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检索条件"任意字段=13th IEEE International Symposium on Parallel and Distributed Processing with Applications"

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RAPID: An end-system aware protocol for intelligent data transfer over lambda grids 20

RAPID: An end-system aware protocol for intelligent data tra...

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20th ieee international parallel and distributed processing symposium, IPDPS 2006

作者： Banerjee, Amitabha Feng, Wu-Chun Mukherjee, Biswanath Ghosal, Dipak University of California Davis Dept. of Computer Science Davis CA 95616 United States Virginia Tech. Dept. of Computer Science Blacksburg VA 24061 United States

ISBN: (纸本)1424400546

Next-generation e-Science applications will require the ability to transfer information at high data rates between distributed computing centers and data repositories. To support such applications, lambda grid networks have been built to provide large, on-demand bandwidth between end-points that are interconnected via optical circuit-switched lambdas. It is extremely important to develop an efficient transport protocol over such high-capacity, dedicated circuits. Because lambdas provide dedicated bandwidth between endpoints, they obviate the need for network congestion control. Consequently, past research has demonstrated that rate-based transport protocols, such as RBUDP, are more effective than TCP in transferring data over lambdas. However, while lambdas eliminate congestion in the network, they ultimately push the congestion to the endpoints - congestion that current rate-based transport protocols are ill-suited to handle. In this paper we introduce a "Rate-Adaptive, Protocol for Intelligent Delivery (RAPID)" of data that is lightweight and end-system performance-aware, so as to maximize end-to-end throughput while minimizing packet loss. Based on self monitoring of the dynamic task-priority at the receiving end-system, our protocol enables the receiver to proactively deliver feedback to the sender, so that the sender may adapt its sending rate to avoid congestion at the receiving end-system. this avoids large bursts of packet losses typically observed in current rate-based transport protocols. Over a 10-Gigabit link emulation of an optical circuit, RAPID reduces file-transfer time, and hence improves end-to-end throughput by as much as 25%. © 2006 ieee.

关键词： distributed computer systems

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A simulation study of the effects of multi-path approaches in e-Commerce applications 20

A simulation study of the effects of multi-path approaches i...

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20th ieee international parallel and distributed processing symposium, IPDPS 2006

作者： Romano, Paolo Quaglia, Francesco Ciciani, Bruno Dipartimento di Informatica e Sistemistica Università di Roma La Sapienza Via Salaria 113 00198 Roma Italy

ISBN: (纸本)1424400546

Response time is a key factor of any e-Commerce application, and a set of solutions have been proposed to provide low response time despite network congestions or failures. Being them mostly based on caching of Web objects and replication of DBMS managed data at the edges, or at intermediate points, of the Web infrastructure, they reveal effective when handling client requests only performing read access to application data. However, any update request typically needs to be redirected to the origin DBMSs, hence not taking advantage from data replication and related client proximity. In order to alleviate the effects of network congestions or failures, we have proposed a multi-path protocol that increases the likelihood for the update request to be processed along a responsive (e.g. failure free) network path in between the client location and the origin DBMS sites. In this paper we present an extensive simulation study of the effects of such a multi-path approach on the client perceived response time. the study relies on both Brite generated network topologies and the NLANR graph. Also, well known realistic TCP models are used to capture the effects of network delays during both normal and anomalous (i.e. packet loss affected) operation mode. © 2006 ieee.

关键词： Electronic commerce

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DotGrid: ***-based infrastructure for global Grid computing

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6th ieee international symposium on Cluster Computing and the Grid, 2006. CCGRID 06

作者： Poshtkuhi, Alireza Abutalebi, Ali Haj Ayough, Leila Mahmoudi Hessabi, Shaahin Islamic Azad University Qazvin Branch Iran Microelectronics Research and Design Center of IRAN Iran Dept. of Computer Engineering Sharif University of Technology Iran

ISBN: (纸本)0769525857

Recently, Grid infrastructures have provided wide integrated use of resources. DotGrid intends to introduce required Grid services and toolkits that are implemented as a layer wrapped over the existing operating systems. Our DotGrid has been developed based on Microsoft .NET in Windows and MONO .NET in Linux and UNIX. Using DotGrid APIs, Grid middlewares and applications can be implemented easily. We evaluated our DotGrid capabilities by implementing some applications including a grid-based distributed cryptographic engine and also a typical computational problem. © 2006 ieee.

关键词： parallel processing systems

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Exploiting processing locality through paging configurations in multitasked reconfigurable systems 20

Exploiting processing locality through paging configurations...

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20th ieee international parallel and distributed processing symposium, IPDPS 2006

作者： Taher, Mohamed El-Ghazawi, Tarek George Washington University United States

ISBN: (纸本)1424400546

FPGA chips in reconfigurable computer systems are used as malleable coprocessors where components of a hardware library of functions can be configured as needed. As the number of hardware functions to be configured typically exceeds the underlying chip area during the execution of an application, previous efforts have introduced configuration caching. those efforts, however, have focused on two run-time-reconfiguration scenarios, which consider a single application running on the reconfigurable system. In the full reconfiguration scenario, functions of an application are arranged into blocks each of which has enough functions to fill the entire chip. the blocks are configured in a deterministic sequence needed by the application based on the a priori knowledge about the application. In the partial reconfiguration scenario, each function is configured or replaced on a function-by-function basis, based on the application needs. In the former technique, spatial processing locality is well exploited. In the latter, only temporal processing locality is exploited. In this work, we propose a technique suitable for multitasking and for cases of single applications that can change the course of processing in a non-deterministic fashion based on data. In order to exploit processing locality, both spatial and temporal simultaneously, the proposed model groups hardware functions into hardware configuration blocks (pages) of fixed size, where multiple pages can be configured on a chip simultaneously. By grouping only related functions that are typically requested together, processing spatial locality can be exploited. Temporal locality is exploited through page replacement techniques. Data mining techniques were used to group related functions into pages. Standard, replacement algorithms as those found in caching were considered. Simulations, as well as emulation using the Cray XD1 reconfigurable high-performance computer were used in the experimental study. the results show a s

关键词： Multitasking

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Large scale distributed simulation on the Grid

Large scale distributed simulation on the Grid

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6th ieee international symposium on Cluster Computing and the Grid, 2006. CCGRID 06

作者： theodoropoulos, Georgios Zhang, Yi Chen, Dan Minson, Rob Turner, Stephen J. Cai, Wentong Xie, Yong Logan, Brian University of Birmingham Edgbaston Birmingham B15 2TT United Kingdom School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore Computing Laboratory Oxford University Oxford OX1 3QD United Kingdom School of Computer Science and Information Technology University of Nottingham Nottingham NG8 1BB United Kingdom

ISBN: (纸本)0769525857

the development of many complex simulation applications requires collaborative effort from researchers with different domain knowledge and expertise, possibly at different locations. these simulation systems often require huge computing resources and data sets, which may be geographically distributed. In order to support collaborative model development and to cater for the increasing complexity of such systems, it is necessary to harness distributed resources over the Internet. the emergence of Grid technologies provide exciting new opportunities for large scale distributed simulation, enabling collaboration and the use of distributed computing resources, while also facilitating access to geographically distributed data sets. this paper discusses the research challenges that must be addressed before these opportunities can he exploited and presents HLA_GRID_REPAST, a system for executing large scale distributed simulations of agent based systems over the Grid. © 2006 ieee.

关键词： parallel processing systems

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MegaProto/E: Power-aware high-performance cluster with commodity technology 20

MegaProto/E: Power-aware high-performance cluster with commo...

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20th ieee international parallel and distributed processing symposium, IPDPS 2006

作者： Boku, Taisuke Sato, Mitsuhisa Takahashi, Daisuke Nakashima, Hiroshi Nakamura, Hiroshi Matsuoka, Satoshi Hotta, Yoshihiko University of Tsukuba Japan Toyohashi University of Technology Japan University of Tokyo Japan Tokyo Institute of Technology Japan

ISBN: (纸本)1424400546

In our research project named "Mega-Scale Computing Based on Low-Power Technology and Workload Modeling", we have been developing a prototype cluster not based on ASIC or FPGA but instead only using commodity technology. Its packaging is extremely compact and dense, and its performance/power ratio is very high. Our previous prototype system named "MegaProto" demonstrated that one cluster unit, which consists of 16 commodity low-power processors, can be successfully implemented on just 1U height chassis and it is capable of up to 2.8 times higher performance/power ratio than ordinary high-performance dual-Xeon 1U server units. We have improved MegaProto by replacing the CPU and enhancing the I/O performance. the new cluster unit named "MegaProto/E" with 16 Transmeta Efficeon processors achieves 32 GFlops of peak performance, which is 2.2-fold greater than that of the original one. the cluster unit is equipped with an independent dual network of Gigabit Ethernet, including dual 24-port switches. the maximum power consumption of the cluster unit is 320 W, which is comparable with that of today's high-end PC servers for high performance clusters. Performance evaluation using NPB kernels and HPL shows that the performance of MegaProto/E exceeds that of a dual-Xeon server in all the benchmarks, and its performance ratio ranges from 1.3 to 3.7. these results reveal that our solution of implementing a number of ultra low-power processors in compact packaging is an excellent way to achieve extremely high performance in applications with a certain degree of parallelism. We are now building a multi-unit cluster with 128 CPUs (8 units) to prove that this advantage still holds with higher scalability. © 2006 ieee.

关键词： parallel processing systems

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Analysis of jobs in a multi-organizational Grid test-bed

Analysis of jobs in a multi-organizational Grid test-bed

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6th ieee international symposium on Cluster Computing and the Grid, 2006. CCGRID 06

作者： Lee, Bu-Sung Tang, Ming Zhang, Junwei Soon, Ong Yew Zheng, Cindy Arzberger, Peter Abramson, David School of Computer Engineering Nanyang Technological University Singapore Singapore San Diego Supercomputer Center United States Faculty of Information Technology Monash University Australia

ISBN: (纸本)0769525857

the inevitable move from a single large scale server to a distributed Grid environment is beginning to be realized across international Grid test-bed like Pacific Rim applications and Grid Middleware Assembly (PRAGMA). Although jobs submitted to a single large server have been widely analyzed, job characteristics in a Grid environment are different as we found in our analysis of jobs submitted in the PRAGMA Grid test-bed. this paper reports on the analysis of jobs submitted across the PRAGMA Grid test-bed. the job types are categorized and the runtime of jobs is captured, using the Multi-Organization Grid Accounting System (MOGAS), and analyzed. the number of jobs submitted across organizations, indicating the level of resource sharing among participants, is also captured by the system. © 2006 ieee.

关键词： parallel processing systems

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A systematic multi-step methodology for performance analysis of communication traces of distributed applications based on hierarchical clustering 06

A systematic multi-step methodology for performance analysis...

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international symposium on parallel and distributed processing (IPDPS)

作者： G. Aguilera P.J. Teller M. Taufer F. Wolf University of Texas El Paso El Paso TX USA Forschungszentrum Jülich (KFA) Julich Germany

ISBN: (纸本)9781424400546

Often parallel scientific applications are instrumented and traces are collected and analyzed to identify processes with performance problems or operations that cause delays in program execution. the execution of instrumented codes may generate large amounts of performance data, and the collection, storage, and analysis of such traces are time and space demanding. To address this problem, this paper presents an efficient, systematic, multi-step methodology, based on hierarchical clustering, for analysis of communication traces of parallel scientific applications. the methodology is used to discover potential communication performance problems of three applications: TRACE, REMO, and SWEEP3D

关键词： Performance analysis Instruments parallel processing Monitoring Counting circuits Delay Statistical analysis Data analysis parallel algorithms Large-scale systems

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A distributed object system approach for dynamic reconfiguration 06

A distributed object system approach for dynamic reconfigura...

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international symposium on parallel and distributed processing (IPDPS)

作者： R. Hecht S. Kubisch H. Michelsen E. Zeeb D. Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock-Warnemunde Germany

ISBN: (纸本)9781424400546

Managing reconfigurable hardware resources at runtime is expected to be a new task for future operating systems. But due to the mixture of parallel and sequential parts of dynamically reconfigurable applications, it is not entirely clear so far, how to use and to program such systems. A new interpretation of dynamically reconfigurable applications is presented. It is shown, that the parallel computing concept of distributed object systems may be adapted for dynamically reconfigurable architectures. this approach answers many open questions concerning communication, interruption, and relocation of reconfigurable modules. It is explored by means of an extended Linux operating system in conjunction with a SystemC model of a dynamically reconfigurable FPGA

关键词： Hardware Operating systems Network-on-a-chip Field programmable gate arrays parallel processing Linux Object oriented modeling Application software System-on-a-chip Dynamic programming

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Execution and composition of e-science applications using the WS-resource construct 06

Execution and composition of e-science applications using th...

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international symposium on parallel and distributed processing (IPDPS)

作者： E. Floros Y. Cotronis Department of Informatics and Telecommunications Panepistimiopolis National and Kapodistrian University of Athens Athens Greece

ISBN: (纸本)9781424400546

Service oriented architectures are emerging as the recommended paradigm for developing dispersed e-science environments. In this paper we analyze the characteristics and requirements of a common class of scientific applications, namely computational simulation models, and define a generic service-oriented framework for their execution and composition. Finally we present the work done so far towards the implementation of such framework based on the WSRF set of specifications and the Globus toolkit

关键词： Web services Service oriented architecture Object oriented modeling Computational modeling Grid computing Informatics Computer applications Telecommunication computing Analytical models Computer architecture

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