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Chapter 5. Capacity Upgrade on Demand Features
This chapter is intended for system administrators to use as a reference if the system has any Capacity
Upgrade on Demand features. Read this chapter for more information about those features, including how
to activate or deactivate them.
Capacity Upgrade on Demand
The Capacity Upgrade on Demand (CUoD) features available on your system allow the system to be
manufactured with additional capacity, such as processors and memory. The hardware is delivered with
these features built in, ready to be activated when you need them. If your system is ordered with a CUoD
feature, you can activate the feature and pay for the increased processing power as your needs grow.
CUoD features enable you to start small, and then increase your processing capacity without disrupting
any of your current operations.
After your system with the ordered CUoD features is delivered, you can activate those features in the
following ways:
v Capacity Upgrade on Demand (CUoD) for processors
v Capacity Upgrade on Demand (CUoD) for memory
v On/Off Capacity on Demand - for processors
v Trial Capacity on Demand - for processors or memory
These choices allow you to try CUoD features for a period of time or to permanently activate features that
you decide you need. On/Off Capacity on Demand allows you to use additional capacity when you need it,
and then to turn it off.
Processor CUoD
When you activate processor CUoD, additional processors are permanently activated and usable on your
system. Processor CUoD enables you to handle business peaks or add new workloads without having to
reboot the server.
For further information about activating processor CUoD on your system, refer to "Activation Process for
CUoD Features" on page 31, or refer to the IBM Hardware Management Console for pSeries Installation
and Operations Guide, order number SA38-0590, that was delivered with your hardware management
console.
Memory CUoD
When you activate memory CUoD, it is permanently activated and usable on your system. Memory CUoD
enables you to handle business peaks or add new workloads without having to reboot the server.
For further information about activating memory CUoD on your system, refer to "Activation Process for
CUoD Features" on page 31, or refer to the IBM Hardware Management Console for pSeries Installation
and Operations Guide, order number SA38-0590, that was delivered with your hardware management
console.
On/Off Capacity on Demand
On/Off Capacity on Demand allows you to use extra processor resources that are available on your
system. On/Off Capacity on Demand is ordered ahead of time so that the capacity is available on the
system when it is needed. When you have finished using the extra capacity, you can turn it off and save
the remaining time until the resource is needed again. You use an activation code to order the amount of
usage time. Turning the processors on and off is performed from the HMC interface.
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