Analysis Of Xen And The Art 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.

Significance: This topic is important to my audience because of the increasing number of people accessing the internet. Implementing virtualization

Virtual Machine Security - Full Virtualization and Para Virtualization are two kinds of virtualization in a cloud computing paradigm. In full virtualization, entire hardware architecture is replicated virtually. However, in para virtualization, an operating system is modified so that it can be run concurrently with other operating systems. VMM Instance Isolation ensures that different instances running on the same physical machine are isolated from each other. However, current VMMs do not offer perfect isolation. Many bugs have been found in all popular VMMs that allow escaping from VM (Virtual machine). Vulnerabilities have been found in all virtualization software, which can be exploited by malicious users to bypass certain security restrictions or/and gain escalated privileges. ation software running on or being developed for cloud computing platforms presents different security challenges. It is depending on the delivery model of that particular platform. Flexibility, openness and public availability of cloud infrastructure are threats for application security. The existing vulnerabilities like Presence of trap doors, overflow problems, poor quality code etc. are threats for various attacks. Multi-tenant environment of cloud platforms, the lack of direct control over the environment, and access to data by the cloud platform vendor; are the key issues for using a cloud application. Preserving integrity of applications being executed in remote machines is an open

Instead, multiple isolated subsystems, called containers, run on a single control host and access a single kernel. As shown in Figure 4, containers share the same OS kernel as the host; containers are usually more efficient than VMs, each of which requires a separate OS instance.

Read ONLY the introductory paragraph of this paper. Then answer the following questions about the introduction:

The extensive use of virtualization in implementing cloud infrastructure brings unique security concerns for customers or tenants of a public cloud service. Virtualization alters the relationship between the OS and underlying hardware - be it computing, storage or even networking. This introduces an additional layer -

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.

Network Based Virtualization is abstract storage of data applications from the host machine. This is well achieved through fibre channels connection between the machines and the servers running virtualization. The respective operating systems on the separate machines are not a factor to consider as they work independently. For it to achieve its expectations, the following services must be provided as below:

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.

Virtualization in a network is the most interesting thing I have learned about. In full virtualization, the virtual machine completely simulates a real physical host. This allows most operating systems and applications to run within the virtual machine without being modified in anyway. I would envision using virtualization when testing a new service or application in the development stages, testing the product on different operating systems. I think virtualization is brilliant, a problem that arises is security and how you go about protecting your data in the virtual machine. Placing a virtual firewall is a good way to protect your machine of routing the memory through physical machines that have a firewall to protect them. A benefit of cloud

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.

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.

VMware provides the vSphere application and similarly Microsoft provides Hyper-V application for the purpose of virtualization. Most of the major datacenter in the world use the VMware as their solution for virtualization. VMware dominates the server virtualization market in world due to its innovations, strategic partnerships and rock-solid products [2]. We shall be using VMware products to virtualize the hypothetical organization. The reasons for choosing VMware [3] are:

Cloud technologies revolve heavily around virtual machines that reside on physical servers (Talbot, 2009). One physical server could be the home of a slew of virtual machines; should an attacker interrupt the normal operations of a physical server it could result in the inoperability of the virtual machines also. One of the techniques can be used is an attacker implanting a virtual machine on a physical server (Talbot, 2009). Once the

Explain how the article builds on the seminal work of Oviatt and McDougall in their paper,.