The VSAM files that contain the TP profiles and side information must be defined before you can create TP profiles and side information. The number of files you need to define as well as the size of each file depends on several factors. These topics are discussed in the following sections.

For general information about VSAM files, see z/OS DFSMS Access Method Services Commands.

The person who actually defines the VSAM files should be an experienced VSAM programmer familiar with the restrictions when migrating a VSAM file to another system, the requirements for changing the size of a pre-defined VSAM file, and the ability to view a VSAM KSDS online.