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44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
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=head1 NAME
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bdb.DB0 and bdb.DBSYS1 - Contain the Backup Database and associated log
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=head1 DESCRIPTION
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The bdb.DB0 file contains the Backup Database, which
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records configuration information used by the AFS Backup System along with
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cross-indexed records of the tapes created and volumes dumped using the Backup
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System commands.
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The bdb.DBSYS1 file is a log file in which the Backup
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Server (B<buserver> process) logs each database operation before
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performing it. When an operation is interrupted, the Backup Server
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replays the log to complete the operation.
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Both files are in binary format and reside in the /usr/afs/db
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directory on each database server machine that runs the Backup Server.
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When the Backup Server starts or restarts on a given machine, it establishes a
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connection with its peers and verifies that its copy of the
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B<bdb.DB0> file matches the copy on the other database server
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machines. If not, the Backup Servers use AFS's distributed
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database technology, Ubik, to distribute to all of the machines the copy of
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the database with the highest version number.
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Use the commands in the backup suite to administer the Backup
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Database. It is advisable to create a backup copy of the
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B<bdb.DB0> file on tape on a regular basis, using the UNIX
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B<tar> command or another local disk backup utility.
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=head1 SEE ALSO
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L<backup(1)>,
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L<backup_savedb(1)>,
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L<buserver(1)>
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=head1 COPYRIGHT
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IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
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This documentation is covered by the IBM Public License Version 1.0. It was
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converted from HTML to POD by software written by Chas Williams and Russ
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Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
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