If you have a large NAS (network attached storage) file
system, initiating a backup at a directory level will reduce backup
and restore times and provide more flexibility in configuring your
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
sub-trees 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 will occur
on the
Tivoli® Storage
Manager server
when the new file space is backed up. See the
Administrator's Reference for
more information about virtual file space mapping commands.
Note: Virtual
file space mappings are only supported for NAS nodes.