In a business environment where IT managers are constantly being asked to do more with less, server virtualization represents an easy way to maximize your existing resources. Although server virtualization has gained popularity in recent years, there’s still some confusion about how it works, what the benefits are and how to get started.
Let’s take a look at some of the best ways to implement server virtualization in a small or medium sized business environment.
What Is Server Virtualization?
Server virtualization is a process when a physical server is segmented into a number of self-contained units, similar to how a hard drive can be partitioned. This allows multiple users to run applications from the same machine while allowing for complete autonomy over network settings. In a business environment, server virtualization allows IT managers to consolidate space, providing more efficient use of limited resources.
Practically speaking, there are three levels of server virtualization:
- Full virtualization uses hypervisor software to keep each virtual server running completely independently. Virtual servers aren’t aware of each other and can run different OS platforms, if required.
- With para-virtualization, virtual servers are aware of one another and work together to minimize processor demands.
- Virtualization can also be done at the OS level. Using this approach, virtual servers remain independent of each other, but must be running the same OS.
Server Virtualization Best Practices
- Choose a hypervisor wisely. Several hypervisors are currently available on the market, and each one is different. For example, not all hypervisors support para-virtualization. Fully assess your virtualization needs before making a costly decision. Also remember that OS-level virtualization can usually be done using your native software.
- Revisit your security needs. Because they can be easily cloned and have the ability to undo system changes, virtual servers prevent a greater risk than hardware devices. Make patching, management and log data collection a top priority.
- Centralize storage by consolidating physical servers. To get the maximum benefit from virtualization, eliminate as many unnecessary devices as you can.
- Have a data backup plan in place. Make sure your important data and applications will continue to receive adequate protection when you move to a virtualized environment.
- Check regulatory requirements, such as HIPAA and ISO, to ensure compliance will not be compromised.
While the specifics of your network environment may require a customized approach to virtualization deployment, all of the above tips stress the importance of proper planning early on in the process. Being aware of your needs can help you make the right choices when purchasing software and equipment, so you can maximize uptime when making the transition.
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