volserver - Initializes the Volume Server component of the dafs process
volserver [-log] [-p <number of processes>] [-auditlog [<log path>] | yes | on] [-audit-interface (file | syslog | sysvmq)] [-restricted_query (anyuser | admin)] [-maxthreads <maximum number of worker threads>] [-threadidle <maximum idle lifetime for a worker thread in seconds>] [-udpsize <size of socket buffer in bytes>] [-debug <debug level>] [-enable_peer_stats] [-enable_process_stats] [-allow-dotted-principals] [-help]
The volserver command initializes the Volume Server component of the
In the conventional configuration,
its binary file is located in the /usr/libexec/yfs directory on a file server machine.
The volserver command is not normally issued at the command shell prompt but rather placed into a file server machine's /etc/yfs/server/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
The Volume Server records a trace of its activity in the /var/log/yfs/VolserLog file. Use the bos getlog command to display the contents of the file.
The Volume Server processes the vos commands that administrators use to create, delete, move, and replicate volumes, as well as prepare them for archiving to tape or other media.
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.
Sets the detail level for the debugging trace written to the /var/log/yfs/VolserLog file.
Provide one of the following values,
each of which produces an increasingly detailed trace:
Records in the /var/log/yfs/VolserLog file the names of all users who successfully initiate a vos command. The Volume Server also records any file removals that result from issuing the vos release command with the -f flag.
Turns on audit logging, and optionally 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. If no path is specified, /var/log/yfs/VolserAuditLog is used.
Specifies what audit interface to use.
See fileserver(8) for an explanation of each interface.
Sets the size of the UDP buffer in bytes, which is 64 KB by default. Provide a positive integer, preferably larger than the default.
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.
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.
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 disable this check by starting the server with this option.
Preserve volume access statistics over volume restore and reclone operations. By default, volume access statistics are reset during volume restore and reclone operations.
This is the same as the -sync option in fileserver(8). See fileserver(8).
Sets the file to use for server logging. If logfile is not specified and no other logging options are supplied, this will be /var/log/yfs/VolserLog. Note that this option is intended for debugging and testing purposes. Changing the location of the log file from the command line may result in undesirable interactions with tools such as bos.
Sets an alternate location for the configuration file that will be parsed for configuration options for this service. If this option is not specified, /etc/yfs/server/yfs-server.conf will be used.
Specify the maximum transmission unit (MTU) value. The value must be between the minimum (520) and maximum (16384) Rx packet sizes.
It artificially limits the maximum Rx data packet size that will be transmitted. It can be used when the maximum size that can be successfully transmitted is smaller than the reported network interface MTU.
Specify the maximum sliding window size that RX may use on the wire. Larger windows improve performance on networks with a high latency, at the expense of higher memory usage. The value specified must be less than the maximum RX window size of 255.
Bind the Rx socket to the primary interface only. (If not specified, the Rx socket will listen on all interfaces.)
Specifies that logging output should go to syslog instead of the normal log file. -syslog=FACILITY can be used to specify to which facility the log message should be sent.
This option is obsolete, and is now only accepted for compatibility with older releases. All it does now is log a warning message about how the option is obsolete.
Restrict RPCs that query information about volumes to a specific group of users.
You can use
admin to restrict to AFS administrators and members of the ReaderList(5).
anyuser option doesn't restrict the RPCs and leaves it open for all users including unauthenticated users.
The default is
Specifies the maximum number of worker threads that can be started to service incoming remote procedure calls. The default is either 1024 or 32 less than the maximum number of file descriptors the volserver process is permitted to open, if that is smaller.
Specifies the maximum number of seconds that a worker thread can remain idle before it will be terminated. The default is 20 minutes (1200 seconds). This value should be increased if the volserver workload is known to experience a spike in the number of serviced remote procedure calls on a periodic cycle longer than the default.
Prints the online help for this command. All other valid options are ignored.
The following bos create command creates a
volserver process on the machine
fs2.example.com as part of the dafs process:
% bos create -server fs2.example.com -instance dafs -type dafs \ -cmd "/usr/libexec/yfs/fileserver" \ /usr/libexec/yfs/volserver \ /usr/libexec/yfs/salvageserver \ /usr/libexec/yfs/salvager
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.
BosConfig(5), VolserLog(5), bos_create(8), bos_getlog(8), vos(1)
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