blog/archive/2019/11/11.rss

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   4                 <title>Petter Reinholdtsen - Entries from November 2019</title>
   5                 <description>Entries from November 2019</description>
   6                 <link>http://www.hungry.com/~pere/blog/</link>
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  10                 <title>What would it cost to store all 2018 phone calls in Norway?</title>
  11                 <link>http://www.hungry.com/~pere/blog/What_would_it_cost_to_store_all_2018_phone_calls_in_Norway_.html</link>
  12                 <guid isPermaLink="true">http://www.hungry.com/~pere/blog/What_would_it_cost_to_store_all_2018_phone_calls_in_Norway_.html</guid>
  13                 <pubDate>Mon, 25 Nov 2019 20:15:00 +0100</pubDate>
  14                 <description>&lt;p&gt;Four years ago, I did a back of the envelope calculation on
  15 &lt;a href=&quot;https://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html&quot;&gt;how
  16 much it would cost to store audio recordings of all the phone calls in
  17 Norway&lt;/a&gt;, and came up with NOK 2.1 million / EUR 250 000 for the
  18 year 2013.  It is time to repeat the calculation using updated
  19 numbers.  The calculation is based on how much data storage is needed
  20 for each minute of audio, how many minutes all the calls in Norway
  21 sums up to, multiplied by the cost of data storage.&lt;/p&gt;
  22
  23 &lt;p&gt;The number of phone call minutes for 2018 was fetched from
  24 &lt;a href=&quot;https://ekomstatistikken.nkom.no/&quot;&gt;the NKOM statistics
  25 site&lt;/a&gt;, and for 2018, land line calls are listed as 434 238 000
  26 minutes, while mobile phone calls are listed with 7 542 006 000
  27 minutes.  The total number of minutes is thus 7 976 244 000.  For
  28 simplicity, I decided to ignore any advantages in audio compression the
  29 last four years, and continue to assume 60 Kbytes/min as the last
  30 time.&lt;/p&gt;
  31
  32 &lt;p&gt;Storage prices still varies a lot, but as last time, I decide to
  33 take a reasonable big and cheap hard drive, and double its price to
  34 include the surrounding costs into account.  A 10 TB disk cost less
  35 than 4500 NOK / 450 EUR these days, and doubling it give 9000 NOK per
  36 10 TB.&lt;/p&gt;
  37
  38 &lt;p&gt;So, with the parameters in place, lets update the old table
  39 estimating cost for calls in a given year:&lt;/p&gt;
  40
  41 &lt;table border=&quot;1&quot;&gt;
  42 &lt;tr&gt;&lt;th&gt;Year&lt;/th&gt;&lt;th&gt;Call minutes&lt;/th&gt;&lt;th&gt;Size&lt;/th&gt;&lt;th&gt;Price in NOK / EUR&lt;/th&gt;&lt;/tr&gt;
  43 &lt;tr&gt;&lt;td&gt;2005&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;24 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;1.3 PiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;1 170 000 / 117 000&lt;/td&gt;&lt;/tr&gt;
  44
  45 &lt;tr&gt;&lt;td&gt;2012&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;18 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;1.0 PiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;900 000 / 90 000&lt;/td&gt;&lt;/tr&gt;
  46
  47 &lt;tr&gt;&lt;td&gt;2013&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;17 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;950 TiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;855 000 / 85 500&lt;/td&gt;&lt;/tr&gt;
  48
  49 &lt;tr&gt;&lt;td&gt;2018&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;7 976 244 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;445 TiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;401 100 / 40 110&lt;/td&gt;&lt;/tr&gt;
  50 &lt;/table&gt;
  51
  52 &lt;p&gt;Both the cost of storage and the number of phone call minutes have
  53 dropped since the last time, bringing the cost down to a level where I
  54 guess even small organizations can afford to store the audio recording
  55 from every phone call taken in a year in Norway.  Of course, this is
  56 just the cost of buying the storage equipment.  Maintenance, need to
  57 be included as well, but the volume of a single year is about a single
  58 rack of hard drives, so it is not much more than I could fit in my own
  59 home.  Wonder how much the electricity bill would raise if I had that
  60 kind of storage?  I doubt it would be more than a few tens of thousand
  61 NOK per year.&lt;/p&gt;
  62 </description>
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