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Server Virtualization

Server Virtualization. Gina Myers. Definition. Creating virtual machines (VMs) “VMs are software entities that emulate a real machine’s functionality ” Carbone, Lee, and Zamboni. Hypervisors. Virtual machine manager Two types 1 Run on hardware 2 Run on operating system

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Server Virtualization

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  1. Server Virtualization Gina Myers

  2. Definition • Creating virtual machines (VMs) • “VMs are software entities that emulate a real machine’s functionality” • Carbone, Lee, and Zamboni

  3. Hypervisors • Virtual machine manager • Two types • 1 • Run on hardware • 2 • Run on operating system • Not all can be classified as purely type 1 or 2

  4. Full Virtualization • Better security • Guest OS is not aware it is being virtualized • Performance is slower • Simplifies migration and portability

  5. Paravirtualization • Most common approach • When the VM is aware that it is a VM • Improves performance • Better sharing of resources • Hyper-V, VMWare ESX

  6. Vendors • “We certainly see the three-player market of Microsoft, Xen, and VMWare; Xen for Linux or open source markets, Microsoft for Windows, and VMWare as Switzerland-able to do anything on any architecture” -Goth

  7. Citrix XenServer • Free and licensed editions • Low cost • Free version has a lot of benefits • Mostly used with Linux, support for Microsoft

  8. VMWare • Most popular • Many different products • Solutions for many operating systems • Virtual appliance marketplace

  9. Microsoft Hyper-V • Free with Windows server 2008 and R2 • Offers live migration of VMs • Integration with other Microsoft products

  10. Benefits of Virtualization • Better utilization of existing hardware • Energy savings • Cost savings • Conversion of legacy systems to VMs • Live migration, less downtime • Reduce carbon footprint

  11. Issues with Virtualization • Security • If hypervisor is hijacked, the hijacker could gain access to both the physical server and the VMs • Security measures that are already in place on physical server might not be enough to protect VMs • Virtualization adds another layer of complexity

  12. Auxiliary Information Technology of Indiana University • Microsoft Hyper-V • Reduced servers from 150 to 32 • Annually cost savings of $85,000 • Less downtime • Server provisioning time reduced from 1 month to 1 hour

  13. Frederick Memorial Healthcare System • VMWare’s Infrastructure 3 • Converted legacy systems to VMs • Reduced servers from 85 to 6 • Reduced data center footprint by 30% • Reduced energy consumption by 35% • $40,000 saved annually

  14. Future • Virtualization on cell phones • To separate a work phone and a home phone on one physical device • “BYOC” Citrix’s bring your own computer “the laptop runs a corporate virtual machine directly on top of a hypervisor rather than in a hosted virtual environment contained by the employee’s personal operating system” -Kroeker

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