Tivoli® Storage Manager can
process network-attached storage (NAS) file-server data that is accessed by
using the Common Internet File System (CIFS) protocol.
You can use the following methods to back up and recover data on
NAS devices:
- Use
a Tivoli Storage Manager backup-archive
client to back up and restore data, by using CIFS to access files
from the backup-archive client. Data can be stored on the Tivoli Storage Manager server
with file-level granularity, by using the progressive-incremental
backup method. The data is stored in the Tivoli Storage Manager storage
hierarchy and can be migrated, reclaimed, and backed up to a copy
storage pool.
This method increases processor usage when the Tivoli Storage Manager client
accesses individual files. The method requires that data flow through
the Tivoli Storage Manager client.
This method also requires that the data flows through the Tivoli Storage Manager server
unless a LAN-free configuration is used.
- Use
the snapdiff option to mitigate the performance problems
of CIFS backup. This option stores data with file-level granularity by
using progressive incremental backup for CIFS.
- Use a Tivoli Storage Manager backup-archive client
that is running on the NAS device, if you can use external programs
with the NAS operating system.
This
method decreases processor usage of CIFS. Data can be stored on the Tivoli Storage Manager server
with file-level granularity by using progressive-incremental backup.
The data is stored in the Tivoli Storage Manager storage
hierarchy and can be migrated, reclaimed, and backed up to a copy
storage pool. This method requires that data flow through the Tivoli Storage Manager client.
This method also requires that the data flows over a network and through
the Tivoli Storage Manager server
unless a LAN-free configuration is used.
- Use NDMP with Tivoli Storage Manager. File systems
are backed up as full images (all files) or differential images (all
files that changed since the last full backup). Backed up images are
stored on a tape device that is accessed by the NAS file server. This
method provides high performance because there is no data flow through
a Tivoli Storage Manager client
or server. Data that is backed up to Tivoli Storage Manager by
using NDMP cannot be migrated, reclaimed, or backed up to a copy storage
pool.
The following limitations exist for NAS file server data when it
is accessed by using CIFS: