pVM14 - PowerVM Editions Overview

8/6/2019 pVM14 - PowerVM Editions Overview

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2010 IBM Corporation

pVM14PowerVM Editions and Power Systems VirtualizationAnandakumar MohanSTG Lab Services, [email protected]

IBM POWER Systems and System Storage Symposium Sept 6-9 Bangalore, India


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Agenda

Power Systems Virtualization Overview

Power Systems Virtualization Matrix

PowerVM Editions


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Networks and network storage

Unassignedon demandresources

Hypervisor

i5/OS*

Serviceprocessor

Processors

Memory

Linuxpartitions

HardwareManagement

Console(HMC)

Virtualization Architecture

Virtual Network

AIX 5LV5.2

Expansion slots

AIX 5L V5.3partitions

Virtual processors Virtual adapters

VirtualI/O

server

Linuxkernels

AIX 5Lkernels

SLICVirtual

network& storage

Local devices & storage

Workload management and provisioning


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Simultaneous multithreading

POWER4 (Single Threaded)

CRL

FX0

FX1

LSO

LS1

FP0

FP1

BRZ

Thread1 active

Thread0 active

No thread active

Utilizes unused execution unit cycles

Natural fit with superscalar out-of-order execution core

Dispatch two threads per processor: Its like doubling the number of processors.

Net result:Better performanceBetter processor utilization

POWER7 processor supports 4 SMT threads

Appears as 2 CPUsper physical CPU to

the operatingsystem

S

ystemt

hrough

put

SMTST

POWER6 (simultaneous multithreading)


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Micro-Partitions Micro-partition is a type of logical partition where the processor is shared among other micro-

partitions in the system. The processors are shared from a CPU pool called shared pool.

Micro-partition is also referred to as shared partitions. 10 micro-partitions per activated processor

supported.

Allows significantly increased overall utilization of processor resources within the system.

The micro-partition is provided with a processor entitlementthe processor capacity guaranteed to it

by the POWER Hypervisor. A micro-partition must have a minimum of 0.1 of the capacity of aphysical processor and can be up to the capacity of the system.

In Micro-Partitions, the processors are represented through Virtual Processors that are scheduled onphysical processor by hypervisor based on the configured capacity of the partition

Two modes supported Uncapped Mode (The processing capacity can exceed the entitled capacity when resources are

available in their Shared-Processor Pool. Extra capacity is distributed on a weighted basis. Youmust specify the uncapped weight of each micro-partition when it is created.

Capped Mode (The processing capacity given can never exceed the entitled capacity of themicro-partition)


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Micro-Partitioning

Increased number of LPARs

Micro-partitions: Up to 254

Configured via the HMC

Number of logical processors

Minimum/maximum

Entitled capacity In units of 1/100 of a CPU

Minimum 1/10 of a CPU

Variable weight

% share (priority) of

surplus capacity

Capped or uncapped partitions

Micro-partitions

Pool of 6 CPUs

Linux

i5/OSV5R3**

A

IX5LV5.3

A

IX5LV5.3

Linux

Entitledcapacity

Hypervisor

Min

Max

AIX5LV5.2

AIX5LV5.3

DynamicLPARs

WholeProcessors


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Micro-partition Technologies

Related Micro-partition technologies

Multiple Shared-Processor Pools (A new capability supported onPOWER6 servers. This capability allows a system administrator to

create a set of micro-partitionswith the purpose of controlling theprocessor capacity that can be consumed from the physicalshared-processor pool.)

DB2 cores to license: 5 instead of 8

Max Cap for pool # 1 = 5 Procs

Total VPs for DB2 LPARs =8

WAS cores to license: 6 instead of 14

Max Cap for pool = 6 Procs

Total VPs for WAS LPARs =14


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Dedicated processor sharing

POWER6 processors in a dedicated partition can donate unused capacity to theshared pool.

The excess (donated) dedicated capacity can be utilized by uncapped sharedpartitions in addition to the shared processors.

The dedicated logical partition has a donation option that can be enabled for theHMC panel. This is done by an interrupt mechanism between the OS and thePOWER Hypervisor (same behavior as shared processor micro-partitions).

Idle CPU


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In case of processor failure If no unassigned processors available

The partition can acquire a replacement processor from logical partition with a loweravailability priority

Allow the logical partition with the higher partition-availability priority to continue running after

a processor failure

Processor recovery: Partition availability priority

ServerConfiguration

AvailabilityPriority Update


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Active Memory Sharing Active Memory Sharing will intelligently flow memory from one partition to another for

increased utilization and flexibility of memory usage.

Memory virtualization enhancement for Power Systems Memory dynamically allocated based on partitions workload demands Contents of memory written to a paging device Improves memory utilization

Designed for partitions with variable memory requirements

Low average memory requirements

Active/inactive environments Workloads that peak at different times across the partitions

Supports over-commitment of physical memory with overflow going to a pagingdevice.

Users can define a partition with a logical memory size larger than the available physical

memory.

Users can activate a set of partitions whose aggregate logical memory size exceeds theavailable physical memory.


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DedicatedProcessor

LPARFinance

70 GB

LPAR#3

LPAR#1

LPARVIOS

LPAR#2

DedicatedProcessor

LPARPlanning

105 GB 105 GB105 GB 5 GB60 GB

Power Hypervisor

Micro-Partition Processor Pool

AIXIBM iLinuxAIXAIX

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

Memory Pool: 210 GB

M

M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

M M M

Total Defined Memory450 GB

Physical Memory350 GB

Shared Memory Pool210 GB

350 GB Memory

M

AIX

Active Memory Sharing Configuration

Shared Memory PoolPaging Devices

Disk4

Disk3

Disk2

Disk1


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Active Memory Expansion Active Memory Expansion increases a systems effective memory capacity.

Active Memory Expansion employs memory compression technology totransparently compress in-memory data, allowing more data to be placed intomemory and thus expanding the memory capacity of POWER7 systems.

Benefits: Higher Consolidation LPAR throughput increase

The memory expansion factor is specified as a multiplier of a LPARs true memorysize:

LPAR_expanded_mem_size = LPAR_true_mem_size * LPAR_mem_exp_factor

AME Planning tool can be used for determining the expansion factor and CPUoverhead

Requires separate license to activate AME at the server level


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Active Memory Expansion

POWER7 advantage

Expand memory beyond physical limits

More effective server consolidation Run more application workload / users per partition Run more partitions and more workload per server

Expandmemory

Truememory

True

memory

Truememory

Truememory

Truememory

Truememory

Expandmemory

Expandmemory

Expandmemory

Effectively upto 100% more

memory

Expandmemory

Expandmemory


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Active Memory Expansion

Innovative POWER7 technology

For AIX 6.1 or later

For POWER7 servers

Uses compression/decompression to effectively expand the true physical memoryavailable for client workloads

Often a small amount of processor resource provides a significant increase in theeffective memory maximum

Processor resource part of AIX partitions resource and licensing

Actual expansion results dependent upon how compressible the data being used inthe application

Tool amepat available to identify compression possible on a given workload andapproximate CPU utilization


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M Physical/true memory

G Gained memory capacity

MMM

MMM

MMM

MMM

MMM

MMM

MMM

MMM

96 GB LPAR1

MMM

MMM

MMM

MMM

MM

M

MM

M

MM

M

MM

M

120 GB LPAR1

GGG

GG

GScen

ario1:expandmem

oryin

constrained

partition

96120G

B

Scenario2HoldLPAR1

capacity,useadditional

capacityforLPAR296 96+48=144GB

MMM

MMM

MMM

GGG

MM

M

MM

M

GG

M

GG

G

96 GB LPAR1

MMM

GGG

MM

M

MM

G

48 GB LPAR2

Assumes25%

expansion

Assumes50%

expansion

Active Memory Expansion Basic Concept


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Virtual I/O Server

Implements I/O virtualization by allowing physical network adapters and SCSI adapters to beshared by multiple partitions.

Helps overcome the limitation by maximum physical I/O slots supported and improves overall

system resource utilization.

Virtual I/O server is hosted as a separate partition, created as of type Virtual I/O server

Virtual I/O server owns physical I/O adapters, resources that are shared with other partitions on

the system (called client partitions)

Some components Virtual Ethernet Supported by Hypervisor by means of implementing a Layer 2 Virtual

switch. It allows partitions within the system to communicate with each other without physicaladapter.

Shared Ethernet Adapter A Layer 2 bridge created on Virtual I/O server to bridge severalvirtual networks with in the system to external network

Virtual SCSI Supported by Virtual I/O server to share physical SCSI, FC disks with multiplepartitions. It can export logical volumes or entire disk to client partitions. Optical device suchas CD-ROM is supported as well.

Virtual Optical devices Supported by VIO server to create virtual optical devices which canbe shared as RAM or ROM to multiple LPARs.


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Virtual I/O server architecture


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Integrated Virtual Ethernet (IVE)

IVE offers an alternative to the use of virtual Ethernet or the Shared EthernetAdapter service of the Virtual I/O Server. Supported only on platforms that are entry,midrange platforms that are POWER6 or above

IVE offers greater throughput and lower latency than PCIe or PCI-X bus connectedEthernet adapters as it is connected to the GX+ bus of the POWER6-based Systemp server.

IVE also provides special hardware features that enables logical Ethernet adapterswhich can communicate directly with logical partitions running on the system.

IVE refers to the collective name referring to a number of technologies including

Hardware - Host Ethernet Adapter (HEA), Software components and PowerHypervisor functions


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Integrated Virtual Ethernet


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Integrated Virtual Ethernet Components


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Implementing IVE


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Live Partition mobility

Move running partitions from one POWER6/POWER7 system to another Live (active) partition mobility Inactive partition mobility

Provides non-disruptive system maintenance flexibility Reduce planned down time by dynamically moving applications from one server to another.

Environment and system resource optimization option Can balance workloads and resources Can also be used as a mechanism for server consolidation Provides greater control over the usage of resources in the data center

Live Partition Mobility can be automated and incorporated into system management tools andscripts


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Live Partition Mobility POWER6 & POWER7 feature


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Implementing Live Partition Mobility


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NPIV (N_Port ID Virtualization)

N_Port ID Virtualization (NPIV) provides direct Fibre Channel connections from clientpartitions to SAN resources , simplifying SAN management

N_Port ID Virtualization (NPIV) is a fibre channel industry standard method forvirtualizing a physical fibre channel port.

Fibre Channel Host Bus Adapter is owned by VIOS partition

NPIV allows one physical port to be associated with multiple N_Port IDs (WWPNs),so a physical fibre channel HBA can be shared across multiple guest operating

systems in a virtual environment.

On POWER 6, NPIV allows CLIENT logical partitions(LPARs) to have dedicatedN_Port IDs (WWPNs), giving the LPAR a unique identity to the SAN, just as if it hada dedicated physical HBA(s).

Client LPAR WWPNs become part of the partition definition and move with the clientfrom server to server (LPM)

Supported with PowerVM Express, Standard, and Enterprise Edition Supports AIX 5.3 and AIX 6.1 partitions with 8Gb PCIe adapter


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Hypervisor

vSCSI Functional Flow

LVM

AIX

LVM

VSCSIVSCSI

target

VIOS 1

SAN

multipathing

Disk Driver

LVM

VSCSI

target

VIOS 2

multipathing

Disk Driver

VSCSI

multipathing

Disk Driver

fibre channel

HBAs

fibre channel

HBAs


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Hypervisor

NPIV Functional FlowAIX

LVM

VFC

HBA

passthru

module

VIOS 1

SAN

passthru

module

VIOS 2

VFC

HBA

multipathing

Disk Driver

fibre channel

HBAs

fibre channel

HBAs


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WPAR Manager for Managing WPAR

WPAR and WPAR manager are support only with AIX 6.1 and above

WPAR Manager is a Management Tool for managing multiple WPARs on different server

instances

Provided as separate LPP

Available as Plugin with IBM Systems Director

WPAR Live Application Mobility LPP is available only with WPAR Manager Is available as part of AIX Enterprise Edition

Or can be purchased separately as IBM Systems Director Plugin


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PowerVM Lx86

Lx86 - PowerVM Lx86 enables to run a wide range of x86 Linux applications on PowerSystems platforms within a Linux on Power partition. This feature is designed to support theconsolidation of x86 applications onto the Power platform


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Effective I/O sharing, Workloadconsolidation

VIO Server

NPIV

IO Virtualization

Enable Live mobility withminimum downtime

Live Partition Mobility

Live Application Mobility

Mobility Feature

Improves effective memoryutilization, workloadconsolidation

AMS

AME (Power7)

Memory Virtualization

Improves effective processorutilization, workloadconsolidation

Micro partitioning

Shared Processor Pool

Multiple Shared Processor pool

Dedicated processor sharing

Processor Virtualization

Isolate workload in different

logical environments

LPAR

WPAR

Workload Isolation

Key BenefitsPowerVM featureCategory

Power Systems Virtualization Matrix


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PowerVM - Editions

PowerVM is available in different editions comprising of different capabilities. Customer can choose the right one based on theneed.


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References

PowerVM Information Roadmap http://publib.boulder.ibm.com/eserver/roadmap_powervm.html

PowerVM Virtualization Managing and Monitoring http://www.redbooks.ibm.com/redpieces/abstracts/sg247590.html?Open

PowerVM Virtualization on IBM System p: Introduction and Configuration FourthEdition

http://www.redbooks.ibm.com/abstracts/sg247940.html?Open

Integrated Virtual Ethernet Adapter Technical Overview and Introduction http://www.redbooks.ibm.com/abstracts/redp4340.html?Open

PowerVM Live Partition Mobility on IBM System p http://www.redbooks.ibm.com/abstracts/sg247460.html?Open

Workload Partition Management in IBM AIX Version 6.1 http://www.redbooks.ibm.com/abstracts/sg247656.html?Open


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pVM14 - PowerVM Editions Overview

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