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NAME

       vlserver - Initializes the Volume Location Server

SYNOPSIS

       vlserver [-p <lwp processes>] [-nojumbo]
           [-allow-dotted-principal] [-enable_peer_stats]
       [-enable_process_stats]
           [-help]

DESCRIPTION

       The vlserver command initializes the Volume Location (VL) Server, which
       runs on every database server machine. In the conventional
       configuration, its binary file is located in the /usr/lib/openafs
       directory on a file server machine.

       The vlserver command is not normally issued at the command shell prompt
       but rather placed into a file server machine’s /etc/openafs/BosConfig
       file with the bos create command. If it is ever issued at the command
       shell prompt, the issuer must be logged onto a database server machine
       as the local superuser "root".

       As it initializes, the VL Server process creates the two files that
       constitute the Volume Location Database (VLDB), vldb.DB0 and
       vldb.DBSYS1, in the /var/lib/openafs/db directory if they do not
       already exist. Use the commands in the vos suite to administer the
       database.

       The VL Server maintains the record of volume locations in the Volume
       Location Database (VLDB). When the Cache Manager fills a file request
       from an application program, it first contacts the VL Server to learn
       which file server machine currently houses the volume that contains the
       file.  The Cache Manager then requests the file from the File Server
       process running on that file server machine.

       The VL Server records a trace of its activity in the
       /var/log/openafs/VLLog file. Use the bos getlog command to display the
       contents of the file. By default, it records on a minimal number of
       messages. For instructions on increasing the amount of logging, see
       VLLog(5).

       By default, the VL Server runs nine lightweight processes (LWPs). To
       change the number, use the -p argument.

       This command does not use the syntax conventions of the AFS command
       suites. Provide the command name and all option names in full.

OPTIONS

       -p <lwp processes>
           Sets the number of server lightweight processes (LWPs) to run.
           Provide an integer between 4 and 16. The default is 9.

       -nojumbo
           Prohibits the server from sending or receiving jumbograms. A
           jumbogram is a large-size packet composed of 2 to 4 normal Rx data
           packets that share the same header. The VL Server uses jumbograms
           by default, but some routers are not capable of properly breaking
           the jumbogram into smaller packets and reassembling them.

       -enable_peer_stats
           Activates the collection of Rx statistics and allocates memory for
           their storage. For each connection with a specific UDP port on
           another machine, a separate record is kept for each type of RPC
           (FetchFile, GetStatus, and so on) sent or received. To display or
           otherwise access the records, use the Rx Monitoring API.

       -enable_process_stats
           Activates the collection of Rx statistics and allocates memory for
           their storage. A separate record is kept for each type of RPC
           (FetchFile, GetStatus, and so on) sent or received, aggregated over
           all connections to other machines. To display or otherwise access
           the records, use the Rx Monitoring API.

       -allow-dotted-principal
           By default, the RXKAD security layer will disallow access by
           Kerberos principals with a dot in the first component of their
           name. This is to avoid the confusion where principals user/admin
           and user.admin are both mapped to the user.admin PTS entry. Sites
           whose Kerberos realms don’t have these collisions between principal
           names may disabled this check by starting the server with this
           option.

       -help
           Prints the online help for this command. All other valid options
           are ignored.

EXAMPLES

       The following bos create command creates a vlserver process on the
       machine "fs2.abc.com" that uses six lightweight processes. Type the
       command on a single line:

          % bos create -server fs2.abc.com -instance vlserver -type simple \
                       -cmd "/usr/lib/openafs/vlserver -p 6"

PRIVILEGE REQUIRED

       The issuer must be logged in as the superuser "root" on a file server
       machine to issue the command at a command shell prompt. It is
       conventional instead to create and start the process by issuing the bos
       create command.

SEE ALSO

       BosConfig(5), VLLog(5), vldb.DB0(5), bos_create(8), bos_getlog(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.