Technical data

Processor Instant Capacity on Demand (iCOD)
Procedures for Changing Processor iCOD Configurations on nPartitions
HP System Partitions Guide: Administration for nPartitions, rev 5.1 412
NOTE The following nPartition changes also can cause iCOD software to
activate a different number or set of the nPartition’s processors: adding
and removing cells from an nPartition, making cells active or inactive, or
configuring or deconfiguring processors from cells in the nPartition.
Activating and Deactivating Processors with iCOD
This procedure (using the icod_modify -a... or icod_modify -d...
command) activates or deactivates processors in an nPartition with
iCOD.
NOTE Activating or deactivating processors can affect your billing for iCOD
services.
On systems with HP processor set (Pset) software installed: newly
activated processors are assigned to the default Pset, and deactivated
processors are removed from the Pset to which they were assigned.
HP’s iCOD software selects processors for activation or deactivation by
following the appropriate processor installation order for the machine
type. The iCOD utilities select processors based on their physical
location in the server (not their HP-UX CPU IDs).
For example, on HP Superdome servers the processor install order for
each cell is: first processor slot 0, then slots 3, 1, and 2.
As a result, all active cells in a Superdome nPartition always have
processor 0 activated because a minimum of one processor must be
activated per cell. Then, as needed to meet the iCOD “requested active
processors” number for the nPartition, each cell’s “processor 3” slot is
activated, then each cell’s “processor 1” slot, and finally the “processor 2”
slots.
Step 1. Login to the nPartition in which you will be activating or deactivating
processors.
You can activate or deactivate processors in only the local nPartition (the
nPartition in which you issue the icod_modify command).