Managing NetBackup
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Maximize Use of Devices
Use multiplexing. Also, allow as many concurrent jobs per storage unit, class,
and client as possible without causing server, client, or network performance
problems.
Prevent Backups From Monopolizing Devices
Limit the number of devices that NetBackup can use concurrently for each
class or the number of drives per storage unit. Another approach is to not put
some devices under Media Manager control.
You can also place some drives in a down state or limit the number used
concurrently in a specific storage unit. For example, if there are four drives in a
robot, allow only two to be used concurrently.
Server Independent Restores
This section explains how to restore files by using a NetBackup server other
than the one that was used to write the backup. This is called a server
independent restore and allows easier access to data for restores in
multi-server environments and also provides better failover and disaster
recovery capabilities.
NetBackup has a master and slave server architecture that allows storage
devices to be located on multiple servers (can be either separate storage
devices or a shared robot). For successfully completed backups, the NetBackup
image catalog stored on the master server contains an entry that defines the
server (master or slave) to which each backup was written. In addition,
information specific to the backup media is held within both the master server
image catalog (in the attribute file for each backup) and in the media catalog
on the master or slave server that was used during the backup.
Due to the existence of the media catalog on each server where backups are
written, restoring data through a device on another server is more involved
than other restores but can be accomplished by using the methods described in
this section. These methods do not require you to expire and import backup
images; although, that can be useful in some instances (see “Related Topics”
later in this section).
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT
