Server Virtualization Gina Myers. Definition Creating virtual machines (VMs) “VMs are software entities that emulate a real machine’s functionality” ◦

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Presentation transcript:

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 Not all can be classified as purely type 1 or 2

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

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

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

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

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

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

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

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

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

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

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