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Curios if you tell your customers you’re totally ok with having lower than 99.9 availability

We don't have any external customers; they are all internal. We're all on the same side of the table.

Sounds like even worse deal for the customer since there is no refund

Depends on the service are

I have some services which can cope with a 98.5% downtime, as long as they are available the specific 1.5% of the time we need them to run, as such "the cloud" is useless for that service

Right when you really want your thing to be up and can’t amortize hours of continuous downtime cloud has no solution for this. That’s something that often gets left out from the sales pitches tho =)

How many 9s can you get from a single-region multi-AZ deployment not on us-east-1 and which nly uses basic services (EC2, IAM, S3, DynamoDB, etc)?

Really only 3?

Depends on how critical they are to your stack. Ime if you use more than a few products and either one of them can take you down yeah it’s less than 3. Just something to ponder but if s3 didn’t meet 99.9 for the month you get a whopping 10% back. Other cloud vendors aren’t much better at this (actually worse). Not even to mention that you need to leave some room for your own fuckups

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