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Based Web Service Composition Grid Work Flow

Posted on:2008-10-28Degree:DoctorType:Dissertation
Country:ChinaCandidate:B LiuFull Text:PDF
GTID:1118360212498644Subject:Management Science and Engineering
Abstract/Summary:PDF Full Text Request
More and more powerful computing and collaborative Grid applications that require tremendous resources are constructed as the Grid researches and Grid infrastructure greatly advance. Many applications are more and more complicated which are constrained by temporal and resource relationship. Grid workflow can conveniently construct, execute, manage and monitor grid applications, and automate grid applications with great efficiency. Due to the dynamism, distribution, heterogeneity and autonomy of grid applications, conventional workflow technology can't effectively solve the relative problems of grid environment. According to characteristics of grid resources and grid applications, the thesis studies grid workflow process model, organization and resource model, dynamic scheduling algorithm. The detail is as following:Grid workflow architecture. The architecture is composed of grid workflow user port, grid workflow service management, grid workflow organization and resource management, grid workflow performance monitoring and evaluation and grid workflow engine. The architecture complying with the standard of WFMC and GCC is open and extensible.Grid workflow process model. The dynamic workflow net named CPWF-Net is presented based on the WF-Net, which introduces the idea of dynamism and high level Petri. It can solve the problem of expansion, dynamism and multi-selection of grid process model. The grid process model constructed by CPWF-Net can be analyzed and simulated by the existed petri net technology and tools according to the analysis and verification of relationship between D-Petri Net and Petri net.Grid workflow organization and resource model. The virtual organization in the grid environment is analyzed. The relationship of members in the virtual organization is defined. Based on the grid resource management model and virtual organization model. The integrated organization and resourced model is presented, and the algorithms of querying, adding, exiting about grid organization and resource are put forward. The integrated model can facilitate the dynamical scheduling for workflow engine.Grid workflow approach using web service composition. The relationship between Web service and Petri net is discussed, and the control structure of Petri net is extended. With the help of semantic information into web service, the replacement problem of web service in the process of workflow is discussed.Prototype based on USTC Portal. We developed and deployed the Huaihe River reservers co-scheduling system.
Keywords/Search Tags:Grid Workflow, CPWF-Net, Dynamic Process Model, Organization and Resource Model, Dynamic Scheduling, Web Service Composition, Portal
PDF Full Text Request
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