Installation and User's Guide

Management classes and copy groupsA management class is a collection of backup and archive copy groups thatestablishes and contains specific storage management requirements for backing upand archiving data.An administrator can establish separate management classes to meet the backupand archive requirements for different kinds of data, such as:v System data that is critical for the business.v Application data that changes frequently.v Report data that Management reviews monthly.v Legal information that must be retained indefinitely, requiring a large amount ofdisk space.Most of the work you do with storage management policies is with managementclasses. Each file and directory that you back up, and each file that you archive, isassociated with (or bound to) a management class, as follows:vvvIf your data is not associated with a management class, Tivoli Storage Manageruses the default management class in the active policy set.When backing up directories, you can specify a management class with aninclude statement or the dirmc option. If you do not specify a management class,Tivoli Storage Manager uses the management class in the active policy setspecifying the longest "Retain Only" retention period. If there are multiplemanagement classes that meet this criteria, Tivoli Storage Manager uses the lastone found, in alphabetical order.For archiving directories, you can specify a management class with aninclude.archive statement or the archmc option. If you do not specify amanagement class, the server assigns the default management class to thearchived directory. If the default management class has no archive copy group,the server assigns the management class that currently has the archive copygroup with the shortest retention time.You can use include statements in your include-exclude list to associate files withmanagement classes. In your client options file, you can associate directories with amanagement class, using the dirmc option.Within a management class, the specific backup and archive requirements are incopy groups. Copy groups define the specific storage management attributes thatdescribe how the server manages backed up or archived data. Copy groupsinclude both backup copy groups and archive copy groups. A management class canhave one backup copy group, one archive copy group, both, or neither.A backup copy group contains attributes that are used during the backup process todetermine:v How many days must elapse before a file is backed up again.v How a file is processed during a backup if it is in use.It also contains attributes to manage the backup versions of your files on theserver. These attributes control:v On which media type the server stores backup versions of your files anddirectories.v How many backup versions the server keeps of your files and directories.v How long the server keeps backup versions of your files and directories.v How long the server keeps inactive backup versions.v How long the last remaining inactive version of a file is kept.236 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide