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International Conference on Advanced computing and Communications (ADCOM)

作者： Thamarai Selvi Somasundaram R.A. Balachandar Vijayakumar Kandasamy Rajkumar Buyya Rajagopalan Raman N. Mohanram S. Varun Department of Information Technology Anna University Chennai India Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia Centre for Development of Advanced Computing Chennai India Centre for Development of Advanced Computing Bangalore India

This paper addresses the need of semantic component in the grid environment to discover and describe the grid resources semantically. We propose semantic grid architecture by introducing a knowledge layer at the top of Gridbus broker architecture and thereby enabling broker to discover resources semantically. The semantic component in the knowledge layer enables semantic description of grid resources with the help of ontology template. The ontology template has been created using Protege-OWL editor for different types of computing resources in the grid environment. The Globus Toolkit's MDS is used to gather grid resource information and Protege-OWL libraries are used to dynamically create knowledge base of grid resources. Algernon inference engine is used for interacting with the knowledge base to discover suitable resources.

关键词： Distributed computing Ontologies Middleware Computer architecture Computer networks Grid computing Libraries Engines Monitoring Aggregates

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GSAF: A Grid-based Services Transfer Framework

GSAF: A Grid-based Services Transfer Framework

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Jun Tang Chunyan Miao Qifeng Lin Mi Zhang Wei Wang Baile Shi Department of Computing Information and Technology Fudan University China Divisions of Software Systems School of Computer Engineering Nanyang Technological University Singapore E-Business Research Center Software School Fudan University China

In recent years, traditional computing systems face the problems of scalability as the need for information processing services is ever increasing. Grid, as a pool of computing resources, solves the problem in some degree by providing an integrated computing and resources environment. Thus, there emerge many strategies related to grid resource allocation management (GRAM). However, almost all of these strategies focus on how to allocate the existing computing resources but overlook the possibility of controlling these resources. Therefore, services and computing nodes are always tightly coupled. In this paper, we describe a new framework called GSAF (a grid-based services transfer framework) to solve the problem. GSAF binds services and computing nodes dynamically through services migration and service cache to break the tight coupling. The migration of service components to more efficient computing nodes helps balance the processing burden and extends the computing abilities. In our experiment, we provide a prototype application of GSAF in the data mining system to demonstrate it.

关键词： Grid computing Resource management Containers Prototypes Data mining Runtime software systems Face Scalability Information processing

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Towards a Grid of Sensors for Telemedicine

Towards a Grid of Sensors for Telemedicine

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Annual IEEE Symposium on Computer-Based Medical systems

作者： C.O. Rolim F.L. Koch M. Assuncao C.B. Westphall Network and Management Laboratory Federal University of Santa Catarina Florianopolis Santa Catarina Brazil Grid Computing and Distributed Systems Laboratory and NICTA Victoria Laboratory Department of Computer Science and Software Engineering University of Melbourne Melbourne VIC Australia

In this article, we describe a grid of sensors to collect patients' vital data and to allow real time monitoring of patients in heath-care centres. We analyse the problem scenario and identify the components involved towards the construction of an integrated and homogeneous management system. Finally, we present a case study to demonstrate the applicability of our approach

关键词： Telemedicine Grid computing Laboratories Real time systems Sensor systems Patient monitoring Computerized monitoring Data security Ontologies Computer architecture

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Methodological contributions to the construction of virtual environments on the Internet

Methodological contributions to the construction of virtual ...

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1st International Conference on Internet Technologies and Applications, ITA 05

作者： Castán, Héctor Sanjuán, Oscar Aguilar, Luís Joyanes Segovia, Javier Department of Languages and Systems and Software Engineering Pontifical University of Salamanca Madrid Campus Spain Department of Languages and Systems and Software Engineering Polytechnic University of Madrid Spain

ISBN: (纸本)0946881324

Virtual reality systems should provide a satisfactory immersive experience for the user. However, the time needed to fully download and display them in the user platform, and long-time delays to start an interaction, may negatively influence the users perception of the overall quality. In order to obtain high quality networked virtual environments in the Internet, as it happens with other software development projects, including a "quality phase" seems not to be enough. This paper proposes a series of development guidelines for virtual environments with the aim of both making the development process easier and improving the final system.

关键词： software design

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A taxonomy of workflow management systems for Grid computing

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Journal of Grid computing 2005年第3-4期3卷 171-200页

作者： Yu, Jia Buyya, Rajkumar Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering The University of Melbourne Melbourne Vic. Australia

With the advent of Grid and application technologies, scientists and engineers are building more and more complex applications to manage and process large data sets, and execute scientific experiments on distributed resources. Such application scenarios require means for composing and executing complex workflows. Therefore, many efforts have been made towards the development of workflow management systems for Grid computing. In this paper, we propose a taxonomy that characterizes and classifies various approaches for building and executing workflows on Grids. We also survey several representative Grid workflow systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the design and engineering similarities and differences of state-of-the-art in Grid workflow systems, but also identifies the areas that need further research. © Springer Science+Business Media, Inc. 2006.

关键词： Grid computing Resource management Scheduling Taxonomy Workflow management

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Evaluating the usability of Internet networked virtual environments

Evaluating the usability of Internet networked virtual envir...

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1st International Conference on Internet Technologies and Applications, ITA 05

作者： Castán, Hector Sánchez-Alonso, Salvador Department of Languages and Systems and Software Engineering Pontifical University of Salamanca Madrid Campus Spain Computer Science Department University of Alcala Madrid Spain

ISBN: (纸本)0946881324

Internet networked virtual environments, such as VRML-based environments, should provide a satisfactory immersive experience to users. However, the time needed to download them and display them in the user platform, as well as the time delays in effectively starting an interaction, may adversely influence the overall user satisfaction. This article shows the results of a series of usability tests oriented towards improving Internet networked virtual environments construction by analysing the influence of time delays and other problems in the users' perception of virtual environments.

关键词： Time delay

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The grid economy

The grid economy

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作者： Buyya, Rajkumar Abramson, David Venugopal, Srikumar Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Vic. 3010 Australia School of Computer Science and Software Engineering Monash University Vic. 3163 Australia

This paper identifies challenges in managing resources in a Grid computing environment and proposes computational economy as a metaphor for effective management of resources and application scheduling. It identifies distributed resource management challenges and requirements of economy-based Grid systems, and discusses various representative economy-based systems, both historical and emerging, for cooperative and competitive trading of resources such as CPU cycles, storage, and network bandwidth. It presents an extensible, service-oriented Grid architecture driven by Grid economy and an approach for its realization by leveraging various existing Grid technologies. It also presents commodity and auction models for resource allocation. The use of commodity economy model for resource management and application scheduling in both computational and data grids is also presented. © 2005 IEEE.

关键词： Computational methods

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An integration of Global and Enterprise Grid computing: Gridbus Broker and Xgrid perspective

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4th International Conference on Grid and Cooperative computing - GCC 2005

作者： De Assunção, Marcos Dias Nadiminti, Krishna Venugopal, Srikumar Ma, Tianchi Buyya, Rajkumar Grid Computing and Distributed Systems Laboratory Australia Department of Computer Science and Software Engineering University of Melbourne Parkville Campus Melbourne Vic. 3010 Australia

ISBN: (纸本)3540305106

In this work, we present two perspectives of Grid computing by using two different Grid middleware as examples: an Enterprise Grid using Xgrid and a Global Grid with Gridbus. We also present the integration of Enterprise and Global Grids by proposing the integration of Gridbus Broker with diverse enterprise Grid middleware including Xgrid, PBS, Condor and SGE. The sample performance results demonstrate the usefulness of this integration effort. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Distributed computer systems

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Do computer science students know what they know?: A calibration study of data structure knowledge

Do computer science students know what they know?: A calibra...

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ITiCSE 2005: 10th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education

作者： Murphy, Laurie Tenenberg, Josh Department of Computer Science and Computer Engineering Pacific Lutheran University Tacoma WA 98447-0003 United States Computing and Software Systems Institute of Technology University of Washington Tacoma Tacoma WA 98402-3100 United States

ISBN: (纸本)1595930248

This paper describes an empirical study that investigates the knowledge that Computer Science students have about the extent of their own previous learning. The study compares self-generated estimates of performance with actual performance on a data structures quiz taken by undergraduate students in courses requiring data structures as a pre-requisite. The study is contextualized and grounded within a research paradigm in Psychology called calibration of knowledge that suggests that self-knowledge across a range of disciplines is highly unreliable. Such self-knowledge is important because of its role in meta-cognition, particularly in cognitive self-regulation and monitoring. It is also important because of the credence that faculty give to student self-reports. Our results indicate that Computer Science student self-estimates correlate moderately with their performance on a quiz, more so for estimates provided after they have taken the quiz than before. The pedagogical implications are that students should be provided with regular opportunities for empirical validation of their knowledge as well as being taught the metacognitive skills of regular self-testing in order to overcome validation bias. Copyright 2005 ACM.

关键词： Data structures

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Service Level Agreement based Allocation of Cluster Resources: Handling Penalty to Enhance Utility

Service Level Agreement based Allocation of Cluster Resource...

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IEEE International Conference on Cluster computing

作者： Chee Shin Yeo Rajkumar Buyya Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia

Jobs submitted into a cluster have varying requirements depending on user-specific needs and expectations. Therefore, in utility-driven cluster computing, cluster resource management systems (RMSs) need to be aware of these requirements in order to allocate resources effectively. Service level agreements (SLAs) can be used to differentiate different value of jobs as they define service conditions that the cluster RMS agrees to provide for each different job. The SLA acts as a contract between a user and the cluster whereby the user is entitled to compensation whenever the cluster RMS fails to deliver the required service. In this paper, we present a proportional share allocation technique called LibraSLA that takes into account the utility of accepting new jobs into the cluster based on their SLA. We study how LibraSLA performs with respect to several SLA requirements that include: (i) deadline type whether the job can be delayed, (ii) deadline when the job needs to be finished, (iii) budget to be spent for finishing the job, and (iv) penalty rate for compensating the user for failure to meet the deadline

关键词： Resource management Grid computing Quality of service Delay Finishing Admission control Laboratories Computer science software engineering Contracts

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