
Server virtualization is the process of using software to create Virtual Machines or VMs that are hosted within a physical server called a Virtual Host. These VMs imitate physical servers, but they are distinct operating system (OS) environments that are managed by the Virtual Host. In a nutshell, it is a method of IT simplification, consolidating the number of underutilized physical servers into a few machines that are used to their full capacity.
For a concrete example, think of all the Microsoft applications you might currently have on-premise and the specific workloads that they each encapsulate: Exchange for email, Lync for unified communications, SharePoint for document sharing. That is three applications, each with its own instance of Windows Server, likely housed on three individual computers that you are paying for to own and operate. Server virtualization could consolidate these three applications onto a single computer; each virtualized separately from one another.
While the early adopters of server virtualization were numbered and tended to be larger enterprises using the solution for non mission-critical applications, things are really beginning to change: server virtualization is on the rise and what’s more mission-critical applications are now being incorporated into the service. According to Veeam– a virtualization management software firm –over a third of all enterprise servers or 39.4% are now virtualized. This statistic hails from Veeam’s inaugural virtualization penetration index or V-index which the company recently launched and plans to update quarterly. The V-index also discovered that the most popular virtualization software to date is provided by VMware followed by Microsoft Hyper-V and Citrix Xen (with 84%, 61% and 55.4% of the enterprises polled utilizing these providers respectively).
The increase in server virtualization might come as a surprise to those of us working in the realm of small business, but according to Tom Bittman, Vice President Distinguished Analyst with Gartner Research, this upward bound trend was inevitable: for businesses of all size. Bittman cites the availability of free hypervisors or VM managers (Microsoft bundles Hyper-V with Windows Server 2008 and VMware offers an entry-level version of vSphere) and total lowered overhead as the two main reasons why virtualization adoption will continue to climb, especially among small-and midsized businesses (SMBs). Bittman also went on to say that although most people initially believe that the sole benefit of virtualization is cost reduction, he says that people soon realize it is not just the savings that make server virtualization so compelling, but the agility and accessibility of the service.
Benefits
There are many benefits to making the switch to server virtualization, especially if you are an SMB with budgetary concerns and time constraints.
1. Cost reduction
Server virtualization will help you to lower the total overhead of your SMB by cutting back on the number of physical servers you need to maintain, space usage, workforce and energy.
2. IT simplification
Server virtualization consolidates multiple underutilized servers into a single host (or a few hosts) that run VMs. This reduces infrastructure, simplifies maintenance and frees up your IT team.
3. Increased agility
With server virtualization, operating systems can be moved from one VM to another easily and quickly, without any experienced interruption of service. This increases the accessibility of your workloads as well as total system uptime.
Fears and perceived obstacles
Veeam’s V-index polled enterprises on fears and perceived obstacles in the way of their adoption of server virtualization. The results were as follows:
1. Reliability
38.8% stated that reliability was their greatest fear regarding the switch to virtualization.
2. Hardware refresh
37% stated that they needed to wait for a hardware refresh before deployment.
3. Application performance
32.4% stated that they harbor uncertainty over application performance.
4. Backup and restoration
32.4% stated that they were worried about the efficiency of virtualized backup and restoration.
5. Managing the virtual estate
30.8% stated that they have concerns regarding successful management of the virtual estate.
Conclusion
Server virtualization definitely seems to have its pros and cons, but the ultimate distinction between said pros and cons that is sure to tip the scale in favor of adoption is the fact that these cons are merely perceptions and fears while the pros are proven fact. Microsoft for example guarantees total cost reduction as well as greater accessibility of all applications if your SMB makes the switch to server virtualization with their Windows Server 2008 R2 coupled with their Hyper-V hypervisor.
If you would like to learn more about server virtualization or have any questions regarding adoption in your business, please contact Bryley today at 978.562.6077 or email Sales@Bryley.com
References
1. Over a third of enterprise servers virtual, claims virtualization penetration index; Warwick Ashford; ComputerWeekly.com; http://www.computerweekly.com/Articles/2011/07/18/247308/Over-a-third-of-enterprise-servers-virtual-claims-virtualization-penetration.htm
2. VMware ESXi Hypervisor Now Free; VMware News Releases; http://www.vmware.com/company/news/releases/esxi_pricing.html
3. Windows Server 2008 R2 Hyper-V Benefits to the SMB; whitepaper taken from the Microsoft Virtualization homepage http://www.microsoft.com/virtualization/en/us/products-server.aspx