Có 20+ tài liệu thuộc chủ đề "tài nguyên điện toán"
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The Grid: past, present, future. 1.1 THE GRID. In this book we consider the Grid in depth, describing its immense promise, potential and complexity from the perspective of the community of individuals working hard to make the Grid vision a reality.. In Section 1.2, we highlight some historical and motivational building blocks of the Grid – described in more detail...
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The Grid: A new infrastructure for 21st century science. Now, they want to calcu- late the structures of complex assemblies of macromolecules (see Figure 2.1) and screen thousands of drug candidates. three orders of magnitude faster than the state-of-the- art 56 kilobits per second (Kb s − 1 ) that connected U.S. Figure 2.1 Determining the structure of a complex...
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The evolution of the Grid. These aspects of the Grid are related to the evolution of Web technologies and standards, such as XML to support machine-to-machine communication and the Resource Description Framework (RDF) to represent interchangeable metadata.. In Section 3.5 we draw parallels with the evolution of the World Wide Web and introduce the notion of the ‘Semantic Grid’ in...
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Software infrastructure for the I-WAY high-performance distributed computing experiment. It is in this context that the I-WAY project [11] was conceived in early 1995, with the goal of providing a large-scale testbed in which innovative high-performance and geographically distributed applications could be deployed. In brief, the I-WAY was an ATM network con- necting supercomputers, mass storage systems, and advanced visualization...
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By ‘standard’ and ‘Grids’, we specifically mean Grids based on the common practice and standards coming out of the Global Grid Forum (GGF) (www.gridforum.org).. That is, these suites of software have provided the implementation of the Grid functions used in the IPG and DOE Science Grids.. A general design approach that allows a decentralized control and deployment of the software,....
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The anatomy of the Grid. The term ‘the Grid’ was coined in the mid-1990s to denote a proposed distributed com- puting infrastructure for advanced science and engineering [1]. Is there really a distinct ‘Grid problem’ and hence a need for new ‘Grid technologies’? If so, what is the nature of these technologies, and what is their domain of applicability? While...
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Rationale for choosing the Open Grid Services Architecture. This chapter presents aspects of the UK e-Science communities’ plans for generic Grid middleware. In particular, it derives from the discussions of the UK Architecture Task Force [1].. The UK e-Science Core Programme will focus on architecture and middleware develop- ment in order to contribute significantly to the emerging Open Grid Services...
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The physiology of the Grid. 1 Globus Project and Globus Toolkit are trademarks of the University of Chicago.. OGSA also defines interfaces for the discovery of Grid service instances and for the creation of tran- sient Grid service instances. OGSA’s support for the discovery of service properties facilitates the mapping or adaptation of higher-level Grid service functions to such native...
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The Grid services allow the entire collection to be seen as a seamless information processing system that the user can access from any location. The heterogeneous nature of the underlying resources remains a significant barrier. The problem becomes even more complex when the application is a distributed computation that requires a user to successfully launch a heterogeneous collection of applications...
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We begin with a discussion of the fundamental requirements for any Grid architecture. We then present some of the principles and philosophy underlying the design of Legion. We introduce some of the architectural features of Legion and delve slightly deeper into the implementation in order to give an intuitive understanding of Grids and Legion. The resources in a Grid typically...
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Such lessons were not lost on the system designers of the early 1980s. In contrast to the dominant centralized control model of the day, Condor was unique in its insistence that every participant in the system remain free to contribute as much or as little as it cared to.. The Condor system soon became a staple of the production-computing environment...
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Architecture of a commercial enterprise desktop Grid:. the Entropia system. ‘distributed computing’, the assembly of large numbers of PCs over the Internet. ‘distributed computing’ systems and leverage the unused capacity of high performance desktop PCs (up to 2.2-GHz machines with multigigaOP capabilities [1. Such ‘distributed computing’. or desktop Grid systems leverage the installed hardware capability (and work well even with...
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13.1 INTRODUCTION. The goal of autonomic computing is the reduction of complexity in the management of large computing systems. The evolution of computing systems faces a continuous growth in the number of degrees of freedom the system must manage in order to be efficient. Two major factors contribute to the increase in the number of degrees of freedom: Historically, computing...
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Databases and the grid. This chapter examines how databases can be integrated into the Grid [1]. Almost all early Grid applications are file-based, and so, to date, there has been relatively little effort applied to integrating databases into the Grid. However, if the Grid is to support a wider range of applications, both scientific and otherwise, then database integration into...
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In addition to computing resource scheduling, Data Grids address the problems of storage and data man- agement, network-intensive data transfers and data access optimization, while maintaining high reliability and availability of the data (see References [2, 3] and references therein).. The Open Grid Services Architecture (OGSA) [1, 4] builds upon the anatomy of the Grid [5], where the authors present...
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A data collection contains named entities that may in actuality be stored in any of the repositories mentioned above. Some of the key services are naming, location transparency, federation, and information integration. In the following sections, we define. ‘digital entities’ in the Grid as combinations of data, information, and knowledge, and define the requirements for persistence (Section 16.2). The state...
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It is this broader view of the e-Science infrastructure that we adopt in this document and we refer to this as the Semantic Grid [2]. The Grid metaphor intuitively gives rise to the view of the e-Science infrastructure as a set of services that are provided by particular individuals or institutions for consumption by others. Given this, and coupled with...
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18.1 PEER-TO-PEER GRIDS. In Section 18.2, we describe the overall architecture of a P2P Grid emphasizing the role of Web services and in Section 18.3, we describe the event service appropriate for linking Web services and other resources together. 18.2 KEY TECHNOLOGY CONCEPTS FOR P2P GRIDS. Figure 18.1 shows a traditional Grid with a Web [Open Grid Services Architecture (OGSA)]...
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19.1 INTRODUCTION. For example, the scale of the next generation Large Hadron Collider project at CERN, the European Organization for Nuclear Research, motivated the construction of the Euro- pean DataGrid (EDG) [2], which is a global software infrastructure that ties together a massive set of people and computing resources spread over hundreds of laboratories and university departments. The network is...
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Grid computing environments. Overview of Grid computing environments. 20.1 INTRODUCTION. It puts the corresponding section of this book in context and integrates a survey of a set of 28 chapters gathered together by the Grid Computing Environment (GCE) group of the Global Grid Forum, which is being published in 2002 as a special issue of Concurrency and Computation: Practice and...