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Cluster replication for distributed-java-object caching

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 2006年第11期E89D卷 2712-2723页

作者： Banditwattanawong, Thepparit Hidaka, Soichiro Washizaki, Hironori Maruyama, Katsumi Grad Univ Adv Studies Tokyo 1018430 Japan Natl Inst Informat Tokyo 1018430 Japan

object caching is a common feature in the scalable distributed object systems. Fine-grained replication optimizes the performance and resource utilization in object caching by enabling a remote object-oriented application to be partially and incrementally on-demand replicated in units of cluster. Despite these benefits, the lack of common and simple implementation framework makes the fine-grained replication scheme not extensively used. This paper proposes the novel frameworks for dynamic, transparent, partial and automatically incremental replication of distributed Java objects based on three techniques that are lazy-object creation, proxy and hook. One framework enables the fine-grained replication of server-side stateful in-memory application, and the other framework enables the fine-grained replication of server-side stateless in-memory application, client-side program, or standalone application. The experimental evaluation demonstrates that the efficiency in terms of response time of both frameworks are relatively practical to the extent of a local method invocation.

关键词： distributed object caching replication cluster Java-based framework

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Wideband imaging and parameter estimation of distributed objects using the continuous wavelet transform

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SIGNAL PROCESSING 1996年第3期54卷 207-223页

作者： Dixon, TL Sibul, LH Signal Processing Department Applied Research Laboratory The Pennsylvania State University P.O. Box 30 State College PA 16804-0030 USA

In this paper, wavelet transforms and wideband processing techniques are used to actively image a continuously distributed object. This paper shows that a useful estimate of the wideband spreading function (WBSF) can be obtained by operating on a noisy received signal with the wavelet transform. Wavelet estimates of the WBSF of a rough, rotating sphere are formed by processing simulated echoes. A new and unique algorithm is developed to estimate the physical parameters of a distributed object by combining information from several noisy wavelet transform estimates of its WBSF. A computer simulation is performed and results are presented to demonstrate the effectiveness of this technique.

关键词： wavelet transform remote sensing active wideband imaging distributed object wideband spreading function parameter estimation

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Flexible network integrated supervisory control for power systems based on distributed objects

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ELECTRICAL ENGINEERING IN JAPAN 2001年第4期136卷 34-46页

作者： Seki, T Seki, T Tanaka, T Watanabe, H Tokyo Elect Power Co Ltd Comp & Commun R&D Ctr Tokyo Japan Toshiba Co Ltd R&D Ctr Comp Network Lab Tokyo Japan

This paper introduces the flexibility of SCOPE (System Configuration Of Power control system) which is a new architecture to realize flexible and reliable supervisory control for power systems. Energy Management Systems/Supervisory Control and Data Acquisition (EMS/SCADA) systems are usually geographically distributed and have hierarchical operational organizations. They are continuously changing in accordance with various requirements and varying environments. Therefore, they should be flexible enough to adapt to those changes quickly. SCOPE classifies programs in conventional electric power systems into three hierarchical layers: application-dependent part, power system-dependent part, and computer system-dependent part. The power system-dependent part realizes flexibility for changing of power system equipment and operational organization;by introducing an enhanced abstract function of object-oriented technology. Therefore, SCOPE architecture enables EMS/SCADA systems to be flexible, and also enables development efficiently and economically. Through developing and evaluating a SCOPE prototype system, it has been confirmed that the flexibility of EMS/SCADA systems had been improved. (C)2001 Scripta Technica, Electr Eng Jpn, 136(4): 34-46, 2001.

关键词： power system supervisory control system flexibility wide-area network distributed object

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A Framework of Auto-Adapting distributed objectfor Mobile Computing

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Journal of Computer Science & Technology 1999年第6期14卷 590-598页

作者：王晨周颖张德富 StateKeyLaboratoryofNovelSoftwareTechnology NanjingUniversityNanjing210093PR.China

The low bandwidth hinders the development of mobile *** providing relatively higher bandwidth on communication layer, constructing adaptable upper application is important. In this paper, a framework of autoadapting distributed object is proposed, and evaluating methods of object performance are given as well. distributed objects can adjust their behaviors automaticallyin the framework and keep in relatively good performance to serve requests of remoteapplications. It is an efficient way to implement the performance transparency formobile clients.

关键词： distributed object mobile computing framework

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distributed particle simulation method on adaptive collaborative system

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FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF GRID COMPUTING AND ESCIENCE 2001年第1期18卷 79-87页

作者： Sun, YD Liang, ZY Wang, CL Univ Hong Kong Dept Comp Sci & Informat Syst Hong Kong Hong Kong Peoples R China

This paper presents a distributed N-body method based on an adaptive collaborative system model. The collaborative system is formed by the distributed objects on a distributed system. The system can be reconfigured during the computation to fully utilize the computing power of the networked hosts. The method is implemented in Java and RMI to support distributed computing in heterogeneous environment. A distributed tree structure is designed for communication-efficient computation of N-body method. The performance test shows satisfactory speedup and portability of the method on both homogeneous and heterogeneous clusters. The collaborative system model can be used in various applications and it is expandable to wide-area environment. (C) 2001 Elsevier Science B.V. All rights reserved.

关键词： N-body distributed object collaborative system Java

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Development of industrial, information systems on the Web using business components

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COMPUTERS IN INDUSTRY 2003年第2期50卷 231-250页

作者： Arch-int, S Batanov, DN Asian Inst Technol Sch Adv Technol Comp Sci & Informat Management Program Klongluang 12120 Pathumthani Thailand

Web technologies, as tools, are most popular and widely used today not only in the everyday life but in industry as well. Examples of such technologies are the browsers, search engines, related communication protocols and their implementations, mechanisms for creating dynamic and active Web sites, security mechanisms, etc. These technologies lead to requirements for substantial changes in the methodologies for development and deployment of all systems and subsystems, which constitute any business process. Changes and/or new decisions are necessary to make possible the modem Web-based technological tools to be used effectively for Web-based business processes. A methodology for developing business software components as basic building elements of industrial information systems, implemented and deployed in Web-based computing environment is proposed and discussed in this paper. The methodology is based on the idea of creating a unified framework for representing business activities as a basis for business process modeling. Respective models, methods and techniques ensure the business objects and components to applied to currently most accepted three-tier Web application architecture using XML document as distributed object. For illustrative purposes only the proposed methodology is applied step by step, with respective comments, to developing a part of inventory subsystem of industrial information system as a case study. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： business object business component Web information system architecture distributed object industrial information systems

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Programming the Grid with POP-C++

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FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE 2007年第1期23卷 23-30页

作者： Nguyen, Tuan-Anh Kuonen, Pierre HCMC Univ Technol Fac Comp Sci & Engn Ho Chi Minh City Vietnam Univ Appl Sci Fribourg EIA FR Fribourg Switzerland

Despite the fact that Grid computing is the main theme of distributed computing research during the last few years, programming on the Grid is still a huge difficulty to normal users. The POP-C++ programming system has been built to provide Grid programming facilities which greatly ease the development and the deployment of parallel applications on the Grid. The original parallel object model used in POP-C++ is a combination of powerful features of object-oriented programming and of high-level distributed programming capabilities. The model is based on the simple idea that objects are suitable structures to encapsulate and to distribute heterogeneous data and computing elements over the Grid. Programmers can guide the resource allocation for each object through the high-level resource descriptions. The object creation process, supported by the POP-C++ runtime system, is transparent to programmers. Both inter-object and intra-object parallelism are supported through various method invocation semantics. The POP-C++ programming language extends C++ to support the parallel object model with just a few new keywords. In this paper, we present the Grid programming aspects of POP-C++. With POP-C++, writing a Grid-enabled application becomes as simple as writing a sequential C++ application. (C) 2006 Elsevier B.V. All rights reserved.

关键词： parallel object distributed object parallelism programming model Grid programming

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The design and implementation of an active replication scheme for distributing services in a cluster of workstations

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JOURNAL OF SYSTEMS AND SOFTWARE 2001年第3期58卷 199-210页

作者： Wang, L Zhou, WL Jia, WJ Deakin Univ Sch Comp & Math Clayton Vic 3168 Australia Phoneware Commun Syst Burwood E Vic 3151 Australia City Univ Hong Kong Dept Comp Sci Hong Kong Hong Kong Peoples R China

Replication is the key to providing high availability, fault tolerance, and enhanced performance in a cluster of workstations (COWs). However, building such a system remains as a difficult and challenging task, mainly due to the difficulty of maintaining data consistency among replicas and the lack of easy and efficient tools supporting the development procedure. In this paper we propose an active replication scheme in which data consistency can be maintained. Based on the active replication scheme, we present an object-oriented design pattern and a constructing tool to simplify the design and implementation of service replications in COWs. (C) 2001 Elsevier Science Inc. All rights reserved.

关键词： distributed replication system distributed object cluster of workstations fault-tolerance group communication

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object clustering for high performance parallel computing

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JOURNAL OF SUPERCOMPUTING 2001年第3期19卷 267-283页

作者： Kim, HD Jeong, CS Korea Univ Dept Elect Engn Seoul 136701 South Korea

In this article we present a new parallel programming environment, called distributed object-oriented virtual computing environment (DOVE), for clustered computers based on distributed object model. In DOVE, a parallel program is built as a collection of concurrent objects each of which has its own computing power and which interacts with one another by remote method invocation. The parallelism is encapsulated within distributed objects, which can be handled the same way as local objects. The main goal of DOVE is to provide users with an easy-to-use transparent parallel programming environment while supporting efficient parallelism encapsulated and distributed among objects. For the experiment and evaluation of DOVE, two parallel application programs have been developed both on DOVE and PVM.

关键词： clustering parallel computing distributed object object-oriented

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A framework of collaborative design environment for injection molding

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COMPUTERS IN INDUSTRY 2002年第3期47卷 319-337页

作者： Chung, JH Lee, K LG Elect Seoul South Korea Seoul Natl Univ Sch Mech & Aerosp Engn Seoul South Korea

This paper describes the framework of a network-oriented design environment, enabled by eXtensible Markup Language (XML) and CORBA [2], capable of providing collaboration and validity evaluation in injection mold design problems. XML and CORBA [2] are appropriate resources for the construction of such a framework because they have vast potential to improve software interoperability and facilitate data exchange across applications and people from various disciplines and vendors. An overview of the framework is provided and an application to the design phase of injection molding is illustrated. This example illustrates how design validities are notified and new design directions provided to the designer during the design process. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： injection mold distributed object network-based collaborative design design validity evaluation

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