prdb.DB0, prdb.DBSYS1 - Contain the Protection Database and associated log
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
uses the information in the database to help the File Server grant data access
to authorized users.
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
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