The Disadvantages Of Virtualization

Virtualization is a combination of software and hardware engineering that creates Virtual Machines (VMs) - an abstraction of the computer hardware that allows a single machine to act as if it were many machines, or a computer that does not physically exist as a piece of hardware. The hardware that is seen by the operating system is emulated in an effort to separate the physical hardware from operating system. This allows the virtual machine to be moved and hosted on any machine independent of hardware. Virtualization technology is possibly the single most important issue in IT and has started a top to bottom overhaul of the computing industry which is why many companies around the world have are using its softwares to enhance their business opportunities.

Server Virtualisation, Video on Demand, VoIP, Web Interfacing, Mobile Networking and Cloud Computing, Video Conferencing. [P3]

Virtualization also minimizes the cost of maintaining a datacenter by reducing energy cost, minimizing server sprawl and eliminating under utilization. As BMG embarks on their expansion projects, new virtual machines can be deployed quickly to accommodate the additional capacity required to grow their infrastructure dynamically without expending an enormous amount of capital.

Virtualization is being able to give a physical device the power, through the use of software, to do more than that physical device was technically designed and able to do (Santana, 2014, p. 12). For example, a server can only run one operating system at a time. However, when a hypervisor is used in a server, the hypervisor is a layer of software that acts like the server itself so that many operating systems can be run from that one server. The hardware, in this case a server, has been virtualized. The goal is to use all of the computer’s resources all of the time, and the only way to do that is to have enough things running that the resources are being used consistently and efficiently. An analogy for this could be online classes. If each teacher only had one student, the teacher’s resources of time and expertise would not be utilized efficiently because that one student will not need help all day, every day. If the teacher is assigned to fifteen students, the students can still get help when needed from the teacher, and they would not even be aware that they are not alone in the class. Because it is an online class, the teacher does not need any more physical resources to teach an entire class than was needed for one student. The students are receiving the benefits of being taught by that teacher without needing to be with him or her physically.

As we all know virtualization is the requirement of future. We have evolved from the age of traditional environment to virtual environment.We have grown accustomed to almost all things virtual from virtual memory to virtual networks to virtual storage.The most widely leveraged benefit of virtualization technology is server consolidation, enabling one server to take on the workloads of multiple servers. For example, by consolidating a branch office’s print server, fax server, exchange server, and web server on a single windows server, businesses reduce the costs of hardware, maintenance, and staffing.

Cloud Services and Virtualization continue to grow in popularity but are they right for your business? These technologies can reduce overhead operation costs, improve utilization of resources and provide a level of flexibility to the organization’s Information Technology (IT) system. Understanding that these technologies do and their pros and cons is the foundation of choosing the right features for your business. Cloud services offer three types of services; Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS) to meet the software, infrastructure needs of a business and provides them on a lease type of payment plan. Virtualization has three types of server virtualization, Full virtualization, Para-Virtualization and OS level Virtualization. Similar to Cloud services Virtualization types have features which may suit one business over another. Comparing the features provided by these technologies to total ownership of the IT system is also crucial in selecting the best services for your company as there can be an array of combinations of services contracted and internally owned features. While the perks of these technologies can be beneficial for an organization they should be carefully researched and tailored to the business strategic goals for

In today’s world you will find that the concept of virtualization seems to be the all new fad that everyone is jumping on the bandwagon to start using. Were in fact the concepts of virtualization started way back in the 1960 with main frame and Unix systems.

This virtualization service will reduce cost and the company will have reduction in server related capital investment by 70% and a reduction in operational cost by 30% to 40% compared to the physical server.( Accenture_Client_Success_Telstra_Virtualization)

Large corporations might choose to consolidate their IT system in one virtualized (and very expensive) server farm saving on hardware, support and maintenance costs over time.

Let’s take an example of how VMware transforms a physical PC into multiple virtual machines. In today’s virtualization world, VMware is playing a key role in addressing IT challenges of physical/virtual infrastructure. VMware is bringing the power of cloud computing to the data center, delivering the best platform for building cloud infrastructures.

While these are valid concerns that should be considered, the benefits of virtualization far outweigh the negatives in most situations. This is especially true when the deployment is well thought, configured, and maintained correctly. A properly designed and implemented virtual environment can save money on future hardware costs by consolidating resources. It also provides an excellent way to provide redundancy to critical servers and applications. One of, if not the biggest advantage, however, would have to be the ease and speed of deployment. This brings a level of simplification to IT management that simply does not exist in an environment with physical machines. Other advantages include lower power consumption, ease of creating test environments, and improved disaster recovery abilities (InfoWorld, 2011).

A virtual machine (VM) is a working structure (OS) or application that is exhibited on programming, which copies conferred outfit. The end client has a dubious unlawful relationship on a virtual machine from they would have submitted gear.

Virtualization has recently spread widely among businesses as an IT solution; and became one of the most used products regardless of the business size due to its benefits (Occupytheory 2015). However; before adopting virtualization companies should know in addition to the advantages of virtualization the disadvantages associated with its adoption and then to decide whether to adopt it or not. Main advantages and disadvantages of virtualization of virtualization are illustrated in table

The security aspects of virtualization are of vital importance.The cost benefits of virtualization allows enterprises to significantly reduce the space and electrical power required to run data centers and streamline the management of an ever-growing number of servers. Virtualization also provides means for expedient scalability. Given today 's economic climate and cost-cutting mandates, it is not surprising that a firm analyst Gartner recently predicted that 50 percent of workloads will run inside virtual machines by 2012. According to reports from Odyssey, “beyond the benefits of economic savings and enhanced flexibility in capacity planning, virtualization also introduces a number of threats and challenges to the security of organizational information. Among such threats and challenges is the increased network complexity and diminished visibility of the network traffic flowing within the virtual environment, which makes it difficult to detect Malicious “insider” Activity and Attacks. In the event that an internal malicious user or an attacker manages to compromise the virtualization layer, or hypervisor, this could lead to a compromise of all servers hosted on this virtual environment and as a result all applications and data residing in it.”

When we use the word ‘virtualisation’ we are referring to the act of creating a virtual version of technologies found in the world of computing. Technologies such as, operating systems, servers or a storage device. Virtualisation is a tactical and highly effective way of lowering IT cost while at the same time