4 ms·
> (100 bytes per TB are expected to go bad every year) That's unsettling. Source?
by cheeseprocedure 14y ago
> (100 bytes per TB are expected to go bad every year)
That's unsettling. Source?
- luser001 14y agoSorry, it's 10 bytes, not 100. 1 TB = 2^40 bytes Amazon claims 99.999999999% durability. https://aws.amazon.com/glacier/faqs/ https://aws.amazon.com/glacier/faqs/ 2^40 * (1 - 99.999999999/100) = 10.99 bytes
- danieldk 14y agoIsn't it more bytes in practice? That's 88 bits, but they could be spread over different bytes, right? In other words: shouldn't you calculate the loss over the total number of bits?
- luser001 14y agoSorry, my comment above wasn't well thought out. Amazon's durability guarantee is on a per-object basis, not on a per-byte basis. I will post an article here after I research it thoroughly.
- luser001 14y agoSorry, I think I should retract that statement which I seem to have recalled mistakenly. The error rate seems to be quite a bit lower than that, so I will post an article here after I research it thoroughly.