The objective of the HIPERFILE (High Performant Files) concept is to increase the speed of file accesses and to avoid or eliminate I/O bottlenecks by buffering the data in the main memory using the software product DAB (Disk Access Buffer).
The purpose of DAB (Disk Access Buffer) is to provide faster access to disk files by means of caching in the fast main memory (MM).
Main memory is a volatile storage medium that is suitable primarily for the caching of read accesses as well as for write jobs to temporary files. Unsaved write data in the buffer is lost after a system crash if it is on a volatile storage medium.
With BS2000 V21.0A, there is only one variant of the HIPERFILE concept, the ADM-PFA caching (administrator-controlled Performant File Access), in which the systems support uses commands to specify which files or volumes are to be buffered in which cache medium and which caching mode (read, write or read/write mode) is to be used.