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PRDB.DB0(5)		      AFS File Reference		   PRDB.DB0(5)

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

       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

       Both files are in binary	format and reside in the /var/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.

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

       IBM Corporation 2000. <> 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.

OpenAFS				  2016-12-14			   PRDB.DB0(5)


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