So then why does no one offer 99.999% uptime guarantees in writing?

It should be low risk to offer such guarantees then.

staticassertion 2 days ago | parent | next [-]

Well, (a) why would they? (b) "uptime" has shifted from a binary "site up/down" to "degraded performance", which itself indicates improvements to uptime since we're both pickier and more precise.

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Alifatisk 2 days ago | parent [-]

Are we really questioning why cloud providers would offer better uptime guarantees?

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staticassertion 2 days ago | parent [-]

Yes, I'm asking why they'd lock themselves into a contract around 5 9s of uptime since the parent poster mentioned that they won't do so. Of course, AWS actually does do this in some cases and they guarantee 99.99% for most things, so it feels a bit arbitrary - 5 minutes vs an hour, roughly.

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MichaelZuo a day ago | parent [-]

So then its clearly not as trivial to achieve as you made it sound.

	▲	staticassertion a day ago \| parent [-]
		Are you replying to the right person?

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groby_b 2 days ago | parent | prev | next [-]

You can certainly sign a contract for five nines SLA with cloud providers.

You just won't like the price.

	▲	MichaelZuo 2 days ago \| parent [-]
		Then it’s clearly higher risk?

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Anon1096 2 days ago | parent | prev [-]

If you are asking this question you don't understand what it takes to hit 5 nines in a real life measured system.