Using the Basic Components › DASD Buffer

DASD Buffer

The DASD buffer or cache is defined as a DFSMS storage group or a list of DASD volumes. We recommend devices that provide many concurrent high-performance sequential operations and DASD control units with large numbers of channel paths.

You can share the DASD volumes with other applications, but we do not recommend it. Other applications accessing these volumes can cause significant contention when the DASD buffer is supporting high activity tape emulation.

The DASD buffer is where VSAM linear data sets (LDSs) are defined to hold the application data that is written to a Virtual Volume.