5486OpS.fm Draft Document for Review October 18, 2004542 IBM Eserver i5 and iSeries System HandbookEach partition’s system name is distinct and the system values can be setindependently. Each partition can have a different primary and secondarynational language and can be operated using different time zones. This flexibilityis 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, eachwith its own system processor or (with V5R1 onward) with parts of sharedprocessors. Memory can be shared within a single iSeries server.The iSeries LPAR capabilities have been improved with every new release sinceV4R4. Enhancements with i5/OS V5R3 include: Hardware Management ConsoleThis is required for POWER5 processors implementing LPAR. It features aspecific NetVista workstation running Linux with preloaded HMC software toperform multi-partition LPAR management function (and CUoD) as well asconsole functions. A single HMC supports up to 160 partitions and up to 32servers (Model 520 ,550, 570 and 595 only).Refer to “Product Previews” on page 68 to understand the future direction ofHMC. Dynamic creation and deletion of partitions Partition shared processor resource specified as uncapped (Model 520, 550,570 and 595 only)Idle processing resources may be used by that partition up to the number ofvirtual processor specified. Unallocated, powered off dedicated or newly added processor resources (viaCoD) can make part of a shared pool that is used by uncapped partitions(Model 520 and 570 only) Software Licensed Management (SLM) APIsThese APIs allow customers and business partners to monitor usage countsacross the system rather than for each partition. A dynamic movement of processor, memory, and 5250 CPW performancebetween partitions spreads the system workload to where resources areneeded, and potentially reduces the total amount of resource required on asystem. The granularity of this processor movement can be 1/10th of eachprocessor. The capability to support partial (fractional) processors was introduced withV5R1. The number of partitions allowed per physical processor depends onthe processor type. With IBM i5/OS and IBM Eserver i5 servers, themaximum number of partitions per system has increased to 254.
