What Is Virtualization?
By admin |1 August 2022
It is undeniable the vital roles of virtualization for many companies nowadays. As a savior of many enteprises, it helps to reduce the cost of software infrastracture and expands virtual working space for enterprise. With virtualization, resource allocation in system becomes more efficient, which are further developed comparing with traditional setup. Our articles today will give a holistic view of technical structure of virtualization and their applications in the IT world.
Table of contents
WHAT IS VIRTUALIZATION?
Virtualization is a technology that utilizes the hardware components of a computer such as processor, memory, storage to be partitioned into different virtual computers or virtual machines. The virtual computer will work independently, on their own operation with one particular purpose. For easier explanation of virtualization, we can look into an example of a business, which operates three servers: web server, email server and internal business management server. If each of these servers works on their own purpose, their real consumed capacity is only one-third of one server’s capacity. This results in the inefficiency in capacity management and unnecessary maintenance costs. It follows that the advent of virtualization will enable one physical server to be divided into two virtual machines, one functions as a web virtual machine and the other works as an email virtual machine. The second physical server can be used for the internal business application. Then, the third physical server can be retired to reduce the maintenance cost for business.
HOW DOES VIRTUALIZATION WORK?
Host Machine: Host machine consists of CPU, RAM, Networking and storage, which provides computing power to virtual machines.
Virtual Machine: Virtual machine is regarded as a computing resource, which has configuration as a computer, capable to run programs or deploy apps. Each of VMs operates on its own operation and separate purpose on the same host machine.
Hypervisor: plays a key role in the function of virtualization. Hypervisor is defined as a software layer, which positions on the top of the computing host and virtualizes all of the functions of the computing host or it can directly attach . Hypervisor will take all of the components of the computer and divide them into smaller parts. This division will enable the creation of multiple virtual servers on top of the host, called Virtual Server Infrastructure (VSI) or Virtual Machines (VMs). There are two types of hypervisor:
Bare Metal: It is directly attached to the hardware and each VMs runs on its own operating system. This hypervisor type is popular on markets such as: Oracle VM, VMware ESX and ESXi.
Hosted hypervisor: It runs on the operating system of the host machine. This hypervisor type is frequently applied for the machines running multiple VMs
Types of virtualization
Server virtualization: Server virtualization utilizes a hypervisor to divide the physical servers into multiple smaller virtual parts so that it can participate in the configuration of virtual machines. The virtual server will have full function as the physical server and helps to reduce a lot of cost and hardware devices.
Storage virtualization: is created by aggregation of different physical storage devices into one virtual storage controlled by a central console. To virtualize the storage, it requires a virtual software which is able to identify the available capacity of each physical storage before unifying them into one single virtual storage. Storage virtualization helps to cut down a significant management cost, physical hardware in an IT environment and utilize the storage more efficiently.
Data virtualization:is regarded as data management. The access to data from the application is conducted easily without requiring any knowledge of where the data is physically located or how it is formatted. Data virtualization allows users to view, access and analyze datasets from a single access point without concerning specific data location.
Application virtualization: It allows users to run the app from a separate computer regardless the standard operating system is on another computer. In this situation, the app is deceived to “think” that it operates on their real system but in fact, it is the virtual one.
Desktop virtualization: It simulates the virtual user workstation in which users can access the desktop of the main server from different devices and work remotely with the abstracted desktop. Nowadays, with the popularity of remote and hybrid working styles, desktop virtualization gets more attention and applied widely in many enterprises.
Benefits of virtualization to companies
So what benefits of virtualization that companies can obtain from this technology. Thanks to the advent of virtualization, most companies eco-friendly workspace environments utilize this technology not only to save a huge amount of maintenance cost but also reduce the demand of hardwares, optimize working space and save a lot of power. One of the outstanding benefits of virtualization is allowing the end-user’s machine even with low capacity to still be able to operate virtual platforms with advanced features in the smooth way.
The second benefit of virtualization is to increase uptime, which enables end-users to switch from this server to another one in the case of the interruption caused by blackouts or internet disconnection. It ensures the smooth working continuity for users at another time from another computer. Otherwises, virtualization also helps to reduce the loss of data when the hardware or machine is broken because all of the information and data was saved and protected on the virtual machine.
Last but not least, virtualization lessens the physical machine demands from testing. Applications running on virtual machines behave like they are operated on their own physical machine. This characteristic is regarded as superior for testing applications because by only using one single computer, testers can test their application under many different virtual platforms without any demand for hardwares installment. Besco Software currently also carries out a project relating to the application of virtual testing on firmware devices. To know more about virtual testing or virtualization, our experts in this field are willing to offer free consultancy for your businesses about the application of virtual testing on firmware devices. Our team is ready to help. Contact us today !