Study on the grid-based distributed virtual geo-environment (DVGE-G)

Abstract

It is publicly considered that next generational Internet technology is grid computing, which supports sharing and coordinated use of diverse resources in dynamic virtual organizations from geographically and organizationally distributed components. Grid computing characters strong computing ability and broad width information exchange. After analyzing characteristic of grid computing, this paper expatiates on current application status of grid computing with middleware technology on DVGE-G and problems it faces. Cooperating with IBM, Microsoft and HP, Globus Toolkit as a standard for grid computing is widely used to develop application on grid, which can run on Unix and Windows operation systems. On basis of the five-tiers sandglass structure and web services technology, Globus presented Open Grid Services Architecture (OGSA), which centered on grid services. According to characteristic of DVGE-G and development of current grid computing, this paper put forward Grid-Oriented Distributed Network Model for DVGE-G. Virtual group is corresponding with Virtual Organization in OGSA service, which is easier and more directly for dynamic virtual groups in GDNM to utilize grid source and communication each other. The GDNM is not only more advantage to distributed database consistency management, but also it is more convenient to virtual group users acquiring DVGE-G data information, The architecture of DVGE-G designed in this paper is based on OGSA and web services, which is keep to the five-tiers sandglass structure of OGSA. This architecture is more convenient to utilizing grid service and decreasing conflict with grid environment. At last, this paper presents implementation of DVGE-G and interfaces of Grid Service.