[forrestthewoods]

I wonder, what's the yearly downtime of Amazon? If S3 were up 99.99% of the time then the remainder .001% is only 5.256 minutes per year. S3 is actually down more than that. But how much exactly? It's impossible to discuss mitigation strategies if we don't even know what the exact issue we're mitigating is!

[trevyn]

Your math is off for four nines; 100% - 99.99% = 0.01%, which is just over 52 minutes per year.

Also fun: https://en.wikipedia.org/wiki/High_availability#Percentage_c...

[takeda]

The way it works is that they are promising 99.99%. If it is lower you will be reimbursed for that month (if I remember correctly), but only when you complain to them about it.