The database system issues a backup ID for each backup. This makes it possible to identify the backup after it has been generated or after the last initialization of the database instance. If you are using external backup tools, the backup is also given an external backup ID.
The backup ID contains the backup type <save_type> (complete or incremental data backup or log backup) and a sequence number <sequence_no>. Data backups are numbered in sequence, regardless of whether they are complete or incremental. Log backups are numbered separately.
After a backup, the backup ID is written to the Database Manager log file dbm.knl. The content of this file is shown in full in the backup history.When you restore a database, you can view the backup history using the Database Manager and select the required backup using its backup ID.
If the backup medium used is a tape, we recommend that you write the backup ID on the label of the tape after completing the backup.
<backup_id> ::= <save_type>_<sequence_no>
<save_type> ::= DAT | PAG | LOG
<sequence_no> ::= <number>
See also:
Concepts of the Database System