gtpg1m0h | General Information |
The TPF system divides storage into three classes:
This is program-addressable storage in which instructions and data can be stored. A Virtual File Access (VFA) facility allows a user-defined set of file storage records and programs to reside in main storage for performance purposes.
This storage is maintained on direct access storage devices (DASDs). It is used to hold programs and data that must be readily available, such as backup data for system recovery.
This storage is used to hold data and programs that have limited retrieval requirements during the life of an entry. Such data is processed at a noncritical time, usually in a system other than the TPF system. The devices used for auxiliary storage are tapes and disk files.