backup_savedb - Creates a saved copy of the Backup Database


backup savedb [-portoffset <TC port offset>] [-archive <date time>+] [-localauth] [-cell <cell name>] [-help]

backup sa [-p <TC port offset>] [-a <date time>+] [-l] [-c <cell name>] [-h]


The backup savedb command creates a backup copy of the entire Backup Database and writes it to the tape in the device controlled by the Tape Coordinator indicated with the -portoffset argument. If the database is damaged (as reported by the backup dbverify command), this command repairs as much of the corruption as possible as it creates the saved copy. The Backup Server creates a dump record for the saved database in the Backup Database (but in the disk version of the database only, not in the version written to tape).

If the FILE YES instruction appears in the /usr/afs/backup/CFG_device_name file associated with the specified port offset, then the backup savedb command dumps the database copy to the backup data file listed for that port offset in the Tape Coordinator's /usr/afs/backup/tapeconfig file, instead of to tape. For the sake of clarity, the following text refers to tapes only, but the Backup System handles backup data files in much the same way.

If the -archive flag is provided, after writing the saved copy of the database the Backup System truncates the copy of the database on disk by deleting volume dump records with timestamps prior to the specified date and time (it does not delete the dump records created by previous backup savedb commands, however).

If the tape to which the database copy is written has an AFS tape name, it must be Ubik_db_dump.1 or <NULL>. Any permanent name is acceptable.

The Tape Coordinator's default response to this command is to access the first tape by invoking the MOUNT instruction in the local /usr/afs/backup/CFG_device_name file, or by prompting the backup operator to insert the tape if there is no MOUNT instruction. However, if the AUTOQUERY NO instruction appears in the CFG_device_name file, or if the issuer of the butc command included the -noautoquery flag, the Tape Coordinator instead expects the tape to be in the device already. If it is not, the Tape Coordinator invokes the MOUNT instruction or prompts the operator. It also invokes the MOUNT instruction or prompts for any additional tapes needed to complete the operation; the backup operator must arrange to provide them.


-portoffset <TC port offset>

Specifies the port offset number of the Tape Coordinator handling the tapes for this operation.

-archive <date time>+

Specifies a date and time; volume dump records with earlier timestamps are deleted from the disk copy of the Backup Database after the Backup System dumps the database (a dump's timestamp appears in the created field of the output from the backup dumpinfo command). However, if a dump set contains any dump created after the specified date, none of the dump records associated with the dump set are deleted. Dump records for previous dumps of the database (created with the backup savedb command) are never deleted; use the backup deletedump command to remove them.

Provide one of two values:


Constructs a server ticket using a key from the local /usr/afs/etc/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8).

-cell <cell name>

Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8).


Prints the online help for this command. All other valid options are ignored.


The following example writes a copy of the Backup Database to the tape device controlled by the Tape Coordinator with port offset 1:

   % backup savedb -portoffset 1


The issuer must be listed in the /usr/afs/etc/UserList file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser root if the -localauth flag is included.


butc(5), backup(8), backup_dbverify(8), backup_restoredb(8), butc(8)


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This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.