Table of Contents
Advertisement
18.1.4 Multiple NAS appliances
Multiple NAS appliances can share tape resources if they have Fibre Channel
(FC) access to the drive and if backups are performed via the same Tivoli
Storage Manager server. Depending on the configuration, drives can be shared
with LAN-free backup/restore operations. NDMP operations for backup of NAS
file servers have been enhanced to support the following functions:
Directory-level backup of NAS data, which enables the division of a file
system backup operation among several NDMP backup operations as well as
several tape drives. This enhancement will reduce backup and restore times.
NDMP directory-level backup enables Tivoli Storage Manager to back up
user-created snapshots that are stored as subdirectories, specifically Network
Appliance snapshots.
The NDMP-controlled backups/restores can be performed in full file system
image and differential file system image.
Backup to local tape devices without LAN network data movement.
NDMP isolates backup software from hardware/software changes on NAS
appliances.
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
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 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 will occur on the Tivoli Storage Manager
server when the new file space is backed up.
Note: Virtual file space mappings are supported only for NAS nodes. For
more information about virtual file space mapping commands, see the Tivoli
Storage Manager Administrator's Reference.
Chapter 18. Network Data Management Protocol (NDMP)
587
Advertisement
Table of Contents
