in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...

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...

A Grid service is an extended Web service that conforms to the Open Grid Service Infrastructure (OGSI) specification. The capability that existing Web service technology express is relatively weak. The publishing and discovery of Grid resource are crucial steps in Grid computing. In this paper, we propose a novel semantics based Grid Service framework which support publishing and discovery of G...

In this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. The engines are assumed to be implemented as composite web services. Current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. The difficulty is to rollback the execution state of the workflo...

In this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. The engines are assumed to be implemented as composite web services. Current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. The difficulty is to rollback the execution state of the workflo...

Grid computing technologies enable widespread sharing and coordinated us of networked resources, including computing resources. Open Grid Service Architecture (OGSA) marries Web services to grid protocols, thereby making progress in defining interfaces for grid services. We put forward here a hierarchical architecture, which is based on grid service, for parallel computing in grid environment. ...

An important aspect of Grid computing is publication resource service and discovery resource service. Grid computing is based on this kind of mechanism. A Grid service is an extended Web service that conforms to the Open Grid Service Infrastructure (OGSI) specification. The shortcoming of current Web service technology only provides syntactic description. In this paper, we analyze the limitatio...

Aggregation grid enables all grid nodes connected with a hierarchical architecture into a world-wide grid which can provide all services to all grid nodes for anyone who visits any grid node in the aggregation grid. Once users submit service requests anywhere, the aggregation grid would find the service regardless of where the service is, and will provide the service to users’ desktop. Service ...

Effective and efficient Quality of Service (QoS) management is critical for a service grid to meet the requirements of both grid users and service providers. We introduce Q-GSM, a scalable framework for service management in grid environments, to address this problem. Main characteristics of our framework are 1) grid level resource reservation mechanism; 2) mapping application level service qua...