Comment Re: Single-region deployments by regulated industr (Score 2) 25
They generally use a primary and standby system, just because it's a lot harder to avoid consistency problems with multiple primaries. This means that you need to direct traffic to the current primary, and redirect it to a standby when necessary, which is fine except that the system you're switching away from and the configuration interface for your DNS provider are both in us-east-1, because everything normally is. That's why they're looking for the ability to make a different region primary specifically during in AWS outage.