What is virtualization and virtual machine?
Virtualization is the "creation of a virtual (rather than actual) version of something, such as a server, a desktop, a storage device, an operating system or network resources". Show
In other words, Virtualization is a technique, which allows to share a single physical instance of a resource or an application among multiple customers and organizations. It does by assigning a logical name to a physical storage and providing a pointer to that physical resource when demanded. What is the concept behind the Virtualization?Creation of a virtual machine over existing operating system and hardware is known as Hardware Virtualization. A Virtual machine provides an environment that is logically separated from the underlying hardware. The machine on which the virtual machine is going to create is known as Host Machine and that virtual machine is referred as a Guest Machine Types of Virtualization:
1) Hardware Virtualization:When the virtual machine software or virtual machine manager (VMM) is directly installed on the hardware system is known as hardware virtualization. The main job of hypervisor is to control and monitoring the processor, memory and other hardware resources. After virtualization of hardware system we can install different operating system on it and run different applications on those OS. Usage: Hardware virtualization is mainly done for the server platforms, because controlling virtual machines is much easier than controlling a physical server. 2) Operating System Virtualization:When the virtual machine software or virtual machine manager (VMM) is installed on the Host operating system instead of directly on the hardware system is known as operating system virtualization. Usage: Operating System Virtualization is mainly used for testing the applications on different platforms of OS. 3) Server Virtualization:When the virtual machine software or virtual machine manager (VMM) is directly installed on the Server system is known as server virtualization. Usage: Server virtualization is done because a single physical server can be divided into multiple servers on the demand basis and for balancing the load. 4) Storage Virtualization:Storage virtualization is the process of grouping the physical storage from multiple network storage devices so that it looks like a single storage device. Storage virtualization is also implemented by using software applications. Usage: Storage virtualization is mainly done for back-up and recovery purposes. How does virtualization work in cloud computing?Virtualization plays a very important role in the cloud computing technology, normally in the cloud computing, users share the data present in the clouds like application etc, but actually with the help of virtualization users shares the Infrastructure. The main usage of Virtualization Technology is to provide the applications with the standard versions to their cloud users, suppose if the next version of that application is released, then cloud provider has to provide the latest version to their cloud users and practically it is possible because it is more expensive. To overcome this problem we use basically virtualization technology, By using virtualization, all severs and the software application which are required by other cloud providers are maintained by the third party people, and the cloud providers has to pay the money on monthly or annual basis. ConclusionMainly Virtualization means, running multiple operating systems on a single machine but sharing all the hardware resources. And it helps us to provide the pool of IT resources so that we can share these IT resources in order get benefits in the business. Virtualization, as the name implies, creates a virtual version of a once-physical item. In a datacenter, the most commonly virtualized items include operating systems, servers, storage devices, or desktops. With virtualization, technologies like applications and operating systems are abstracted away from the hardware or software beneath them. Hardware virtualization involves virtual machines (VMs), which take the place of a “real” computer with a “real” operating system. The Evolution of VirtualizationDecades ago, operating system (OS) virtualization technology was born. In this form, software is used to let hardware run multiple operating systems simultaneously. Started on mainframes, this technology enabled IT administrators to avoid spending too much costly processing power. Beginning in the 1960s, virtualization and virtual machines (VMs) started on just a couple of mainframes, which were large, clunky pieces with time-sharing capabilities. Most notable among these machines was IBM 360/67, which became a staple in the world of mainframes in the 1970s. It wasn’t long before VMs entered the heart of personal computers in the 1980s. But mainstream virtualization adoption didn’t begin until the late ‘80s and early ‘90s. While some VMs like those on IBM’s mainframes are still used today, they’re not nearly as popular, and few companies regard mainframes as a business staple. The first business to make VMs mainstream was Insignia Solutions, who created a SoftPC, an x86-based software emulator. This success inspired more organizations—namely Apple, Nutanix, and later, Citrix—to come out with their own virtualization products. What are Virtual Machines?Virtual machines are an emulation of a computer system. The underlying hardware is copied by a hypervisor to run multiple operating systems. While VMs have been around for 50 years, they are now becoming more popular with the advance of the remote workforce and end-user computing. Some popular virtualization stacks and hypervisors include VMware vSphere with ESXi, Microsoft Windows Server 2016 with Hyper-V, Nutanix Acropolis with AHV, Citrix XenServer, and Oracle VM. What is a Hypervisor?A hypervisor is a software that abstracts and isolates hardware and operating systems into virtual machines with their own memory, storage, CPU power, and network bandwidth. Another key function of hypervisors is isolating the VMs from one another and handles communications between all the VMs. A hypervisor is composed of three parts that work together to model the hardware:
How Does Virtualization Work?One of the main reasons businesses use virtualization technology is server virtualization, which uses a hypervisor to “duplicate” the hardware underneath. In a non-virtualized environment, the guest operating system (OS) normally works in conjunction with the hardware. When virtualized, the OS still runs as if it's on hardware, letting companies enjoy much of the same performance they expect without hardware. Though the hardware performance vs. virtualized performance isn’t always equal, virtualization still works and is preferable since most guest operating systems don’t need complete access to hardware. As a result, businesses can enjoy better flexibility and control and eliminate any dependency on a single piece of hardware. Because of its success with server virtualization, virtualization has spread to other areas of the datacenter, including applications, networks, data, and desktops. The Benefits of VirtualizationPut simply, virtualization solutions streamline your enterprise datacenter. It abstracts away the complexity in deploying and administering a virtualized solution, while providing the flexibility needed in the modern datacenter. Not to mention, virtualization can help create a “greener” IT environment by reducing costs on power, cooling, and hardware. But cost savings aren’t the only advantage of opting for virtualized solutions. Here are more reasons organizations are going virtual:
Types of Virtualization
Why Should Organizations Opt for Virtualization?Organizations hoping to pursue a more cloud-like IT environment will need to set their sights on virtualization first. Virtualizing your datacenter helps you use your server resources far more efficiently. In the past, businesses would have to dedicate one application—such as email—on a single server. In those cases, businesses would either over-accumulate multiple servers to take on their multiple applications, or they’d face a different issue altogether: Resources being underused on an entire server. Either way, this method is costly, space-consuming, and inefficient. Thanks to virtual solutions, IT teams can run multiple applications, workloads, and operating systems on just a single virtual machine, and resources can be added and removed as needed. Virtualization scales easily with businesses. As demands rise and fall, it helps organizations stay on top of their resource utilization and respond faster as changes arise. Is virtualization the same as virtual machine?Virtualization is a collection of software technologies that enable software applications to run on virtual hardware (virtualization via virtual machines and hypervisor) or virtual operating systems (virtualization via containers).
What do you mean by virtualization?Virtualization is technology that lets you create useful IT services using resources that are traditionally bound to hardware. It allows you to use a physical machine's full capacity by distributing its capabilities among many users or environments.
What is virtualization machine?A Virtual Machine (VM) is a compute resource that uses software instead of a physical computer to run programs and deploy apps.
What are virtual machines and virtualization software?In computing, a virtual machine (VM) is the virtualization/emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination.
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