ATUALIZAÇÃO DINÂMICA DE SOFTWARE EM SGBDS COM SUPORTE DO MODELO DE COMPONENTES
GASPERI, Cleandro Flores de. DYNAMIC SOFTWARE UPDATE IN DATABASE MANAGEMENT SYSTEMS WITH SUPPORT OF SOFTWARE COMPONENT MODEL. 2011. 56 f. Dissertação (Mestrado em Ciência da Computação) - Universidade Federal de Santa Maria, Santa Maria, 2011.
Gasperi, Cleandro Flores de
The daily use of Internet services in the most diverse human activities creates in users the expectation of high availability of these services. Many of them have database systems as essential building block. Moreover, those services are subject outcomes such as errors and aging. An error-free software or a non-aging software which does not need innovations is an utopia. Thus, software updating is a required task. Currently, software-updating mechanisms are based on two different solutions: (i) using of additional hardware, an expensive and complex solution, or (ii) service interruption, which is trivial but inefficient. In this work, we explore the application of Dynamic Software Update (DSU) techniques as an alternative to update a Data Base Management System (DBMS) without requiring any additional hardware or service unavailability. Our solution was developed in a hypothetical DBMS architecture with the support of a software component model. A prototype was developed in accordance with this model using FRACTAL. Experimental evaluation confirmed the functional viability of this approach. The implementation overhead in a controlled environment was about 30%, which is acceptable.
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