Preservelastaccessdate

Use the preservelastaccessdate option to specify whether a backup or archive operation changes the last access time.

A backup or archive operation can change the last access time of a file. After an operation, the Tivoli® Storage Manager client can reset the last access time to the value before the operation. The last access time can be preserved, rather than modified, by the backup-archive client. Resetting the last access time requires extra processing for each file that is backed up or archived.

If you enable open file support, the last access date for files is always preserved regardless of the setting for preservelastaccessdate. When open file support is enabled, do not use the preservelastaccessdate option.

Use this option with the incremental, selective, or archive commands.

Note:

This option applies only to files; it does not apply to directories.
Resetting the last access date affects backup and archive performance.
Resetting the last access date can affect applications that rely on accurate last-access dates such as a Storage Resource Management (SRM) application.
On file systems that are not managed by the Tivoli Storage Manager Space Management client or when nonroot users back up or archive, the ctime attribute is reset. The last changed time and date (ctime) attribute is reset to the date and time of the backup or archive operation.
The updatectime option takes precedence over the preservelastaccessdate option. If both options are set to yes, the preservelastaccessdate option is ignored
On file systems that are not managed by the Tivoli Storage Manager Space Management client, do not use preservelastaccessdate yes and the GPFS™ mmbackup command. The mmbackup command and preservelastaccessdate yes selects all files for each backup operation.
The last access date cannot be preserved on files that are write-protected either by the read-only attribute or by a restrictive NTFS security permission.
You cannot reset the last access date of read-only files. The preservelastaccessdate option ignores read-only files and does not change their date.

Supported Clients

AIX operating systems HP-UX operating systems Linux operating systems Oracle Solaris operating systems This option is valid for all UNIX and Linux clients except Mac OS X.

Windows operating systems This option is valid for all Windows clients.

The server can also define this option.

Options File

AIX operating systems HP-UX operating systems Linux operating systems Oracle Solaris operating systems Place this option in the client user options file (dsm.opt). You can set this option on the Backup tab of the Preferences editor.

Windows operating systems Place this option in the client options file (dsm.opt). You can set this option on the Backup tab of the Preferences editor.

Syntax


                           .-No--.   
>>-PRESERVELAstaccessdate--+-----+-----------------------------><
                           '-Yes-'

Parameters

No: A backup or archive operation can change the last access date. This value is the default.
Yes: A backup or archive operation does not change the last access date.

Examples

Options file:: preservelastaccessdate yes
Command line:: Incremental /proj/test/test_file -preservelastaccessdate=yes
Command line:: dsmc incr c: e: f: -preservelastaccessdate=yes