Design and Development of Database Integration Framework for Distributed Queries in Parallel using Open Grid Service Architecture

Abstract

The growing number of large knowledge bases necessitates developing techniques that enable the sharing and a cooperative scheme for accessing massively distributed, heterogeneous databases, created and managed independently by several research institutions. However, enabling the sharing of databases without following a predefined common schema and supporting parallel execution of distributed queries are remained as major issues and challenging tasks towards research community. In this paper, a database integration framework that supports execution of distributed queries in parallel has been proposed. Mediator–wrapper architecture has been used to implement the system in which existing services of Open Grid Service Architecture- Data Access and Integration (OGSA-DAI) middleware has been used as wrappers to provide a standard interface to heterogeneous data resources. A distributed query processor (DQP) has been implemented using extensibility points of it to serve as a mediator that provides a global view of wrapped data sources and supports execution of distributed queries in parallel. The frame work has three main parts: data provider layer; Data Grid infrastructure and a user interfacing portal.