A region in AWS speak is already multiple supposedly independent data centers (in AWS terms: AZ (availability zone)).
So if an entire region fails, that's four or so data centers which all go down at the same time.
So how many companies on bare metal have four data centers and experience this kind of catastrophic downtimes? Add to that, how many of these companies operate completely in the dark about which data center is actually which?
These blog posts are annoying because it seems like these people have never done anything they suggest themselves.
Yes, the cloud lets you setup a fully configured instance within minutes. But at which expense? Mostly intransparency about what the entire stack and what is going on?
That's just it - they're supposedly separate - but each zone is on the same physical site albeit seperated. Unlikely to break at the same time, but more likely than two separate locations. Just google for aws multi zone outages.
Anyway - the article isn't suggesting to use four datacentres, it's trying to make people aware of the simple steps that can be taken to avoid failure.
Ok, to be more obvious: by comparison, a multi-region setup is maybe over the top. Because essentially, you are distributing over something like eight data centers then.
Because you cannot stay in a single AZ either – who knows what will go down and when.
It's insane how this post is so high up on this website. But it goes to show that neither you or the author of this blog post have ever attempted any replication over WAN. Otherwise it would not be called simple.
Do you realize that most of the serious Amazon outages of the past 2 years have had multi-AZ effects? Either due to the root cause, or control plane, or load.
A region in AWS speak is already multiple supposedly independent data centers (in AWS terms: AZ (availability zone)).
So if an entire region fails, that's four or so data centers which all go down at the same time.
So how many companies on bare metal have four data centers and experience this kind of catastrophic downtimes? Add to that, how many of these companies operate completely in the dark about which data center is actually which?
These blog posts are annoying because it seems like these people have never done anything they suggest themselves.
Yes, the cloud lets you setup a fully configured instance within minutes. But at which expense? Mostly intransparency about what the entire stack and what is going on?
Food for thoughts.