A Model for Comparing Free Cloud Platforms

Abstract

VMware, VirtualBox, Virtual PC and other popular desktop virtualization applications are used only by a few users of IT techniques. This article attempts to make a comparison model for choosing the best cloud platform. Many virtualization applications such as VMware (VMware Player), Oracle VirtualBox and Microsoft Virtual PC are free for home users. The main goal of the virtualization software is that it allows users to run multiple operating systems simultaneously on one virtual environment, using one computer desktop.Keywords: Cloud Computing, Virtualization, Jaccard Index, Comparing Model(ProQuest: ... denotes formulae omitted.)1 IntroductionThe desktop virtualization software allows multiple operating systems to install on a computer or laptop in a virtual environment without disturbing the host operating system. Moreover, in many such programs, one can change to another operating system without rebooting the computer. The main advantage of these applications is that they can be used on technically weaker computers, taking advantage of the virtual machine features on the server. [16], [17]The advantages of virtualization platforms are:1) Multiple operating systems can be used at a time, without rebooting.2) They represent a completely isolated medium from the host operating system, because it is a virtual environment. Therefore, the possibility of infection with viruses or other unwanted items while working decreases.3) They allow the running of different applications or different operating systems on one type of computer. For example, if one wishes to run some applications that only work in Win XP on a system that has installed Win 8, one can install a virtual machine on the existing system (with Win 8 installed) that simulates running Win XP.4) The restoration of a virtual machine is very fast. For example, one can open the virtual machine selecting an older configuration. This function is usually called Snapshot. The Snapshot feature is usually used to create tests on the system.Benefits obtained from the use of cloud computing services [15]* Globalization for access to resources - people around the world can access cloud resources using the Internet.* They make savings by increasing the volume or the productivity. Thus, lower costs per unit, project or product obtain.* They allow running Streamline processes, which leads to obtaining a high efficiency by comparing the results obtained to the corresponding time and the people involved.* They increase accessibility. Access can be made from anywhere, anytime.* The monitoring of the proj ects is more effective.* The levels of training of technical staff are lower. It requires fewer persons to configure and maintain hardware and software platforms.* Savings on software licensing. There is no need to purchase expensive software licenses or software.* They reduce the cost of capital. Companies can make great savings on hardware costs or software.* Mobility - Employees with access to the internet can work anywhere. This flexibility positively affects the work-life balance for employees leading to increased labour productivity.* Increasing flexibility. Changes can be made quickly without involving additional costs.* They reduce spending money on technology infrastructure. Some technologies may be used only on demand when needed in certain projects.* Flexibility - quickly meet business demands* Payment for use - cloud services are usually paid only as long as they are used. Because cloud computing is quickly implemented in any company, start-up costs and running costs are minimal.* Increased Collaboration - Cloud computing increases the level of collaboration, while enabling collaborative work* Document Management - Cloud computing keeps all files in a central location and everyone is working on one version of the document. …