IBM System P虚拟化技术

虚拟化技术 IBM System p:系列服务器分区、虚拟化技术概念与功能概述虚拟化技术虚拟化技术服务器 概念与功能概述 IBMannouncesPowerVM20082008the IBMannouncesLPAR onthemainframe19871987 IBM System pIBMannouncesfirst19731973 技术 Dynamic Micro *Planned for select p5-570 models OSApps IBM PowerVM™on System p™ Unassignedon demandresources th Fibre Channel-attached disk– Supports AIX 5L V5.3 andMicro-Partitioning– Share processors acrossmultiple partitions– Minimum partition 1/10processor– AIX 5L V5.3, Linux*, or i5/OS**Partition Load Manager– Both AIX 5L V5.2 andAIX 5L V5.3 supported– Balances processor andmemory requestManaged via HMC or IVM* SLES 9 or RHEL AS 3 and above**Available on 1.65 GHz p5-570, p5-590 and p5-595 models AIX 5L V5.3 LPAR 2AIX 5L V5.3LPAR 3LinuxUnmanagedpartitionsPLM agent HypervisorVirtual I/OpathsLPAR 1AIX 5L V5.2PLM partitionsPLM agent Advanced POWER VirtualizationManagerServerEthernetsharing *on p5-590 and p5-595 – Micro-partitions: Up to 254*– Dynamic LPARs: Up to 32*– Combination of both– Minimum/maximum– In units of 1/100 of a CPU– Minimum 1/10 of a CPU– % share (priority) ofsurplus capacity Partitioning optionsConfigured via the HMCNumber of logical processorsEntitled capacityVariable weighteach processor to be subdivided into asmany as 10 “virtual servers”, helping to i5/OS V5R3** AIX 5L V5.3 AIX 5L V5.3 MinMaxAIX 5L V5.3 AIX 5L V5.2 Ethernet SwitchExternal Servers–Partition to partition communication–Requires AIX 5L V5.3 and POWER5–Provides access to outside world–Uses Physical Adapter in the Virtual I/O Server–Provide ability for one adapter to be on multiple subnets–Provide isolation of communication to VLAN members A3 IBM System p虚拟存储A2A3A4A5 B4B5 External StorageLVM based storage on VIO ServerPhysical Storage can be SCSI or FCƒLocal or remoteVirtual SCSI devices added to partitionLUNs on VIOS accessed as vSCSI diskA1B1 IBM System p服务器 VIOPool VirtualVirtualDedicatedDedicatedSharedShared in the LPAR’ entitlement Size of partition at activation, between minimum and desiredPartition won’t start if Minimum capacity not availableCPU that can’t be exceeded in DLPAR operationCPU Capacity limited to ‘desiredCPU Capacity limited by unused capacity in ‘pool’ and ‘desired’ virtual processors IBm System p–Dedicated partitions use whole number of CPUs–Shared partitions use whole or fractions of CPUs from Shared Pool–all CPUs that are not in dedicated LPARs–Desired:–Minimum:–Maximum:–Divided among the virtual processors–Capped:–Uncapped:–Virtual cpus in an LPAR are dispatched on physical cpus in the p5 Server IBM System pVirtual Processors in Shared Processor PoolVirtual processors represent concurrent operating system operationsEntitled Capacity (physical cpu) is spread across these virtual processorsOptimal number of virtual processors depends on the workload9Number of threads9What threads are doingNumber of virtual processors (Minimum and Desired) is obtained by:9Rounding entitled capacity to next whole number9Example‰Minimum = 0.50 (entitlement) -> 1 virtual processor minimum‰Desired = 2.25 (entitlement) -> 3 virtual processors desiredMaximum number of virtual processors is 10x entitlement9Do you want maximum 0.8 entitled over 8 virtual processors?9Some art, experimentation warranted9Some workloads need more concurrence, some need fewer and more powerful virtualprocessors ‰Maximum %ent is 1000% (0.1 entitled capacity, on 1 virtual processor, uncapped) Dedicated partition gets absolute priority for these excess cycles.Sharing will only occur when the dedicated partition has not consumedall resources and the uncapped partitions that have consumed all oftheir entitled capacity Shared Dedicated CapacityƒShared Dedicated Capacity allows for the “donation” ofspare cycles for dedicated processor partitions to beutilized by the shared poolƒUser Benefits–ƒCycles of a dedicated processor are “borrowed” for ashort time to run an uncapped partition and thenreturned to the dedicated partition POWERPPUnused capacity in dedicated processor partitions can be “Donated” to sharedprocessor poolExcess cycles will only be utilized by uncapped partitions that have consumed allof their entitled capacity.PP PPPPAIX 5.3AIX 6.1Dedicated / SharedProcessorsExcess DedicatedCapacity UtilizationPPDedicatedProcessors Linux IBM PowerVM™on System p™ features Virtual I/O ServerIntegrated Virtualization ManagerLive Partition MobilityLx86 (formerly System p AVE)Logical Partitioning Micro-Partitioning™Subsystems ,在虚拟化功 服务器虚拟化功能的同时 Power 4/5 IBM System p虚拟化技术服务器在继承了. . LPAR BI WorkloadPartition AIX6 instance使AIX系统更加灵活 6 AIX AIX # 3WorkloadPartitionTraining 2. Dynamically translates and mapsx86 Linux instructions to POWERRun any 32-bit Linux/x86 user spaceapplication binary–Requires no re-compilation–Direct H/W access or apps using kernelmod’s not supportedNative & translated applicationsinteroperateTransparent to users–“It just runs” like on Linux/x86Performance: 60-80% of native–“Good Enough” for many apps–Translat