Contents Index Protecting against total machine failure Controlling transaction log size

ASA Database Administration Guide
  Backup and Data Recovery
    Configuring your database for data protection

Differences between live backups and transaction log mirrors


Both a live backup and a transaction log mirror appear to provide a secondary copy of the transaction log. However, there are several differences between using a live backup and using a transaction log mirror:

Live backups and regular backups 

The live backup of the transaction log is always the same length or shorter than the active transaction log. When a live backup is running, and another backup restarts the transaction log (dbbackup -r or dbbackup -x), the live backup automatically truncates the live backup log and restarts the live backup at the beginning of the new transaction log.

For more information about how to make a live backup, see Making a live backup.


Contents Index Protecting against total machine failure Controlling transaction log size