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One-Sided Message Passing Programming Model for Unstructured Peer-to-Peer computing system

One-Sided Message Passing Programming Model for Unstructured...

引用

IEEE International Conference on Computer and Information technology Workshops, CIT

作者： Hai Jin Fei Luo Qin Zhang Xiaofei Liao Hao Zhang Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China

The programming is still a challenging issue for the high performance distributed computing (HPDC) platform, and it is critical to the popularity of peer-to-peer (P2P) based HPDC systems. Therefore, this paper focuses on the design and implementation of OMP, a one-sided message passing programming model for unstructured P2P computing system, P2HP. Based on taskspsila execution flow, P2HP provides a one-sided point-to-point message-passing communication library, and a software development kit with rich APIs for applicationspsila parallelization. Furthermore, a serial sequence alignment algorithm is parallelized with OMP in P2HP. The evaluation shows that OMP makes P2HP practical and efficient.

关键词： Message passing Peer to peer computing Application software Parallel programming Distributed computing Software libraries grid computing Computer architecture Concurrent computing High performance computing

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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...

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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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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

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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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An Asymmetrical Encryption Based automated trust negotiation model

An Asymmetrical Encryption Based automated trust negotiation...

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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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An Authenticated Encryption Mechanism for Secure Group Communication in grid

An Authenticated Encryption Mechanism for Secure Group Commu...

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International Conference on Internet computing in Science and Engineering (ICICSE)

作者： Yunfa Li Hai Jin Deqing Zou Sanmin Liu Zongfen Han 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

In grid computing, group communication is an important strategy to realize large-scale information resource sharing. However, it is very difficult to ensure the security of group communication in large-scale grid environment. In this paper, based on the basic theories of threshold signature and the basic characteristics of group communication in grid, we present four algorithms, including keys generating, individual signature generating and verifying, group signature generating and encrypting, decrypting and group signature verifying, which constitute the authenticated encryption mechanism for group communication in grid. Finally, we validate the correctness of the authenticated encryption mechanism proposed in this paper and analyze its security. In addition, the validity of this mechanism is verified by the experiments. The results show that it is efficient to ensure the security of group communication in grid.

关键词： Cryptography Communication system security Large-scale systems Mobile communication grid computing Character generation Mesh generation Information resources Information security Web and internet services

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A Heterogeneous Data Parallel Computational Model for Cell Broadband Engine

A Heterogeneous Data Parallel Computational Model for Cell B...

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chinagrid Annual Conference (chinagrid)

作者： Bo Li Hai Jin Ran Zheng Qin Zhang 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)9780769533063

Cell broadband engine (Cell BE) is a state-of-the-art heterogeneous multi-core processor. It is an accelerator-based multi-core architecture, which contains a powerful 64-bit dual-threaded PowerPC core and eight high efficient single-instruction-multiple-data (SIMD) cores. Apart from traditional parallel systems, the users must explicitly manage the communication, scheduling and load-balancing to achieve cellpsilas greatest performance. In this paper, a novel heterogeneous data parallel computational model on cell BE is proposed. This aggressive model could not only exploit computing power of SPE but also that of PPE and aggregate them together to achieve high performance. We investigate the performance of this model with naive ray tracing algorithm. The preliminary experimental results validate the efficiency of this model.

关键词： Computational modeling Computer architecture Data models Microprocessors Ray tracing Acceleration Optimization

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Collaboratively Scheduling to Decrease Inter-AS Traffic in P2P Live Streaming

Collaboratively Scheduling to Decrease Inter-AS Traffic in P...

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International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Xuping Tu Hai Jin Xiaofei Liao Weidong Wang Sirui Yang Qi Huang Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China

In the existing data fetching algorithms for P2P streaming systems, the peers usually fetch data independently, leading to huge inter-AS traffic (AS: autonomous system). This paper proposes CoFetch, a collaborative fetching algorithm for P2P live streaming systems to decrease inter-AS traffic. In CoFetch, to avoid that all peers fetch the same data from inter-AS connection, instead of aggressively fetching data depending on the peers' own desires, the peers divide requests into multiple steps. In each step, peers mainly and locally share data fetched in previous steps by other collaborating peers and request subset data from inter-AS connections. The analytical results show that, inter-AS traffic in CoFetch is independent of the number of peers in AS but the number of collaborating peers in AS. Furthermore, in each overlay, when we limit the number of collaborating peers in one AS from 5 to 20, the inter-AS traffic is about 1.7-3 times of the streaming rate, regardless of the number of peers.

关键词： Telecommunication traffic Peer to peer computing Network topology Application software Collaborative work International collaboration Processor scheduling grid computing Computer science Electronic mail

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