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1、英文文献翻译系 部：专业年级：姓 名：学 号：Cloud Computing Issues, Research and Implementations ImplementationsCloud Computing-Issues,Research and Implementation Cloud Computing Issues, Research and Implementation Publishing unit:Information Technology InterfacesDate of publication(serial numbei): June 23-26, 2008, Cav
2、tat, CroatiaAuthor: Mladen A. VoukAbstract “Cloud” computing a relatively recent term, builds on decades of research in virtualization, distributed computing, utility computing, and more recently networking, web and software services. It implies a service oriented architecture, reduced information t
3、echnology overhead for the end-user, great flexibility, reduced total cost of ownership, on-demand services and many other things. This paper discusses the concept of “cloud” computing, issues it tries to address, related research topics, and a “cloud” implementation available today. Keywords Cloud
4、Computing; Virtual Computing Lab; virtualization; utility computing; end-to-end quality of service 1. Introduction “Cloud computing” is the next natural step in the evolution of on-demand information technology services and products. To a large extent cloud computing will be based on virtualized res
5、ources. Cloud computing predecessors have been around for some time now e.g., AEC08, Con08, Fos04, Glo08, Had08, IBM07c, Nao07, Net06, Reo07, VCL04, but the term became “popular” sometime in October 2007 when IBM and Google announced a collaboration in that domain e.g., Loh07, IBM07a. This was follo
6、wed by IBMs announcement of the “Blue Cloud” effort e.g., IBM07b. Since then, everyone is talking about “Cloud Computing”. Of course, there also is the inevitable Wikipedia entry Wik08. This paper discusses the concept of “cloud” computing, issues it tries to address, related research topics, and a
7、“cloud” implementation available today. Section 2 discusses concepts and components of cloud computing. Section 3 describes an implementation based on Virtual Computing Laboratory (VCL) technology. VCL has been in production use at NC State University since 2004, and is suitable vehicle for dynamic
8、implementation of almost any current cloud computing solution. Section 4 discusses cloud“ related research and engineering challenges. Section 5 summarizes and concludes the paper. 2. Cloud Computing A key differentiating element of a successful information technology (IT) is its ability to become a
9、 true, valuable, and economical contributor to cyberinfrastructure Atk03a. “Cloud” computing embraces cyberinfrastructure and builds upon decades of research in virtualization, distributed computing, “grid computing”, utility computing, and more recently networking, web and software services. It imp
10、lies a service oriented architecture, reduced information technology overhead for the end-user, greater flexibility, reduced total cost of ownership, on-demand services and many other things.2.1. Cyberinfrastructure “Cyberinfrastructure makes applications dramatically easier to develop and deploy, t
11、hus expanding the feasible scope of applications possible within budget and organizational constraints, and shifting the scientists and engineers effort away from information technology development and concentrating it on scientific and engineering research. Cyberinfrastructure also increases effici
12、ency, quality, and reliability by capturing commonalities among application needs, and facilitates the efficient sharing of equipment and services.” Atk03b Today, almost any business or major activity uses, or relies in some form, on IT and IT services. These services need to be enabling and applian
13、ce-like, and there must be an economy-of-scale for the total-cost-of-ownership to be better than it would be without cyberinfrastructure. Technology needs to 31Proceedings of the ITI 2008 30th Int. Conf. on Information Technology Interfaces, June 23-26, 2008, Cavtat, Croatia Authorized licensed use
14、limited to: improve end-user productivity and reduce technology-driven overhead. For example, unless IT is the primary business of an organization, less than 20% of its efforts not directly connected to its primary business should have to do with IT overhead, even though 80% of its business might be
15、 conducted using electronic means Vou08b. 2.2. Concepts A powerful underlying and enabling concept is computing through service-oriented architectures (SOA) - delivery of an integrated and orchestrated suite of functions to an end-user through composition of both loosely and tightly coupled function
16、s, or services - often network-based. Related concepts are component-based system engineering, orchestration of different services through workflows, and virtualization. 2.2.1. Service-Oriented Architecture SOA is not a new concept, although it again has been receiving considerable attention in recent years e.g., Bel08, IBM08a, Tho05. Examples of some of t
