Symantec NetBackup, Manual

Page: 35 / 168

Table 4-5
AdvancedDisk storage unit properties (continued)
Description Property
Specify the maximum number of jobs that NetBackup can send to a
disk storage unit at one time. (Default: one job. The job count can range
from 0 to 256.) This setting corresponds to the Maximum concurrent
write drives setting for a Media Manager storage unit.
NetBackup queues jobs until the storage unit is available. If three
backup jobs are scheduled and Maximum concurrent jobs is set to
two, NetBackup starts the first two jobs and queues the third job. If a
job contains multiple copies, each copy applies toward the Maximum
concurrent jobs count.
Maximum concurrent jobs controls the traffic for backup and
duplication jobs but not restore jobs. The count applies to all servers
in the storage unit, not per server. If you select multiple media servers
in the storage unit and 1 for Maximum concurrent jobs, only one job
runs at a time.
The number to enter depends on the available disk space and the
server's ability to run multiple backup processes.
Warning: A Maximum concurrent jobs setting of 0 disables the storage
unit.
Maximum
concurrent jobs
About AdvancedDisk storage unit recommendations
You can use storage unit properties to control how NetBackup moves backup and
duplication data.
For example, you can configure a favorable client-to-server ratio for important
clients by using the storage unit Media server setting.
See “About configuring a favorable client-to-server ratio” on page 35.
You also can use the storage unit Maximum concurrent jobs setting to control
the backup or the duplication traffic that is sent to the media servers.
See “About throttling traffic to the media servers” on page 36.
About configuring a favorable client-to-server ratio
For a favorable client-to-server ratio, you can use one disk pool and configure
multiple storage units to separate your backup traffic. Because all storage units
use the same disk pool, you do not have to partition the storage.
35 Configuring AdvancedDisk
Configuring an AdvancedDisk storage unit