backup_start

You start backing up the data area or the log area of the database.

After the system has executed this DBM command, information about the backup is output. The information is only given when the backup operation is completed or interrupted. For this reason, the response to this DBM command can take a long time.

You can display the status of the backup operation with the DBM command backup_state.

Note Note

Pay special attention to the Returncode reply field, which contains a numeric value for a message.

End of the note.

If it is clear from the message number that the backup operation was interrupted and not completed, you must continue the session with a continuation command (backup_replace, backup_ignore), or terminate it (backup_cancel).

Prerequisites

You have the server authorization Backup.
You have opened a database session (see: db_create).
If you want to perform an interactive log backup, you must have performed a data backup for the relevant database at least once.

Structure

backup_start <medium_name> [<backup_type>] [AUTOIGNORE]

Options
Option	Description
`<medium_name>`	Name of the backup template When backing up on a group of parallel data carriers, you need to specify the name of the group here. (See medium_put, Database Administration, Backup Templates and Data Carriers)
`<backup_type>`	Type of backup You only need to specify an entry here if you did not specify the backup type when you defined the backup template to be used (template definitions in earlier versions). Possible values are: `DATA \| PAGES \| LOG` `DATA`: complete data backup `PAGES`: incremental data backup`LOG`: Interactive log backup Otherwise the system uses the value which you specified during the definition of the backup template.
`AUTOIGNORE`	This option is only relevant when backing up to a group of parallel data carriers in the background. You use it to define that the system continues backing up to the remaining data carriers when one of the data carriers is full. This prevents you having to react interactively (see: backup_ignore, Database Administration: Backing Up to a Group of Parallel Data Carriers). Note Only use this option when you are sure that the complete amount of backup data will fit on the first set of data carriers in the group (i.e. no succeeding data carriers are required). End of the note.

Result

OK

...

Values for the Reply Fields
Value	Description
`Date`	Date
`Time`	Start time for backup
`Server`	Name of the database computer
`Database`	Name of the database
`Kernel Version`	Version of the database kernel
`Pages Transferred`	Number of pages transferred
`Pages Left`	Number of pages still to be transferred
`Volumes`	Number of data carriers used
`Medianame`	Name of the backup template
`Location`	File or device name
`Errortext`	Error message text See also: Messages documentation
`Label`	Backup ID
`Is Consistent`	Only for data backup: Backup is internally consistent
`First LOG Page`	For data backup: first page of log backup to be read For log backup: first page saved in log
`Last LOG Page`	For log backup only: last page saved in log
`DB Stamp 1 Date DB Stamp 1 Time`	Time stamp for first page of log backup
`DB Stamp 2 Date DB Stamp 2 Time`	Time stamp for last page of log backup
`Page Count`	Total number of pages backed up
`Devices Used`	Number of backup devices used
`Database ID`	Database ID used to identify data and log backups which belong together

If an error occurs while you are using a backup tool, you will receive a reply with the following information:

Reply in the Event of an Error
Value	Description
`<errcode>`	Error Message Number See: Messages documentation
`<err_description>`	Description of the error
`<extended_description>`	Cause of error

The following errors may occur:

Messages
Error Message Number	Error message text	Explanation
`-24927`	`ERR_TOOLCHK: the external backup tool was not found`	The backup tool could not be found or has been installed incorrectly.
`-24926`	`ERR_MEDIUMCHK: the medium cannot be used with this external backup tool`	The backup template specified cannot be used with this backup tool.
`-24925`	`ERR_PREPARE: prepare of the backup operation failed`	The preparations required to use the backup tool could not be completed correctly.
`-24924`	`ERR_DBREQ: cannot start database kernel request`	The database was unable to start the backup.
`-24923`	`ERR_TOOLREQ: cannot start external backup tool correctly`	The backup tool could not be started correctly.
`-24922`	`ERR_OPCHK: cannot check state of backup operation`	Unable to check the status of the database or the backup tool.
`-24921`	`ERR_POSTOP: cannot finish backup operation correctly`	Although the backup was successful, the required post-processing steps could not be performed.
`-24920`	`ERR_BACKUPOP: backup operation was unsuccessful`	The backup failed due to a problem with the database or with the backup tool.
`-24919`	`ERR_CLEANUP: cannot clean up correctly after backup operation`	Although the backup was successful, the system resources used during the check could not be released again.

More Information

Messages documentation

Database Administration, Backing Up Databases