If automatic log backup is activated, the database system automatically backs up redo log entries from a log segment of the log area to a version file, as soon as the log segment is full. The database system can then overwrite old redo log entries in a log segment with new redo log entries.
If automatic log backup is activated, you have to archive the version files regularly.
See also:
Concepts of the Database System, Backing Up Log Entries
Database Manager GUI, Activating and Deactivating Automatic Log Backup
Database Manager CLI, Activating Automatic Log Backup
Database
Administration in CCMS, Activating
Interactive Log Backup