Multisystem Requirements

When setting up your multisystem environment consider the following requirements:

The Global VCAT and BSDS must be allocated on separate DASD volumes shared by all systems.
If multiple CA Vtape Complexes will be defined, the Global VCAT and BSDS1 data sets pertaining to the different Complexes must be allocated on separate DASD volumes shared by all systems.
The DASD buffer must be on shared DASD to allow Virtual Volumes to be read and written by all CA Vtape Subsystems in the same Complex.
The shared DASD buffer must be configured to provide adequate performance for each CA Vtape Subsystem in the same Complex.
The ICF catalog containing the DASD buffer and Externalized Virtual Volume entries must be on shared DASD and connected to all systems in the same Complex.
Sysplex is supported, but not required. If available, its features can be exploited to reduce Recall times.
Cross-system enqueue propagation is not required, but will be used, if available, by Externalization, Recall, and Recycle to resolve Backstore Tape contention.
If a Tape Management System is installed, all Subsystems in the same CA Vtape Complex should share a common Tape Management System Database.
If Subsystems on different systems, but in the same Complex, will be configured as Externalization or Recall Servers, the Backstore Tapes must be shared across those systems.