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52 p5-570 Technical Overview and Introduction
3.1 Capacity on Demand
p5-570 systems can be shipped with non-activated resources (processors and memory),
which may be added as they are needed. Processors and memory can be brought online to
meet increasing workload demands without affecting system operations.
The CoD is supported on p5 Model 570 when the 1.65 GHz and 1.9 GHz Power5 processors
are used.
The following sections outline the different methods that are available, namely:
Processor
– Capacity Upgrade on Demand
– Reserve Capacity on Demand
– Dynamic processor sparing
Memory
– Permanent Capacity Upgrade on Demand for Memory
– On/Off Capacity on Demand
– Reserve Capacity on Demand
Processor and Memory
– Trial Capacity on Demand for processors and memory
The following sections describe the processor cards that support the CUoD features.
2-way 1.65 GHz POWER5 processor card
The base 2-way 1.65 GHz POWER5 processor card (FC 7830) features two processors (but
0 active) and eight DDR1 Memory DIMM sockets. Processors are activated in increments of
one processor, either permanently or for a given amount of time.
2-way 1.9 GHz POWER5 processor card with DDR1 memory slots
The 2-way 1.9 GHz POWER5 processor card (FC 7832) features two processors (but 0
active) and eight DDR1 Memory DIMM sockets. Processors are activated in increments of
one processor, either permanently or for a given amount of time.
2-way 1.9 GHz POWER5 processor card with DDR2 memory slots
The 2-way 1.9 GHz POWER5 processor card (FC 7833) features two processors (but 0
active) and eight DDR2 Memory DIMM sockets. Processors are activated in increments of
one processor, either permanently or for a given amount of time.
Processor and memory Capacity Upgrade On Demand and Dynamic processor sparing is
supported by AIX 5L Version 5.2 ML4 (IY56722) or AIX 5L Version 5.3. Dynamic processor
sparing requires that the CPU guard attribute is set to enable.
3.1.1 Processor Capacity Upgrade on Demand methods
This section describes the different CUoD methods that are available for the processors at
time of writing.
Note: The 2-way 1.5 POWER5 processor card does not support any CUoD feature.