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<div class="moz-cite-prefix">On 17/05/13 11:43, Oleg Goldshmidt
wrote:<br>
</div>
<blockquote cite="mid:87fvxmov1x.fsf@goldshmidt.org" type="cite">
<pre wrap="">Shachar Shemesh <a class="moz-txt-link-rfc2396E" href="mailto:shachar@shemesh.biz"><shachar@shemesh.biz></a> writes:
</pre>
<blockquote type="cite">
<pre wrap="">On 17/05/13 10:13, Ghiora Drori wrote:
<a class="moz-txt-link-freetext" href="https://aws.amazon.com/glacier/#highlights">https://aws.amazon.com/glacier/#highlights</a>
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.
</pre>
</blockquote>
<pre wrap="">
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.</pre>
</blockquote>
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.<br>
<br>
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.<br>
<br>
Or, and this is the more likely scenario, they are talking out of
their asses, and put the number in because it sounds impressive.<br>
<br>
Omer Zak wrote:<br>
<blockquote type="cite">
<pre wrap="">IMO, the quote does not promise a nine nines assurance.
It only says that Amazon Glacier WAS DESIGNED to provide this kind of
assurance.
</pre>
</blockquote>
See my previous comment for why this is equally ludicrous.<br>
<br>
Shachar<br>
<blockquote cite="mid:87fvxmov1x.fsf@goldshmidt.org" type="cite">
<pre wrap="">
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.
</pre>
</blockquote>
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