3 buserver - Initializes the Backup Server
10 B<buserver> S<<< [B<-database> <I<database directory>>] >>>
11 S<<< [B<-cellservdb> <I<cell configuration directory>>] >>> [B<-resetdb>]
12 [B<-noauth>] [B<-smallht>] [B<-servers> <I<list of ubik database servers>>+]
13 [B<-enable_peer_stats>] [B<-enable_process_stats>] [B<-rxbind>]
14 [B<-p> <I<number of threads>>] [B<-help>]
21 The B<buserver> command initializes the Backup Server, which runs on
22 database server machines and maintains the Backup Database. In the
23 conventional configuration, the binary file is located in the
24 F</usr/afs/bin> directory on a file server machine.
26 The B<buserver> command is not normally issued at the command shell
27 prompt, but rather placed into a database server machine's
28 F</usr/afs/local/BosConfig> file with the B<bos create> command. If it is
29 ever issued at the command shell prompt, the issuer must be logged onto a
30 file server machine as the local superuser C<root>.
32 As it initializes, the Backup Server process creates the two files that
33 constitute the Backup Database, F<bdb.DB0> and F<bdb.DBSYS1>, in the
34 F</usr/afs/db> directory if they do not already exist. The Backup Database
35 houses information about volume sets and entries, the dump hierarchy, Tape
36 Coordinators, and previously performed dump sets. Use the commands in the
37 B<backup> suite to administer the database.
39 The Backup Server records a trace of its activity in the
40 F</usr/afs/logs/BackupLog> file. Use the B<bos getlog> command to display
41 the contents of the file.
43 This command does not use the syntax conventions of the AFS command
44 suites. Provide the command name and all option names in full.
48 The B<buserver> process reserves port 7021 for its use. Unexpected
49 behavior can occur if another process tries to reserve this port while the
50 B<buserver> process is running.
56 =item B<-database> <I<database directory>>
58 Specifies the pathname of an alternate directory for the Backup Database
59 files, ending in a final slash (C</>). If this argument is not provided,
60 the default is the F</usr/afs/db> directory.
62 =item B<-cellservdb> <I<cell configuration directory>>
64 Specifies the pathname of the directory from which the Backup Server reads
65 in an alternate version of the F<CellServDB> file. This argument is
66 mandatory for correct functioning when the Backup Server is running on a
67 subset of the cell's database server machines that is not a majority of
68 the machines listed in the standard F</usr/afs/etc/CellServDB> file (which
69 the Backup Server consults if this argument is not provided). It is not
70 appropriate in any other circumstances.
74 Removes all of the information in the Backup Database files in the
75 F</usr/afs/db> directory, leaving zero-length versions of them. The
76 backup operator must recreate the configuration entries in the database
77 (for volume sets, the dump hierarchy and so on) before performing backup
82 Establishes an unauthenticated connection between the issuer and the
83 Backup Server, in which the Backup Server treats the issuer as the
84 unprivileged user C<anonymous>. It is useful only when authorization
85 checking is disabled on the database server machine. In normal
86 circumstances, the Backup Server allows only authorized (privileged) users
87 to issue commands that affect or contact the Backup Database, and refuses
88 to perform such an action even if the B<-noauth> flag is used.
92 Directs the Backup Server to use smaller internal hash tables for the
93 Backup Database, which reduces memory requirements but can make data
96 =item B<-servers> <I<list of ubik database servers>>+
98 Specifies the database server machines on which to start the Backup
99 Server. Use this argument if running the Backup Server on a subset of the
100 database server machines that is not a majority of the machines listed in
101 the F</usr/afs/etc/CellServDB> file.
103 =item B<-enable_peer_stats>
105 Activates the collection of Rx statistics and allocates memory for their
106 storage. For each connection with a specific UDP port on another machine,
107 a separate record is kept for each type of RPC (FetchFile, GetStatus, and
108 so on) sent or received. To display or otherwise access the records, use
109 the Rx Monitoring API.
111 =item B<-enable_process_stats>
113 Activates the collection of Rx statistics and allocates memory for their
114 storage. A separate record is kept for each type of RPC (FetchFile,
115 GetStatus, and so on) sent or received, aggregated over all connections to
116 other machines. To display or otherwise access the records, use the Rx
121 Bind the Rx socket to the primary interface only. (If not specified, the
122 Rx socket will listen on all interfaces.)
124 =item B<-p> <I<number of threads>>
126 Sets the number of server lightweight processes (LWPs or pthreads) to run.
127 Provide a positive integer from the range 3 to 16. The default value is 3.
131 Prints the online help for this command. All other valid options are
138 The following example B<bos create> command creates a C<buserver> process
139 on the file server machine C<fs3.abc.com>. It appears here on two lines
142 % bos create -server fs3.abc.com -instance buserver \
143 -type simple -cmd /usr/afs/bin/buserver
145 =head1 PRIVILEGE REQUIRED
147 The issuer must be logged in as the superuser C<root> on a file server
148 machine to issue the command at a command shell prompt. It is conventional
149 instead to create and start the process by issuing the B<bos create>
164 IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
166 This documentation is covered by the IBM Public License Version 1.0. It was
167 converted from HTML to POD by software written by Chas Williams and Russ
168 Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.