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Background documentation Backup ID Locate the document in the library structure

The database system issues a backup ID (IBID) for each backup, consisting of a <key> issued by the system and the <label>. The combination of key and label clearly identifies the backup since it was generated or since the last time the database instance was initialized.

If you are using external backup tools, the system also issues the backup with an External Backup ID (EBID ).

The label consists of a character string for the <backup_type> (complete or incremental data backup or log backup) and a <sequence_no>. Data backups are numbered sequentially, regardless of whether they are complete or incremental. The database system counts log backups separately.

After the backup is completed, the Database Manager writes the backup ID in the dbm.knl log file of the Database Manager. You can display all the contents of this file in the backup history. When you restore a database, you can display the backup history using the Database Manager and select the required backup using its backup ID.

Recommendation

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.

Formal Description of the Backup IDs

<IBID> ::= <key><label>

<label> ::= <backup_type>_<sequence_no>

<backup_type> ::= DAT | PAG | LOG

See also:

Concepts of the Database System

·        Log Files

·        Backing Up and Restoring

 

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