IBM Tivoli Storage Manager for UNIX and Linux: Backup-Archive ...

v You specify a different management class in an Include statement to change themanagement class for the file. The backups are managed based on the oldmanagement class until you run another backup.v Your administrator deletes the management class from your active policy set.The default management class is used to manage the backup versions when youback up the file again.v Your administrator assigns your client node to a different policy domain and theactive policy set in that domain does not have a management class with thesame name. The default management class for the new policy domain is used tomanage the backup versions.|||Refer to the IBM Tivoli Storage Manager Administrator’s Guide for your operatingsystem, for more information on how files and directories are associated withmanagement classes.Using a retention grace periodTivoli Storage Manager also provides a backup retention grace period and an archiveretention grace period to help protect your backup and archive data when it isunable to rebind a file to an appropriate management class. The backup retentiongrace period is used when:v You change the management class for a file, but neither the default managementclass nor the new management class contain a backup copy group.v The management class to which a file is bound no longer exists, and the defaultmanagement class does not contain a backup copy group.The backup retention grace period, defined in your policy domain, starts when yourun an incremental backup. The default is 30 days. However, your administratorcan lengthen or shorten this period.When Tivoli Storage Manager manages a file using the backup retention graceperiod, it does not create any new backup versions of the file. All existing backupversions of the file expire 30 days (or the number of days specified in your policydomain) from the day they are marked inactive.Archive copies are never rebound because each archive operation creates adifferent archive copy. Archive copies remain bound to the management classname specified when the user archived them. If the management class to which anarchive copy is bound no longer exists or no longer contains an archive copygroup, the server uses the default management class. If you later change or replacethe default management class, the server uses the updated default managementclass to manage the archive copy. If the default management class does not containan archive copy group, the server uses the archive retention grace period specifiedfor the policy domain.||||||Using event-based policy retention protectionAll management classes with an archive copy group must specify a retentionperiod, for example, the number of days that an archived object will be stored onthe server before being deleted. Event-based policy provides the option ofbeginning the retention period either at the time the object is archived or at a laterdate when an activation event is sent to the server for that object.166 IBM Tivoli Storage Manager for UNIX and Linux: Backup-Archive Clients Installation and User’s Guide