HP XC System Software Administration Guide Version 2.1

________________________ Notes ________________________
Be sure to use the --full optio n if you want to shut down the head node. By
default, the stopsys comm and keeps the head node up.
When you attempt to shut do wn the HP XC system from a node other than the head
node, a warning message is displayed and the operation stops. The --force
option of the stopsys comm and overrides this condition and en ables you to
continue the system shutdow n.
The stopsys command initiates a shutdown command on the nodes and starts a countdown.
The stopsys command forces a power down on the node if it does not power down after the
countdown. You can use the --hard option to ignore the countdow n and pow er the nodes
down immediately.
See the stopsys
(8) manpage for additional information about this command.
2.3 ShuttingDownOneorMoreNodes
You can shut down only certain nodes by specifying them in a nodelist parameter. The
following example shuts down nodes n2, n3,andn5:
# stopsys n[2-3,5]
See the stopsys(8) manpag e for more information about the stopsys command.
2.4 Managing Node Power
The power command a llo ws you to control the power to a set of nodes a nd allows a node’s
power state to be queried. With this comm and you can do the following:
• Determine the node’s current power status (Section 2.4.1)
• Turnonpowertoanode(Section2.4.2)
• Turn off a node’s power (Section 2.4.3)
• Cycle (that i s, turn off, then turn on) a node’s p ower (Section 2.4.4)
• Locate an individual node (some mode ls do not support this feature) (Section 2.4.5)
2.4.1 Determining a Node’s Power Status
You can determine a node’s power status by using the power command with the --status
option and specify ing the node by its node name:
# power --status n2
ON
Valid power states are ON, OFF,orFAILED.
Specifying more t han one node lists the nodename as well as the status, as shown here:
# power --status n1 n2
n2 ON
n1 ON
You can request the po w er status of all nodes by omitting the nodelist par a meter. This
returns all the nodes whose status is either ON or OFF:
# power --status
.
.
.
n2 ON
n1 ON
2-2 Starting Up and Shutting Down the HP XC System