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Assigning local fixed-time constraints in grid workflow systems

Assigning local fixed-time constraints in grid workflow syst...

引用

5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Chen, Jinjun Yang, Yun Swinburne Univ Technol CITR Fac Informat & Commun Technol POB 218 Melbourne Vic 3122 Australia

ISBN: (纸本)0769526950

Many complex grid workflow processes often have only one global fixed-time constraint at the last activity. Since grid workflow execution normally lasts a long time, local control is very important to ensure the overall temporal correctness. With only one global fixed-time constraint, we cannot control grid workflow execution locally in terms of time. As a result, for any temporal violations, we must handle them globally with the consideration of all activities. this would impact the overall cost-effectiveness of grid workflow execution. therefore, in this paper, we investigate how to assign local fixed-time constraints within the global one so that we can control grid workflow execution locally. Corresponding assigning and verification methods are developed With local fixed-time constraints, we can achieve better cost-effectiveness.

关键词： Grid computing

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i-DBF: an improved bloom filter representation method on dynamic set

i-DBF: an improved bloom filter representation method on dyn...

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Wang, Jiacong Xiao, Mingzhong Jiang, Jing Min, Bonan Peking Univ Comp Networks & Distributed Syst Lab Beijing 100871 Peoples R China

ISBN: (纸本)0769526950

Bloom Filter is a simple space-efficient randomized data structure for representing a set in order to support membership queries, which uses an m-bit array to represent a data set. Dynamic bloom filter (DBF) can support concisely representation and approximate membership queries of dynamic set instead of static set. It has been proved that DBF not only possess the advantage of standard bloom filter, but also has better features when dealing with dynamic set. But DBF also has a disadvantage: the addition operation which mapped element x into bloom filter s will become no sense, if some of the first s-1 bloom filters have already responded that element x is in set A with some false positive probability. We point out this shortcoming and improve the addition operation with a new algorithm. We call this improved dynamic bloom filter i-DBF Finally, we prove that this i-DBF has better performance both in the storage space and in the false positive probability.

关键词： Data structures

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Integration of existing grid tools in Sakai VRE

Integration of existing grid tools in Sakai VRE

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Yang, Xiaobo Wang, Xiao Dong Allan, Rob Dovey, Matthew Baker, Mark Crouchley, Rob Fish, Adrian Gonzalez, Miguel van Ark, Ties CCLRC Daresbury Lab E Sci Ctr Warrington WA4 4AD Cheshire England JISC Execut Bristol BS8 1QU Avon England Univ Reading ACET Reading RG6 6AY Berks England Univ Lancaster E Social Sci Ctr Excellence Lancaster LA1 4YT England

ISBN: (纸本)0769526950

the integration of existing Grid tools into the Sakai VRE (Virtual Research Environment) will be discussed in this paper In particular we describe the integration of the business logic and JSR 168 compliant portlets through presentation-oriented Web Services, via WSRP (Web Services for Remote Portlets). A set of JSR 168 compliant portlets were developed for the UK NGS (National Grid Service) Portal and have been published using WSRP4J and consumed within Sakai successfully, which proves re-use of portlets as web components is a practical option. With the help of the WSRP consumer tool, the Sakai VRE has been successfully extended to support the JSR 168 specification.

关键词： distributed computer systems

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Extending an SSI cluster for resource discovery in grid computing

Extending an SSI cluster for resource discovery in grid comp...

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Echaiz, Javier Ardenghi, Jorge Univ Nacl Sur LISiDi Dept Ciencias & Ingn Computac RA-8000 Bahia Blanca Argentina

ISBN: (纸本)9780769526942

Grid technologies enable large-scale sharing of resources within formal or informal consortia of individuals and/or virtual organizations. In these settings, the discovery, characterization, and monitoring of resources, services, and computations can be challenging due to the considerable diversity, large numbers, dynamic behavior, and geographical distribution of the entities in which a user might be interested. Hence, information services are a vital part of any Grid software infrastructure, providing fundamental mechanisms for discovery and monitoring, and thus for planning and adapting application behavior. this paper proposes a resource discovery system for grid computing with fault-tolerant capabilities starting from an SSI clustering operating system. the proposed system uses dynamic leader-determination and registration mechanisms to automatically recover from nodes and network failures. the system is centralized and uses dynamic (or soft-state) registration to detect and recover from failures. Provisional or backup leader determination provides tolerance and recovery in the event of the leader node failing. the system was tested against a control network modeled after existing grid computing resource discovery components, such as Globus Monitoring and Discovery System (MDS). In various failure scenarios, the proposed system showed better resilience and performance than the control system.

关键词： grid operating systems resource discovery fault tolerance high performance computing

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A hyper-cube based P2P information service for data grid

A hyper-cube based P2P information service for data grid

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5th international Conference on Grid and Cooperative computing, GCC 2006

作者： Ren, Hao Wang, Zhiying Liu, Zhong National Laboratory for Parallel and Distributed Processing NUDT China

ISBN: (纸本)0769526942

there are many researches use peer-to-peer model to organize the Grid Information Service (GIS) and have been testified which be able to improve scalability and reliability of Grid environment. However, Data Grid Information Service (DGIS) has its special requirements and all approaches of PIP model used in GIS cannot be applied to DGIS. In this paper, we propose a new approach for DGIS that imposes a deterministic P2P shape based on hypercube topology, which allows for very efficient query broadcasting. Furthermore, we proposed a transposition algorithm to optimize the overlay network's topology according to the access statistics between peers, making the peers always access each other become neighbor by transposing peer's place. the simulation shows that the transposition algorithm could significant improve searches efficiency. © 2006 IEEE.

关键词： Information services

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Vega Information Grid: A suite of toolkit for building information sharing scenario

Vega Information Grid: A suite of toolkit for building infor...

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Li, Xiaolin Huang, Wenlong Yan, Bo Chinese Acad Sci Inst Comp Technol Beijing 100080 Peoples R China Chinese Acad Sci Grad Sch Beijing 100080 Peoples R China

ISBN: (纸本)0769526950

there are many common challenges to integrate and share information resources in enterprise or industrial environment, for example, heterogeneous structure of data sources, dynamical changing of source location and schema, sharing information across multiple autonomous administrative domains, fine-grained access control, and personalized requirements. Although it is possible to build a specialized solution to meet any scenario requirements, the solution, which is very suitable to the specialized scenario, may not be available to other scenarios. Based on Wet, Services technology, Vega Information Grid (VIG) abstracts commonality of requirements and addresses these issues by information virtualization. A suite of toolkit, which provides functionalities suitable for different scenarios, enables enterprise users to acquire and deploy information cost-effectively in a virtual grid platform, and to benefit greatly form the decrease of thefull life cycle time and the cost of management and changes of sharing information. this paper introduces its information virtualization model based relation schema, and decoupled architecture supporting personalized utilization pattern.

关键词： distributed computer systems

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Method of using BDI agents to implement service-oriented workflow mapping in AGWMS

Method of using BDI agents to implement service-oriented wor...

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Cao, Lei Li, Minglu Cao, Jian Tang, Feilong Shanghai Jiao Tong Univ Dept Comp Sci & Engn Shanghai 200240 Peoples R China

ISBN: (纸本)9780769526942

Grid computing is becoming a mainstream technology for large-scale distributed resource sharing and system integration. Workflow management is also emerging as one of the most important grid services. Web service composition has been one of the hottest research topics. Grid environment is very dynamic, and the services are shared among many users, it is impossible to optimize the workflow from the point of view of execution ahead of time. In fact, one may want to make decisions about the execution locations and the access to a particular data set as late as possible. In this paper, we propose a method of using BDI agents to implement service-oriented workflow mapping in our agent-based grid workflow management system (AGWMS), which helps grid users streamline, manage and monitor their routinely problem solving processes without having to know any details of the underlying complex structure and dynamic state of VOs. BDI agent technology helps the system meet challenges from the grid context. three types of workflow in AGWMS are denoted as abstract workflow (A if, concrete workflow (CW) and executable workflow (EW). We also propose AW2CW mapping algorithm and CW2EW mapping algorithm to implement service-oriented workflow mapping. Utilization of three workflow types further liberates model designers from sophisticated system details. It also increases the reusability of domain-specific models and improves the fault tolerance of the system.

关键词： Grid computing

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Shared receive queue based scalable MPI design for InfiniBand clusters 20

Shared receive queue based scalable MPI design for InfiniBan...

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20th IEEE international parallel and distributed Processing symposium, IPDPS 2006

作者： Sur, Sayantan Chai, Lei Jin, Hyun-Wook Panda, Dhabaleswar K. Network-Based Computing Laboratory Department of Computer Science and Engineering Ohio State University United States

ISBN: (纸本)1424400546

Clusters of several thousand nodes interconnected with InfiniBand, an emerging high-performance interconnect, have already appeared in the Top 500 list. the next-generation InfiniBand clusters are expected to be even larger with tens-of-thousands of nodes. A high-performance scalable MPI design is crucial for MPI applications in order to exploit the massive potential for parallelism in these very large clusters. MVAPICH is a popular implementation of MPI over InfiniBand based on its reliable connection oriented model. the requirement of this model to make communication buffers available for each connection imposes a memory scalability problem. In order to mitigate this issue, the latest InfiniBand standard includes a new feature called Shared Receive Queue (SRQ) which allows sharing of communication buffers across multiple connections. In this paper, we propose a novel MPI design which efficiently utilizes SRQs and provides very good performance. Our analytical model reveals that our proposed designs will take only 1/10ththe memory requirement as compared to the original design on a cluster sized at 16,000 nodes. Performance evaluation of our design on our 8-node cluster shows that our new design was able to provide the same performance as the existing design while requiring much lesser memory. In comparison to tuned existing designs our design showed a 20% and 5% improvement in execution time of NAS Benchmarks (Class A) LU and SP, respectively. the High Performance Linpack was able to execute a much larger problem size using our new design, whereas the existing design ran out of memory. © 2006 IEEE.

关键词： Interconnection networks

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Standardizing resource selection and access on computational grids

Standardizing resource selection and access on computational...

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5th international Conference on Grid and Cooperative computing (GCC 2006)

作者： Huashan, Yu Zhuoqun, Xu Peking Univ Sch Elect Engn & Comp Sci Beijing 100871 Peoples R China

ISBN: (纸本)9780769526942

Standardization of resource interfaces and behaviors is critical for realizing the Grid vision. Most works up to now mainly focus on technologies of accessing remote and heterogeneous resources. A two-layer framework for selecting and accessing resources on computational Grids is presented. It groups resources across organizations in an application oriented manner, and virtualizes each group of resources to be a set of stateful WEB services. these WEB services provide the capabilities for combining resources within, as well as across, organizations to prepare customized job execution environments as required. For every dynamically created execution environment, its lifecycle is allowed to span as long as desired to execute multiple jobs, and its interface and behaviors are standardized in an application oriented way. the framework has been implemented to virtualize resources in Harmonia, which is a software platform for coordinative computation and is utilized for developing the campus Grid of Peking University.

关键词： Grid computing Web services Resource virtualization Licenses Resource management Standardization Concurrent computing Application virtualization Application software Platform virtualization

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5th IEEE/ACIS international Conference on Computer and Information Science and 1st IEEE/ACIS international Workshop on Component-Based Software Engineering,Software Architecture and Reuse - Title

5th IEEE/ACIS International Conference on Computer and Infor...

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international Conference on Computer and Information Science (ACIS)

the following topics are dealt with: parallel and distributed computing; software metrics and project management; communication systems and networks; data mining; data warehousing; information management systems; Internet; mobile computing; wireless computing; software engineering; information engineering; management information systems; image processing and pattern recognition; computer architecture and software testing; artificial intelligence; intelligent agent technology; Web engineering

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