HP XC System Software Administration Guide Version 3.2

Note:
Nodes that are disabled either as a result of a critical service configuration failure or with the
setnode --disable command cannot be started with the startsys command until they are
enabled with the setnode --enable command.
You can start up only specified nodes by specifying them in a nodelist parameter. The following
example starts up nodes n2, n3, and n5:
# startsys n[2-3,5]
The startsys command has a number of command-line options, along with corresponding
environment variables and configuration file options, that influence its behavior. One such option
is the --max_at_once= n option, which enables you to limit the number of nodes that you turn
on at a time, decreasing the power surge.
In addition to booting the nodes, you have the option to image the nodes, that is, to synchronize
key software on the nodes with the golden image, a centralized collection of software for the
nodes. The golden image and software distribution are discussed in Chapter 11: Distributing
Software Throughout the System (page 139).
For additional information about the startsys command, see startsys(8).
The following sections provide procedures for starting nodes that do not need imaging, for
imaging and starting nodes, and for restarting a node to image it.
3.2.1 Starting All Nodes
The following procedure describes the steps necessary to start the HP XC system from the head
node. In this procedure, all the enabled nodes that do not require imaging are booted. “Disabling
and Enabling a Node” (page 58) describes how nodes are enabled and disabled.
1. Log in as superuser (root) on the head node.
2. Start all nodes on the system with the startsys command:
# startsys
Alternatively, you can specify a single node or a list of nodes.
3. If your system has been configured for improved availability, enter the transfer_to_avail
command to transfer control to the availability tool:
# transfer_to_avail
For additional information on options that affect booting, see startsys(8).
3.2.2 Determining Which Nodes Require Imaging
The startsys command features a --test option, which returns a list of nodes that require
imaging, as shown here:
# startsys --test
Enabled nodes: n[9-16]
Removing the execution node: n16
Boot hierarchy of specified nodes is: n15 n[9-14]
Nodes that require imaging - use --image_and_boot -> n[13-14]
Test completed.
startsys process exiting with code 0
3.2.3 Imaging and Starting Nodes
The following procedure describes the steps necessary to start the HP XC system from the head
node. In this procedure, all the enabled nodes that need imaging are imaged, then the enabled
nodes are booted.
1. Log in as superuser (root) on the head node.
3.2 Starting Up the HP XC System 55