QEMU is a machine emulator that is able to emulate environment of various hardware platforms, including PC, PowerPC, ARM and SPARC. The goal of this master thesis is to port QEMU to HelenOS, thus allowing developers run the emulation of HelenOS inside HelenOS. The thesis contains a detailed analysis of the possible porting approaches (including the port of prerequisite libraries or their replacements) and an analysis of the features of QEMU (a reasonable subset of all features of QEMU) that are essential for achieving the goal and features that can be omitted in the prototype implementation. The primary focus of the implementation is to support the PC (x86 and x86-64) guest environment. Although not part of the prototype implementation, the thesis also focuses on analyzing the requirements for running QEMU as a virtualization hypervisor in HelenOS. Powered by TCPDF (www.tcpdf.org)

This thesis discusses the increasing performance of Platform as a Service using virtualiza-tion. It focuses on the new trends in the provision of IT services, which is virtualization. Possibility of huge savings and improvement of performance of the hardware is interesting for every company, that's why a lot of companies want to migrate to the vir-tual infrastructure. The first part defines IT service and its categories. It describes the development of IT service and brings definitions based on multiple resources. The second part characterizes cloud computing services. This part focuses on the actual composition of the various forms of technology deployments and distribution models. Further focuses on the main benefits and disadvantages of the types of cloud computing. The focus of third part is virtualization. This part presents a five-step procedure for that matter the transition to virtualization. Chapter helps to understand the value that may pose to the enterprise virtualization. The fourth section deals with virtualization in a particular environment. This part brings specific solution of infrastructure virtualization together with the creation of the virtual machine for a new user.

The aim of this master's thesis is to select a suitable option to replace outdated hardware equipment of the company RR Donnelley Prague s.r.o.. In the theoretical part, terms 'virtualization', 'cloud' and their models are explained. Next, RR Donnelley Prague is described and the current situation in terms of hardware infrastructure and outsourced services is analysed. The practical part contains a recommendation of possible solutions of the situation described and, particularly, a selection of criteria assessed and a multi-criteria evaluation of proposed solutions. To estimate weights of the criteria, a scoring method and a paired comparison method is applied. The multi-criteria evaluation of options uses the weighted sum method and TOPSIS. In the end, results of the applied methods are compared and benefits of the thesis for the company and the author are quantified.

The Diploma thesis analyzes the attitude of small and medium Czech enterprises towards the Green IT and sustainability concept. Several practices such as consolidation and virtualization of servers, desktop virtualization, cloud computing, energy management, dematerialization and recycling are discussed with regards to their contribution to global sustainability. The common denominator of most of the Green IT practices is the energy consumption reduction. The increasing information technology's demand for energy is viewed as a major contributor to the global carbon footprint and Green IT practices are assessed in terms of how much energy can be saved by incorporating them in a company policy. Besides energy consumption material aspects are another significant part of Green IT. Both the toxicity of certain materials used in the manufacturing process and the increased need for proper recycling of electronic waste are discussed in respective chapters. Information technology does not only add to the global carbon footprint, but it can also provide means to reduce the emissions of other sectors. Companies can reduce their energy consumption by improving logistics (smart logistics) or buildings (smart buildings) efficiency. Teleworking is another practice which enables millions of people work outside their office and contributes to global sustainability. The analytical part presents a survey of Czech small and medium enterprises and their attitude to Green IT. The main objective of the survey is to find out how many companies have implemented Green IT into their company policy. Company representatives report on which Green IT practices they have adopted and why. Responses are analyzed and findings and conclusions are presented.

The thesis deals with the topic of complexity of current IT. As a result, the consolidation of servers using virtualization is the answer to permanently growing complexity of server infrastructure. The thesis summarizes the basic aspects of this issue, compares the contributions and tries to analyze problems which can emerge. Further, it points a way of consolidation journey, compares different types of virtualization and elaborates the contributions of virtualization for corporate IS/ICT and its flexibility of solution. It analyzes present state of the market with virtualization tools, describes and compares some products of the market key players and analyzes the new opportunities for virtualization, e. g. the virtual desktop infrastructure. At the end, it suggests an approach for consolidated project solution in practice and tries to show some basic steps which should not be omitted. Besides the complex view to the topic, the thesis also presents the contributions, risks and questions to be raised and, at least partly, answers these questions.

The focus of this work is to create a method for the selection of the concept of on-premise IT infrastructure. The document is divided into six chapters, where the first is dedicated to brief introduction and definition of objectives of the work. The second chapter focuses on current state of the problem, which includes research of similar works and definitions of used terms. The third chapter is devoted to describing conceptions as the basis for the fourth chapter, which deals with construction of the method. The fifth chapter is devoted to the verification of the method in a real world environment and last chapter summarizes the whole thesis.

This diploma thesis describes possible solutions of IT infrastucture optimizing using new technologies, such as cloud computing, desktop virtualization and providing software as a service. It gives an analysis of the actual state of IT infrastucture in organization and drafts a suitable economical and system solution. It also describes individual areas of information technologies and their advantages. Finally, it focuses on selecting the most suitable technology with the assessment of its economic benefit for the company.

Abstract This thesis deals with the process of server consolidation, which is tightly connected to IT infrastructure of virtually any organization. Moreover it is dealt in some respect with the way the organization runs and with linking these two particular areas together. The goal of this thesis is to identify consequences or impacts of server consolidation process on the way the organization functions and on methods how to measure these impacts. One of the steps towards this goal is unmistakably analyzing the planning and deployment of server consolidation including virtualization technology. Server consolidation is characterized as a process leading to simplified and more effective IT infrastructure of an organization. To analyze the IT infrastructure in complete and systematic way it is used framework called IT Infrastructure Library respectively part of it called ICT Infrastructure Management. Because of that linking of the server consolidation process progress to organization's global goals is granted. Contribution of this thesis can be seen in complex analysis of the consequences of the server consolidation process to the functioning of an organization. Especially in areas that are usually not being considered in connection with server consolidation, which is considered to be IT matter, such as human resources and social enviroment. Key words: server consolidation, server consolidation consequences, ICT Infrastructure Management, Virtualization

The diploma thesis deals with the possibilities of using application virtualization in the Windows environment. The theoretical part describes the operating principle of application virtualization. Furthermore, there are specified the individual characteristics and the reasons for the move to application virtualization. The author provides the basic overview and comparison of the specific ways of virtualization. The appropriate solution of the practical part was based on the Saaty method. In the practical part, the author describes in detail how to implement and use the chosen technology. Based on practical experience, he assesses functioning of the solution. The final part of the thesis includes both general and specific recommendations for the use of application virtualization.

The purpose of this dissertation work involves creation and automation of my own cloud security and stability testing techniques. The basis of this project is to explore and outline the virtual environment protection level in front of different types of security and stability networking attacks. Theoretical part of this paper consists of concepts and, together with their definitions and reference to relevant research literature, science related publications and online sources that best describes testing methodology of cloud computing, focused on security and virtualization. The practical part of the thesis demonstrate an understanding of theories and concepts that been studied. Based on the obtained research results, have been developed various automation tests that are going to be run on virtual environment in order to test their stability.