Quote:
Originally posted by frankfortuna
Our company specializes in developing HA systems and business continuity plans for business critical systems that rely on the Solaris platform. I often laugh at the numbers that hosting companies insert into their marketing fluff. Let's put things in perspective:
Availability Requirement Yearly Monthly
95% 438h 36h
99% 87.6h 7.2h
99.9% 8.76h 43m
99.99% 52.56m 4.3m
99.999% 5.256 m 25.92 SECONDS
As you can see 99% uptime leaves a large margin for error.
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Yup, I usually refer people to these numbers, as well. I see 95% and 97% a lot of the time, but it's 2 and 1 day of downtime / year. My host has 99.999% uptime - 5 minutes of downtime per year - 25 SECONDS of downtime per month (a little mistake in your table that I quoted). The rest, even 99.99% uptime, are not even close to this...