NetVault Server: 9.2 Windows 2008 R2
NDMP Plugin: 7.6.11
NDMP Consolidation 5.7.5 Patch Installed: No
Filer: NetApp OnTap 8.1.4P1 7-Mode
Backup Device: IBM 3573 tape library attached to the NetVault Server via SCSI.
As you can see from the NetVault Backup NAS and NDMP compatibility section of the NetVault Backup 10 Compatibility Guide on the following link; you will also need to install the NDMP Consolidation 5.7.5 Patch to work with OnTap 8.x and above:
In this NetVault Backup configuration, the backups are channeled over the network, which can be a bottleneck itself.
Backing up millions of small files will also have an impact on the performance.
To increase the performance, please consider attaching the backup devices directly to the Filers via a FC network and then setup the drives to be shared with all the Clients.
Note: You will need to purchase a Dynamically Shared Drive (DSD) license per tape library drive you wish to share drives.
NetVault instructs the Filer to use its backup utility to transfer the needed data to the target drive. Further information and suggestions to help with the NDMP performance are in the following KBA:
WARNING!!! Disabling these options may result in Direct Access Restore, and the ability to select individual items for restore, becoming IMPOSSIBLE. This means an entire saveset (backup) may have to be restored, not individual items, or that the entire saveset (backup) may have to be read to restore a single file. The time to restore will increase significantly. Carefully consider backup and restore requirements before applying any changes to the NDMP backup options.
If the Filer OnTap version has recently been upgraded, then make sure the Filer has been rebooted. If the Filer is not rebooted after the OnTap upgrade, then performance issues can occur.