Browsing by Subject "relational database"

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Access status: Open Access ,
Integracja spadkowych danych relacyjnych do gridu obiektowego typu »data grid«
(Wydawnictwa AGH, 2009) Kuliberda, Kamil; Kowalski, Tomasz Marek; Wiślicki, Jacek; Adamus, Radosław; Meina, Michał
Authors present the implemented and verified with the fully functional prototype approach to integration of legacy relational data into an object-oriented data grid. The presented process in completely transparent due to application of the virtual repository concept and updatable virtual object-oriented views defined in the stack-based approach (SBA). In the described process much stress has been put on employing native optimizers of relational databases. Hence, transportation and processing of retrieved data within the virtual repository have been limited to the required minimum. Due to the described procedures and architecture, an end user receives a purely object-oriented schema reflecting his/her business requirements and/or access privileges, whose data can be queried with an object-oriented query language (SBQL). Data available in relational systems are retrieved as objects and they can be arbitrarily combined with results coming from other integrated data sources (e.g., object-oriented, relational, XML), so that the user is not aware of their actual origin.
Access status: Open Access ,
Parallel and distributed calculations supported and managed by the relational database
(Wydawnictwa AGH, 2009) Oramus, Piotr
A simple, based on a relational database, system, for a management of a parallel and a distributed computer calculations, is presented. In the proposed system, the parallel calculations are carried out according to a master/slave model. Because an input and an output data of programs are stored directly in the database, the use of files is reduced to a minimum. The management system allows for a combination of computing power of many computers for solving a single numerical problem.