grid computing is an emerging computing paradigm that will have significant impact on the next generation information infrastructure. due to the largeness and complexity of grid system, its quality of service, performance and reliability are difficult to model, analyze and evaluate. this paper proposes a virtual tree-structured model of the grid service. this model simplifies the physical struc...

Grid users always expect to meet some challenges to employ Grid resources, such as customized computing environment and QoS support. In this paper, we propose a new methodology for Grid computing – to use virtual machines as computing resources and provide Virtual Distributed Environments (VDE) for Grid users. It is declared that employing virtual environment for Grid computing can bring variou...

The In-VIGO approach to Grid-computing relies on the dynamic establishment of virtual grids on which application services are instantiated. InVIGO was conceived to enable computational science to take place In Virtual Information Grid Organizations. Having its first version deployed on July of 2003, In-VIGO middleware is currently used by scientists from various disciplines, a noteworthy exampl...

Grid computing has emerged as a technology to solve the problem of sharing and cooperating of computational resources in wide area. In this paper, we propose a Grid architecture called Vega Personal Grid (the Vega PG). The key feature of the Vega PG is that it is a usercentered lightweight Grid architecture. We make a mapping between traditional computer systems and the Vega PG, which comprises...

It is publicly considered that the next generational Internet technology is grid computing, which supports the 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[1]. Globus presented Open Grid Services Architectur...

Virtual machines provide a promising platform for computational Grids. By their very nature -virtualization of underlying hardware -they enable instantiation of a new, independently configured guest environment on a host resource. In addition, they offer the benefits of isolation and fine-grain enforcement and, given the ability to serialize their state and migrate, offer increased flexibility ...

Most Grid systems rely on their operating systems (OSs) to protect their sensitive files and networks. Unfortunately, modern OSs are very complex and it is difficult to completely avoid intrusions. Once intruders compromise the OS and gain system privilege, they can easily disable or bypass the OS security protections. This paper proposes a secure virtual Grid system, SVGrid, to protect sensiti...

This paper presents the work of building a Grid workflow system on distributed virtual machines. A Grid Virtualization Engine (GVE) is implemented to manage virtual machines as computing resources for Grid applications. The Virtual Data System (VDS) functions as a Grid workflow engine. This paper designs and implements the Virtual Data System on distributed virtual machines, which are enabled b...

Grid computing is now in widespread use, integrating geographical computing resources across multiple virtual organizations to achieve high performance computing. A single grid does not often provide a vast resource because virtual organizations have inadequate computing resource restrictions for management on an organizational scale. This paper presents a new grid architecture named Multi-Grid...

A Virtual Organization (VO) in the Grid is a collection of users and distributed resources, in which resources are shared by users. VOs are dynamically created for some goals and then disappear after the goals are achieved. Conventional Grid architectures have been proposed for a single or static VO environment. In this paper, we propose a ticket-based Grid services architecture to support the ...