Directory-level backup and restore operations
If you have a large NAS file system, initiating a backup at a directory level reduces backup and restore times and provides more flexibility in configuring NAS backups. By defining virtual file spaces, a file system backup can be partitioned among several NDMP backup operations and multiple tape drives. You can also use different backup schedules to back up subtrees of a file system.
The virtual file space name cannot be identical to any file system on the NAS node. If a file system is created on the NAS device with the same name as a virtual file system, a name conflict occurs on the IBM
Storage Protect server when the new file space is backed up. For instructions about issuing commands for mapping virtual file spaces, see DEFINE VIRTUALFSMAPPING (Define a virtual file space mapping).
Restriction: Virtual file space mappings are supported only for NAS nodes.