HCoop / hcoop / debian / openafs.git / blame
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1 | =head1 NAME |
| 2 | ||
| 3 | prdb.DB0, prdb.DBSYS1 - Contain the Protection Database and associated log | |
| 4 | ||
| 5 | =head1 DESCRIPTION | |
| 6 | ||
| 7 | The F<prdb.DB0> file contains the Protection Database, which maps AFS | |
| 8 | user, machine, and group names to their respective IDs (AFS UIDs and GIDs) | |
| 9 | and tracks group memberships. The Protection Server (B<ptserver> process) | |
| 10 | uses the information in the database to help the File Server grant data | |
| 11 | access to authorized users. | |
| 12 | ||
| 13 | The F<prdb.DBSYS1> file is a log file in which the Protection Server logs | |
| 14 | each database operation before performing it. When an operation is | |
| 15 | interrupted, the Protection Server replays the log to complete the | |
| 16 | operation. | |
| 17 | ||
| 18 | Both files are in binary format and reside in the F</usr/afs/db> directory | |
| 19 | on each of the cell's database server machines. When the Protection Server | |
| 20 | starts or restarts on a given machine, it establishes a connection with | |
| 21 | its peers and verifies that its copy of the database matches the copy on | |
| 22 | the other database server machines. If not, the Protection Servers call on | |
| 23 | AFS's distributed database technology, Ubik, to distribute to all of the | |
| 24 | machines the copy of the database with the highest version number. | |
| 25 | ||
| 26 | Always use the commands in the B<pts> suite to administer the Protection | |
| 27 | Database. It is advisable to create an archive copy of the database on a | |
| 28 | regular basis, using a tool such as the UNIX B<tar> command. | |
| 29 | ||
| 30 | =head1 SEE ALSO | |
| 31 | ||
| 32 | L<prdb_check(8)>, | |
| 33 | L<pts(1)>, | |
| 34 | L<ptserver(8)> | |
| 35 | ||
| 36 | =head1 COPYRIGHT | |
| 37 | ||
| 38 | IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. | |
| 39 | ||
| 40 | This documentation is covered by the IBM Public License Version 1.0. It was | |
| 41 | converted from HTML to POD by software written by Chas Williams and Russ | |
| 42 | Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. |