Pci Adapters; Capacity Upgrade On Demand - IBM pSeries 690 User Manual

Affinity Partitions: An affinity partition is a special type of logical partition in which processors and
system memory are allocated in a predefined way that may increase performance when running some
types of applications (memory is assigned to a processor that is in close physical proximity to it).
Affinity partitions can be created with either four or eight processors. The user determines the allocation of
I/O resources in a server with affinity partitions; only the allocation of processors and memory is
predefined.
Reassigning Partition Resources Dynamically: You can logically attach and detach a managed
system's resources to and from a logical partition's operating system without rebooting. In addition, failing
resources can be dynamically released from the owning partition, serviced and reattached, or replaced
with an acceptable replacement without disturbing the partition's activities.
Full System Partition
A special partition called the full system partition assigns all of your managed system's resources to one
large partition. The full system partition is similar to the traditional, non-partition method of operating a
system. Because all resources are assigned to this partition, no other partitions can be started when the
full system partition is running. Likewise, the full system partition cannot be started while other partitions
are running.
The HMC allows you to easily switch from the full system partition to logical partitions. The actual setup of
the operating system in a partition may require some careful planning to ensure that no conflicts exist
between the two environments.
For more detail about partitions, see the IBM Hardware Management Console for pSeries Installation and
Operations Guide, order number SA38-0590.

PCI Adapters

For complete information about removing and replacing PCI adapters, see Appendix E, "Removing and
Replacing PCI Adapters," on page 187.

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.
10 Eserver pSeries 690 User's Guide