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Ripple: Toward a substrate middleware for peer-to-peer applications

Ripple: Toward a substrate middleware for peer-to-peer appli...

引用

3rd International Conference on Innovative computing Information and Control, ICICIC'08

作者： Yao, Hong Yu, Linchen Jin, Hai Yang, Sirui Huang, Qi Jiang, Wenjian School of Computer Science and Technology China University of Geosciences Wuhan 430074 China Cluster and Grid Computing Lab. Services Computing Technology and System Lab. Huazhong University of Science and Technology Wuhan 430074 China France Telecom R and D China Beijing 100190 China

ISBN: (纸本)9780769531618

Peers in multiple P2P applications execute overlapped operations with different implementation, like neighbour management, resource publish/lookup, delay investigation, which leads to poor interoperability and unnecessary network load. Peers contribute their resources only when they stay in same application. We propose a P2P middleware, called Ripple, to accomplish common functions in a layered architecture. Ripple manages all peers running various applications in a uniform substrate overlay network. The substrate overlay is designed with a hybrid topology. This hybrid topology does not aim at only a particular type of applications, but also enables the flexibility for various applications. Our work is an attempt to address common needs of P2P applications, which may simplify the development and improve the performance of P2P networks, as well as mitigate the sampling stress to physical networks. © 2008 IEEE.

关键词： Middleware

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Heterogeneous grid Workflow Management Based on Virtual Service

Heterogeneous Grid Workflow Management Based on Virtual Serv...

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第七届网格与协同计算国际会议(Seventh International Conference on grid and Cooperative computing GCC 2008)

作者： Song Wu Kai Wang Hai Jin Deqing Zou Services Computing Technology and System Lab Cluster and Grid Computing Lab Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781424432806;9780769534497

Heterogeneous grid workflow management plays an important role in the grid interoperation. It integrates service resources from different grid systems and packs them as atomic services into a composite service. The focuses of the research are how to shield the difference among the heterogeneous grid services and how to provide a flexible way to compose services. Heterogeneous grid workflow management mechanism, based on virtual service, compiles with BPEL4WS standards and shields the differences in the aspects of both organization of service information and the types of service among heterogeneous grids. The mechanism compensates for the weakness that traditional mechanism requires prior static binding in the service selection and scheduling. The proposed mechanism can provide some new functions like service backup and dynamic service selection based on QoS to improve the flexibility and stability of workflow management. In addition, in order to address the issues of tight coupling between data and service, the proposed mechanism employs virtual data space and corresponding data transferring solution.

关键词： workflow management grid service virtual service dynamic binding

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SOV: Service Oriented Virtualization Model for Medical Image grid

SOV: Service Oriented Virtualization Model for Medical Image...

引用

IEEE Workshop on Future Trends of Distributed computing Systems

作者： Aobing Sun Hai Jin Qin Zhang Ran Zheng Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

The heterogeneity, distribution and dynamicity of web services hamper WSRF (Web service resource framework) of grid to exert its excellences in resource integrations. In this paper, we propose our SOV (service orient virtualization) model for medical image grid (MedImgrid), which creates a virtual middle layer for grid to simplify the transformation from users' business aims to executable web-service instances. The layer adopts semantic based cross clustering means to support approximate optimal service selection from WSS (Web service set) to break through the hard-encoded mode of web-service based applications. It provides service-independent composition mechanism and can adjust a service composition path even during runtime. SOV utilizes the web services as the joint-point of grid, semantic and virtualization technologies so as to conceal the heterogeneities of low-level resources and surpass the limits of tightly-coupled mode to service composition within grid environment.

关键词： Biomedical imaging Web services Service oriented architecture Resource virtualization Application virtualization Semantic Web Technology management Logic programming Conferences Distributed computing

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Magnet: A novel scheduling policy for power reduction in cluster with virtual machines

Magnet: A novel scheduling policy for power reduction in clu...

引用

IEEE International Conference on cluster computing

作者： Liting Hu Hai Jin Xiaofei Liao Xianjie Xiong Haikun Liu Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

The concept of green computing has attracted much attention recently in cluster computing. However, previous local approaches focused on saving the energy cost of the components in a single workstation without a global vision on the whole cluster, so it achieved undesirable power reduction effect. Other cluster-wide energy saving techniques could only be applied to homogeneous workstations and specific applications. This paper describes the design and implementation of a novel approach that uses live migration of virtual machines to transfer load among the nodes on a multilayer ring-based overlay. This scheme can reduce the power consumption greatly by regarding all the cluster nodes as a whole. Plus, it can be applied to both the homogeneous and heterogeneous servers. Experimental measurements show that the new method can reduce the power consumption by 74.8% over base at most with certain adjustably acceptable overhead. The effectiveness and performance insights are also analytically verified.

关键词： Magnetic multilayers Workstations Servers Lead Magnetic separation Power demand Virtual machining

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WAGA: A Flexible Web-Based Framework for grid Applications

WAGA: A Flexible Web-Based Framework for Grid Applications

引用

IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Xuanhua Shi Zhao Chen Hai Jin Song Wu Ke Fan Service Computing Technology and System Lab/Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

The research about the interaction between grid environments and users is becoming popular. Many scientists propose the integration for Web 2.0 technologies and grid computing. In this paper, we propose a flexible Web-based framework for grid applications - WAGA, which tries to bridge the gap between grid middleware and grid applications. WAGA provides a WYSIWYG (what you see is what you get) way for the programming for grid applications by adopting participation, interaction and sharing features of Web 2.0 technology. With WAGA, a grid user is able to use the grid resources and to develop grid applications without understanding the underlying complexity of grids. WAGA is composed with a Web GUI (called WAGA-designer) and someWeb-based APIs. WAGA-designer is used by grid users to develop application-based Web portal, and the WebAPIs are used by the WAGA-designer. The use case study shows that WAGA is flexible for grid users, and the performance evaluation shows that WAGA works with high efficiency.

关键词： Middleware grid computing Graphical user interfaces Application software Portals Bridges Resource management Computer science Programming profession Mashups

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Two-Level Parallel Implementation of FDTD Algorithm on CBE

Two-Level Parallel Implementation of FDTD Algorithm on CBE

引用

IEEE International Conference on Networking, Sensing and Control

作者： Bo Li Hai Jin Zhiyuan Shao Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

To understand and predict electromagnetic behavior is one of the most important electrical engineering technologies. FDTD is the key algorithm for solving this kind of problems, which provides a direct, time domain solution to Maxwell's equations in differential form with relatively good accuracy and flexibility. In this paper, we propose a novel hybrid parallelization model for FDTD method, which combines the domain distribution scheme and the single instruction multiple data (SIMD) parallelization. This model is able to exploit the computing potential of a new generation parallel machine named cell broadband engine (CBE). The experiment results show that the algorithm obtains approximately linearly speedup with respect to the number of SPEs and has excellent scalability.

关键词： Finite difference methods Time domain analysis Computer architecture clustering algorithms grid computing Concurrent computing Parallel processing Power system modeling Electrical engineering Maxwell equations

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A Novel Virtual grid Experiment Method in MedImgrid

A Novel Virtual Grid Experiment Method in MedImGrid

引用

IEEE/IFIP International Conference on Embedded and Ubiquitous computing, EUC

作者： Ran Zheng Xiaofei Liao Hai Jin Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

During the study of grid projects, a real grid environment or simulated grid is built up for development and experiment normally. But there are some disadvantages such as high cost, complex deployment and configuration, hard management, even conflict among people. A novel virtual grid experiment method with HAL (Hardware Abstraction Level) virtualization technology is presented, which can conquer the disadvantages above and has been used in MedImgrid for the development of medical grid applications. The experiment shows that the method is feasible with low cost, easy configuration and convenient management, so as to increase research efficiency and shorten developing cycle. Furthermore, it can be applied not only in MedImgrid but also in some other grid projects.

关键词： Biomedical imaging Medical diagnostic imaging grid computing Costs Application software Testing Computational modeling Hardware Application virtualization Medical services

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Proxy Based Parallel Data Transfer Mechanism in grid Environment

Proxy Based Parallel Data Transfer Mechanism in Grid Environ...

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International Workshop on Intelligent Networks and Intelligent Systems (ICINIS)

作者： Muzhou Xiong Hai Jin Song Wu Service Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

This paper proposes a novel parallel data transfer mechanism to improve the performance of data transfer in grid environment. It utilizes the servers distributed in grid system and selects some of them as the proxy servers. It introduces the method of how to select the proxy server. Then data are divided into several parts and sent through the selected proxy servers with different physical links. By that, it can effectively improve the performance of data transfer.

关键词： Web server Bandwidth Joining processes Internet Intelligent networks grid computing Distributed computing Physics Intelligent systems Computers

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An Asymmetrical Encryption Based automated trust negotiation model

An Asymmetrical Encryption Based automated trust negotiation...

引用

Inaugural IEEE-IES Digital EcoSystems and Technologies Conference, DEST

作者： Hai Jin Zhensong Liao Deqing Zou Chisong Li Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781424414895

Automated trust negotiation (ATN) is an important means to establish trust between strangers through the exchange of digital credentials and mobile access control policies specifying what combinations of credentials a stranger must submit. As a certificate may contain sensitive information, unlimited disclosure will leak valuable information or jeopardize individual privacy. In order to prevent information leakage, the negotiation protocol is designed so complicated that a requestor is hard to attain the access. In addition, if the encryption algorithm is short in security intensity, the transmitting message over the public channel is easy to be attacked. To solve these problems, an asymmetrical encryption based ATN model (AEBM) is proposed in this paper. AEBM adopts credentials with a flexible format to meet the requirements of access control policies, instead of disclosing the whole contents of a certificate. Further, AEBM uses asymmetric encryption technique to encrypt the transmitting message, which can prevent information from leaking. AEBM presents a new negotiation strategy to enhance the negotiation efficiency. A use case is studied to prove that AEBM is sound and reasonable.

关键词： Cryptography Access control Protocols Public key Educational institutions Authentication Ecosystems

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Heterogeneous Medical Data Share and Integration on grid

Heterogeneous Medical Data Share and Integration on Grid

引用

International Conference on BioMedical Engineering and Informatics (BMEI)

作者： Ran Zheng Hai Jin Qin Zhang Yingshu Liu Pan Chu Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

It is very significant for the medical and health enterprises to develop an efficient medical information grid to achieve sufficient medical data share and integration. In order to access heterogeneous data resources transparently, front agent is built on heterogeneous databases or medical systems, the same as the unified data models and mapping rules with grid services to communicate with upper grid middleware, so that users can query or access medical data conveniently. Two medical application instances, medical information integration and content-based image diagnosis or retrieval of emphysema disease, are introduced and realized with these technologies.

关键词： Biomedical imaging Medical diagnostic imaging Image databases Data models Middleware Medical services Biomedical equipment Information retrieval Image retrieval Content based retrieval

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