Administrator's Reference

SET LOGMODE (Set Mode for Saving Recovery Log Records)

Use this command to determine how long TSM saves records in the recovery log and what kind of database recovery you can use. You cannot change the log mode during a database backup.

Privilege Class

To issue this command, you must have system privilege or unrestricted storage privilege.

Syntax

>>-Set LOGMode-+- Normal------+--------------------------------><
               '- Rollforward-'
 

Parameters

Normal
Specifies that TSM saves only the records needed to restore the database to the time of the last backup (point-in-time recovery). Changes made to the database after the last backup cannot be recovered. This is the default.

In NORMAL mode, you cannot use a database backup trigger.

Rollforward
Specifies that TSM saves the records needed to restore the database to its most current state (roll-forward recovery). You can use a database backup series created in ROLLFORWARD mode for either point-in-time or roll-forward recovery.

In ROLLFORWARD mode, you can use the database backup trigger. If the trigger is defined when you change to ROLLFORWARD mode, TSM immediately runs a full backup. If the trigger is not defined, your next database backup must be a full backup. If you attempt an incremental backup, the operation fails.

Examples

Task

Change the log mode from roll-forward to normal.

Command:
set logmode normal

Related Commands

Table 256. Commands Related to SET LOGMODE

Command Description
BACKUP DB Backs up the TSM database to sequential access volumes.
DEFINE DBBACKUPTRIGGER Defines a trigger for automatic TSM database backups.
QUERY STATUS Displays the settings of server parameters, such as those selected by the SET commands.
UPDATE DBBACKUPTRIGGER Changes one or more attributes of the database backup trigger.


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