Shulou(Shulou.com)06/03 Report--

The so-called server virtualization refers to the technology of dividing a physical computer software environment into multiple independent partitions, each of which can simulate a complete computer according to the requirements. As a result, the uncuttable barrier between physical structures is broken, so that users can apply these computer hardware resources in a better way than the original configuration. The new virtual parts of these resources are not limited by the way existing resources are erected, geographically, or physically configured. Why server virtualization? what are the advantages of server virtualization? First of all, reduce operating costs, server virtualization reduces the operating costs of IT infrastructure, IT operators get rid of the heavy management of physical servers, OS, middleware and compatibility, reduce the frequency of manual intervention, and make management more centralized and convenient. Secondly, improve application compatibility. The encapsulation and isolation provided by server virtualization make a large number of applications run independently in various environments, so that IT managers do not need to frequently adjust applications according to the underlying environment, but only need to build an application template and publish it to different types of virtualized platforms. Third, accelerate application deployment by using server virtualization technology, you only need to input activation configuration parameters, copy virtual machines, start virtual machines, and activate virtual machines to complete deployment, realizing large-scale and rapid deployment, greatly shortening deployment time, eliminating human intervention, and reducing deployment costs. Qingguo remembers to deploy a virtual server in less than 30 minutes. Fourth, improve service availability, users can easily back up virtual machines through server virtualization, after dynamic migration of virtual machines, you can easily restore backups, or run backups on other physical machines, which greatly improves the availability of services. Fifth, improve the resource utilization. Through the integration of server virtualization, the utilization of CPU, memory, storage, network and other devices is improved. The traditional deployment utilization of most applications is less than 10%, while the utilization rate after virtualization is often more than 70%. At the same time, ensure the availability of the original service, so that its security and performance are not affected. Sixth, dynamically schedule resources, in server virtualization technology, the data center has changed from a traditional single server to a unified resource pool, and users can immediately adjust virtual machine resources. at the same time, data center managers and data center administrators can flexibly allocate resources to virtual machines according to the internal resource usage of virtual machines. Seventh, reduce energy consumption by reducing the number of physical servers running and reducing the power consumption of units other than CPU, so as to achieve the purpose of energy saving and emission reduction. According to statistics, it is found that each reduction of one server can reduce carbon dioxide emissions by about 4 tons, which is equivalent to reducing 1.5 cars on the road or planting 55 more trees, which is of great significance to environmental protection. In the current situation where all kinds of resources are very tight, especially when the price of server hardware is rising, it can be said that it is very necessary to use server virtualization.

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