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

Shutting Down a Partition with Instant Capacity Cores
The Instant Capacity software saves information about the number of active cores for each partition,
and this information expires over time. If the partition is not active (but the hardware is powered
up), Instant Capacity software on other partitions assumes that all cores in the inactive partition
are active unless it can detect otherwise. For details about these assumed processor values, see
“Assumed Values in icapstatus Command” (page 157).
These are the general rules the Instant Capacity software uses:
• If the partition is to be shut down for less than 12 hours, no action is necessary.
• If the partition is to be shut down for more than 12 hours, consider powering the cells off, or
shutting the partition down using the shutdown -R -H command.
• If the partition crashes or shuts down abnormally, reboot the partition within 12 hours or power
it off.
IMPORTANT: If you shut down a partition for 12 hours or more, also power it off to avoid
additional charges. To power off the partition, execute the PE command from the system MP.
On HP-UX systems, always use the shutdown command when shutting down or rebooting an
Instant Capacity partition. For information about the shutdown command, see shutdown(1M).
On OpenVMS systems, always use the sys$system:shutdown.com procedure when shutting
down or rebooting an Instant Capacity partition.
Instant Capacity and Reinitializing the nPartition (Genesis Partitions)
Any use of the CC command at the service processor level has the potential to overwrite the Instant
Capacity configuration, and is therefore not recommended on Instant Capacity systems. In particular,
creating a Genesis Partition on an Instant Capacity system is not recommended because it causes
the system to be out of compliance.
If you clear the configuration of a system that has Instant Capacity components (components without
usage rights), you must acquire and apply a codeword that restores a lost iCAP configuration to
remain in compliance with your contract. Because the codeword can be generated only by using
a recent audit snapshot of the system, generate an audit snapshot with icapstatus -s before
doing the reset or, if asset reporting is configured, make sure that a recent asset report was sent
to the portal.
par Commands from PC System Management Station
Use of par commands (such as parmodify or parcreate) can cause changes to a complex that
affect the Instant Capacity state of the complex. Therefore, if a par command is executed on an
Instant Capacity complex from a PC System Management Station (SMS), the command must be
directed towards a HP-UX partition in order to succeed so that the Instant Capacity software can
authorize the change. The par commands support this functionality through the -h option.
For more information, see parmodify(1M), parcreate(1M), and parremove(1M).
Instant Capacity Compatibility with Processor Sets (HP-UX)
Overview
The Instant Capacity software successfully coexists with processor sets (psets).
To coexist with psets, the Instant Capacity software activates and deactivates cores in only the
default processor set. Cores in nondefault processor sets are not activated or deactivated.
Shutting Down a Partition with Instant Capacity Cores 161