A virtual server is defined as a web server that shares its resources with other virtual servers and is not a dedicated server. With virtual servers, the entire computer is not dedicated to running the software but is divided into two or more virtual machines.
Many virtual servers can co-reside on the same computer without affecting its performance, but this depends on the workload. Virtual machines can be sold as a service and its cost less than a physical server, although it works like a dedicated physical server.
Virtual servers are much easier to set up and configure than a dedicated server, and performance may be less or equal to the workload of other instances on the same hardware.
Use of Virtual Servers:
The use of virtualization is gaining importance in the world of technology as people begin to see how it can work more efficiently to reduce the overall costs of processing power and IT.
The concept of virtualization and the use of virtual servers may be unfamiliar to those accustomed to traditional infrastructure.
Virtualization is basically a way to run the multiple applications and operating systems on the same server in order to take full advantage of its processing power.
Virtualization makes infrastructure easier and more efficient, allowing applications to be faster and increase efficiency and availability. Virtual servers are appealing because they can create IT that is easy to manage, faster resources control and cost effective.
What is Server Virtualization?
Server Virtualization is using virtualization software to distribute the server so that it works like multiple virtual servers. Then each virtual server can run its own operating system, and can be used as needed. That way, the server as a whole can be optimized and used in a number of ways, instead of being dedicated to just one task or application.
Types of Server Virtualization:
There are basically three types of server virtualization that are commonly used to divide a physical server into different virtual servers.
Shares all kinds of common features and uses the physical server as the guest virtual server. All three systems use different approaches to allocate physical server resources for virtual server needs.
Complete virtualization is the first type of server virtualization, which uses a hypersensitive as a special type of software to allocate resources. Hypervisor software interacts directly with the physical server and acts as a platform for each virtual server’s operating system.
Hypervisor software keeps each virtual machine unaware of other virtual servers running on the physical machine. Each guest server runs its own operating system while Hypervisor monitors the physical server’s resources and connects those resources to the appropriate virtual server. Some processing power of the physical server should be specific to the needs of hypervisors’.
The second type of virtualization uses a separate approach called para-virtualization. Through this method, the virtual server and the guests are introduced to each other, in contrast to the whole point of virtualization. The hypervisor does not need as much processing power to manage virtual servers as it does under full virtualization, which can help prevent performance from slowing down.
Hypervisor does not play such a big role because every operating system is already aware of the demands that other operating systems are putting on the server.
This allows the entire system to work as a unit and monitor what resources are available for each virtual server.
3.Operating System Virtualization:
The third type of virtualization option to use is the operating system level virtualization, which uses different architecture than two others. Operating system level virtualization also does not use a hypervisor because the virtualization capability is part of the host operating system that performs such functions as a fully virtualized hypervisor.
This method has some limitations, although all virtual servers or guests run on the same operating system. Virtual servers are independent of each other, but users are not able to match and mix the operating systems with other.
This is because the environment is known as the same because all operating systems are the same. The type of virtualization that will work best depends on the needs of the network administrator.
Advantages of using virtual servers:
Now that you know the definition of virtual servers, here are some of the benefits of using them.
- The cost of managing and maintaining a virtual servers are very lower than a physical servers. The ability to run the multiple applications and OS on a single physical machine reduces costs because it consumes less energy, hardware, and space.
- Server virtualization enhances system management because the virtual server environment can be managed with fewer machines, administrators, and hardware.
- With the help of virtual servers, it is very easy to transfer applications and OS from one physical machine to another in a virtual machine. This ensures high reliability and availability of services.
- Virtual servers are also very easy to debug and test applications in different OS. With the help of multiple virtual machines, you can easily debug, install and run applications in different systems manually.
I conclude that Virtual servers define as a web server that shares the computer resources like hardware, software, and operating system with virtual servers. With virtual servers, the whole computer is not dedicated to running the server software but is divided into two or more virtual machines.