HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 131

Basic Backup Application Configuration, IBM Tivoli Storage Manager

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as the current total amount of physical tape (already compressed) divided by the virtual cartridge sizes. ◦ If this virtual library will be a replication target, it must contain at least as many slots as the total number of source slots that are replicating to this target. See "Replication Preparation" (page 133). • Gather the required basic device management settings: ◦ TCP/IP settings for device management (node0). You only need TCP/IP settings for the other nodes if you will be using replication (every node requires a TCP/IP address for replication). ◦ SNMP or email notification settings. ◦ NTP server settings. Basic Backup Application Configuration The following steps highlight the considerations for designing the changes needed in the backup application to optimize for use with a VLS. Additional guidelines are available in the HP backup application implementation guides at http:// www.hp.com/go/ebs detailing: • HP Data Protector • IBM Tivoli Storage Manager • EMC NetWorker • Symantec Backup Exec • Symantec NetBackup • Set the tape block size to 256 KB for all VLS tape drives. • Disable multiplexing/interleaving on all backup jobs to the VLS. Multiplexing will dramatically reduce performance for restores and will also reduce deduplication performance. Instead of multiplexing, create more virtual tape drives and use multistreaming (so that backup jobs run multiple streams concurrently to multiple tape drives). • Disable client backup compression because this will defeat target-based deduplication/compression in the backup device • Tape Retention Planning: Create media pools based on retention period. Mixing retention periods will prevent cartridge expiration reclamation and will lead to poor storage utilization. Space used for the shorter retention backup is not reclaimed until all backups on the tape are expired. That is, the backup application cannot reuse/reformat the tape until all backups have exceeded their protection period. • Identify clients on the SAN that are currently performing LAN-based backup but could be converted to LAN-free backup to improve performance. See "LAN-free Backups" (page 30). Device Configuration Preparation 131

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as the current total amount of physical tape (already compressed) divided by the virtual
cartridge sizes.
◦
If this virtual library will be a replication target, it must contain at least as many slots as
the total number of source slots that are replicating to this target. See
“Replication
Preparation” (page 133)
.
•
Gather the required basic device management settings:
TCP/IP settings for device management (node0). You only need TCP/IP settings for the
other nodes if you will be using replication (every node requires a TCP/IP address for
replication).
◦
◦
SNMP or email notification settings.
◦
NTP server settings.
Basic Backup Application Configuration
The following steps highlight the considerations for designing the changes needed in the backup
application to optimize for use with a VLS.
Additional guidelines are available in the HP backup application implementation guides at
h
t
tp://
w
w
w
.hp
.co
m/go/eb
s
detailing:
•
HP Data Protector
•
IBM Tivoli Storage Manager
•
EMC NetWorker
•
Symantec Backup Exec
•
Symantec NetBackup
•
Set the tape block size to 256 KB for all VLS tape drives.
•
Disable multiplexing/interleaving on all backup jobs to the VLS. Multiplexing will dramatically
reduce performance for restores and will also reduce deduplication performance. Instead of
multiplexing, create more virtual tape drives and use multistreaming (so that backup jobs run
multiple streams concurrently to multiple tape drives).
•
Disable client backup compression because this will defeat target-based
deduplication/compression in the backup device
•
Tape Retention Planning: Create media pools based on retention period. Mixing retention
periods will prevent cartridge expiration reclamation and will lead to poor storage utilization.
Space used for the shorter retention backup is not reclaimed until all backups on the tape are
expired. That is, the backup application cannot reuse/reformat the tape until all backups have
exceeded their protection period.
•
Identify clients on the SAN that are currently performing LAN-based backup but could be
converted to LAN-free backup to improve performance. See
“LAN-free Backups” (page 30)
.
Device Configuration Preparation
131