bpmaster¶

Name¶

bpmaster -- Daemon for cluster control and communication.

Synopsis¶

bpmaster [options] [-h ] [-V ] [-d ] [-v ] [-i ] [-c file] [-m file]

Description¶

This daemon is part of the BProc package and is installed by default. It is the controller and message/IO manager for all the compute nodes and must be running for the cluster to function.

bpmaster is started by the ClusterWare initialization script, along with other BProc daemons, and forks a copy of itself for IO forwarding. With normal cluster operation there should be 2 PIDs for bpmaster. Type ps -x |grep bpmaster to check.

The bpmaster daemon may be restarted at any time by using a ClusterWare service restart, but note that this will cause all nodes to reboot. During normal operations, use a service reload to enable /etc/beowulf/config configuration changes. The daemon reports cluster events to /var/log/messages.

Options¶

The following options are available to the bpmaster program.

`-h`	Print the command usage message and exit. If `-h` is the first option, all other options will be ignored. If `-h` is not the first option, the other options will be parsed up to the `-h` option, but no action will be taken.
`-V`	Print the command version number and exit. If `-v` is the first option, all other options will be ignored. If `-v` is not the first option, the other options will be parsed up to the `-v` option, but no action will be taken.
`-d`	Start the program in debug (verbose) mode. bpmaster will not daemonize, and all information and error messages will go to `stdout`. This information is useful when the daemon exits abnormally during operation as the information is not mixed in with the normal `/var/log/messages`.
`-v`	Increase verbosity level. This may be specified multiple times.
`-i`	Ignore interface version mismatch. This can be dangerous.
`-c file`	Specifies a different configuration file is to be used. The default is set to `/etc/beowulf/config`. This option is for debug and development. This option is not recommended for normal use.
`-m file`	Log master and node `BProc` messages to the indicated file. This information is intended for `BProc` debugging, and should not be enabled unless requested by a Scyld support engineer. This file grows in size rapidly depending of the number of nodes, approximately 2 megabytes/minute with six nodes.

Examples¶

Don't start as daemon.

[root@cluster ~] # bpmaster -d

Start the daemon using the startup script.

[root@cluster ~] # service beowulf start
 Configuring network interface (eth1):                      [  OK  ]
 Loading modules:                                           [  OK  ]
 Setting up libraries:                                      [  OK  ]
 Starting bpmaster:
 Starting beoserv:
 Starting recvstats:
 Starting sendstats: