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  • Virtualization: What does it mean and how can I use it! Clark Roberts David Gerstenecker Chris Clausen John Arends
  • Virtualization
    • Virtualization is a logical process
      • Many processes can be virtualized
      • 1. PC Virtualization – running multiple logical virtual machines on one piece of hardware
      • 2. Desktop Virtualization – providing the end user the entire desktop experience from a central server
      • 3. Server Virtualization – running multiple logical virtual machines on one physical server
  • Virtualizing a PC using Virtual PC 2007(SP1)
    • New features
      • Vista support (guest and host)
      • 64bit support
      • Hardware assisted virtualization (support of VT technology)
      • Run virtual machines on multiple monitors
    • Benefits
      • Great Beta environment
      • Easy to run multiple versions of Windows
    • Disadvantages
      • No real Linux support
      • “ slow” without VT hardware present
  • Have your cake and eat it too… PC virtualization
  • why?
      • Run Outlook on Mac or Linux
      • Play with ___ OS without dedicated hardware
      • Evaluate software without leaving footprint
      • Support Vista without giving up XP
      • Use x64 host without giving up x32 only apps
      • Many other reasons that don’t fit on this slide
  • dgersten’s virtual world
    • Virtual Machines:
      • Primary: WinXP, 2 CPUs, 2 GB
      • Previous: WinXP, 1 CPU, 1 GB
      • Testing: Vista, 1 CPU, 2 GB
    • (Exchange testing)
      • CAS: Win2003, 1 CPU, 512 MB
      • Mailbox: Win2003, 1 CPU, 512 MB
  • options for intel mac
      • VMware Fusion ($37.50 @ WebStore)
      • Parallels Desktop ($40 @ WebStore)
      • Others (audience participation)
      • VMware Server (free) (version 1 is viable desktop product)
      • VMware workstation ($96.99 at
      • Parallels Workstation ($49.99 at
      • Others (audience participation)
    options for windows & linux
  • evaluation criteria
      • Multiple snapshots
      • Multiple monitor support
      • Multiple virtual network support
      • Interface to guest VM (app vs. Web)
      • Interface to guest apps (Unity/Coherence)
      • Interoperability with other programs
  • gotchas
    • IP address usage
    • SID duplication on copy
    • Licensing guest OS
    • Performance “hit”
    • Getting lost
    • Out of date on updates for turned off/suspended machines
  • useful tools
    • Fusion scripts to manage virtual networks:
      • Tokamak (by DaveP on
    • Microsoft’s Sysinternals’ NewSID utility
    • VMware’s DiskMount utility (Win & Linux)
  • fine print The previous segment of this presentation was developed in PowerPoint via Fusion’s Unity mode on a MacPro.
  • Desktop Virtualization Christopher D. Clausen
  • Desktop Virtualization
    • Remote session based
    • Microsoft Terminal Services -
    • VNC or (Free)NX for UNIX, Linux, Mac OS
  • clients
    • Mstsc – Remote Desktop connection client
    • VNC, (Free)NX
    • Diskless workstation –
    • Thin Client dedicated hardware
  • Server Virtualization
  • What is server virtualization?
    • A physical server is divided into a number of virtual servers with each running its own operating system
    • Each virtual machine has its own virtual processor, memory, storage, networking, etc
  • Pros
    • Fewer physical servers which means
      • Less datacenter space is needed
      • Less power (and fewer electrical outlets, power strips, UPSes, etc) (Think Green)
      • Fewer KVM heads, etc
  • Cons
    • Watch for ‘server sprawl’
    • You still have to patch every VM
    • Adds complexity
    • “ All your eggs in one basket”
    • Cost
  • ACES ITCS implementation
    • Started with the free VMware Server product on Linux and Windows hosts
    • Used mostly for testing, and for some new low volume services
    • Performance was good
  • VMware Server
    • Patching the hosts was a problem because a host reboot meant many virtual servers went down
    • VMware server 1.0 has some security issues with hosts on the AD and remote console (Addressed in 2.0 beta)
  • VMware Virtual Infrastructure
    • Decided to move to the next level
    • More complex and substantial cost
    • Includes important features such as Vmotion
  • Virtual Infrastructure
    • 4 hosts total, 2 in each building
      • 16 gigs of RAM
      • Dual, dual core processes
    • Hosts run VMware ESX Server as a dedicated OS
    • VirtualCenter for management
  • VirtualCenter
    • VirtualCenter runs on a Windows machine
    • Integrates with AD
    • You connect using the VI client on Windows 32 bit
    • No client for Linux or Mac OS X
  • Vmotion
    • Probably the greatest thing so far
    • Seamlessly move a VM between two ESX hosts with *no* downtime
    • Requires the 2 hosts be on the same SAN
  • Results so far
    • We have 14 machines virtualized between the 4 hosts and very few resources are being used
    • We plan to virtualize many more machines over the next year
  • Important things we learned
    • Check the VMware HCL carefully
    • Need a lot of NICs – we did 6 per server
    • Some instability with older Linux kernels in VMs but easily resolved with updates
  • Server Virtualization with Hyper-V
    • Microsoft’s competitor to VMware ESX and Xen Hypervisor
    • Features (Windows Server 2008 64 bit only)
      • 16 virtual CPU’s per VM
      • 64 GB Ram per VM (2TB per host)
      • 8 virtual network connections
      • 16 node clustering (high availability)
      • VSS support (volume shadow service) for live backup
    • Not support by present version of System Center Virtual Machine Manager
    • MSDN and TechNet are running on Hyper-V RC0 today
  • Questions???