[Elgolfin]

The solution may have a serious cost depending on your architecture. You will have to make sure it is worth the investment. Replicating and keeping a whole infrastructure stand-by is not an easy job for an one-hour outage. Sometimes, it is not the right solution either. It really depends on the business you are in.

[macintux]

It's also possible that you could accidentally stumble into a situation where doubling your presence also doubles the risk of significant problems.