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Virtual Computing

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Virtual Computing: How is it Used? What are the benefits?

Virtual Computing: What is it? What are the Benefits?
Introduction
Partitioning or dividing the resources of a single server into multiple segregated VMs is virtualization. Virtual computing allows organizations to save technical resources and money. There are various virtual computing applications which are useful to organizations. The benefits of virtual computing are achieving faster system speeds, eliminating upfront capital costs, managing corporate desktops in an efficient way and allowing reduction in power costs.
Main
VMs were originally in use by IBM around 1960 and were intended to leverage investments in pricy mainframe computers. “Virtualization, or technology that allows one physical PC or server to act like many separate computers, is just one of many strains on traditional software licensing. In the old days, things were simple: Each program ran once on a computer that had a single user and a single processor. Now, it is not uncommon for a program or operating system to be running multiple times on the same piece of hardware, which may be powered by multiple processors, or a single chip with multiple processing cores.” (Fried, 2006) With virtual computing allows users remote access to software applications and processes whenever it is needed. Access is gained through the internet, wireless network or network server. Through virtual computing providers, users can download and use more than one operating system and perform a multitude of functions at the same time through a single mouse click and receive all the benefits of additional programs and hardware without having to purchase or install them on their own computer. Virtual computing initially began as a method of borrowing space or storage for computer systems, but it's since grown significantly, offering data and software applications, as well as operating and utility systems. “Utility computing describes a business model for on-demand delivery of computing power; consumers pay providers based on usage (“pay as-you-go”), similar to the way in which we currently obtain services from traditional public utility services such as water, electricity, gas, and telephony (Voorsluys, Broberg, & Buyya, 2011).” Virtual computing offers increased storage space, more software applications, performance and troubleshooting solutions, as well as data backup. At the same time, professors can build customized software images in minutes for students to access anywhere. Virtual computing makes one computer act and performs like many computers. A single computer can act like an entire network because of the ability to select only what you need when you need it. Saving back up data and text documents to a virtual server frees up space and those resources can be allocated elsewhere allowing for computers to operate at optimal speeds. This remote-access system lets users choose the software they need, which take more memory than they have on their own systems. For a fee, users can boost their computers' capabilities, size, performance, processes and/or software applications whenever they need it. Applications run remotely and users log into the Internet to perform work through a virtual computer. The corporate environment most commonly uses virtual computing to allow multiple applications on several servers. Business professionals can check e-mail on the road, online classes are taught and managers can keep up with documents stored on internal servers from anywhere in the world.
The clear identification of the demand and the supply side as led to the emergence of virtual computing as a unique discipline in the field of information and communication technology. Cloud computing is an extension of this idea wherein the capabilities of business applications are exposed as sophisticated services that can be accessed over a network. This clearly demonstrates the utility of cloud computing in terms of business exhibiting both the demand and the supply side. The word “cloud” in cloud computing means that the architecture taking the form of a cloud which is easily accessible for users from anywhere in the world on demand. Cloud service providers are incentivized by the profits to be made by charging consumers for accessing these services. Another term for virtual computing can be cloud computing. Consumers, such as enterprises, are attracted by the opportunity for reducing or eliminating costs associated with “in-house” provision of these services. This infrastructure consists of data centers that are monitored and maintained round the clock by content providers. At present, it is common to access content across the Internet independently without reference to the underlying hosting infrastructure. "Cloud Computing offers virtually unlimited, on-demand computing resources (Moore & John , 2009)." Cloud computing "is less a new technology than it is a way of using technology to achieve economies of scale and offer self-service resources that are available on demand (Weinberg, 2009)." Virtual computing is the use of computing resources (hardware and software) that are delivered as a service over a network (typically the Internet). Virtual computing is an outsourcing option for many different kinds of technologies: applications, infrastructure, computing and development platform and virtual computing entrusts remote services with a user’s data, software and computation. Virtual computing has several characteristics that it shares with traditionally managed computing. For example, a client using virtual computing trades up-front capital outlay for hardware and software with a use-base or monthly fee.
The three main types of virtual computing environments are Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). IaaS contains the physical and virtual resources used to build the virtual environment. These virtual cloud providers provision and manage the physical processing, storage, networking and hosting environment. Here you will find the features that make a platform such as operating systems, web servers, programming language, database management systems and so on. This is where the provider provides elasticity. PaaS provides a complete computing platform. Pricing could take into account the type of database management system, the level of activity, the amount of storage and computational time/resources used. These virtual providers provision and manage cloud infrastructure as well as provide development, deployment and administration tools. SaaS can also be called on-demand software. This virtual computing type offers email, calendars, documentation management and a variety of other productivity applications.
For a user there is not upfront cost in servers or software licensing. Common examples of these applications are Salesforce.com, Google Apps, CRM and Live Support. Another example of virtual computing is Amazon.com which offers virtual computing allowing users to save their documents, photos and video on their server; therefore, saving resources on a user’s computer. Other similar providers of virtual storage are Google, IBM and IBM. Web based virtual computing offers APIs that enable developers to develop functionality over the internet, rather than delivering full-sized applications. Strike Iron, Xignite and ADP payroll processing are examples of APIs. One virtual computing application is SaaS which delivers a single application through the browser to thousands of customers using a multitenant architecture.
Virtual computing provides increased efficiency by allocating a computer’s processes to a virtual environment, making the computer available for other processes and applications. Virtual computing is flexible because you have the ability to use software when you need it without having to install, configure and store it on the computer. One advantage of virtual computing is a user can achieve quicker application speeds due to releasing the system, memory and storage. “Virtual computing users can run more than one operating system on one PC at the same time. Server virtualization allows computing power across many servers to be pooled and managed for better efficiency (Hugos & Hulitzky, 2010).”
Conclusion
Virtual computing allows organizations to save money and have resources for business operations. Many companies are embracing virtual computing because it enhances work productivity, allows for portability and allows for collaboration across teams. It also allows for lower costs quicker execution and greater flexibility.

Bibliography
(n.d.). Retrieved from http://www.vmware.com/virtualization/history.html
Fried, I. (2006, July 17). Retrieved from CNet.com: http://news.cnet.com/Putting-a-price-on-a-virtual-computer/2100-7339_3-6094502.html
Hugos, M., & Hulitzky, D. (2010). In Business in the Cloud: What Every Business Needs to Kow about Cloud Computing (p. 70). Hoboken: Wiley.
Moore, D., & John , H. (2009). Computing in the Clouds.
Voorsluys, W., Broberg, J., & Buyya, R. (2011). Cloud Computing:Principles and Paradigms. Wiley and Sons.
Weinberg, N. (2009). Nine Hot Technologies for '09. Network World.

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