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45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
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=head1 NAME
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prdb.DB0 and prdb.DBSYS1 - Contain the Protection Database and associated log
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=head1 DESCRIPTION
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The prdb.DB0 file contains the Protection Database, which
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maps AFS user, machine, and group names to their respective IDs (AFS UIDs and
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GIDs) and tracks group memberships. The Protection Server
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(B<ptserver> process) uses the information in the database to help the
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File Server grant data access to authorized users.
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The prdb.DBSYS1 file is a log file in which the
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Protection Server logs each database operation before performing it.
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When an operation is interrupted, the Protection Server replays the log to
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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 of the cell's database server machines. When the
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Protection 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 database matches
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the copy on the other database server machines. If not, the Protection
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Servers call on AFS's distributed database technology, Ubik, to
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distribute to all of the machines the copy of the database with the highest
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version number.
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Always use the commands in the pts suite to administer the
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Protection Database. It is advisable to create an archive copy of the
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database on a regular basis, using a tool such as the UNIX B<tar>
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command.
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=head1 SEE ALSO
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L<prdb_check(1)>,
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L<pts(1)>,
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L<ptserver(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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