Worldwide computing: Adaptive middleware and programming technology for dynamicGrid environments

摘要

Grid systems enable to integrate and even virtu-alize geographically dispersed resources offered, and used, by distributed and dynamic virtual organizations. These resources can belong to domains owned by dif- ferent organizations, making thus difficult their orchestrated working. In fact, current Grid implementations are able to federate worldwide distributed resources across different domains. Nevertheless, there are a number of important issues to be addressed in order to deal with dynamic and adaptive Grid systems. An aspect to consider is the user-oriented selection of Grid resources meant as the capability of identifying the resources better fitting the users expectations. Another aspect concerns the proper configuration of the selected resources so that the user application can profitably interact with them. The interoperability among different Grid implementations is also an open issue due to the lack of adoption of common standards for the management and use of the provided resources. Finally, the definition and study of suitable programming models for exploiting in a coordinated way several Grid resources is a meaningful aspect as well. The aspects mentioned above represent the domain of investigation of this special issue.