NAME

       vldb.DB0, vldb.DBSYS1 - Contain the Volume Location Database and associated log

DESCRIPTION

       The file vldb.DB0 contains the Volume Location Database (VLDB), which tracks the location
       of all AFS volumes stored on file server machines in the cell. The Volume Location (VL)
       Server (vlserver process) provides information from the database to Cache Managers when
       they need to access AFS data.

       The file vldb.DBSYS1 is a log file in which the VL Server logs each database operation
       before performing it. When an operation is interrupted, the VL 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 VL 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 VL 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 vos suite to administer the VLDB. 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

       vldb_check(8), vlserver(8), vos(1)

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.