Modelling and assessment of functional stability of information systems
The study defines the concept of functional stability of information systems and its key characteristics. Functional stability is considered as an integral property that characterizes the presence of a certain level of reliability, fault tolerance, adaptability, survivability, and security in an IS....
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| Datum: | 2025 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | Ukrainian |
| Veröffentlicht: |
Інститут проблем реєстрації інформації НАН України
2025
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| Online Zugang: | http://drsp.ipri.kiev.ua/article/view/335752 |
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| Назва журналу: | Data Recording, Storage & Processing |
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Data Recording, Storage & Processing| Zusammenfassung: | The study defines the concept of functional stability of information systems and its key characteristics. Functional stability is considered as an integral property that characterizes the presence of a certain level of reliability, fault tolerance, adaptability, survivability, and security in an IS. The functional stability of an IS characterizes the ability of a system to maintain or restore the performance of critical functions even under conditions of disruptive influences, such as technical failures, human errors, external attacks, or other unpredictable events. The main traditional measures for ensuring the functional stability of IS are identified, and their capabilities and limitations are analyzed. The article considers approaches to functionally stable IS construction with using the principles of multiversality, multivariate adaptation and multilevel control of system degradation. A model of a multivariate system is presented. Indicators of functional stability, which take into account both functional capabilities and structural characteristics of the system, are proposed and analyzed. It is shown that the assessment of the functional stability of an IS by the parameters of the graph describing its structure is reduced to clarifying the issue of graph survivability or structural survivability of the IS. Methods, means and technologies of increasing structural survivability are outlined. Operating cycles at different levels of the hierarchy were analyzed to ensure system stability. The ways to increase functional stability, in particular, the technology of dynamic reconfiguration, are considered. A model of structural and functional reconfiguration has been proposed. The modular structure of the reconfiguration management subsystem, which includes modules for monitoring, analysis, diagnostics, configuration generation, reconfiguration implementation, and a reconfiguration database, is designed. The tasks of each of the subsystem components are described. Refs: 8 titles. |
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