

System Setup › Multisystem Requirements
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.
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