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Re:Anybody using Amazon Web Services (S3, EC2) in their star... by jganetsk on Thursday April 05, 2007 @12:23PM (#9257)
Just so everyone is aware, S3 guarantees only 4 nines of relability (99.99% uptime), not 5 nines.

5 nines means the service is down, on average, 5 minutes out of a year.

4 nines would be almost an hour.

That's still pretty damn good.

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