If it was a properly architected and configured mainframe system it would have just worked.
High availability, failover, geographically distributed databases, etc. etc. were implemented on the mainframe sometime in the late '80s.
Some of the commentards on this site seem to think the last release of a mainframe OS was in 1979, when actually they have been subject to continuous development, incremental improvement and innovation to this day. A modern IBM mainframe is bleeding edge hardware and software presenting a venerable 1960s facade to its venerable programmers. Bit like a modern Bentley with its staid '50s styling on the outside and a monster twin turbo multi valve engine on the inside.
Biting the hand that feeds IT
