Adding Nodes To The Cluster - IBM Power Systems 775 Manual

Login node
This LPAR node is defined to allow the users to log in and submit the jobs in the cluster.
The login node most likely includes an Ethernet adapter that is connecting to the customer
VLAN for access. For more information about setting up the login node, see the Granting
Users xCAT privileges document in the setup login node (remote client) section at this
website:
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Granting_Users_xCAT_
privileges#Setup_Login_Node_.28remote_client.29

5.3.2 Adding nodes to the cluster

You need to define the types of nodes with xCAT commands in a Power 755 cluster before
adding the nodes into the cluster.
For more information about defining cluster nodes, see this website:
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Defining_cluster_nod
es_on_System_P
There are several ways to create xCAT cluster node definitions. Use the following method that
best fits your situation.
Using the mkdef command
You use the xCAT mkdef command to create basic xCAT node definitions, as shown in
Example 5-48.
Example 5-48 Define a node by xCAT command mkdef
# mkdef -t node -o clstrn27 mgt=hmc os=AIX nodetype=ppc,osi hwtype=lpar
groups=lpar,all,compute
To get a description of all the valid attributes that might be specified for a node definition, you
run the following lsdef command:
lsdef -t node -h | pg
Using an xCAT stanza file
A stanza file contains information that is used to create xCAT data object definitions. A stanza
file is used as input to several xCAT commands. The stanza file contains one or more stanzas
that provide information for individual object definitions, as shown in Example 5-49.
Example 5-49 xCAT stanza file for nodes
# cat lpar_stanza.txt
f10c12ap01:
objtype=node
nodetype=ppc,osi
id=1
os=AIX
hcp=cec12
parent=cec12
groups=lpar,all,service,llserver
mgt=fsp
cons=fsp
hwtype=lpar
Chapter 5. Maintenance and serviceability
295