| Summary: | 碩士 === 國立成功大學 === 製造工程研究所 === 87 === In the hardware system, N-tuple modular redundancy (NMR) has been widely used for raising hardware reliability. On the other hand N-version diversifying redundancy (NVDR), as a strategy for enhancing software reliability, has been proposed. Reliability is the focal point in the quest of flawless operations. Not only software but also hardware reliability affects the efficiency and exactitude of data manipulation in the client/server DBMS. There exists consensus for a trustworthy reliability model for specifying, evaluating, and raising the hardware reliability. In contract, NVDR remains a strategy for enhancing software reliability, and a specific and integrated representation that specifies a particular NVDR configuration is still needed. This thesis establishes the framework for representation of NVDR that facilitates reliability analysis.
Achievements of this thesis follow:
1. We characterize the physical configuration of client/server database system by addressing essential cause-effect factors that directly affect the reliability of DBMS operations.
2. We propose a representation of NVDR that offers a clear and definite framework for reliability characterization of a particular client/server NVDR database system.
3. We establish three reliability index tables, one for each of server-end, network, and client-end. These tables are used while developing the most reliable client/server database system architecture with resource constraints.
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