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International symposium on high performance Distributed computing

作者： J. Villacis M. Govindaraju D. Stern A. Whitaker F. Breg P. Deuskar B. Temko D. Gannon R. Bramley Department of Computer Science Indiana University Bloomington IN USA Indiana University Bloomington Bloomington IN US

Grid systems, such as Globus, Legion and Globe, provide an infrastructure for implementing metacomputing over the Internet. the Component architecture Toolkit (CAT) provides a software layer above the grid that facili... 详细信息

关键词： Component architectures Application software Buildings Software tools Containers computer science Internet Metacomputing Resource management Hardware

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Analysis of HPSS performance based on per-file transfer logs

Analysis of HPSS performance based on per-file transfer logs

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IEEE symposium on Mass Storage Systems

作者： W. Schroeder R. Marciano J. Lopez M.K. Gleicher G. Kremenek C. Baru R. Moore San Diego Supercomputer Center San Diego CA USA

this paper analyses high performance storage system (HPSS) performance and, to a lesser extent, characterizes the San Diego Supercomputer Centre (SDSC) HPSS workload, utilizing per-file transfer logs. the performance examined includes disk cache hit rates, disk file open times, library tape mount times, manual tape mount times, transfer speeds and latencies. For workload characterization, we examine daily activity in terms of file counts for get and put, and total bytes transferred, as well as activity loads in 10-minute intervals. Our results largely confirm our expectations but provide more accurate and complete descriptions, with unexpected subtleties. the visual representations provide additional insights into the functioning of the system.

关键词： performance analysis Supercomputers Network servers Libraries Delay Software performance Environmental management computer architecture high-speed networks Weight control

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CORBA Based architecture for Large Scale Workflow 4

CORBA Based Architecture for Large Scale Workflow

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4th International symposium on Autonomous Decentralized Systems, ISADS 1999

作者： Filho, Roberto Silveira Silva Wainer, Jacques Madeira, Edmundo R.M. Ellis, Clarence IC -Institute of Computing UNICAMP - University of Campinas SP Campinas13081-970 Brazil Department of Computer Science University of Colorado BoulderCO80309 United States

ISBN: (纸本)0769501370

Standard client-server workflow management systems have an intrinsic scalability limitation: the central server is a bottleneck for large scale applications. It is also a single fault point that may disable the whole system. We propose a fully distributed architecture for workflow management systems. It is based on the idea that the case (an instance of the process) migrates from host to host, according to the process definition specification, as the corresponding activities are executed. this basic architecture is improved so that other requirements for Workflow Management Systems, besides scalability, are also contemplated. A CORBA-based implementation of such architecture is discussed, with both its limitations and positive points described. © 1999 Proceedings - 4th International symposium on Autonomous Decentralized Systems: Integration of Heterogeneous Systems, ISADS 1999. All rights reserved.

关键词： Common object request broker architecture (CORBA)

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11th IPPS/SPDP 1999 Workshops Held in Conjunction with the 13th International Parallel Processing symposium and 10th symposium on Parallel and Distributed Processing, 1999

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13th International Parallel Processing symposium, IPPS 1999 Held in Conjunction with the 10th symposium on Parallel and Distributed Processing, SPDP 1999

ISBN: (纸本)3540658319

the proceedings contain 137 papers. the special focus in this conference is on high-Level Parallel Programming Models and Supportive Environments. the topics include: Efficient program partitioning based communication;a flexible base for transparent shared memory programming models on clusters of PCs;flexible collective operations for distributed object groups;a framework for performance evaluation of scalable computing;recursive individually distributed objects;a flexible combination of on-stack execution and work-stealing;an automatic distribution front-end for java;concurrent language support for interoperable applications;on the distributed implementation of aggregate data structures by program transformation;a transformational framework for skeletal programs;implementing a non-strict functional programming language on a threaded architecture;the biological basis of the immune system as a model for intelligent agents;a formal definition of the phenomenon of collective intelligence and its IQ measure;implementation of data flow logical operations via self-assembly of DNA;a parallel hybrid evolutionary metaheuristic for the period vehicle routing problem;distributed scheduling with decomposed optimization criterion;a parallel genetic algorithm for task mapping on parallel machines;evolution-based scheduling of fault-tolerant programs on multiple processors;a genetic-based fault-tolerant routing strategy for multiprocessor networks;regularity considerations in instance-based locality optimization;parallel ant colonies for combinatorial optimization problems;an analysis of synchronous and asynchronous parallel distributed genetic algorithms with structured and panmictic islands and GA-based parallel image registration on parallel clusters.

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Resource co-allocation in computational grids

Resource co-allocation in computational grids

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International symposium on high performance Distributed computing

作者： K. Czajkowski I. Foster C. Kesselman Information Sciences Institute University of Southern California Marina del Rey CA USA Department of Computer Science University of Chicago Chicago IL USA Mathematics and Computer Science Division Argonne National Laboratory Argonne IL USA

Applications designed to execute on "computational grids" frequently require the simultaneous co-allocation of multiple resources in order to meet performance requirements. For example, several computers and network elements may be required in order to achieve real-time reconstruction of experimental data, while a large numerical simulation may require simultaneous access to multiple supercomputers. Motivated by these concerns, we have developed a general resource management architecture for Grid environments, in which resource co-allocation is an integral component. We examine the co-allocation problem in detail and present mechanisms that allow an application to guide resource selection during the co-allocation process; these mechanisms address issues relating to the allocation, monitoring, control, and configuration of distributed computations. We describe the implementation of co-allocators based on these mechanisms and present the results of microbenchmark studies and large-scale application experiments that provide insights into the costs and practical utility of our techniques.

关键词： Grid computing Resource management Application software computer networks Numerical simulation Supercomputers computer architecture Monitoring Distributed computing Large-scale systems

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Sophisticated hospital information system radiology information system picture archiving and communications system (PACS) integration in a large-scale traumatology PACS

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JOURNAL OF DIGITAL IMAGING 1999年第2期12卷 99-102页

作者： Peer, S Vogl, R Peer, R Jaschke, W Univ Innsbruck Hosp Dept Radiol A-6020 Innsbruck Austria

Picture archiving and communications system (PACS) in the context of an outpatient trauma care center asks for a high level of interaction between information systems to guarantee rapid image acquisition and distribution to the surgeon. During installation of the Innsbruck PACS, special aspects of traumatology had to be realized, such as imaging of unconscious patients without identification, and transferred to the electronic environment. Even with up-to-date PACS hardware and software, special solutions had to be developed in-house to tailor the PACS/hospital information system (HIS)/radiology information system (RIS) interface to the needs of radiologic and clinical users, An ongoing workflow evaluation is needed to realize the needs of radiolgists and clinicians. these needs have to be realized within a commercially available PACS, whereby full integration of information systems may sometimes only be achieved by special in-house solutions. Copyright (C) 1999 by W.B. Saunders Company.

关键词：门诊医疗设施/组织和管理计算机通信网络计算机系统医院信息系统/组织和管理医务人员病人识别系统放射学放射学信息系统/组织和管理软件系统综合创伤诊治中心/组织和管理意识丧失人类

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Proceedings - 12th symposium on Integrated Circuits and Systems Design, SBCCI 1999

Proceedings - 12th Symposium on Integrated Circuits and Syst...

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12th Brazilian symposium on Integrated Circuits and Systems Design, SBCCI 1999

ISBN: (纸本)076950387X

the proceedings contain 47 papers. the topics discussed include: micro-architecture estimation of the useless power consumption of a high-performance processor;advanced compact model for the charges and capacitances of short-channel MOS transistors;conductances and. noise in trapezoidal association of transistors for analog applications using a SOT methodology;estimating functional unit number in the PISH codesign system by using Petri nets;hardware/software specification, design and test using a system level approach;a multi-functional cell for CMOS analog applications in low-voltage;odd-order current-mode low-pass filters with finite zeros;an approach for interface generation in the PISH co-design system;interface design and refinement using state based techniques;register files constraint satisfaction during scheduling of DSP code;a binary-tree arcqitecture for scheduling real-time systems with hard and soft tasks;an 0.25μm CMOS injection locked 5.6GB/S clock and data recovery cell;an 9-bit parallel pipelined multiplier based on the 3-bit recoding from Booth's algorithm;MCA: a single chip one-port scalable ATM layer controller;circuit-level considerations for mixed signals programmable components;a low sensitivity switched-capacitor filter design with testability features;reusing hardware components with single-state processes;logic and high level synthesis for communication protocols;fast hardware compilation of behaviors into an FPGA-based dynamic reconfigurable computing systems;and effects of radiation on digital architectures: one year results from a satellite experiment.

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Toward a common component architecture for high-performance scientific computing

Toward a common component architecture for high-performance ...

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International symposium on high performance Distributed computing

作者： R. Armstrong D. Gannon A. Geist K. Keahey S. Kohn L. McInnes S. Parker B. Smolinski Sandia National Laboratories USA Oak Ridge National Laboratory USA Advanced Computing Laboratory Los Alamos National Laboratory USA Center for Applied Scientific Computing Lawrence Livemore National Laboratory USA Mathematics and Computer Science Division Argonne National Laboratory USA Department of Computer Science University of Utah USA

Describes work in progress to develop a standard for interoperability among high-performance scientific components. this research stems from the growing recognition that the scientific community needs to better manage the complexity of multidisciplinary simulations and better address scalable performance issues on parallel and distributed architectures. the driving force for this is the need for fast connections among components that perform numerically intensive work and for parallel collective interactions among components that use multiple processes or threads. this paper focuses on the areas we believe are most crucial in this context, namely an interface definition language that supports scientific abstractions for specifying component interfaces and a port connection model for specifying component interactions.

关键词： Component architectures Scientific computing Laboratories Object oriented modeling computer science Parallel programming Yarn Context modeling Software systems Mathematics

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Tolerating late memory traps in ILP processors

Tolerating late memory traps in ILP processors

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Annual International symposium on computer architecture, ISCA

作者： Xiaqang Qiu M. Dubois Department of Electrical Engineering-Systems University of Southern California Los Angeles CA USA

ILP processors can execute a large number of instructions at the same time. thus it becomes more and more difficult to support traps efficiently. On the other hand a current trend in architecture is to support various memory functions in software rather than hardware, usually by trapping the execution processor on a cache miss, TLB miss or a failed access to a local or remote memory. these late memory traps block the faulty instruction at the top of the active list, backing up the pipeline. Moreover the support for late memory traps may affect the performance of non-faulting memory instructions as well. In this paper we analyze the overhead caused by late memory traps in ILP processors and define several measures for this overhead. In order to tolerate late memory traps, we propose hardware prefetching of exception conditions and a tagged store buffer to implement deferred traps on stores. We show that, with these hardware optimizations, the overhead added by the lateness of traps is significantly reduced relative to the overhead of early traps. Because of caching effects the frequency of late memory traps usually decreases as they are taken deeper in the memory hierarchy and their overall impact on the execution time becomes negligible.

关键词： Concurrent computing high performance computing computer aided instruction Distributed computing computer architecture computer languages Parallel processing Software performance Writing

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A network-aware distributed storage cache for data intensive environments

A network-aware distributed storage cache for data intensive...

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International symposium on high performance Distributed computing

作者： B.L. Tierney J. Lee B. Crowley M. Holding J. Hylton F.L. Drake Computing Sciences Directorate Lawrence Berkeley National Laboratory University of California Berkeley CA USA Corporation of National Research Initiatives Reston VA USA

Modern scientific computing involves organizing, moving, visualizing, and analyzing massive amounts of data at multiple sites around the world. the technologies, the middleware services, and the architectures that are used to build useful high-speed, wide area distributed systems, constitute the field of data intensive computing. We describe an architecture for data intensive applications where we use a high-speed distributed data cache as a common element for all of the sources and sinks of data. this cache-based approach provides standard interfaces to a large, application-oriented, distributed, on-line, transient storage system. We describe our implementation of this cache, how we have made it "network aware ", and how we do dynamic load balancing based on the current network conditions. We also show large increases in application throughput by access to knowledge of the network conditions.

关键词： Cache storage computer architecture Streaming media Medical services high-speed networks Grid computing Middleware Laboratories Research initiatives Distributed computing

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