Symantec NetBackup, Manual

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For example, assume that you have 100 important clients, 500 regular clients,
and four media servers. You can use two media servers to back up your most
important clients and two media servers to back up your regular clients.
The following example describes how to configure a favorable client-to-server
ratio:
■
Configure the media servers for AdvancedDisk and configure the storage.
■
Configure a disk pool.
■
Configure a storage unit for your most important clients (such as STU-GOLD).
Select the disk pool. Select Only use the following media servers. Select two
media servers to use for your important backups.
■
Create a backup policy for the 100 important clients and select the STU-GOLD
storage unit. The media servers that are specified in the storage unit move the
client data to the storage server.
■
Configure another storage unit (such as STU-SILVER). Select the same disk
pool. Select Only use the following media servers. Select the other two media
servers.
■
Configure a backup policy for the 500 regular clients and select the STU-SILVER
storage unit. The media servers that are specified in the storage unit move the
client data to the storage server.
Backup traffic is routed to the wanted data movers by the storage unit settings.
Note:
NetBackup uses storage units for media server selection for write activity
(backups and duplications) only. For restores, NetBackup chooses among all media
servers that can access the disk pool.
About throttling traffic to the media servers
You can use the Maximum concurrent jobs settings on disk pool storage units to
throttle the traffic to the media servers. Effectively, this setting also directs higher
loads to specific media servers when you use multiple storage units for the same
disk pool. A higher number of concurrent jobs means that the disk can be busier
than if the number is lower.
For example, two storage units use the same set of media servers. One of the
storage units (STU-GOLD) has a higher Maximum concurrent jobs setting than
the other (STU-SILVER). More client backups occur for the storage unit with the
higher Maximum concurrent jobs setting.
Configuring AdvancedDisk
Configuring an AdvancedDisk storage unit
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