Virtual Servers & Storage

Virtualization
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What is Server Virtualization?

A virtual machine (VM) is segmented by software to act as a standalone machine. Several virtual machines reside on one physical server.

Instead of one Operating System (OS) partition, a server running VM technology can have multiple "virtual" OS partitions on one physical machine. This technology, known as "virtualization," can save you time and money. Several virtual machines can run for the power costs of one physical machine. Additionally, if a physical server fails, we use Vmotion technology to seamlessly move the virtual machine to another physical server without service interruption.

What applications are well-suited to run on VMs?

  • Web servers
  • Servers with no need for special hardware such as USB or PCI devices
  • Servers with a light to normal load amount
  • Servers not requiring multiple computer resources, such as hard drive I/O, network I/O, memory, and CPU

Advantages of virtualization

  • Server consolidation: If applications running on separate computers do not utilize the computing resources of their computers, they can be consolidated onto a smaller number of servers using virtualization technology. UNL can boost hardware utilization.
  • Smaller footprint: Virtualizing servers decreases the number of physical boxes that a UNL must use. This means a smaller datacenter, with the resulting decreases in cooling and electrical costs.
  • Hardware costs: Because virtualization allows for greater utilization of existing resources, fewer physical servers are required, saving money both on upfront hardware costs and and on maintenance costs.
  • Flexibility and agility: Virtualization allows for the quick creation of different operating system environments, it is easy to run legacy applications alongside new versions, migrate applications to new environments, and restore systems in post-disaster scenarios.
  • Ease of Testing and Development: Virtualization speeds up the development and testing process because it makes it easier to create different operating system environments. Virtualization allows designers to compare application performance across different operating environments, as well testing out applications in virtual environments (which therefore avoids destabilizing the system that users are currently using).

Quick Links

If you would like to suggest changes to this service, have questions about the service, or would like to comment on the level of support you are receiving, please contact the Support Team at unlvirtual@unl.edu.