iSeries architecture: Fundamental strength of the IBM ^ i5 and iSeries 29Draft Document for Review October 18, 2004 5486AdvTech.fmuses POWER Hypervisor, as described in “POWER Hypervisor” on page 13, todeliver this virtualization support.LPAR as implemented on iSeries extends the original architectural designconcept of application execution by allowing OS/400, Linux or AIX to run in agiven partition. Extensive dynamic and granular resource sharing is allowedacross processors (SMP configurations), memory, disk, tape, and other devices,including Virtual Ethernets, which are covered in the next section. Multiplepartitions are supported for selected iSeries uni-processor models. Resourcesharing across partitions is illustrated in the following graphic.With i5/OS partitions can be defined as capped or uncapped. Capped partitionscannot exceed their assigned processor resouces. Uncapped partitions canutilize automatically extra unused processing power in a shared pool. For adetailed description refer to , “Capped and uncapped partitions” on page 52You can find more details about LPAR in “Logical partitions” on page 541.Virtual EthernetVirtual Ethernet (also referred to as Virtual LAN (VLAN)) provides the ability toprovide multiple communication paths between applications that are executed ineach logical partition. More importantly, Virtual Ethernet allows high-speedbus-to bus communication between selected OS/400 partitions and Linuxpartitions. It is possible to tie in each of the multiple communication pathsbetween partitions to a specific application. OS/400 V5R2 introduced thecapability to connect Integrated xSeries Servers and Integrated xSeries Adaptersvia Virtual Ethernet.
