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           The BosConfig file lists the processes that the Basic OverSeer (BOS)
           Server monitors on its server machine, and thus defines which AFS
           server processes run on the machine. It specifies how the BOS Server
           reacts when a process fails, and also defines the times at which the
           BOS Server automatically restarts processes as part of performance
           maintenance.  The file must reside in the /var/lib/openafs/local
           directory on each AFS server machine.
           A server process entry in the BosConfig file records the following
           ?   The entry type, which is one of the following:
                   Designates a server process that runs periodically instead of
                   continuously. The BOS Server starts a cron process only at
                   specified times, not whenever it fails. All standard AFS
                   process entries except "fs" are simple (there are no standard
                   cron processes).
               fs  Designates a group of interdependent server processes. If one
                   of the processes fails, the BOS Server must coordinate its
                   restart with the restart of the other processes in the group,
                   possibly by stopping them first.
                   There is only one standard entry of this type, for which the
                   conventional name is "fs". It combines three server processes:
                   the File Server (fileserver process), the Volume Server
                   (volserver process), and the Salvager (salvager process). These
                   processes all operate on the same data--the AFS data stored on
                   an AFS server machine's /vicep partitions and mounted in the
                   AFS filespace--but in different ways. Grouping the processes
                   prevents them from attempting to access the same data
                   simultaneously, which can cause corruption.
                   During normal operation, the Salvager process is not active. If
                   the File Server process fails, however, the BOS Server stops
                   the Volume Server process and runs the Salvager process to
                   correct any corruption that resulted from the failure. (The
                   administrator can also issue the bos salvage command to invoke
                   the Salvager process.) If the Volume Server fails, the BOS
                   Server can restart it without stopping the File Server or
                   running the Salvager.
                   Designates a server process that runs independently of any
                   other on the server machine. If a simple process fails, the BOS
                   Server does not have to coordinate its restart with any other
           ?   The entry name. The conventional name for an entry in the BosConfig
           ?   One or more command parameters which the BOS Server invokes to
               start the process or processes associated with the entry:
               ?   A "cron" entry has two command parameters, the first the
                   complete pathname to the program, and the second the time at
                   which the BOS Server invokes the program.
               ?   The "fs" entry has three command parameters, each the complete
                   pathname to the fileserver, volserver, and salvager programs,
                   in that order.
               ?   A "simple" entry has only one command parameter, the complete
                   pathname to the program.
           In addition to server process entries, the BosConfig file specifies the
           times at which the BOS Server performs two types of automatic process
           ?   The general restart time at which the BOS Server restarts itself
               and then each process for which the entry in the BosConfig file has
               status flag "Run". The default setting is Sunday at 4:00 a.m.
           ?   The binary restart time at which the BOS Server restarts any server
               process for which the time stamp on the binary file in the
               /usr/lib/openafs directory is later than the last restart time for
               the process. The default is 5:00 a.m.
           Although the BosConfig file is in ASCII format, it is normally best not
           to use a text editor to alter it.  The parser is very picky, and
           incorrectly formatted entries can prevent server startup in ways that
           are difficult to diagnose. Instead, use the appropriate commands from
           the bos command suite:
           ?   The bos create command to create an entry in the file and start the
               associated process.
           ?   The bos delete command to remove an entry from the file after the
               bos stop command is used to stop the associated process.
           ?   The bos getrestart command to display the times at which the BOS
               Server performs automatic restarts.
           ?   The bos setrestart command to set the times at which the BOS Server
               performs automatic process restarts.
           ?   The bos start command to change an entry's status flag to "Run" and
               start the associated process.
           ?   The bos status command to display all processes listed in the file.
           ?   The bos stop command to change an entry's status flag to "NotRun"
               and stop the associated process.
           When the BOS Server shuts down, it rewrites BosConfig, discarding any
           changes made manually to that file.  To change the configuration for
           the next BOS Server restart, instead write a new file to
           If exists when the BOS Server starts, it will rename that
           file to BosConfig before reading its configuration.


           bos_create(8), bos_delete(8), bos_getrestart(8), bos_restart(8),
           bos_setrestart(8), bos_shutdown(8), bos_start(8), bos_startup(8),
           bos_status(8), bos_stop(8), bos_salvage(8), fileserver(8), salvager(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 2012-03-26 BOSCONFIG(5)


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