Virtual Database Technology for Distributed Database in Ubiquitous Computing Environment
Yuji Wada, Yuta Watanabe, Keisuke Syoubu, Hiroshi Miida, Jun Sawamoto · American journal of database theory and application · 2012
In this paper, our research objective is to develop a database virtualizat ion technique in order to let data analysts or other users who apply data mining methods to their jobs use all ubiquitous databases on the Internet as if they were recognized as a single database, thereby helping to reduce their workloads such as data collection fro m the Internet databases and data cleansing works. In this study, firstly we examine XM L schema advantages and propose a database virtualizat ion method by which such ubiquitous databases as relational databases, object-oriented databases, and XM L databases are accessed as if they all behave as a single database. Then, we show the method of virtualization of ub iquitous databases that can describe ubiquitous database schema in a unified fashion using the XML schema. It consists of a high-level concept of distributed database management of the same type and of different types, and also of a location transparency feature. Ne xt, we discuss about the development of a co mmon schema generation method and propose the virtual database query language for use in the virtualized ubiquitous database environment. Finally, we propose a database incompatib ility trouble-recovery technique for use in a virtualized ubiquitous database environment.