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检索条件"任意字段=International Symposium on Software Engineering for Parallel and Distributed Systems"

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GenWrapper: A generic wrapper for running legacy applications on desktop grids

GenWrapper: A generic wrapper for running legacy application...

引用

international symposium on parallel and distributed Processing (IPDPS)

作者： Attila Csaba Marosi Zoltan Balaton Peter Kacsuk MTA SZTAKI Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

Desktop grids represent an alternative trend in grid computing using the same software infrastructure as volunteer computing projects, such as BOINC. Applications to be deployed on a BOINC infrastructure need special preparations. However, there are many legacy applications, that have either no source code available or would require too much effort to port. For these applications BOINC provides a wrapper. This wrapper can handle the simple cases and it is configurable, but it can only be used to execute a list of legacy executables (tasks) one after the other. GenWrapper aims to provide a generic solution for wrapping and executing an arbitrary set of legacy applications by utilizing a POSIX like shell scripting environment to describe how the application is to be run and how the work unit should be processed. This is realized by an extended version of BusyBox providing the most common UNIX commands and a POSIX shell interpreter in a single executable with a special applet (BusyBox extension) to make BOINC API functions accessible from the shell on Windows, Linux and Mac OS X platforms. In this paper we present how GenWrapper works and how it can be used to port legacy applications to desktop grid systems.

关键词： Grid computing Application software Wrapping Linux Automation Computer architecture Assembly Middleware XML Ash

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A New Cloaking Method Supporting both K-anonymity and L-diversity for Privacy Protection in Location-Based Service

A New Cloaking Method Supporting both K-anonymity and L-dive...

引用

international symposium on parallel and distributed Processing with Applications, ISPA

作者： Jung-Ho Um Mi-Young Jang Kyoung-Jin Jo Jae-Woo Chan Dept. of Computer Engineering Chonbuk National Univ. Chonju Chonbuk South Korea Chonbuk National University Jeonju Jeollabuk-do KR

In location-based services (LBSs), users send location-based queries to LBS servers along with their exact locations, but the location information of the users can be misused by adversaries. In this regard, there must be a mechanism which can deal with the privacy protection of the users. In this paper, we propose a cloaking method considering both K-anonymity and L-diversity. Our cloaking method creates a minimum cloaking region by finding L number of buildings (L-diversity) and then finds K number of users (K-anonymity). To support it, we use R*-tree based index structures as well as efficient filtering techniques to generate a minimum cloaking region. Finally, we show from our performance analysis that our cloaking method outperforms the existing grid-based cloaking method in terms of the size of cloaking regions and cloaking region creation time.

关键词： Privacy Protection Buildings Filtering Performance analysis Databases distributed processing Application software Concurrent computing distributed computing

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A Heuristic for Mapping Virtual Machines and Links in Emulation Testbeds

A Heuristic for Mapping Virtual Machines and Links in Emulat...

引用

international Conference on parallel Processing (ICPP)

作者： Rodrigo N. Calheiros Rajkumar Buyya César A.F. De Rose Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

distributed system emulators provide a paramount platform for testing of network protocols and distributed applications in clusters and networks of workstations. However, to allow testers to benefit from these systems, it is necessary an efficient and automatic mapping of hundreds, or even thousands, of virtual nodes to physical hosts-and the mapping of the virtual links between guests to physical paths in the physical environment. In this paper we present a heuristic to map both virtual machines to hosts and virtual links between virtual machines to paths in the real system. We define the problem we are addressing, present the solution for it and evaluate it in different usage scenarios.

关键词： Virtual machining System testing Switches Grid computing Network topology Cloud computing software testing LAN emulation Wide area networks parallel processing

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Identifying Useless States in Non-FIFO distributed Computations by Using Pseudo Timestamps

Identifying Useless States in Non-FIFO Distributed Computati...

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international symposium on parallel Architectures, Algorithms and Networks (ISPAN)

作者： Lung-Pin Chen Meng-Yuan Ho Jhen-You Hong Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan

In a distributed system, a monitor process collects the execution states and invokes a detection procedure to test and debug the program. This paper investigates the global state analyzing problems for the non-FIFO distributed environments. In this paper, the states unknown to the monitor process are represented by using the pseudo states. Based on this technique, this paper develops an algorithm capable of identifying the maximum number of useless states for the programs run in an non-FIFO distributed environment.

关键词： distributed computing System testing Debugging Computer networks Pervasive computing Computer science Computerized monitoring Detection algorithms Acceleration Logic testing

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An Extended Model for Active Rule Condition Evaluation of Spatial Database

An Extended Model for Active Rule Condition Evaluation of Sp...

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ACIS international Conference on software engineering, Artificial Intelligence, Networking, and parallel/distributed Computing (SNPD)

作者： Wei Xiong Ning Jing Hong-sheng Chen Luo Chen School of Electronics Science and Engineering National University of Defense Technology Changsha China

With more and more applications of spatial data, a great demand on business rules related to spatial information emerges. Active rule integrated into spatial database can be used to implement not only integrity constraint but also various business rules. Condition matching for active rule is critical to the efficiency of rules execution. However the active rule of spatial database is quite different from that of relational database, so the existing models cannot be directly introduced into spatial database to gain the same efficiency. In this paper, traditional condition evaluation model, rule discrimination network (RDN) is improved. Combined algebra optimization of spatial query with spatial operator migration, we propose an extended spatial rule discrimination network (ESRDN) as an efficient condition evaluation model for active rule of spatial database. Some heuristic optimization rules of ESRDN are presented and proved. At last a cost model is presented to assess the efficiency of the model we proposed, and experiment is used to illustrate the optimized results of ESRDN.

关键词： Spatial databases Relational databases Algebra Cost function Geographic Information systems Optimization methods software engineering Artificial intelligence Deductive databases Intelligent networks

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Dependable QoS support in Mesh Networks

Dependable QoS support in Mesh Networks

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international symposium on parallel and distributed Processing (IPDPS)

作者： M. Fazio M. Paone D. Bruneo A. Puliafito Faculty of Engineering University of Messina Messina Italy

Wireless networks are a very challenging communication technology since their ability to be set everywhere and whenever. Among the several types of wireless systems, a new class of networks is gradually emerging: Wireless Mesh Networks (WMNs). A WMN is a distributed communication infrastructure organized in a mesh topology, which handles multi-hops connections and is capable of provide dependable services by dynamically updating and optimizing communications. This paper presents a new cross-layer architecture for supporting QoS in WMNs. It integrates the DiffServ paradigm with the admission control signaling and a multipath routing to route QoS traffic along reserved paths, while making use of alternative paths for Best Effort load. Performance measurements, based on simulative techniques are carried out to test the reliability of the proposed system.

关键词： Mesh networks Wireless mesh networks Communications technology Network topology Spread spectrum communication Diffserv networks Admission control Routing Communication system traffic control Traffic control

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Smart read/write for MPI-IO

Smart read/write for MPI-IO

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international symposium on parallel and distributed Processing (IPDPS)

作者： Saba Sehrish Jun Wang School of Electrical Engineering and Computer Science University of Central Florida USA

We present a case for automating the selection of MPI-IO performance optimizations, with an ultimate goal to relieve the application programmer from these details, thereby improving their productivity. Programmers productivity has always been overlooked as compared to the performance optimizations in high performance computing community. In this paper we present RFSA, a reduced function set abstraction based on an existing parallel programming interface (MPI-IO) for I/O. MPI-IO provides high performance I/O function calls to the scientists/engineers writing parallel programs; who are required to use the most appropriate optimization of a specific function, hence limits the programmer productivity. Therefore, we propose a set of reduced functions with an automatic selection algorithm to decide what specific MPI-IO function to use. We implement a selection algorithm for I/O functions like read, write, etc. RFSA replaces 6 different flavors of read and write functions by one read and write function. By running different parallel I/O benchmarks on both medium-scale clusters and NERSC supercomputers, we show that RFSA functions impose minimal performance penalties.

关键词： Programming profession Productivity parallel programming Clustering algorithms Optimization Supercomputers Computer science Application software High performance computing Writing

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CCQR: Constant Cost Quality-based Routing Protocol in Delay Tolerant Networks

CCQR: Constant Cost Quality-based Routing Protocol in Delay ...

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international Conference on parallel and distributed systems (ICPADS)

作者： Tao Li Chao Dong Guihai Chen State Key Laboratory of Novel Software Technology Nanjing University Nanjing Jiangsu China Institute of Communication Engineering of PLAUST Nanjing Jiangsu China

Quality-based routing protocols are proposed to restrict message flooding within only high quality nodes in delay tolerant networks (DTNs). However, different quality threshold mechanisms have diverse impact on the network and we investigate this issue in the paper. Through theoretical analysis we show that heterogeneous threshold mechanism suffers a severe nodal cost imbalance problem. Furthermore, for both homogeneous and heterogeneous mechanisms, routing cost depends on the total number of nodes, and becomes significant in large-scale networks. To address these issues, we propose Constant Cost Quality-based Routing (CCQR) protocol, which not only retains the favorable features of quality-based routing protocols, but also achieves a constant routing cost. More importantly, thanks to the wise message distribution rules, CCQR protocol is capable of alleviating nodal cost imbalance problem effectively. We also conduct extensive simulations to verify our conclusions and the efficacy of the new protocol.

关键词： Costs Routing protocols Disruption tolerant networking Floods Chaotic communication Laboratories Communication system software software quality Large-scale systems Wireless networks

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Using Pcache to Speedup Interpretation in Dynamic Binary Translation

Using Pcache to Speedup Interpretation in Dynamic Binary Tra...

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international symposium on parallel and distributed Processing with Applications, ISPA

作者： Wei Chen Hongyi Lu Li Shen Zhiying Wang Nong Xiao School of Computer National University of Defense Technology Changsha Hunan China

Abstract- Dynamic binary translation (DBT) converts codes written for a source instruction set architecture (ISA) into optimized code for a target ISA. DBT has emerged as an important tool with real world applications. Interpretation is always adopted to handle the non hotspot code in a two stage DBT system. An important consideration in such DBT systems is the interpretation overhead. We investigate that repeated redecoding operations are the bottleneck of interpretation overhead. We propose interpreted code cache (Pcache), a hardware assist to save the information of the decoded instruction for reuse. We analyze and model Pcache performance via simulation on a DBT system simulator. Results from SPEC2000 integer benchmarks show that Pcache could significantly reduce redecoding operations and the overhead of interpretation in a DBT system. The speedup of interpretation is up to 17.12 on average with assist of Pcache. We also analyze the extra overhead caused by Pcache, which is neglectable compared to the performance gains.

关键词： Instruction sets Decoding Application software Hardware Analytical models Performance analysis Performance gain Cost function Emulation distributed processing

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An integrated approach to improving the parallel application development process

An integrated approach to improving the parallel application...

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international symposium on parallel and distributed Processing (IPDPS)

作者： Gregory R. Watson Craig E. Rasmussen Beth R. Tibbitts IBM Thomas J. Watson Research Center USA Los Alamos National Laboratory USA

The development of parallel applications is becoming increasingly important to a broad range of industries. Traditionally, parallel programming was a niche area that was primarily exploited by scientists trying to model extremely complicated physical phenomenon. It is becoming increasingly clear, however, that continued hardware performance improvements through clock scaling and feature-size reduction are simply not going to be achievable for much longer. The hardware vendor's approach to addressing this issue is to employ parallelism through multi-processor and multi-core technologies. While there is little doubt that this approach produces scaling improvements, there are still many significant hurdles to be overcome before parallelism can be employed as a general replacement to more traditional programming techniques. The parallel tools platform (PTP) project was created in 2005 in an attempt to provide developers with new tools aimed at addressing some of the parallel development issues. Since then, the introduction of a new generation of peta-scale and multi-core systems has highlighted the need for such a platform. In this paper, we describe some of the challenges facing parallel application developers, present the current state of PTP, and provide a simple case study that demonstrates how PTP can be used to locate a potential deadlock situation in an MPI code.

关键词： parallel programming parallel processing Performance analysis Debugging Hardware Programming profession Application software System recovery Concurrent computing Electronics packaging

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