Server virtualization is the procedure of splitting a physical server into multiple virtualized servers using a software program. Each virtualized server is able to operate autonomously, independently of any other virtual server on the physical server. The major advantage of Server Virtualization is that it can help reduce the cost of hardware and software while maintaining high levels of functionality. This type of virtualization also allows for the creation of very large pools of resources for use in applications.
Virtualization works well for virtual private LANs (VPLS) where multiple private and central computers are running on different operating systems. In essence each VPLS is able to function like a dedicated physical server without all the maintenance, support and resources of a traditional physical server. However, Virtualization does have some drawbacks as well. They can reduce the level of performance relative to a single physical server and they tend to use more bandwidth than do traditional methods of server virtualization. Some VPLS installations will not be able to function if one physical server fails, or if the physical server goes down due to unexpected reasons.
One of the key benefits of Server Virtualization is its cost savings over the long term. Virtual Private LANs can provide large cost savings when compared with the costs of running, maintaining, and deploying multiple physical infrastructure for an enterprise. This method of server virtualization enables businesses to reduce their investments in hardware and software by pre-installing and pre-configuring virtual operating system software, which eliminates the need for purchasing new hardware, and the associated software licenses. VPLS can also provide cost savings through consolidation of virtualization technologies, which can result in greater overall cost savings.
Server virtualization can also eliminate server downtime caused by a failure in one main component. This can lead to a reduction in the costs incurred for that component. This allows businesses to increase their capacity at a lower cost than would be achieved through the deployment of expensive new servers and processors. For example, it can often be less expensive to purchase a processor with a higher multiplier than one with a lower multiplier. By allowing a company administrator to create different configurations of servers based on criteria such as server type and workload, physical proximity to the data center, and capacity, server virtualization provides a way to make more efficient use of existing resources. This also reduces the downtime that a company experiences, which leads to improved customer satisfaction.
Disaster recovery is another benefit of virtual machines that can be incorporated into the deployment of VPLS. Virtual private LANs allow for the automatic installation of necessary components to mitigate the risk of damage due to a failure in the physical infrastructure. They also provide the capability of managing the virtual machines across multiple network interfaces, while simplifying the administration of servers and programs. The ease of management and support for VPLS makes it a cost-effective solution for disaster recovery.
The potential savings that VPLS can realize for a company often makes it the choice of many companies looking to reduce costs and improve operational efficiency. In addition to saving money through the avoidance of purchasing new server hardware, businesses also experience many benefits through server virtualization. Businesses can eliminate the need for purchasing expensive or outdated physical hardware and can simplify the management process by allowing IT managers to create separate, customized virtual machines for each physical server. In addition, businesses that utilize VPLS can better control and protect their applications, saving money and time during the recovery process.