Cloud Backup

[Ghiora Drori]

Shachar Shemesh enjoys being rude and wrong.
I suggest he install new fuses.



On Fri, May 17, 2013 at 10:05 AM, Shachar Shemesh <shachar at shemesh.biz>wrote:

>  On 17/05/13 11:43, Oleg Goldshmidt wrote:
>
> Shachar Shemesh <shachar at shemesh.biz> <shachar at shemesh.biz> writes:
>
>
>  On 17/05/13 10:13, Ghiora Drori wrote:
>
>     https://aws.amazon.com/glacier/#highlights
>     Quote: "Amazon Glacier is designed to provide average annual
>     durability of 99.999999999% "
>
>     If this is not good enough for you too bad.
>
>
> When you see someone, anyone, saying such a thing, run. As fast and as
> far as you can.
>
> This level of assurance is called "nine nines"(henceforth 9*9). It
> amounts to one thousandth of a second of downtime a year.
>
>  I think you are misreading the claim, Shachar. It is not about
> availablity, it is about "durability". I read it as a measure of the
> probability that your data will not be lost before a year passes.
>
>  You are right that this is not about availability. The previous response
> was my fuse jumping because of the pure ludiciority of people claiming 9*9
> availability. After reading the actual text, however, it is not clear what
> it is about.
>
> It is possible that this means that they will lose (on average) ten bits
> per Terabyte per year. If that is the case, honestly, this does not sound
> very good. Assuming they have several exabytes of customers data, this
> means that they have several actual cases of customer data lose all the
> time. Not a particularly good track record.
>
> Or, and this is the more likely scenario, they are talking out of their
> asses, and put the number in because it sounds impressive.
>
> Omer Zak wrote:
>
> IMO, the quote does not promise a nine nines assurance.
> It only says that Amazon Glacier WAS DESIGNED to provide this kind of
> assurance.
>
>  See my previous comment for why this is equally ludicrous.
>
> Shachar
>
>  Disclaimer: I have never used the service and th above is my "common
> sense and reading comprehension" take on what is written in the above
> website.
>
>
>
>


-- 
Mark Twain - "If you don't *read* the newspaper, you're *uninformed*. If
you *read* the newspaper, you're *mis*-*informed*."
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