Open AccessAnalysing the effect of information redundancy on the dependability indicators of distributed information systems
Author(s) -
Vladimir Kulba,
Sergey Somov,
Alexey B. Shelkov
Publication year - 2022
Publication title -
nadëžnostʹ
Language(s) - English
Resource type - Journals
eISSN - 2500-3909
pISSN - 1729-2646
DOI - 10.21683/1729-2646-2022-22-1-4-12
Subject(s) - dependability , redundancy (engineering) , backup , computer science , reliability engineering , distributed computing , information system , engineering , database , electrical engineering
Aim . The paper analyses the effect of information redundancy on the functional dependability indicators of distributed automated information systems. Information redundancy in the form of hot standby and HDD archives located in the system nodes is examined. Methods. The concepts of the probability theory and Markov processes are employed. Results. Indicators of operational dependability of distributed information systems and the effect of operational and recovery redundancy of data sets on these indicators are analysed. The paper analyses the efficiency of three backup strategies in distributed systems. Conclusions. Using information redundancy significantly improves the dependability and operational efficiency of distributed systems. At the same time, this type of redundancy requires a certain increase in operating costs.