backup_dbverify - Checks the integrity of the Backup Database
backup dbverify [-detail] [-localauth]
[-cell <cell name>]
backup db [-d] [-l] [-c <cell name>] [-h]
The backup dbverify command checks the integrity of the Backup
Database. The command's output indicates whether the Backup Database is
damaged (data is corrupted) or not. If the Backup Database is
undamaged, it is safe to continue using it. If it is corrupted,
discontinue any backup operations until it is repaired.
While this command runs, no other backup operation can access the
Backup Database; the other commands do not run until this command
completes. Avoid issuing this command when other backup operations are
likely to run. The backup savedb command repairs some types of
Reports the number of orphaned blocks found, any inconsistencies,
and the name of the server machine running the Backup Server that
is checking its copy of the database.
Constructs a server ticket using a key from the local
/etc/openafs/server/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
The command displays one of the following two messages:
The database is undamaged and can be used.
Database not OK
The database is damaged. You can use the backup savedb command to
repair many kinds of corruption as it creates a backup copy. For
more detailed instructions, see the OpenAFS Administration Guide
chapter about performing backup operations.
The -detail flag provides additional information:
· The number of orphan blocks found. These are ranges of memory that
the Backup Server preallocated in the database but cannot use.
Orphan blocks do not interfere with database access, but do waste
disk space. To free the unusable space, dump the database to tape
by using the backup savedb command, and then restore it by using
the backup restoredb command.
· Any inconsistencies in the database, such as invalid hostnames for
Tape Coordinator machines.
· The name of the database server machine on which the Backup
Database was checked, designated as the "Database checker". For a
detailed trace of the verification operation, see the
/var/log/openafs/BackupLog file on the indicated machine. You can
use the bos getlog command to display it.
The following command confirms that the Backup Database is undamaged:
% backup dbverify
The following command confirms that the Backup Database is undamaged
and that it has no orphan blocks or invalid Tape Coordinator entries.
The Backup Server running on the machine "db1.abc.com" checked its copy
of the Database.
% backup dbverify -detail
Orphan blocks 0
Database checker was db1.abc.com
The issuer must be listed in the /etc/openafs/server/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.
BackupLog(5), backup(8), backup_restoredb(8), backup_savedb(8),
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
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