts of SMP/E processing.
- Target zones
- One or more target zones are used to record information about the status and structure of the operating system (or target) libraries.
- Distribution zones
- One or more distribution zones are used to record information about the status and structure of the distribution libraries.
In Figure 1 the CSI data set is pictured as one data set. In fact, you can group all your zones within one VSAM data set (up to 32766 zones per data set), or divide them up into multiple VSAM data sets, even one zone per data set. The choice is yours; it is based on such factors as:- Which packs the associated target and distribution libraries are on. It is advisable to keep the associated zone on the same pack as the libraries controlled from the zone, so when the pack is dumped, the data and description are kept synchronized.
- The organization of your shop. Totally separate service organizations for different products may require many separate data sets.
Figure 1 illustrates the same zone relationship as Figure 1, with the CSI spread across multiple VSAM data sets.
- The PTS is used strictly as a storage data set for SYSMODs. A SYSMOD is read from the SMPPTFIN data set and stored directly on the PTS without any modifications or SMP/E information. It is, therefore, related to the global zone in that both data sets contain information about the received SYSMODs. You can, therefore, look at the global zone and the PTS as a pair of data sets that must be processed (such as scratched, saved, or modified) concurrently.
- The SCDS is used by SMP/E to store backup copies of modified target zone entries during apply processing of a SYSMOD with inline JCLIN. Thus, the SCDS is directly related to a specific target zone, and each target zone must have its own SCDS.
- The MTS is a library in which SMP/E stores updated copies of macros during apply when no other target macro library is identified. The MTS is, therefore, related to a specific target zone, and each target zone must have its own MTS data set.
- The STS is a library in which SMP/E stores updated copies of source during APPLY when no other target source library is identified. The STS is, therefore, related to a specific target zone, and each target zone must have its own STS data set.
