backup_dbverify - Checks the integrity of the Backup Database
>] [ -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
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
command repairs some types of corruption.
- 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
- Prints the online help for this command. All other valid
options are ignored.
The command displays one of the following two messages:
- Database OK
- 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.
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
% backup dbverify -detail
Orphan blocks 0
Database checker was db1.abc.com
The issuer must be listed in the /etc/openafs/server/UserList
every machine where the Backup Server is running, or must be logged onto a
server machine as the local superuser "root" if the
flag is included.
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