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Commonwealth of MassachusettsStatewide Strategic IT Consolidation (ITC) Initiative
CDC Infrastructure Virtualizationand Shared Services
Technical Briefing Presentation
CDC Strategic IT Consolidation (ITC) Initiative
15-Nov-10 by Thanurath Liamnark Contact Us : [email protected]
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Agenda
• Key Findings & Benefits
• Virtualization Overview
• VM Architecture
• VM Comparison
• VM Cost
• Recommendation
• Reference
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Key Findings
Shared Services presents multiple benefits to the VM:
Cost Reduction and Avoidance through shared infrastructure, labor, and licensing
Green IT and the efficient use of power, cooling, and resources
Increased Agility and the ability to implement new services and applications quicker
Increased Availability through the use of a world-class tier-1 datacenter architecture
Reduced Administration time through a centralized model of support and access
Better Capacity Management and scalability through a larger pool of datacenter resources
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1. You can run one or more applications that are not supported by the Host O/S2. Better security and isolation, since malfunctions or malware infection of a guest O/S
does not affect the others3. Peace of cake creation of test environments4. Easy cloning of virtual machines on the same physical hardware or across servers5. Snapshot technique which enables you to revert back to a specific point in time.
Especially useful in case of configuration changes and service pack and patchesmalfunctions.
6. Excellent recovery scenarios if you backup in VM level. Since VMs are abstracted
from hardware you can easily move/restore them to new physicals servers withoutcomplications
7. Better utilize hardware resources. VM management software allows you to configurehardware to virtual resource partitioning and utilization. For example you can setspecific CPU thresholds, memory allocation, disk space allocation, I/O structures, etc.Also you can let the virtual machine monitor to decide the resources allocation
according to utilization.8. Reduce physical space consumption and reduce hardware costs. You have fewerservers to buy.
9. Benefit from the licensing models many O/S vendors as Microsoft are providing. Forexample, if you buy Windows 2008 ENT edition you get licenses for 4 virtualmachines.
Benefits of virtualization
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Our Infrastructure Virtualization Maturity Model (IVMM), which covers servephased approach to integrating and aligning IT services to business require
customers move up through the model.
INFRASTRUCTURE VIRTUALISATION MATURITY MODEL
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A Brief History of Server Virtualization
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Types of Virtualization
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Comparison of virtualization methods
1. Binary Translation2. Hardware Assisted3. Paravirtualization
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Binary Translation
In binary translation the virtualization layer sits at CPU privilege level 0 (mostprivileged). The Guest O/S system were supposed to run on level 0, but sincevirtual layer occupies that level, it moves guest O/S execution at privilege level 1and leaves user applications at level 3 as it supposed to be. The non-virtualizable kernel code of the guest O/S is translated by virtual layer into newsequences of instructions that have the intended effect on virtual hardware, whileuser level code is directly executed on the CPU for high performance. The
benefit of this approach is that the O/S is fully abstracted from the underlyinghardware thus it doesn’t require any modification.
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Hardware Assisted
In hardware assisted virtualization the virtual layer sits in a new root modeprivilege level under level 0. Guest O/S privileged and sensitive calls are set toauto trap to the hypervisor while user request are executed directly to the CPU forhigh performance. Hardware assisted virtualization requires a compatible CPUlike intel VT-x and AMD’s AMD-V to work. This technique is not performing asexpected because of the high overhead between guest O/S-to-hypervisortransition. On the other side hardware assisted virtualization is the future and we
are expecting to see improved performance in next generation releases. At thismoment this technique is utilized in specific cases by vendors like VMware suchas for 64-bit guest support on Intel Processors. O/S is still fully abstracted fromthe underlying hardware thus it doesn’t require any modification.
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Paravirtualization
In paravirtualization the Guest O/S kernel is modified to provide a special APIthat can be used by the virtual layer to translate non-virtualizable instructionswith hypercalls. Virtualization layer interacts directly with guest O/S thus its lowervirtualization overhead and better performance, though it can vary depending onthe workload. Since paravirtualization requires kernel modification it is not suitedfor O/S like MS windows which kernel cannot be modified. Also in productionenvironments deep kernel modification is a matter of question since it introduces
significant support and maintability issues.Paravirtualization is used in many cases by vendors in conjunction with binary orhardware assisted technique to provide better performance. Example of this areVMtools which are a set of drivers and tools that allow virtual layer to interactwith Guest O/S for better performance and manageability but not in the CPUlevel.
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Comparison Structure of virtualization methods
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BinaryTranslation
HardwareAssisted
Paravirtualization
Guest O/Smodification
Unmodified Unmodified Modified
Compatibility Excellent Excellent Poor
Performance Good Fair (will beimproved in nextgenerations)
Good
Vendors Vmware ,Microsoft,Parallels
Vmware,Microsoft,Parallels, Xen
Vmware, Xen
Comparison Performance of virtualization methods
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Microsoft Hyper-V architecture
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VMware architecture
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Citrix XenSrver architecture
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Name VMware ESX Server Hyper-V Server 2008 R2 Xen Server
Creator VMware Microsoft Xensource
Host CPU x86, x86-64
x64 + hardware-assisted
virtualization (Intel VT-x or
AMD-V)
x86, x86-64, IA-64
Guest CPU x86, x86-64x64, x86 (up to 8 physical
CPUs) (Same as host, up to 128physical CPUs)
Host OS(s) no host OS
Windows 2008 w/Hyper-V
Role, Windows Hyper-V
Server
NetBSD, Linux, Solaris
Guest OS(s)
Windows, Linux, Solaris,
FreeBSD, OSx86 (asFreeBSD), Virtual appliances,
Netware, OS/2, SCO, BeOS,
Darwin, others: runs Arbitrary
OS[3]
Windows, Linux (SUSE 10
released, more announced)
FreeBSD, NetBSD, Linux,
Solaris, Windows XP &2003 Server (needs vers.3.0 and an Intel VT-x(Vanderpool) or AMD-V(Pacifica)-capable CPU),Plan 9
License proprietary proprietary GPL
General Comparison
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Guest OS SMP available? Yes (Add-on) (up to 8 way) Yes (up to 4 vcpus per VM)Yes (v4.0.0: up to 128 vcpus per
VM)
Runs arbitrary OS? Yes Yes Yes
Supported guest OS
drivers?Yes Yes
Not required with the exceptionof the networking drivers wherea NAT is required. A modifiedguest kernel or special hardwarelevel abstraction is required forguest OSs.
Method of operation Virtualization VirtualizationParavirtualization and Porting orHardware Virtualization
Typical use
Enterprise Server Consolidation,
Business Continuity, Dev/Test,
Cloud Computing
Enterprise Server Consolidation,
Business Continuity, Dev/TestServer/Desktop Consolidation,Dev/Test
Speed relative to Host OS Up to near native[citation needed] Near native
Up to near native[15] speed.Substantial performance loss on
some workload (network anddisk intensive especially)[citation
needed]
Commercial support
available?Yes Yes Yes
Needs administrative rights? Needs Needs Needs
Feature Comparison
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Can boot an OS on
another disk partitionas guest
Yes NA Yes
USBYes
No NA
GUIYes
YesYes
Live memory
allocation
YesNo
Yes
3D accelerationYes
No Supported with VMGL
Snapshots per VM Yes Yes Yes
Snapshot of running
system
YesYes
Yes
Live migration Yes Yes Yes
Others Feature Comparison
x
x
x
VMGL (formerly Xen-GL) allows virtual machines to run OpenGL applications.
?
?
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Gartner Magic Quadrant for X86 Virtualization
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Reasons to choose
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What should be factored in acquisition cost?
Management
Licenses for
Virtual machines
operating system
Licenses for
virtualization
software
Virtualizationsoftware
Managementsoftware
Management
servers and otherinfrastructure cost
Databasessoftware andservers
Hardware VM Guest OS Management
Servers
Networking
Storage
Electricity
Datacenter space
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Summary : Standard Basic Comparison
Zero VM Downtime Host Patching
Dynamic Load Balancing
Dynamic Power Management
Basic Single Server Partitioning
Host patching hasVM downtimex
Only initial VMplacementx
No cluster-level
power mgmtx
2nd gen Microsoft
Hyper-V
VI4 Enterprise
VI4 Enterprise
VI4 Enterprise
VMware ESX /
ESXi 4.1
Live VM Migration (server to serer)Quick Migrationnot live, migratesall VMs on a LUN
xVI4 Enterprise
Live VM Migration (disk to disk) Not availablex VI4 Enterprise
Memory Overcommit(higher VM density per host) xVMware ESX /
ESXi 4.1
Ultra-thin virtualization footprint(better reliability, security)
Over 3GB withServer Core
xVMware ESXi4.1 only 70 MB
Patching of Offline VMs No out-of-boxsupport in SCCMxUpdate
Manager
Not available
Clustered FS (enables VM restart &migration indpnt of LUN mapping) x VMFS NTFS
High Availability(failover individual VMs) VI4 HA
MSCS, but mustfailover all VMson a LUN
XenServerEnterprise
XenServer
Enterprise
XenServer
Enterprise
XenServerEnterprise
XenServerEnterprise
XenServer
required 1.8GB Diskspace
No UpdateManager
Via StorageASM
Xen HA
XenServer 5.6
x
x
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Feature VMware VI Enterprise Hyper-V 2008 R2 /SMSE
Bare-metal hypervisor ESX/ESXi Hyper-V XenServer
Centralized hypervisor
managementVirtual Center SMSE (VMM) XenCenter
VMware and Microsoft
managementNone SMSE (VMM) None
VM backup VCB (proxy only) SMSE (DPM) Snapshot and Revert
VM High availability/failover Virtual Center WS08 ClusteringYes
VM Live migration VMotion NoneXenMotion® livemigration
Storage VMotion Yes Not yet Yes
Guest OS
patching/managementYes SMSE (SCCM) Yes
End-to-end OS monitoring None SMSE (Ops Mgr) None
Host/VM level optimization DRS SMSE (PRO)
Application/service monitoring
vCenter Application
Discovery
Manager/AppSpeed
SMSE (PRO)
Integrated physical and virtual
managementNone SMSE
x
VMI: VMware Infrastructure WS08: Windows Server 2008 R2
VCB: VMware Consolidated Backup SMSE: System Center Server Mana ement Suite
x
x
x
x
Summary : Others Feature Comparison
x
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VMware VS Microsoft Hyper-V
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VMware VS Citrix
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Cumulative Investment, Savings & ROI
Break event 1.7 Year
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Server Consolidation: Cost per VM
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To manage 100 VMs, MS System Center
requires at least 5 physical servers
SC Conf MgrManagementServer
SC VM MgrManagementServer
SCVMMclient
SCOMclient
SCCMclient
SC Ops MgrRoot MgmtServer
1st Server 2 nd Server 3 rd Server plus SCVMM Library Server
Note: MS recommends
separate VMM server,VMM Library, and VMM
DB for >20 hosts
Library DB
4 th Server 5 th Server
SCOM
ManagementServer
SCCM DBSCVMM DB SCOM DB +
reporting server
Hyper-V hosts with SMSE licenses
Hyper-VManager client
Source: Microsoft TechNet
Hyper-V Implementation method
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VMware Implementation method
vCenterManagement Server
VMwareInfrastructure
Client
vCenter + VUM DB
Managed ESX Hosts
2 nd
Server
1st Server
To manage 100 VM, VMware V-Center requires 2 physical
servers
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Recommendation #1
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Recommendation #1
Accelerate Virtualization
Physical servers can consistently be reduced by a conservative ratio of 15:1
• Physical Server maintenance costs reduced• Reduction in data center space, power, and cooling• Significant reduction in physical network ports• Increased management centralization reduces support burden onsecretariats to focus on application support
Cost Impact
$2.5M/ month physical server cost can be reduced by $1.5m/month throughvirtualization
Next Steps
• Virtualization-First policy needs to be enacted & enforced at the CEO andCIO levels• Create a migration plan that maximizes the migration and adoption rate toreduce costs as quickly as possible
Recommendation #2
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Recommendation #2
Adopt Dynamic Provisioning
Implementing new servers/capacity as needed rather than pre-provisioninga set amount of capacity at the beginning of the year, costs can be reducedsignificantly.
• Defer port and facility charges until needed• Capacity on demand• Capacity planning will drive monthly charge backs
Commonwealth Cost Impact
Next Steps • Virtualization-First policy needs to be enacted & enforced at the CIO andSCIO levels• Create a migration plan that maximizes the migration and adoption rate toreduce costs as quickly as possible
Cost comparison for a 1 yr period
Total Costs for 1 Year Example:- Static: $3,039,805- Dynamic: $2,531,369
SAVINGS: $508,437
Example Details:• 26 Servers Total• 10 Servers Already Running• 140 Virtual Machines to Start• Distributed VM Adoption through 12
months
Recommendation #3
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eco e dat o #3
Leverage virtualization for Business Continuity & Disaster Recovery
Virtualization increases the stability, reliability, and recoverability of your
server environment
• “Breaking the chains” hardware, software & processor • Most agency datacenters are not Tier 1• Virtual servers live on highly-redundant shared storage and can “float”
between physical host servers
• Virtual servers can be easily replicated to DR Sites (Springfield 2012) forImpact• Lower Recovery Time ObjectiveCost and Risk Impact • Less DR infrastructure lowers cost and risk• Server downtime for planned hardware maintenance can be reduced to
zero with the use of vMotionNext Steps
• Prioritize the physical server workloads and classify the data and applications • Determine criteria for advanced recovery options based on defined classifications
Recommendation #4
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Develop Cloud Readiness Model and Plan
IaaS, PaaS, and SaaS delivered as part of a cloud strategy that employs
virtualization will lower the overall total cost of ownership
• Collect performance and configuration data on all servers• Assess applications for latency effects of moving to internal cloud• Analyze data, build list of virtualization candidates• Define test plan
• Migrate remaining servers per plan
Commonwealth Cost ImpactShared services, standards for provisioning and decommissioning of serverswill simply infrastructure deployment, lower cost and help mitigate risk
Next Steps• Develop Cloud Strategy and high level business case• Develop Cloud Roadmap and implementation plan• Deliver Proof-of-Concept
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ITBully.COM “Virtualization, Paravirtualization, whatever you say!?!?” http://itbully.com/articles/virtualization-paravirtualization-whatever-you-say
Wikipedia
Virtualization paper – http://en.wikipedia.org/wiki/Virtualization
Comparison of platform virtual machines – http://en.wikipedia.org/wiki/Comparison_of_platform_virtual_machines#Other_features
Microsoft Hyper-V paper -
http://en.wikipedia.org/wiki/Hyper-V
VMware
VMware Cost-Per-Application Calculator – http://www.vmware.com/technology/whyvmware/calculator/
Comparison of Hypervisors by VMware -
http://www.vmware.com/technology/whyvmware/architectures.html#c132894
Why choose VMware? - http://www.vmware.com/files/pdf/vmware_advantage.pdf
VMware vSphere 4.1 Features and Benefits Compared to Microsoft Hyper-V R2, Citrix XenServer5.6 and Red Hat Enterprise Virtualization 2.2 KVMhttp://www.vmware.com/files/pdf/vmware-vsphere-features-comparison-ch-en.pdf
References and Further Reading
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Citrix
XenServer features by edition -
http://www.citrix.com/English/ps2/products/subfeature.asp?contentID=2300456
Microsoft
Virtualization with Hyper-V: Supported Guest Operating Systems – http://www.microsoft.com/windowsserver2008/en/us/hyperv-supported-guest-os.aspx
Hyper-V Server 2008 R2 -http://www.microsoft.com/hyper-v-server/en/us/default.aspx
Gartner
Magic Quadrant for x86 Server Virtualization Infrastructure : Gartner May2010 -http://www.vmware.com/files/pdf/cloud/Gartner-VMware-Magic-Quadrant.pdf
Virtualization with VMware or Hyper-V What You Need to Know : Gartner Webinar – http://www.gartner.com/it/content/1184500/1184548/november25_virtualization_tombittman_final.pdf
ITComparison.com
Microsoft Windows 2008 R2 Hyper-V VS VMware vSpherehttp://www.itcomparison.com/Virtualization/VMwareESX4vsMshypervr2/VMwareESX4vWindows2008R2HyperV.h
References and Further Reading
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