Starting a Continuous Logical-Log File Backup

When you do not want to monitor the logical-log files and start backups when the logical-log files become full, you can start a continuous backup.

When you start a continuous backup, the database server automatically backs up each logical-log file as it becomes full. When you perform continuous logical-log file backups, the database server protects you against ever losing more than a partial logical-log file, even in the worst case media failure when a chunk that contains logical-log files fails.

With continuous backups you also do not need to remember to back up the logical-log files, but someone must always make media available for the backup process. Also, you must dedicate the backup device and a terminal to the backup process.

To start a continuous backup of the logical-log files, use the -c option of the ontape command.

Starting Continuous Backups:
 
|-- -c----------------------------------------------------------|
 

The -c option initiates continuous backup of logical-log files. The database server backs up each logical-log file as it becomes full. Continuous backup does not back up the current logical-log file.

The database server can operate in online mode when you start continuous backups. To start continuous logging, execute the following command:

ontape -c

When the tape mounted on LTAPEDEV becomes full before the end of the logical-log file, the database server prompts the operator for a new tape.