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It is possible to achieve the 6 nines?
(lemmy.ko4abp.com)
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this post was submitted on 05 Jul 2023
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Possible yes. Cost effective / valid business case probably not. Every extra 9 is diminishing returns: it'll cost you exponentially more than the previous 9 and money saved from potential downtime is reduced. Like you said 32 seconds of downtime, how much money is that for the business?
You're pretty much looking at multiple geographically diverse T4 datacenters with N+2 or even N+3 redundancy all the way up and down the stack, while also implementing diversity wherever possible so no single vendor of anything can cause you to not be operational.
Even with all that though, you'll eventually get wrecked by DNS somewhere somehow, because it's always DNS.
It's always DNS (bad memories showing up)