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.

i. Server consolidation is the process of hosting multiple virtual machines (VM) on one physical server.

a virtual machine from one physical host to another in the event of a failure to provide fault tolerance.

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

[P3] Server virtualisation: This is the process of hiding all of the server resources including the amount of servers that a company has and the amount of processors etc. From the people using the server.

In computing, virtualization means to create a virtual version of a resource or device, like a server, storage

“The VMware strategy is to help customers achieve cloud-like efficiency and operational improvements across the major IT infrastructure investment areas” (Steve Herrod, 2010). To date this strategy has involved products and services targeting complexity in datacenter infrastructure (e.g. VMware vSphere™ and VMware vCenter™ Server), desktops (e.g. VMware View™ and VMware Fusion®), and application development (e.g. SpringSource, VMware Lab Manager, and VMware Workstation). With this, Zimbra,

By using virtual servers, our company is able to run everything on our physical servers. This includes our ERP, file and print, login server, applications, and mail. Our company will obtain a total of 10 Windows

It allows network administrators to create a virtual server environment by using some of the server’s resources. By doing this, it creates virtual/private servers and one of the benefits of this is that it would cost less money to use virtual servers rather than physical servers as hardware maintenance would not be required. Also, if one virtual server goes down, the others will still be left running. In the example above, there are 4 physical servers. Server Virtualization only needs one physical server to be able to create the virtual servers.

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:

By treating process as isolated virtual machines modern computers can run them concurrently while maintaining the stability, and data integrity. As the tech support for my family this has an enormous impact since the overall stability of these devices are vastly improved, and although complexity has increased, problems are better isolated and easier to fix. Consequently I spend less time fixing software problems.

Virtual networking computing – Virtual networking computing is used so that companies can test the PC which perhaps at fault or has problems that

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.

This business case investigation discusses in depth about the process of virtualization of servers in an organization and the various benefits of doing so. Giving a brief introduction to the concept of virtualization, it was introduced in the late 1960s when the resources of mainframe computers were divided between several applications. [1] The term virtualization has since then been expanded in terms of practical application. The conversion of the physical server into a pool containing several virtual machines which act individually as one computer is known is hardware virtualization.