HP Instant Capacity Version 10.x User Guide (5900-1581, March 2011)

Example 5 Deactivating an Active Core (HP-UX)
> /usr/sbin/icapmodify -d 1
2 cores are intended to be active and are currently active.
NOTE: In Example 5, the core deactivation is instant (that is, does not require a reboot). To defer
deactivation until the next reboot, use the -D option with the command. For details, see
icapmodify(1M).
The icapmodify command allows you to either deactivate cores with the -d option or to set the
total number of active cores with the -s option. For example, the icapmodify -d 1 command
deactivates 1 additional core in a partition. The icapmodify -s 2 command sets the total
number of active cores in a partition to 2.
Overriding Deferred Activation and Deactivation
NOTE: Although this section discusses only activation of cores, the discussion applies also to
deactivation of cores.
If you have performed a deferred core activation (using the icapmodify -D command), and the
intended number of active cores specified is no longer desirable, you can override the (pending)
deferred activation by performing another deferred or instant icapmodify operation. This second
operation overrides the first activation.
You might experience one of the following scenarios with deferred activation:
• The deferred number of active cores was incorrect and you want it to be correct when the
system reboots.
• The entire deferred operation was accidental and you want to undo it.
Example 6 and Example 7 describe how to override these situations.
44 Using Instant Capacity to Manage Processing Capacity