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– A logical partition can have more than one partition profile, bu at least one as a
minimum requirement.
All resources dedicated partition profile
A partition profile that contains the entire resource list of the machine, using all physical
resources working as one system.
System profile
– A system profile is an ordered list of partition profiles. When you activate a system
profile, the managed system will attempt to activate the partition profiles in the defined
order.
– To enhance the flexibility to use the system within several different logical
configuration, a system profile can be defined to collect more than one partition profile
to provide the requested system behavior.
2.12.5 Hardware requirements for Micro-Partitioning
To implement the Micro-partition concept on a POWER5 processor-based system, resource
planning is important to have a base configuration and enough flexibility to make desirable
changes to the running logical partitions. To configure a Micro-partition, the minimum
requirements needed are processors, memory, and possibly an expansion unit to define more
Micro-partitions than possible in a single system.
Processors
Within POWER5 technology, and depending on performance requirements, a logical partition
can be created by using a shared processor pool or a dedicated processor.
Shared processors can be defined by a fractional number of 1/10 as minimum requirement of
a real processor. To calculate the required processor power, a real processor is divided in
100 processing units, and 1/10 of a processor is equal to 10 processing units.
Dedicated processors are entire processors that can be assigned to a single logical partition
without the capability to share free capacity with other logical partitions.
Memory
Depending on given application and performance requirements, a logical partition requests
memory to execute the installed operating system and application. To create Micro-partitions,
the minimum memory requirement is 128 MB per logical partition and dynamically increased
by increments of 16 MB from the overall memory available in the system.
Expansion unit
Expansion units extend the flexibility of the server system to enlarge the number of possible
logical partitions by adding additional hardware, such as storage or network devices.
2.12.6 Specific partition definitions used for Micro-partition
In addition to the base definitions for a Micro-partition, new parameters must be defined to
receive more flexibility and capacity usage of logical partitions included in POWER5
technology.
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p5-550 Technical Overview and Introduction
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