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1 | =head1 NAME |
2 | ||
3 | bdb.DB0, bdb.DBSYS1 - Contain the Backup Database and associated log | |
4 | ||
5 | =head1 DESCRIPTION | |
6 | ||
7 | The F<bdb.DB0> file contains the Backup Database, which records | |
8 | configuration information used by the AFS Backup System along with | |
9 | cross-indexed records of the tapes created and volumes dumped using the | |
10 | Backup System commands. | |
11 | ||
12 | The F<bdb.DBSYS1> file is a log file in which the Backup Server | |
13 | (B<buserver> process) logs each database operation before performing | |
14 | it. When an operation is interrupted, the Backup Server replays the log to | |
15 | complete the operation. | |
16 | ||
17 | Both files are in binary format and reside in the F</usr/afs/db> directory | |
18 | on each database server machine that runs the Backup Server. When the | |
19 | Backup Server starts or restarts on a given machine, it establishes a | |
20 | connection with its peers and verifies that its copy of the F<bdb.DB0> | |
21 | file matches the copy on the other database server machines. If not, the | |
22 | Backup Servers use AFS's distributed database technology, Ubik, to | |
23 | distribute to all of the machines the copy of the database with the | |
24 | highest version number. | |
25 | ||
26 | Use the commands in the backup suite to administer the Backup Database. It | |
27 | is advisable to create a backup copy of the F<bdb.DB0> file on tape on a | |
28 | regular basis, using the UNIX B<tar> command or another local disk backup | |
29 | utility. | |
30 | ||
31 | =head1 SEE ALSO | |
32 | ||
33 | L<backup(8)>, | |
34 | L<backup_savedb(8)>, | |
35 | L<buserver(8)> | |
36 | ||
37 | =head1 COPYRIGHT | |
38 | ||
39 | IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. | |
40 | ||
41 | This documentation is covered by the IBM Public License Version 1.0. It was | |
42 | converted from HTML to POD by software written by Chas Williams and Russ | |
43 | Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. |