afaik they have a tiered service architecture, where tier 1 services are allowed to rely on tier 0 services but not vice-versa, and have a bunch of reliability

afaik they have a tiered service architecture, where tier 1 services are allowed to rely on tier 0 services but not vice-versa, and have a bunch of reliability guarantees on tier 0 services that are higher than tier 1. It is kinda cool that the worst aws outages are still within a single region and not global.