Dynamic Processor Sparing; Software Licensing Considerations; Section 4.10, "Software Licensing Considerations - IBM p5 590 System Handbook

have another 30 contiguous day trial. These subsequent trials are limited to the
activation of 2 processors and 4 GB of memory.
Trial CoD is a complimentary service offered by IBM. Although IBM intends to
continue it for the foreseeable future, IBM reserves the right to withdraw Trial
CoD at any time with or without notice.

4.9.4 Dynamic processor sparing

The p5-590 and p5-595 can be configured with a pool of spare, unused
processors for dynamic processor allocation. CoD processors that have not been
activated are allocated to this dynamic processor sparing pool. If the server
detects an impending failure of an active processor, it will attempt to activate one
of the unused CoD processors from the pool and add it to the system
configuration. This helps to keep the server's processing power at full strength
until a repair action can be scheduled. The processor pool is managed by the
POWER Hypervisor and the operating system.
When the pre-installed, inactive capacity becomes necessary, an administrator
simply enters a code to activate the desired resources. The resource activation
process is addressed in 4.6, "Capacity on Demand activation procedure" on
page 91. Additionally, there are activation and configuration rules for processor
and memory resource activation on the p5-590 and p5-595 systems. This
information is summarized in 4.9, "Capacity on Demand configuration rules" on
page 103.

4.10 Software licensing considerations

Logical partitioning (LPAR) and Capacity on Demand are important elements in
the virtualization capabilities of IBM Sserver, which in turn are a key component
of the IBM on Demand strategy. Virtualization provides clients with the flexibility
to easily and dynamically adapt their infrastructure to fluctuations in their
workloads, and Capacity on Demand provides the flexibility to allow clients
nondisruptive growth and be able to enable additional processors and memory
temporarily for unplanned and unexpected peek load requirements. Software
licensing, for the operating system and for IBM middleware as well as for ISV
applications is also an important consideration, and IBM has provided
sub-capacity licensing and daily license entitlements to give clients the flexibility
to choose how they will license the operating systems and selected middleware
products to help lower the Total Cost of Operations. This section provides current
licensing rules for IBM operating systems and IBM middleware.
Chapter 4. Capacity on Demand
105