Virtualization

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IOS110

• Virtualization

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Agenda

• What is Virtualization?
• Types of Virtualization.
• Advantages and Disadvantages.
• Virtualization software Hyper-V

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What is Virtualization?

• Virtualization
• Refers to technologies designed to provide a
  layer of abstraction between Information systems
  hardware and the software running on them.
• It provides a logical view of resources, rather
  than a physical view,
• Virtualization solutions make it possible to do a
  couple of very useful things
• It allows you to increase the flexibility of how
  IT resources are deployed.
• It allows IT end user to consume IT resources
  without being tied to the limitation of a
  physical environment.

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Types Of Virtualization

• Computer Virtualization turns a single computer
  into two or more virtual computing platforms
• Server virtualization
• Running multiple server/workstation operating
  systems on a single server computer
• Workstation (PC) virtualization
• Running multiple workstation/server operating
  systems
• Application virtualization
• Running single application in their own virtual
  machine
• On a windows systems this mean that the file has
  its own files system and registry.

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Types Of Virtualization

• Storage virtualization
• Setting up multiple network disk storage units to
  appear as one unit.
• Hardware or CPU virtualization
• Using the CPU to perform virtualization tasks by
  having virtualization processes work inside a
  specially design CPU. AMD Virtualization (AMD-V)
  Technology and Intel Virtualization Technology
  (Intel-VT).
• Network Virtualization
• Dividing a single network into multiple channels
  or bandwidth so that the network appears as
  multiple network

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Computer Virtualization

• For our purposes - One physical machine to
  support multiple virtual machines that run in
  parallel. Reduce costs by consolidating services
  onto the fewest number of physical machines

http//www.vmware.com/img/serverconsolidation.jpg
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Core Technology

• The Hypervisor
• A computing layer which allows multiple operating
  systems to run on a host computer at the same
  time.
• Originally developed in the 1970s as part of the
  IBM S/360

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Current Virtualization Software

• Microsoft Virtual PC
• Microsoft Hyper-V
• VMWare Vsphere (Market leader)
• Oracle VM VirtualBox
• Linux KVM
• XEN

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The Hypervisor

• The role of the Hypervisor in supporting Guest
  Operating Systems on a single machine

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The Hypervisor
Windows
http//publib.boulder.ibm.com/infocenter/eserver/v
1r2/topic/eicaz/eicaz508.gif
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Advantages Of Virtualization

• Enables server consolidation
• Uses hardware effectively
• Provides hardware independence
• Enables using different operating systems on one
  computer
• Provides effective development environments
• Offers business advantages

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Disadvantages Of Virtualization

• Single point of failure for multiple computing
  environments
• Backups can be slow
• Not all physical workload and systems can be
  Virtualized
• Not all applications can work in virtualized
  environment

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Hyper-V

• Features
• Requirements
• Installing
• Using Hyper-V Manager

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Features of Hyper-V

• Allows 32 bit and 64 bit OS to be installed
• Use of its Virtual Switch capability to perform
  network load balancing thus sharing the load
  equally among virtual servers
• Scalable with the option to scale up to larger
  and faster hardware at any time
• Ability to take advantage of AMD-V and Intel VT
  CPU hardware virtualization technology
• The ability to create snap shots of various
  virtual computer states

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Requirements of Hyper-V

• Same basic hardware requirements of 64bit Server
  2008R2
• X64-based computer
• DEP (Data Execution Prevention) enabled (monitors
  how programs use memory and stop programs that
  attempt to use memory allocated to for system
  program and process).
• A processor with AMD-V or Intel VT (hardware
  virtualization)
• A clean installation of Server 2008R2

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Installing Hyper-V
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Installing Hyper-V
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Installing Hyper-V
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Using Hyper-V Manager

• Install virtual machines
• Configure virtual machines
• Install guest operating systems
• Manage virtual machines, including starting and
  stopping
• Manage network communications through virtual
  machines
• Troubleshoot virtual machines