What is server virtualization

Principle

Server virtualization is the act of creating multiple virtual servers on a physical server. These created servers then run on the same physical machine, while having the same properties as if they each had a physical machine. The purpose of this manipulation is to optimize the performance of a physical server while allowing the company to make savings in investment in physical infrastructure.

virtual os software, virtual infrastructure, virtual security, vmware, san virtualization
What is server virtualization

Reasons for virtualization:
One can rightly ask why to use a single physical machine to simulate several, since we use, in a traditional design, single hardware for a single operating system. Moreover, the fact of using virtualization on the same physical server will not push it to its limits by consuming all its resources? But first, let's talk about the facts: it turned out that in many companies, it is common to find servers used on average at 15% of their capacity, even if the power reserve is necessary in case Irregular charging ... The consequences for a company are a costly investment, and heavy maintenance, all for performance far from optimal. Besides, we can also see that a server running at 15% of its capacity is no less energy intensive than a server using its full potential. Thus, it does not seem absurd to want to group several machines on a single physical server, if we are sure that the load peaks of each server are not synchronous, although the virtualization itself is a part of the charges.

The benefits of virtualization:


As said before, one of the biggest advantages of virtualization is that you can run multiple OSs on the same physical environment, and thus use a given server at 90% of the CPU and memory capacity rather than the 15% usual. Investments for the purchase and renewal of physical equipment will be significantly reduced.

In addition, the benefits in terms of savings and efficiencies are not negligible! Although often underestimated, server power and air conditioning costs will be significantly reduced if you only need to power one server instead of three or four.

The speed of deployment of a server is very fast thanks to virtualization. Indeed, traditionally, during the deployment and installation of new servers, it is necessary to wait for the delivery times of the servers, the licenses, then deploy the applications while ensuring the various updates. But thanks to server virtualization, it is possible to create virtual server models extremely quickly once the physical server is set up.

As far as server monitoring is concerned, rather than using specific monitoring software for each server, only one software can do this job since there is only one physical server. This is a cost advantage since these tools are often expensive.

The portability of virtual servers is also a major advantage since they are only considered by the physical server as a suite of files. Thus, these virtual servers can be copied to external disk and reassembled on another physical server. The restoration of these servers is then simplified in case of problems.

A function of server virtualization is to be able to snapshot a virtual server, which can be very useful during a critical update or during development tests. This "snapshot" is used to reinstall the server configuration without altering it in case of problems.

Another benefit of server virtualization is high availability. This involves setting up a second physical server and redundancy with the first one to form a cluster. Thus, if the first physical server encounters a problem, the virtual machines will automatically be copied to the second physical server, which will ensure the users a very high availability.


virtual os software, virtual infrastructure, virtual security, vmware, san virtualization
What is server virtualization

Conclusion:

Virtualization of servers and workstations is becoming more fashionable. Due to the stability of the products available as well as the benefits of this technology, virtualization has become very profitable as soon as there are more than two servers to administer. In addition, Microsoft's highly competitive offerings mean that this technology is now very affordable for all SMBs. Thank you for reading this article, hoping that it can be useful to you.


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