> do with S3 to achieve 11 9's availability
I see so many people confused about this. Eleven nines is their durability guarantee, their availability that they guarantee is only 99.99%
I see so many people confused about this. Eleven nines is their durability guarantee, their availability that they guarantee is only 99.99%
availability means you'll get your bits immediately.
Durability is the % of your data that doesn't die. Eleven 9s means that if you store 1TB on AWS S3 you can expect to lose 10 bytes and still be within SLA.
As a very simplified example, imagine they are expecting to lose 2 servers every day, this percentage might be the probability of those two servers storing the same exact object (and thus, losing it irretrievably).
i.e. you could expect to lose 10 bytes of your 1TB every year if your stored it as a trillion one byte objects, but if you stored it as a single object you could expect to lose the whole thing once every hundred billion years, but none of it the rest of the time.