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We recommend starting MoMs before starting the server. This way, MoM will be ready to respond to the Server’s "are you there?" ping, preventing the server from attempting to contact a MoM that is still down. This will cut down on inter-daemon traffic, especially in larger complexes.
The PBS start/stop script is named pbs. To run it, you type the following:
<path to script>/pbs [start|stop|restart|status]
The script starts, stops, or restarts PBS daemons on the local machine. It can also be used to report the PID of any PBS daemon on the local machine. The PBS start/stop script reads the pbs.conf file to determine which components should be started.
The start/stop script runs at boot time, starting PBS upon bootup. You can run the script manually. The start/stop script runs on and affects only the local host.
When you run the PBS start/stop script, PBS will create any vnode definition files. These are not created through the method of running the command that starts a daemon.
The location of the PBS start/stop script depends on the OS, as shown in the following table:
If /etc/init.d exists: /etc/init.d/pbs
Else /etc/rc.d/init.d/pbs
The server, scheduler, and MoM processes must run with the real and effective UID of root.
You must run three daemons on the host that has both server and MOM:
all should be trun as root.
The PBS MoM is started manually using the pbs_mom command. See “pbs_mom” on page 58 of the PBS Professional Reference Guide.
You can restart MoM with the following options:
Table 7-2: MoM Restart Options
Option
Effect on Jobs
pbs_mom
Job processes
To start the server manually, do the following:
PBS_EXEC/sbin/pbs_server [options]
If, when the server was shut down, running jobs were killed and requeued, then starting the server
with the -t hot option puts those jobs back in the Running state first.
See “pbs_server” on page 90 of the PBS Professional Reference Guide for details and the options to the
pbs_server command.
To start the scheduler manually, do the following:
PBS_EXEC/sbin/pbs_sched [options]There are no required options for the scheduler. See “pbs_sched” on page 88 of the PBS Professional Reference Guide for more information and a description of available options
•The server gets a a qterm -t quick (preserving jobs)
•MoM gets a SIGTERM: MoM terminates all running children and exits
The qterm command is used to shut down, selectively or inclusively, the various PBS components. If you have a failover server configured, then when the primary server is shut down, the secondary server becomes active unless you shut it down as well.
You can specify how running jobs are treated during shutdown by specifying the type of shutdown. The type of shutdown performed by the qterm command defaults to the following, which preserves running jobs:
The following command will shut down the primary server, the scheduler, and all MoMs in the complex. If configured, the secondary server will become active:
The following command will shut down the primary server, the secondary server, the scheduler, and all MoMs in the complex:
See "qterm" on page 229 of the PBS Professional Reference Guide.
qterm -t quick qterm -s -m qterm -s -m -f 7.1.5.2.i qterm Caveats
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