Managing Cluster Nodes; Node Types - IBM Power Systems 775 Manual

5.3 Managing cluster nodes

This section describes the process to manage the types of nodes in Power 755 cluster and
some solutions with xCAT.

5.3.1 Node types

Several types of nodes are featured in the Power 755 cluster in the xCAT database, including
four hardware nodes and one LPAR node. For the LPAR node, there are four subtype nodes
that are used to distinguish in logical function.
For more information, see the Define the Frame Name/MTMS Mapping and Define the LPAR
Nodes and Create the Service/Utility LPARs sections of the xCAT Power 775 Hardware
Management document at these websites:
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=XCAT_Power_775_Hardwar
e_Management#Define_the_Frame_Name.2FMTMS_Mapping
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=XCAT_Power_775_Hardwar
e_Management#Define_the_LPAR_Nodes_and_Create_the_Service.2FUtility_LPARs
Hardware nodes
In hardware roles, the following types of nodes are included in the Power 755 cluster:
Frame node
A node with hwtype set to frame represents a high-end IBM Power Systems server
24-inch frame, as shown in Example 5-40.
Example 5-40 Frame node in xCAT database
# lsdef frame15
Object name: frame15
groups=frame,all
hcp=frame15
hidden=0
hwtype=frame
id=15
mgt=bpa
mtm=78AC-100
nodetype=ppc
postbootscripts=otherpkgs
postscripts=syslog,aixremoteshell,syncfiles
serial=992003N
sfp=c250hmc21
The following attributes are included in Example 5-40:
– hcp: The hardware control point for this frame. For DFM, this point is always set to itself.
– id: The frame number.
– mgt: The type of the hardware control point (hcp). A bpa setting means xCAT manages
the point directly without the HMC.
– mtm: The machine type and model.
– parent: The parent for this frame. This setting is set to blank, or contains the building
block number.
Chapter 5. Maintenance and serviceability
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