BUSERVER(8) AFS Command Reference BUSERVER(8)NAMEbuserver - Initializes the Backup Server
SYNOPSISbuserver [-database <database directory>]
[-auditlog <log path>] [-audit-interface (file | sysvmq)]
[-cellservdb <cell configuration directory>] [-resetdb]
[-noauth] [-smallht] [-servers <list of ubik database servers>+]
[-enable_peer_stats] [-enable_process_stats] [-rxbind]
[-p <number of threads>] [-help]
DESCRIPTION
The buserver command initializes the Backup Server, which runs on
database server machines and maintains the Backup Database. In the
conventional configuration, the binary file is located in the
/usr/afs/bin directory on a file server machine.
The buserver command is not normally issued at the command shell
prompt, but rather placed into a database server machine's
/usr/afs/local/BosConfig file with the bos create command. If it is
ever issued at the command shell prompt, the issuer must be logged onto
a file server machine as the local superuser "root".
As it initializes, the Backup Server process creates the two files that
constitute the Backup Database, bdb.DB0 and bdb.DBSYS1, in the
/usr/afs/db directory if they do not already exist. The Backup Database
houses information about volume sets and entries, the dump hierarchy,
Tape Coordinators, and previously performed dump sets. Use the commands
in the backup suite to administer the database.
The Backup Server records a trace of its activity in the
/usr/afs/logs/BackupLog file. Use the bos getlog command to display the
contents of the file.
This command does not use the syntax conventions of the AFS command
suites. Provide the command name and all option names in full.
CAUTIONS
The buserver process reserves port 7021 for its use. Unexpected
behavior can occur if another process tries to reserve this port while
the buserver process is running.
OPTIONS-database <database directory>
Specifies the pathname of an alternate directory for the Backup
Database files, ending in a final slash ("/"). If this argument is
not provided, the default is the /usr/afs/db directory.
-auditlog <log path>
Turns on audit logging, and sets the path for the audit log. The
audit log records information about RPC calls, including the name
of the RPC call, the host that submitted the call, the
authenticated entity (user) that issued the call, the parameters
for the call, and if the call succeeded or failed.
-audit-interface (file | sysvmq)
Specifies what audit interface to use. Defaults to "file". See
fileserver(8) for an explanation of each interface.
-cellservdb <cell configuration directory>
Specifies the pathname of the directory from which the Backup
Server reads in an alternate version of the CellServDB file. This
argument is mandatory for correct functioning when the Backup
Server is running on a subset of the cell's database server
machines that is not a majority of the machines listed in the
standard /usr/afs/etc/CellServDB file (which the Backup Server
consults if this argument is not provided). It is not appropriate
in any other circumstances.
-resetdb
Removes all of the information in the Backup Database files in the
/usr/afs/db directory, leaving zero-length versions of them. The
backup operator must recreate the configuration entries in the
database (for volume sets, the dump hierarchy and so on) before
performing backup operations.
-noauth
Establishes an unauthenticated connection between the issuer and
the Backup Server, in which the Backup Server treats the issuer as
the unprivileged user "anonymous". It is useful only when
authorization checking is disabled on the database server machine.
In normal circumstances, the Backup Server allows only authorized
(privileged) users to issue commands that affect or contact the
Backup Database, and refuses to perform such an action even if the
-noauth flag is used.
-smallht
Directs the Backup Server to use smaller internal hash tables for
the Backup Database, which reduces memory requirements but can make
data access take longer.
-servers <list of ubik database servers>+
Specifies the database server machines on which to start the Backup
Server. Use this argument if running the Backup Server on a subset
of the database server machines that is not a majority of the
machines listed in the /usr/afs/etc/CellServDB file.
-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.
-rxbind
Bind the Rx socket to the primary interface only. (If not
specified, the Rx socket will listen on all interfaces.)
-p <number of threads>
Sets the number of server lightweight processes (LWPs or pthreads)
to run. Provide a positive integer from the range 3 to 16. The
default value is 3.
-help
Prints the online help for this command. All other valid options
are ignored.
EXAMPLES
The following example bos create command creates a "buserver" process
on the file server machine "fs3.abc.com". It appears here on two lines
only for legibility.
% bos create -server fs3.abc.com -instancebuserver \
-type simple -cmd /usr/afs/bin/buserver
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 ALSOBackupLog(5), BosConfig(5), CellServDB(5), bdb.DB0(5), backup(8),
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.
OpenAFS 2013-10-09 BUSERVER(8)
