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检索条件"任意字段=Proceedings of the IEEE Workshop on Advances in Parallel and Distributed Systems"

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The next generation software workshop - IPDPS'07

The next generation software workshop - IPDPS'07

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21st International parallel and distributed Processing Symposium, IPDPS 2007

作者： Darema, Frederica Computer and Information Science and Engineering Directorate National Science Foundation Arlington VA 22230

ISBN: (纸本)1424409101

This workshop provides a forum for an overview, project presentations, and discussion of the research fostered and funded initially by the NSF Next Generation Software (NGS) Program, and more recently through the Advanced Execution systems (AES) and the systems Modeling and Analysis (SMA) components of the follow-up Computer systems Research (CSR) Program1. The present workshop is part of the series of the Next Generation Software workshops that have been conducted since 2001, on a yearly basis and in conjunction with IPDPS. The topics addressed in the workshop are on research in systems' software technology in the scope of NGS and of the AES and the SMA components, namely: methods for systems modeling and analysis, performance engineering, dependability, fault tolerance, and power-management, programming environments, enhanced compiler capabilities, tools for the development, dynamic runtime support and dynamic composition of complex applications executing on heterogeneous, parallel and distributed computing platform assemblies, such as computational grids, encompassing, advanced multiprocessing nodes, midrange and high-end platforms, clusters, embedded and sensor systems, and special purpose processing systems. © 2007 ieee.

关键词： Technical presentations

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parallel simulation of hybrid network traffic models 07

Parallel simulation of hybrid network traffic models

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21st International workshop on Principles of Advanced and distributed Simulation (PADS 2007)

作者： Liu, Jason Colorado Sch Mines Dept Math & Comp Sci Golden CO 80401 USA

ISBN: (纸本)9780769528984

We examine a parallel processing method for simulations of large-scale networks with a hybrid traffic representation combining both a time-stepped fluid model and a discrete-event packet-oriented model. This method benefits from the observation that the time it takes to propagate-fluid characteristics along the path taken by the traffic flows has a lower bound equal to the minimum link delay as manifested by the governing ordinary differential equations (ODEs). A better lookahead can thus be used to allow parallel simulation of the hybrid model to run without more synchronization overhead than the corresponding discrete-event packet-oriented model. We derive an analytical model comparing the fluid model and the packet-oriented model both for sequential and parallel simulations. We demonstrate the benefit of the parallel hybrid model through a series of simulation experiments of a large-scale network consisting of over 170,000 hosts and 1.6 million traffic flows on a small parallel cluster.

关键词： Telecommunication traffic Traffic control Computational modeling Computer simulation Discrete event simulation Computer networks Large-scale systems Differential equations Fluid flow Concurrent computing

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proceedings of the 5th ieee workshop on Challenges of Large Applications in distributed Environments, CLADE'07

Proceedings of the 5th IEEE Workshop on Challenges of Large ...

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16th International Symposium on High Performance distributed Computing 2007, HPDC'07 and Co-Located workshops

ISBN: (纸本)1595937145

The proceedings contain 5 papers. The topics discussed include: enabling rapid development of parallel tree search applications;challenges in executing large parameter sweep studies across widely distributed computing environments;hyperscaling of plasma turbulence simulations in DEISA;WISDOM-II: a large in silico docking effort for finding novel hits against malaria using computational grid infrastructure;and efficient processing of pathological images using the grid: computer-aided prognosis of neuroblastoma.

关键词： distributed computer systems

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Recent advances in trusted grids and peer-to-peer computing systems

Recent advances in trusted grids and peer-to-peer computing ...

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21st International parallel and distributed Processing Symposium, IPDPS 2007

作者： Hwang, Kai University of Southern California Los Angeles CA 90089 United States Department of Electrical Engineering and Computer Science Internet and Grid Research Laboratory University of Southern California

ISBN: (纸本)1424409101

Computational Grids and peer-to-peer (P2P) are emerging as two of the most promising distributed computing technologies that may change the world in the next decade. In this talk, Dr. Hwang presents recent advances in network security technologies, cyber trust systems, and integrated solutions for trusted computing over the Internet. The talk covers the integration of web services with P2P Grid computing, new cybertrust models, Internet worm containment, P2P reputation systems, and hybrid defense systems to protect distributed resources from network worms, DDoS attacks or peer intrusions or collusions. Research findings and benchmark results from the USC GridSec project will be reported for automated trust management to facilitate security binding and defense against worms and DDoS attacks in Grids, P2P systems, and web services. He will assess frontier research topics on fast reputation aggregation for trusted P2P file sharing, security-aware Grid job scheduling, game-theoretic modeling of non-cooperative Grids, new performance metrics, and DETER experiments for cybertrust development. The fortified Grids, P2P systems, and Internet resources will benefit many security-sensitive applications in digital government, e-commerce, distance learning, distributed supercomputing, etc. ©2007 ieee.

关键词： Grid computing

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Local Time Warp: An implementation and performance analysis 07

Local Time Warp: An implementation and performance analysis

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21st International workshop on Principles of Advanced and distributed Simulation (PADS 2007)

作者： Rajaei, Hassan Bowling Green State Univ Dept Comp Sci Bowling Green OH 43403 USA

ISBN: (纸本)9780769528984

The Local Time Warp (LTW) model was one of the novel approaches to distributed simulation presented in early 90s. While several similar schemes had emerged afterwards, no implementation and performance analysis of LTW were offered. This paper provides an implementation and performance analysis of the Local Time Warp model on a Beowulf Cluster using Message Passing Interface (MPI). Cluster computing matches well with the Local Time Warp model due to its partitioning of the simulation entities and assigning them to clusters of processors. This paper presents a distributed simulation engine called BG-LTW which is a clustered-based implementation of the model. Further, the implementation features and its performance are provided. The obtained results suggest that for large-scale simulations local time warp outperforms its global counterpart.

关键词： Performance analysis Object oriented modeling Computational modeling Time warp simulation Engines parallel processing Large-scale systems Protocols Grid computing Computer science

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A robust PDE solver for the 3D Stokes/Navier-Stokes systems on the grid environment 07

A robust PDE solver for the 3D Stokes/Navier-Stokes systems ...

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8th ieee/ACM International Conference on Grid Computing

作者： Yang, Huidong Zulehner, Walter Langer, Ulrich Baumgartner, Markus Johannes Kepler Univ Linz Inst Computat Math Altenbergstr 69 A-4040 Linz Austria Johannes Kepler Univ Linz Inst Graph & Parallel Proc A-4040 Linz Austria

ISBN: (纸本)9781424415595

Since grid computing provides users with more distributed computing and storage resources, it gives us an opportunity to design new efficient and robust solvers for the numerical solutions of partial differential equations (PDEs). For instance, large scale problems in computational fluid dynamics (CFD) can be efficiently simulated under this environment. However, unfortunately, most of the currently developed PDE solvers using the finite element method (FEM), usually tight combinations of a mesh generator and a linear system solver, are not qualified for the grid computing environment. In this paper, based on principles of grid computing, we present a grid-enabled Client/Server model for solving the Stokes/(incompressible) Navier-Stokes system in 3D.

关键词： Robustness Grid computing Computational fluid dynamics distributed computing Partial differential equations Large-scale systems Computational modeling Finite element methods Mesh generation Linear systems

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A scalable framework for parallel discrete event simulations on desktop Grids 07

A scalable framework for parallel discrete event simulations...

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8th ieee/ACM International Conference on Grid Computing

作者： Park, Alfred Fujimoto, Richard Georgia Inst Technol Coll Comp Comp Sci & Engn Div 266 Ferst Dr Atlanta GA 30332 USA

ISBN: (纸本)9781424415595

Utilizing desktop grid infrastructures is challenging for parallel discrete event simulation (PDES) codes due to characteristics such as inter-process messaging, restricted execution, and overall lower concurrency than typical volunteer computing projects. The Aurora2 system uses an approach that simultaneously provides both replicated execution support and scalable performance of PDES applications through public resource computing. This is accomplished through a multi-threaded distributed back-end system, low overhead communications middleware, and an efficient client implementation. This paper describes the Aurora2 architecture and issues pertinent to PDES executions in a desktop grid environment that must be addressed when distributing back-end services across multiple machines. We quantify improvement over the first generation Aurora system through a comparative performance study detailing PDES programs with various scalability characteristics for execution over desktop grids.

关键词： Discrete event simulation distributed computing Concurrent computing Grid computing Middleware Computational modeling Computer applications Large-scale systems Educational institutions Drives

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GPU-accelerated evaluation platform for high fidelity network modeling 07

GPU-accelerated evaluation platform for high fidelity networ...

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21st International workshop on Principles of Advanced and distributed Simulation (PADS 2007)

作者： Xu, Zhiguo Bagrodia, Rajive Univ Calif Los Angeles Dept Comp Sci Mobile Syst Lab Los Angeles CA 90024 USA

ISBN: (纸本)9780769528984

High-fidelity simulations of mixed wired and wireless network systems are dependent on detailed simulation models, especially in the lower layers of the network stack. However detailed modeling can result in prohibitive computation cost. In recent years, commercial graphics cards (GPUs) have drawn attention from the general computing community due to the superior computation capability. In this paper we present our experience with using commercial graphics cards to speed up execution of network simulation models. First, we propose a general simulation framework supporting GPU-accelerated simulation models. Software abstraction is designed to facilitate the use and development of GPU-based models. Second, we implement and evaluate two simulation models using GPUs. We observed that using the GPUs can yield significant performance improvements for large configurations of the model, as compared with pure CPU-based computations, with no degradation in the accuracy of the results. This benefit is particularly impressive for models that include significant data parallel computations. However we also observed that the overhead introduced by GPUs make them less effective in improving execution time of other net-work models. This study suggests that besides parallel computing and grid computing, network simulations can also be scaled by reaping computation capability of GPUs and, potentially, other external computational hardware.

关键词： Computational modeling Concurrent computing Grid computing Graphics Computer networks Wireless networks Computational efficiency Software design Degradation parallel processing

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proceedings of the 2007 workshop on Service-Oriented Computing Performance: Aspects, Issues, and Approaches, SOCP'07

Proceedings of the 2007 Workshop on Service-Oriented Computi...

引用

16th International Symposium on High Performance distributed Computing 2007, HPDC'07 and Co-Located workshops

ISBN: (纸本)159593717X

The proceedings contain 10 papers. The topics discussed include: a QoS-based selection approach of autonomic grid services;approaching a parallelized XML parser optimized for multi-coreprocessors;benefits of alternate XML serialization formats in scientific computing;parallel XML processing by work stealing;comparing semantic registries: OWLJessKB and InstanceStore;SISC: providing efficient XML-based service-orientation for core OS functionality;empowering distributed workflow with the data capacitor: maximizing lustre performance across the wide area network;data transfer performance issues for a web services interface to synchrotron experiments;and comparing the use of bayesian networks and neural networks in response time modeling for service-oriented systems.

关键词： Quality of service

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Dynamic, context-aware, least-privilege Grid delegation 07

Dynamic, context-aware, least-privilege Grid delegation

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8th ieee/ACM International Conference on Grid Computing

作者： Ahsant, Mehran Basney, Jim Johnsson, Lennart Royal Inst Technol Ctr Parallel Comp Valhallavagn 79 S-10044 Stockholm Sweden Univ Illinois Natl Ctr Supercomp Appl Urbana IL 61801 USA

ISBN: (纸本)9781424415595

Performing delegation in large scale, dynamic and distributed environments with large numbers of shared resources is more challenging than inside local administrative domains. In dynamic environments like Grids, on one hand, delegating a restricted set of rights reduces exposure to attack but also limits the flexibility and dynamism of the application;on the other hand, delegating all rights provides maximum flexibility but increases exposure. This issue has not yet been adequately addressed by current Grid security mechanisms and is becoming a very challenging and crucial issue for future Grid development. Therefore, providing an effective delegation mechanism which meets the requirements of the least privilege principle is becoming an essential need. Furthermore, we are witnessing a phenomenal increase in the automation of organizational tasks and decision making, as well as the computerization of information related services, requiring automated delegation mechanisms. In order to meet these requirements we introduce an Active Delegation Framework which extends our previous work on on-demand delegation, making it context-aware. The framework provides a just-in-time, restricted and dynamic delegation mechanism for Grids. In this paper we describe the development of this framework and its implementation and integration with the Globus Toolkit.

关键词： Concurrent computing distributed computing Grid computing Application software Large-scale systems Automation Decision making Resource management Information security Runtime

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