Would be very interested to exchange with anybody who could have experimented the implementation of a Quantum Hot Standy Architecture, with more than 1 km distants CPUs
In the application I designed, we have 3 pairs of redundant processors and RI/O. Each processor pair is in a dedicated enclosure. One of these pairs is about 1km away. We use a total of four NW FR89D200 to integrate this remote processor system with the other two. Any interlocks between the processor systems are hard wired I/O.