A Study on Distributed Fault-Tolerant Service Architectures for Critical Software Systems

Reliable systems have been the subject of much research in the past %ears. with societal dependency on computer systems becoming more and more apparent. With more and more organizations embracing DevOps culture, there is a persistent need to understand how these systems are built and what their trade-offs are. This paper discusses and benchmarks the components of a modern fault tolerant and easily scalable system. designed to maximize up-time. The paper also describes the techniques used In the development of such a system. The system architecture described is implemented through several services deploy ed for a new critical single sign-on system deployed at CERN (The European Laboratory for Particle Physics). A case study of several critical components of the system is also performed, identifying several trade-offs. issues and future research directions.