Installation and User's Guide

By default, the Tivoli Storage Manager client will not reset the last access date ofany backed up or archived files to their original value following the backup orarchive operation. This option requires extra processing time during backup andarchive for each file that is sent to the Tivoli Storage Manager server, so it shouldonly be enabled when necessary.Any application that touches a file can implicitly cause the last access date of thefile to change to the time that the application touches it. This is a function of thefile system, not the application. Because of this, when the client backs up orarchives a file, it can trigger an update to the last access date of the file. This cancause problems for other applications such as Storage Resource Management(SRM), whose processing relies on accurate last access dates.If you have enabled open file support, the last access date for files is alwayspreserved regardless of the setting for preservelastaccessdate. When using open filesupport, leave this option disabled.Use this option with the incremental, selective, orarchive commands.Note:1. This option only applies to files; it does not apply to directories.2. Resetting the last access date incurs additional overhead that impact backupand archive performance. The last access date should be reset only if you areusing other another application, such as a Storage Resource Management (SRM)that relies on accurate last access dates.3. The last access date cannot be preserved on files which are write protectedeither by the read-only attribute or by a restrictive NTFS security permission.4. You cannot reset the last access date of read-only files. Thepreservelastaccessdate option ignores read-only files and does not change theirdate.Supported ClientsThis option is valid for all Windows clients.The server can also define this option.Options FilePlace this option in the client options file (dsm.opt). You can set this option on theBackup tab of the Preferences editor.Syntax►►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.Chapter 12. Processing options 433