VERITAS NetBackup White Paper page 19

The properties that the administrator configures for each class include:
• Client List — lists the set of clients in the class. When a new client is added to VERITAS NetBackup, the administrator
can simply add the client's host name to the appropriate class and the client software can optionally be installed
automatically over the network.
• File List — lists the set of files to include in automatic backup operations for the class. It is not a requirement that all
files on the list exist on all clients and it is often convenient to make the file list a superset of the desired files. The file
list does not apply to user-directed backups because the user personally selects those files at the time of the backup.
The administrator or user can also specify a list of files to exclude from each client backup. The exclude list is not part
of the class definition and is unique for each client.
• Schedules — lists the set of schedules pertaining to the class (refer to the next section for a detailed description of
schedules).
• Storage Unit — specifies the type of storage device to receive the file backups. This is optional. If unspecified,
backups and archives can go to any available storage unit.
• Volume Pool — specifies the set of volumes (media) to use for storing the backups. If unspecified, backups and
archives use the default NetBackup volume pool.
• Class Attributes — the following are class-specific attributes
• Maximum Jobs per Class — specifies the number of client jobs from this class that can be performed concurrently.
Administrators can use this parameter to "balance" network load.
• Collect True Image Recovery Information — specifies whether NetBackup will collect the information necessary
to support true image recovery of directories saved by clients in this class.
• Class Type — specifies the type of class you are configuring. You will use the Standard class type for most UNIX
clients. The other class types cover special cases. For example, you would specify Exchange backup type to backup
Microsoft Exchange clients or Oracle-OEBU backup type to back up ORACLE databases on clients that have ORACLE.
• Encryption — specifies whether or not to enable client-level encryption during backup operations. Both US
Domestic (56 bit DES) or international (40 bit DES) encryption types are supported. Encryption is a separately priced
NetBackup option.
• Image Compression — specifies whether or not to use software image compression during backup operations.
• Backup Network Drives — specifies whether to allow backups of remote files that are NFS mounted on the client.
• Cross Mount Points — specifies whether or not VERITAS NetBackup is to cross file systems to back up directory
paths and files.
• Priority — specifies the priority of backups for this class relative to the other classes. This is useful to ensure that the
most important data is backed up first.
• Active — specifies whether or not NetBackup will allow backups or archives for this class. This is useful for
temporarily deactivating a class during, for example, network troubleshooting or repair.
All class definitions are stored in the configuration database on the master server. In networks with more than one storage
domain of VERITAS NetBackup servers, clients can belong to classes on more than one master server. Although clients will
normally use only one master server, the ability to use others can be an essential feature if a client's regular master server
goes down and there is critical data to back up.
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