bob baxter [email protected] po box 55 pine co 80470 303-838-6448 best practices to...
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Bob Baxter
[email protected] PO Box 55
Pine CO 80470303-838-6448
Best Practices to Address the Top 3 Issues in Managing the Virtualized Data Center
Best Practices to Address the Top 3 Issues in Managing the Virtualized Data Center
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• 31 years I/T experience• 26 years managing systems
– Data center & service desk management – Operating systems– Database administration– Process automation & event notification– Document imaging and workflow– ITIL Certification (IT service mgmt best practices)– Server virtualization
A Little About Myself
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Agenda
What are “Best Practices”?
What is “Virtualization”?
What are the “Top 3 Issues”?
Summary
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What are Best Practices?
There are many I/T practices…
But which ones are the “Best”???...
Several industry organizations publish “Best” practices…
UK government OCG ITIL recognized worldwide…
Ultimately, YOUR organization will determine its own “Best Practices”
What are Best Practices?
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What is ITIL?Information Technology Infrastructure Library…
What is ITIL?
ITIL:
IT Provides Services, not Technology… .
ITIL:
Services that add VALUE … .
ITIL is a Key Management Discipline that Meshes Technology
Management and Corporate Management .
Service Strategy >> Service Design >> Service Transition >> Service Operation >>
<< Continual Service Improvement >>
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Server Virtualization
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Server virtualization has been around since the 60’s
Server Virtualization is not New!
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– EMA defines virtualization as:• “A technique for abstracting (or hiding) the
physical characteristics of computing resources from the way in which other systems, applications, or end users interact with those resources.”
What is Server Virtualization?What is Server Virtualization?
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Ap
p
OS
Hardware
Ap
p
OS
Hardware
Ap
p
OS
Hardware
Ap
p
Ap
p
Traditional Non Virtualized ServersTraditional Non Virtualized ServersTraditional Non Virtualized Servers
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Virtualization HypervisorVirtual Machine Monitor (VMM)
Ap
p
Ap
p
Ap
p
Guest OS
Guest OS
Guest OS
Hardware
Guest OS
Ap
p
Guest OS
Ap
p
Virtualized Server
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Virtualization Software
App
App
App
Guest OS
Guest OS
Guest OS
OS
Hardware
Hosted VirtualizationHosted VirtualizationHosted VirtualizationHosted VirtualizationHosted Virtualization“Generally” not “Data Center Class”
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Hosted VirtualizationHosted VirtualizationHosted VirtualizationHosted VirtualizationParavirtualization
Virtualization Software
App
App App
Guest OS Guest OS Guest OS
Hardware
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Desktop environments hosted on Servers
Thin clients on physical desktops
Citrix/VMware/Sun Ray
Desktop Virtualization
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Why Virtualization?
Based on ITIL Framework…
Service Strategy…
Service Design…
Service Transition
Why Virtualization?
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Server Sprawl!
Are Servers Really Cheap?
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Why Virtualization?Why Virtualization?
• When done properly, good stewardship of funds• One, two, or just a few x86 servers are cheap.
Combined they start to become expensive!• Consider:
– Cost of the servers themselves– Power– Cooling– Network cabling– Floorspace– Disposal
Financial Management
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Easier Service Continuity Management
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Easier Provisioning of New Servers (Services!)…
Can help speed projects through Service Lifecycle(More on this Later….)
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Before You Start…
Establish: SLA’s & KPI’s
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Deming CycleDeming Cycle
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So…. What ARE the Top 3 Issues?
1)Service Strategy: Financial Management Technology Selection: …
2) Service DesignService Level ManagementContinuity ManagementAvailability ManagementCapacity Management…
3) Service Transition: Change Management
So…. What ARE the Top 3 Issues?
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Cost
Technology
Future trends
Best Practice Issue 1, Service Strategy
Selection of Virtualization Technology
Things to Consider
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Virtualization Technology Selection
Virtualization Options:
VMware ESX Full Virtualization
VMware Server (free/hosted virtualization)
Microsoft Server Hyper-V 1.0 Paravirtualization
Microsoft Virtual PC (free/hosted virtualization
Xen (Citrix/Open Source) Paravirtualization
Citrix
Parallels Virtuozzo Containers
To Name a few
Best Practice Issue 1Selection of Virtualization
Technology
Best Practice Issue 1Selection of Virtualization
Technology
Best Practice Issue 1Selection of Virtualization
Technology
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Different software vendors and different software packages have different licensing terms
Read Your License Agreement
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Best Practice Issue 2Service Design Objectives
Systems must be available when needed…
Unplanned outages minimized
Adequate capacity
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Best Practice Issue 2Service Design Considerations
Inherent Advantages
Service Level Management: Improved Uptime
Continuity Management: Quicker recovery from failures
Capacity Management: Easier to add more resources
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Increased complexity…
Continuity Management:Server failure could mean more down systems…
Capacity Management: Possible resource bottlenecks
Service Design ConsiderationsInherent
Disadvantages
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Best Practice Issue 3Service Transition/Change
Management
Easy to build machines
Easy to cheat on licenses
Beware of Empire Builders!
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Virtual Machine Sprawl!
Change Management is Critical!Change Management is Critical!
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Change Management is Critical!Change Management is Critical!
Established change control procedures
Change Advisory Board
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Summary
Virtualization can increase efficient use of resources
ITIL meshes business and technology management
Never Forget: Virtualized data centers exist to provide SERVICES
Summary
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Summary
Service StrategyThere are many options. Select the technology that’s
Right for Your Organization
Service DesignVirtualization is a two edged sword: It can help improve
Capacity, Availability, Continuity or Hinder it
Service TransitionChange Management is CRITICAL
Summary