A Decoupled Information Grid Architecture And Its Full Lifecycle Evaluation

It is a challenge for both researchers and vendors to integrate information systems and share information. Enterprises seek for an information grid platform with capabilities enabling user to connect distributed, heterogeneous resources, develop and deploy application at a lower cost, as well as providing with dynamic, openness, single virtual system, and single information source. Although some researches on related work have made many progresses, there is a lack of systemic principle and methodology. For example, various vendors can provide ad hoc solutions to integrate information; however common sensus and evaluation criteria are required. This dissertation first identifies requirements for information grid and then translates those requirements into a coherent set of common issues and techniques by the methodology of comparing information grid system with traditional computer system. Three original ideas are explained in detail.A REVP (Relation_based EVP) resource model is presented in order to eliminate information isolated island. The model supports a three-layer naming scheme: effective relation, virtual relation and physical relation, formalizes dynamic mapping effective relation to virtual relation and binding virtual relation to physical relation. Application can access resources by effective relation address, thus the resource schema and physical location changing makes no difference on the application. We discuss also how to meet the requirements of information connectivity and singe information source based on the model.One of decoupled information grid architectures, named Sludge Architecture, is presented. Key abstractions which are grid channel, session shell, and griplet, including their implementation, are addressed in detail. The architecture supports that user, logic, and resource are bound dynamically to runtime griplet by those abstractions other than by program code. Session container performs griplet processing. Applications are supposed to put their energies into the business logic without considering session, resource binding, and security control, which could curtail the total time cost of programming and maintaining.The full lifecycle evaluation model for information grid is proposed to evaluate full lifecycle productivity of subject and object. The formula and conversion measurement for computing productivity is discussed based on the model, which enables user to evaluate the productivity level of information grid system by qualitative and quantitative analysis.We implement and validate these ideas in Vega ICT Grid system. It empowers user to share information on emphasis of single information source and single virtual system.