I may be mistaken, but I really could’ve sworn that a lot of the really strict SLA guarantees Amazon gives assume you are doing things across availability zones and/or regions. Like they’re saying “we guarantee 99.999% of uptime across regions” sort of thing. Take this with a grain of salt, it’s something I only half remember from a long time ago.
Amazon has so much redundancy built into EC2 that I genuinely thought they’d be able to avoid this.
Hardware? Yes
Network misconfiguration? Welll…
You should plan for your app to be multi regional if it needs to be up that much.
That’s what I’m saying. I took an amazon class last summer and that seemed to be the base.
I blame the customers being cheap or app teams being dumb not Amazon if apps are still down after a few hours of regional downtime.
I may be mistaken, but I really could’ve sworn that a lot of the really strict SLA guarantees Amazon gives assume you are doing things across availability zones and/or regions. Like they’re saying “we guarantee 99.999% of uptime across regions” sort of thing. Take this with a grain of salt, it’s something I only half remember from a long time ago.