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

PreservelastaccessdateAny application that touches a file can implicitly cause that file’s last access date tochange to the time that the application touches it. This is a function of the filesystem, not the application. Because of this, when the client backs up or archives afile, it can trigger an update to the file’s last access date. This can cause problemsfor other applications such as Storage Resource Management (SRM) or HierarchicalStorage Management, whose processing relies on accurate last access dates.Use the preservelastaccessdate option during a backup or archive operation tospecify whether to reset the last access date of any specified files to their originalvalue following the backup or archive operation. By default, the Tivoli StorageManager client will not reset the last access date of any backed up or archived filesto their original value following the backup or archive operation.Use this option with the incremental, selective, or archive commands.Notes:SupportedOptionsSyntax1. This option only applies to files; it does not apply to directories.2. Resetting the last access date incurs additional overhead that can impactbackup and archive performance. The last access date should be reset only ifyou are using another application, such as a Storage Resource Management(SRM) or Hierarchical Storage Management that relies on accurate last accessdates.3. You cannot reset the last access date of read-only files. Thepreservelastaccessdate option ignores read-only files and does not change theirdate.ClientsThis option is valid for all UNIX and Linux clients.FilePlace this option in the client user options file (dsm.opt). You can set this option onthe Backup category of the Preferences editor.►►PRESERVELAstaccessdateNoYes►◄ParametersNo Specifies that the Tivoli Storage Manager client will not reset the last accessdate of any backed up or archived files to their original value following thebackup or archive operation. This is the default.Yes Specifies that the Tivoli Storage Manager will reset the last access date of anybacked up or archived files to their original value following the backup orarchive operation.316 IBM Tivoli Storage Manager for UNIX and Linux: Backup-Archive Clients Installation and User’s Guide