Provided by: openafs-dbserver_1.4.9.dfsg1-0+ubuntu3_i386 bug

NAME

       prdb.DB0, prdb.DBSYS1 - Contain the Protection Database and associated
       log

DESCRIPTION

       The prdb.DB0 file contains the Protection Database, which maps AFS
       user, machine, and group names to their respective IDs (AFS UIDs and
       GIDs) and tracks group memberships. The Protection Server (ptserver
       process) uses the information in the database to help the File Server
       grant data access to authorized users.

       The prdb.DBSYS1 file is a log file in which the Protection Server logs
       each database operation before performing it.  When an operation is
       interrupted, the Protection Server replays the log to complete the
       operation.

       Both files are in binary format and reside in the /var/lib/openafs/db
       directory on each of the cell’s database server machines. When the
       Protection Server starts or restarts on a given machine, it establishes
       a connection with its peers and verifies that its copy of the database
       matches the copy on the other database server machines. If not, the
       Protection Servers call on AFS’s distributed database technology, Ubik,
       to distribute to all of the machines the copy of the database with the
       highest version number.

       Always use the commands in the pts suite to administer the Protection
       Database. It is advisable to create an archive copy of the database on
       a regular basis, using a tool such as the UNIX tar command.

SEE ALSO

       prdb_check(8), pts(1), ptserver(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.
       It was converted from HTML to POD by software written by Chas Williams
       and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.