Configuring Processor Cores - IBM Flex System p270 Compute Node Installation And Service Manual

About this task
The CE login must have a role of Run Diagnostics and must be in a primary group of System. This
setting enables the CE login to perform the following tasks:
v Run the diagnostics, including the service aids, certification, and formatting.
v Run all the operating-system commands that are run by system group users.
v Configure and unconfigure devices that are not in use.
In addition, this login can enable the Shutdown Group so that the use of the Update System Microcode
service aid and the shutdown and the reboot operations are available.
The preferred CE login user name is qserv.

Configuring processor cores

Learn how to increase or decrease the number of active processor cores in the compute node.
You can order your IBM Flex System p270 Compute Node with a feature that instructs the factory to
reduce the number of active processor cores in the compute node to reduce software licensing costs. The
factory uses the field core override option to reduce the number of processor cores when feature code 2319:
Factory deconfiguration of one core is ordered with a new system. This option, available on the Advanced
System Management Interface (ASMI), reduces the number of processor cores by one.
The field core override option indicates the number of functional cores that are active in the compute
node. The field core override option provides the capability to increase or decrease the number of active
processor cores in the compute node. The compute node firmware sets the number of active processor
cores to the entered value. The value takes effect when the compute node is rebooted. The field core
override value can be changed only when the compute node is powered off.
You must use this option to increase the number of active processor cores due to increased workload on
the compute node.
To change the number of functional override cores in the compute node, you must access ASMI. See
http://publib.boulder.ibm.com/infocenter/flexsys/information/topic/com.ibm.acc.psm.hosts.doc/
dpsm_managing_hosts_launch_asm.html.
For detailed information about the field core override feature, see http://publib.boulder.ibm.com/
infocenter/powersys/v3r1m5/topic/p7hby/fieldcore.htm.
Related information:
http://publib.boulder.ibm.com/infocenter/powersys/v3r1m5/topic/p7hby/viewprocconfig.htm
20
Power Systems: IBM Flex System p270 Compute Node Installation and Service Guide