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Virtualization of Servers

Computing is getting more and more advanced as we move towards a fully technology-driven world. We know the power of better server management and the advantages it can provide to businesses of all size. But what happens when your business has to run or manage more than one server? Expenses increase dramatically as hardware costs increase and management of additional servers also cost extra. That is where businesses fail to discover the strength of virtualization. What if we tell you that there is a cost-effective and economically reasonable approach to this problem? Yes, you may feel that you are not staying up to date on technology, but in this article, you will learn what virtualization of servers is and how it is a cost-effective alternative to buying additional hardware for managing multiple servers.

Paul Venezia, in a PCWorldarticle “If there's one technology that can greatly improve computing environments of any size, it's virtualization.” Virtualization of servers is apportioning of a primary physical server (the host) into multiple virtual servers (the guests) in order to cut down expenses and optimize server resources. It enables you to run multiple virtual servers from a single physical server because you don’t need to buy more hardware or physical servers to run two, three or a thousand additional servers.

The primary physical server runs a software-based application that administrates all the virtual servers created on that server. All files can be stored on that primary server which reduces additional cost of management, hardware, and storage and physical space. As the number of physical servers is lessened, the requirement of power and cooling systems is also reduced which directly aids in cutting down business expenses.

Benefits of Virtualization for Your Business

If your business has to run only one server than virtualization is of no use for you, but if your business has to manage more than one server, then the benefits of server virtualization are remarkable. Server virtualization gives the opportunity to eradicate any kind of server collapse or downtime as it is an autonomous system that is managed and administrated by a single host.

Also virtualization enables you unify server administration and management to only one single centralized point which allows you to consume your server resources efficiently while improving availability of the server. Virtualization can be used in testing and development as well as in supporting disaster recovery. If you use virtualization, you don’t have to buy new hardware or system in order to implement a new business application thus your costs are reduced exponentially and this counts as the most effective advantage of virtualization.

Different Methods of Virtualizing a Server

Now we know that virtualization of servers is the best and most steadfast way of managing multiple servers from one primary server. This practice of virtualizing servers can be accomplished with three prevalent approaches, which are mentioned on this page

This approach utilizes a hypervisor to direct instructions to the central processing unit. The virtual machines are centered on the host/guest pattern and the guest operating system runs without any variations. Guest servers are not aware of each other or the host’s operating system knowledge or usage of hardware resources. This approach allows guests running different OS.

The para-virtual machine model is also based on the host/guest prototype. This model is slightly similar to the full virtualization as it also uses a hypervisor but in this model the guest servers are mindful of each other thus the power and administration efforts are reduced.

The OS level virtualization is totally different as it doesn’t use a hypervisor and is also not based on the host/guest archetype. Although the biggest limitation of this model is that all guests have to run the same operating system as the host.