Research And Perfection Of Grid Workflow

First of all, this thesis analyzes the present situation and development trend of grid workflow. With the flourishing development of grid workflow technology, the research of grid workflow mainly contains two aspects. On one hand, some relational research organization puts forward some advice and criterions of grid workflow. For instance, Globus organization puts forward the recommendatory criterion of grid workflow language GSFL. On the other hand, some practical projects and systems of grid applications are implemented, which are constructed and managed by grid workflow. For instance, Globus Alliance puts forward the GridAnt project etc.Through the analysis of present situation of grid workflow, low work performance is the main problem of current grid workflow. Aiming at this problem, this thesis considers improving the work performance by three facets research, modeling of grid workflow, resource deployment of grid workflow, fault tolerance of grid workflow. About the scale problem of modeling of grid workflow, the process modeling method based on GWF-Net is put forward. This method reduces the scale of process model of grid workflow, makes the logic structure of model more legible, and thereby decreases errors of process model. Because resource deployment of grid workflow is short of effective resource deployment arithmetic, this thesis establishes the model of service choice based on AHP. This model reduces the improper choice of service resources and chooses appropriate service...