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Explore a comprehensive conference talk detailing Hitachi Rail's approach to building highly reliable cloud infrastructure for safety-critical railway applications. Learn about the design and implementation of a redundant, air-gapped private cloud architecture utilizing Hardware, OpenStack, Ceph, and Kubernetes to achieve six nines reliability (99.9999% uptime) from the standard five nines availability. Discover the critical importance of Safety Integrity Levels (SIL) in railway systems, particularly SIL 4 requirements for the highest-risk applications where passenger safety is paramount. Examine specific architectural decisions that address SIL compliance, day-2 operations, upgrade procedures, and disaster recovery requirements for platforms designed to operate reliably for over 20 years. Gain insights into the unique challenges of deploying cloud technologies in safety-critical environments and understand how traditional cloud infrastructure can be adapted to meet the stringent reliability, availability, safety, and security standards required by the railway industry.
