Kharybin A. Models and methods of the survivability estimation of distributed information systems

Object – processes of the analysis and development of the survival distributed information systems. Target of research - to increase the accuracy and adequateness of the estimation of survivability of the distributed information systems, which are functioning in an extreme conditions. Basic methods of research are the methods of system and Markov analysis, theoretically-plural description, mathematical modeling, theory of graphs, theory of chances, mathematical statistics, imitation modeling, combinatorial principles, basic laws of flowing physical processes in component fragile environments. Scientific results are: model of influences on serviceability of distributed information systems switching and data-centers, based on complexion of two approaches to the description of processes of their functioning - as stochastic continuous representations of restored system, and also as a territorially and structurally - distributed object representations, which allows to take into account influences of such extreme factors as fire-impacts of rocket&artillery systems of arms and information (cybernetic) deliberate attacks, that allows to increase adequacy and completeness of the account of negative consequences of influences of extreme functionality conditions at carrying out of an estimation of probabilistic-timing survivability indexes and coefficients; model of influences on serviceability of fiber-optical information lines which is based on laws of course of physical processes in compound fragile environments at mechanical stretching loadings, takes into account constructive and operational features of real main fiber-optical cables by representation of processes of their degradation and restoration with the Markov-chains models, which allows to carry out the estimating and forecasting of changes of survivability; advanced estimation method of distributed information systems survivability which is taking into account a difference of parameters of object survivability and functional elements criticality, the structural distributed information systems organization and features of extreme influences on its subsystems. Introduction is branch-based. Fields of use – development, exploitation and analysis of the distributed information systems of the critical usage and them elements.