IBM eserver i5 Handbook page 576

5486OpS.fm
Each partition's system name is distinct and the system values can be set
independently. Each partition can have a different primary and secondary
national language and can be operated using different time zones. This flexibility
is ideal for multinational companies to centralize operations in a single location,
yet retain the national characteristics of each system.
LPAR allows for the simultaneous running of multiple independent servers, each
with its own system processor or (with V5R1 onward) with parts of shared
processors. Memory can be shared within a single iSeries server.
The iSeries LPAR capabilities have been improved with every new release since
V4R4. Enhancements with i5/OS V5R3 include:
Hardware Management Console
This is required for POWER5 processors implementing LPAR. It features a
specific NetVista workstation running Linux with preloaded HMC software to
perform multi-partition LPAR management function (and CUoD) as well as
console functions. A single HMC supports up to 160 partitions and up to 32
servers (Model 520 ,550, 570 and 595 only).
Refer to "Product Previews" on page 68 to understand the future direction of
HMC.
Dynamic creation and deletion of partitions
Partition shared processor resource specified as
570 and 595 only)
Idle processing resources may be used by that partition up to the number of
virtual processor specified.
Unallocated, powered off dedicated or newly added processor resources (via
CoD) can make part of a shared pool that is used by uncapped partitions
(Model 520 and 570 only)
Software Licensed Management (SLM) APIs
These APIs allow customers and business partners to monitor usage counts
across the system rather than for each partition.
A dynamic movement of processor, memory, and 5250 CPW performance
between partitions spreads the system workload to where resources are
needed, and potentially reduces the total amount of resource required on a
system. The granularity of this processor movement can be 1/10th of each
processor.
The capability to support partial (fractional) processors was introduced with
V5R1. The number of partitions allowed per physical processor depends on
the processor type. With IBM i5/OS and IBM Eserver i5 servers, the
maximum number of partitions per system has increased to 254.
IBM Eserver i5 and iSeries System Handbook
542
Draft Document for Review October 18, 2004
uncapped
(Model 520, 550,