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International Symposium on Computer Architecture and High Performance computing (SBAC-PAD)

作者： Tianchi Ma R. Buyya Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Parameter-sweep has been widely adopted in large numbers of scientific applications. Parameter-sweep features need to be incorporated into grid workflows so as to increase the scale and scope of such applications. New scheduling mechanisms and algorithms are required to provide optimized policy for resource allocation and task arrangement in such a case. This paper addresses scheduling sequential parameter-sweep tasks in a fine-grained manner. The optimization is produced by pipelining the subtasks and dispatching each of them onto well-selected resources. Two types of scheduling algorithms are discussed and customized to adapt the characteristics of parameter-sweep, as well as their effectiveness has been compared under multifarious scenarios.

关键词： Scheduling algorithm Application software Sensor arrays Grid computing Filtering Data visualization Processor scheduling Resource management Laboratories Computer science

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Cost-based scheduling for data-intensive applications on global grids 05

Cost-based scheduling for data-intensive applications on glo...

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International Symposium on High Performance Distributed computing

作者： S. Venugopal R. Buyya Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

We present an algorithm for scheduling distributed data intensive bag-of-task applications on data grids that have costs associated with requesting, transferring and processing datasets. We evaluate the algorithm on a... 详细信息

ISBN: (纸本)9780780390379

关键词： Processor scheduling Costs Grid computing Application software Physics Computer networks Laboratories Computer science software engineering Testing

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A time optimization algorithm for scheduling bag-of-task applications in auction-based proportional share systems

A time optimization algorithm for scheduling bag-of-task app...

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International Symposium on Computer Architecture and High Performance computing (SBAC-PAD)

作者： A. Sulistio R. Buyya Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Carlton VIC Australia

Grid and peer-to-peer (P2P) network technologies enable aggregation of distributed resources for solving large-scale and computationally-intensive applications. These technologies are well-suited for bag-of-tasks (BoT) applications, because each application consists of many parallel and independent tasks. With multiple users competing for the same resources, the key challenge is to finish a user application within a specified deadline. In this paper, we propose a time optimization algorithm that schedules a user application on auction-based resource allocation systems. These allocation systems, which are based on proportional share, allow users to bid higher in order to gain more resource shares. Therefore, this algorithm adjusts a user bid periodically on these systems in order to finish the application on time.

关键词： Scheduling algorithm Application software Resource management Peer to peer computing Processor scheduling Grid computing Computer applications Large-scale systems Computer networks Distributed computing

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Cost-based scheduling of scientific workflow applications on utility grids

Cost-based scheduling of scientific workflow applications on...

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IEEE International Conference on e-Science and Grid computing

作者： Jia Yu R. Buyya Chen Khong Tham Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia Department of Electrical and Computer Engineering National University of Singapore Singapore

Over the last few years, grid technologies have progressed towards a service-oriented paradigm that enables a new way of service provisioning based on utility computing models. Users consume these services based on their QoS (quality of service) requirements. In such "pay-per-use" grids, workflow execution cost must be considered during scheduling based on users' QoS constraints. In this paper, we propose a cost-based workflow scheduling algorithm that minimizes execution cost while meeting the deadline for delivering results. It can also adapt to the delays of service executions by rescheduling unexecuted tasks. We also attempt to optimally solve the task scheduling problem in branches with several sequential tasks by modeling the branch as a Markov decision process and using the value iteration method

关键词： Optimal scheduling Processor scheduling Scheduling algorithm Workflow management software Grid computing Quality of service Costs Computer networks Time factors Delay

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Panel: Using peer review in teaching computing

Panel: Using peer review in teaching computing

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Proceedings of the Thirty-Sixth SIGCSE Technical Symposium on Computer Science Education, SIGCSE 2005

作者： Gehringer, Edward F. Chinn, Donald D. Ardis, Mark A. Pérez-Quinones, Manuel A. North Carolina State University Depts. of Computer Science and ECE Raleigh NC 27695-7256 Univ. of Washington at Tacoma Dept. of Computing and Software Systems Tacoma WA 98402 Rose-Hulman Institute of Technology Dept. of Computer Science and Software Engineering Terre Haute IN 47803 Department of Computer Science Virginia Tech Blacksburg VA 24061

ISBN: (纸本)1581139977

For generations, the academic community has relied on peer review as a way of encouraging scholarship and enhancing the knowledge base. Peer review has been widely used in the classroom since at least the 1970s, with hundreds of papers on its use in diverse academic fields appearing in the literature (for a comprehensive survey, see [1]). Its use appears to be on the upswing, given the current interest in active learning and teamwork. In computer science, peer review seems to have very broad application. It can be used to evaluate the contributions of various members to a project team;it can be used for design documents and code reviews, in writing assignments, and in capstone project courses. The experience of the panelists is illustrative of the wide range of peer-review practices. This panel will serve to introduce the audience to some of these applications. Since many computer-science instructors have experimented with peer review, we are anxious to have them share their experiences during the open discussion period.

关键词： Computer science

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Service-oriented software reengineering: Bertie3 as Web services

Service-oriented software reengineering: Bertie3 as Web serv...

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IEEE International Conference on Web Services (ICWS)

作者： S. Chung P.S. Young J. Nelson Computing & Software Systems Institute of Technology University of Washington Tacoma Tacoma WA USA Department of Computer Science College of Engineering University of Illinois Urbana-Champaign Urbana IL USA Interdisciplinary Arts & Sciences University of Washington Tacoma Tacoma WA USA

This research proposes to modernize a legacy software system by using Web services as the main building blocks of the software reengineering. For this purpose, a legacy theorem proof checking and derivation tool called Bertie3 is reengineered in terms of service-oriented architecture, service-oriented componentization, and external data representation and serialization. With the Web services of derivation checking engines and first-order markup languages, a minimal amount of development time can be spent working on well-known and well-developed components. More time can be spent updating the features that make the tool unique. This case study shows that modernizing a software system with Web services will allow the business components of the system to be easily expanded and integrated with other application components for future demands.

关键词： Web services Logic Markup languages Engines software systems Lifting equipment Business Distributed computing User interfaces Graphical user interfaces

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A market-based scheduler for JXTA-based peer-to-peer computing system

A market-based scheduler for JXTA-based peer-to-peer computi...

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International Conference on Computational Science and its Applications, ICCSA 2004

作者： Ping, Tan Tien Sodhy, Gian Chand Yong, Chan Huah Haron, Fazilah Buyya, Rajkumar School of Computer Science Universiti Sains Malaysia Penang11800 Malaysia Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

ISBN: (纸本)3540220607

Peer-to-Peer (P2P) computing is said to be the next wave of computing after client-server and web-based computing. It provides an opportunity to harness a lot of idle peer-resources such as desktop computers across the Internet, for solving large-scale computing applications. Each peer is autonomous and it needs incentive for sustained contribution of its resources to P2P applications. In addition, a flexible and efficient job scheduling is needed to harvest the idle computing power as cheaply and economically as possible. This paper introduces an economic based job scheduler for mapping jobs to resources in P2P computing environment. The scheduler has been implemented with the Compute Power Market (CPM) system developed using Sun JXTA P2P technology. Our scheduler can be configured depending on users’ quality of service requirements such as the deadline and budget constraints. Our scheduler follows a hierarchy scheme. The design allows multiple consumers and multiple providers to schedule and run jobs. To allow wider support for a wide variety of applications, the system is designed to allow easy ‘plug in’ of user applications. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Personal computers

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A robust search-based approach to project management in the presence of abandonment, rework, error and uncertainty

A robust search-based approach to project management in the ...

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International Symposium on software Metrics

作者： G. Antoniol M. Di Penta M. Harman Department of Engineering RCOST-Research Centre on Software Technology University of Sannio Benevento Italy Department of Information Systems and Computing Brunei University Uxbridge UK

Managing a large software project involves initial estimates that may turn out to be erroneous or that might be expressed with some degree of uncertainty. Furthermore, as the project progresses, it often becomes necessary to rework some of the work packages that make up the overall project. Other work packages might have to be abandoned for a variety of reasons. In the presence of these difficulties, optimal allocation of staff to project teams and teams to work packages is far from trivial. This paper shows how genetic algorithms can be combined with a queuing simulation model to address these problems in a robust manner. A tandem genetic algorithm is used to search for the best sequence in which to process work packages and the best allocation of staff to project teams. The simulation model, that computes the project estimated completion date, guides the search. The possible impact of rework, abandonment and erroneous or uncertain initial estimates are characterised by separate error distributions. The paper presents results from the application of these techniques to data obtained from a large scale commercial software maintenance project.

关键词： Robustness Project management Uncertainty Packaging software maintenance Genetic algorithms Computer errors Computational modeling Application software Large-scale systems

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Search-based techniques for optimizing software project resource allocation

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3103卷 1425-1426页

作者： Antoniol, G. Di Penta, M. Harman, M. RCOST - Research Centre on Software Technology University of Sannio Department of Engineering Palazzo ex Poste Via Traiano 82100 Benevento Italy Department of Information Systems and Computing Brunel University Uxbridge Middlesex UB8 3PH United Kingdom

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Visual terrain mapping for Mars exploration

Visual terrain mapping for Mars exploration

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2004 IEEE Aerospace Conference Proceedings

作者： Olson, Clark F. Matthies, Larry H. Wright, John R. Li, Ron Di, Kaichang Computing and Software Systems University of Washington Bothell Box 358534 18115 Campus Way NE Bothell WA 98011-8246 United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena CA 91109-8099 United States Ohio State University Department of Civil Engineering 470 Hitchcock Hall 2070 Neil Avenue Columbus OH 43210-1275 United States

ISBN: (纸本)0780381556

One goal for future Mars missions is to navigate a rover to science targets not visible to the rover, but seen in orbital or descent images. In order to support and improve long-range navigation capabilities, we generate 3D terrain maps using all available images, including surface images from the lander and/or rover, descent images from the lander, and orbital images from current and future Mars orbiters. The techniques used include wide-baseline stereo mapping for terrain distant from the rover, bundle adjustment for high-accuracy mapping of surface images, and structure-from-motion techniques for mapping using descent and orbital images. The terrain maps are compiled using a system for unifying multi-resolution models and integrating three-dimensional terrains.

关键词： Martian surface analysis

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