From: Petter Reinholdtsen Date: Sat, 2 May 2015 08:00:51 +0000 (+0200) Subject: Generated. X-Git-Url: https://pere.pagekite.me/gitweb/homepage.git/commitdiff_plain/9153012e94bb7227519a86de759973365cdabfab?ds=inline Generated. --- diff --git a/blog/archive/2015/05/05.rss b/blog/archive/2015/05/05.rss new file mode 100644 index 0000000000..77904f681a --- /dev/null +++ b/blog/archive/2015/05/05.rss @@ -0,0 +1,67 @@ + + + + Petter Reinholdtsen - Entries from May 2015 + Entries from May 2015 + http://people.skolelinux.org/pere/blog/ + + + + What would it cost to store all phone calls in Norway? + http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html + http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html + Fri, 1 May 2015 19:30:00 +0200 + <p>Many years ago, a friend of mine calculated how much it would cost +to store the sound of all phone calls in Norway, and came up with the +cost of around 20 million NOK (2.4 mill EUR) for all the calls in a +year. I got curious and wondered what the same calculation would look +like today. To do so one need an idea of how much data storage is +needed for each minute of sound, how many minutes all the calls in +Norway sums up to, and the cost of data storage.</p> + +<p>The 2005 numbers are from +<a href="http://www.digi.no/analyser/2005/10/04/vi-prater-stadig-mindre-i-roret">digi.no</a>, +the 2012 numbers are from +<a href="http://www.nkom.no/aktuelt/nyheter/fortsatt-vekst-i-det-norske-ekommarkedet">a +NKOM report</a>, and I got the 2013 numbers after asking NKOM via +email. I was told the numbers for 2014 will be presented May 20th, +and decided not to wait for those, as I doubt they will be very +different from the numbers from 2013.</p> + +<p>The amount of data storage per minute sound depend on the wanted +quality, and for phone calls it is generally believed that 8 Kbit/s is +enough. See for example a +<a href="http://www.cisco.com/c/en/us/support/docs/voice/voice-quality/7934-bwidth-consume.html#topic1">summary +on voice quality from Cisco</a> for some alternatives. 8 Kbit/s is 60 +Kbytes/min, and this can be multiplied with the number of call minutes +to get the storage requirements.</p> + +<p>Storage prices varies a lot, depending on speed, backup strategies, +availability requirements etc. But a simple way to calculate can be +to use the price of a TiB-disk (around 1000 NOK / 120 EUR) and double +it to take space, power and redundancy. It could be much higher with +high speed and good redundancy requirements.</p> + +<p>But back to the question, What would it cost to store all phone +calls in Norway? Not much. Here is a small table showing the +estimated cost, which is within the budget constraint of most medium +and large organisations:</p> + +<table border="1"> +<tr><th>Year</th><th>Call minutes</th><th>Size</th><th>Price in NOK / EUR</th></tr> +<tr><td>2005</td><td align="right">24 000 000 000</td><td align="right">1.3 PiB</td><td align="right">3 mill / 358 000</td></tr> +<tr><td>2012</td><td align="right">18 000 000 000</td><td align="right">1.0 PiB</td><td align="right">2.2 mill / 262 000</td></tr> +<tr><td>2013</td><td align="right">17 000 000 000</td><td align="right">950 TiB</td><td align="right">2.1 mill/ 250 000</td></tr> +</table> + +<p>This is the cost of buying the storage. Maintenance need to be +taken into account too, but calculating that is left as an exercise +for the reader. But it is obvious to me from those numbers that +recording the sound of all phone calls in Norway is not going to be +stopped because it is too expensive. I wonder if someone already is +collecting the data?</p> + + + + + diff --git a/blog/archive/2015/05/index.html b/blog/archive/2015/05/index.html new file mode 100644 index 0000000000..6cfe2180ce --- /dev/null +++ b/blog/archive/2015/05/index.html @@ -0,0 +1,427 @@ + + + + + Petter Reinholdtsen: entries from May 2015 + + + + + + +
+

+ Petter Reinholdtsen + +

+ +
+ + +

Entries from May 2015.

+ +
+
+ What would it cost to store all phone calls in Norway? +
+
+ 1st May 2015 +
+
+

Many years ago, a friend of mine calculated how much it would cost +to store the sound of all phone calls in Norway, and came up with the +cost of around 20 million NOK (2.4 mill EUR) for all the calls in a +year. I got curious and wondered what the same calculation would look +like today. To do so one need an idea of how much data storage is +needed for each minute of sound, how many minutes all the calls in +Norway sums up to, and the cost of data storage.

+ +

The 2005 numbers are from +digi.no, +the 2012 numbers are from +a +NKOM report, and I got the 2013 numbers after asking NKOM via +email. I was told the numbers for 2014 will be presented May 20th, +and decided not to wait for those, as I doubt they will be very +different from the numbers from 2013.

+ +

The amount of data storage per minute sound depend on the wanted +quality, and for phone calls it is generally believed that 8 Kbit/s is +enough. See for example a +summary +on voice quality from Cisco for some alternatives. 8 Kbit/s is 60 +Kbytes/min, and this can be multiplied with the number of call minutes +to get the storage requirements.

+ +

Storage prices varies a lot, depending on speed, backup strategies, +availability requirements etc. But a simple way to calculate can be +to use the price of a TiB-disk (around 1000 NOK / 120 EUR) and double +it to take space, power and redundancy. It could be much higher with +high speed and good redundancy requirements.

+ +

But back to the question, What would it cost to store all phone +calls in Norway? Not much. Here is a small table showing the +estimated cost, which is within the budget constraint of most medium +and large organisations:

+ + + + + + +
YearCall minutesSizePrice in NOK / EUR
200524 000 000 0001.3 PiB3 mill / 358 000
201218 000 000 0001.0 PiB2.2 mill / 262 000
201317 000 000 000950 TiB2.1 mill/ 250 000
+ +

This is the cost of buying the storage. Maintenance need to be +taken into account too, but calculating that is left as an exercise +for the reader. But it is obvious to me from those numbers that +recording the sound of all phone calls in Norway is not going to be +stopped because it is too expensive. I wonder if someone already is +collecting the data?

+ +
+
+ + + Tags: english, personvern, surveillance. + + +
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