Symantec NetBackup, Руководство пользователя

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Table 11-4
OpenStorage 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.)
NetBackup queues jobs until the storage unit is available. If three backup jobs are ready to be
sent to the storage unit and Maximum concurrent jobs is set to two, NetBackup starts the first
two jobs. NetBackup 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 OpenStorage storage unit recommendations
You can use storage unit properties to control how NetBackup moves backup and
duplication data.
For example, you can accomplish the following objectives by using the storage
unit Media server setting:
■
Configure a favorable client-to-server ratio for important clients.
See “About configuring a favorable client-to-server ratio with OpenStorage”
on page 94.
■
Separate SAN client traffic from other traffic.
See “About separating OpenStorage SAN client traffic” on page 95.
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 OpenStorage traffic to the media servers” on page 96.
About configuring a favorable client-to-server ratio with
OpenStorage
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.
Configuring OpenStorage
Configuring an OpenStorage storage unit
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