<link>http://people.skolelinux.org/pere/blog/</link>
<atom:link href="http://people.skolelinux.org/pere/blog/index.rss" rel="self" type="application/rss+xml" />
+ <item>
+ <title>What would it cost to store all 2018 phone calls in Norway?</title>
+ <link>http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_2018_phone_calls_in_Norway_.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_2018_phone_calls_in_Norway_.html</guid>
+ <pubDate>Mon, 25 Nov 2019 20:10:00 +0100</pubDate>
+ <description><p>Four years ago, I did a back of the envelope calculation on
+<a href="http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html">how
+much it would cost to store audio recordings of all the phone calls in
+Norway</a>, and came up with NOK 2.1 million / EUR 250 000 for the
+year 2013. It is time to repeat the calculation using updated
+numbers. The calculation is based on how much data storage is needed
+for each minute of audio, how many minutes all the calls in Norway
+sums up to, multiplied by the cost of data storage.</p>
+
+<p>The number of phone call minutes for 2018 was fetched from
+<a href="https://ekomstatistikken.nkom.no/">the NKOM statistics
+site</a>, and for 2018, land line calls are listed as 434 238 000
+minutes, while mobile phone calls are listed with 7 542 006 000
+minutes. The total number of minues is thus 7 976 244 000. For
+simplicity, I decided to ignore any advantages in audio compression te
+last four years, and continue to assume 60 Kbytes/min as the last
+time.</p>
+
+<p>Storage prices still varies a lot, but as last time, I decide to
+take a reasonable big and cheap hard drive, and double its price to
+include the surrounding costs into account. A 10 TB disk cost less
+than 4500 NOK / 450 EUR these days, and doubling it give 9000 NOK per
+10 TB.</p>
+
+<p>So, with the parameters in place, lets update the old table
+estimating cost for calls in a given year:</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">1 170 000 / 117 000</td></tr>
+
+<tr><td>2012</td><td align="right">18 000 000 000</td><td align="right">1.0 PiB</td><td align="right">900 000 / 90 000</td></tr>
+
+<tr><td>2013</td><td align="right">17 000 000 000</td><td align="right">950 TiB</td><td align="right">855 000 / 85 500</td></tr>
+
+<tr><td>2018</td><td align="right">7 976 244 000</td><td align="right">445 TiB</td><td align="right">401 100 / 40 110</td></tr>
+</table>
+
+<p>Both the cost of storage and the number of phone call minutes have
+dropped since the last time, bringing the cost down to a level where I
+guess even small organizations can afford to store the audio recording
+from every phone call taken in a year in Norway. Of course, this is
+just the cost of buying the storage equipment. Maintenance, need to
+be included as well, but the volume of a single year is about a single
+rack of hard drives, so it is not much more than I could fit in my own
+home. Wonder how much the electricity bill would raise if I had that
+kind of storage? I doubt it would be more than a few tens of thousand
+NOK per year.</p>
+</description>
+ </item>
+
<item>
<title>Norwegian movies that might be legal to share on the Internet</title>
<link>http://people.skolelinux.org/pere/blog/Norwegian_movies_that_might_be_legal_to_share_on_the_Internet.html</link>
<a href="https://hackaday.io/project/164082-the-dark-side-challenge">The
Dark Side Challenge</a> Hackaday web pages.</p>
-<p>As usual, if you use Bitcoin and want to show your support of my
-activities, please send Bitcoin donations to my address
-<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
-</description>
- </item>
-
- <item>
- <title>Nikita version 0.4 released - free software archive API server</title>
- <link>http://people.skolelinux.org/pere/blog/Nikita_version_0_4_released___free_software_archive_API_server.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Nikita_version_0_4_released___free_software_archive_API_server.html</guid>
- <pubDate>Wed, 22 May 2019 11:30:00 +0200</pubDate>
- <description><p>This morning, a new release of
-<a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core/">Nikita
-Noark 5 core project</a> was
-<a href="https://lists.nuug.no/pipermail/nikita-noark/2019-May/000468.html">announced
-on the project mailing list</a>. The Nikita free software solution is
-an implementation of the Norwegian archive standard Noark 5 used by
-government offices in Norway. These were the changes in version 0.4
-since version 0.3, see the email link above for links to a demo site:</p>
-
-<ul>
-
- <li>Roll out OData handling to all endpoints where applicable</li>
- <li>Changed the relation key for "ny-journalpost" to the official one.</li>
- <li>Better link generation on outgoing links.</li>
- <li>Tidy up code and make code and approaches more consistent throughout
- the codebase</li>
- <li>Update rels to be in compliance with updated version in the
- interface standard</li>
- <li>Avoid printing links on empty objects as they can't have links</li>
- <li>Small bug fixes and improvements</li>
- <li>Start moving generation of outgoing links to @Service layer so access
- control can be used when generating links</li>
- <li>Log exception that was being swallowed so it's traceable</li>
- <li>Fix name mapping problem</li>
- <li>Update templated printing so templated should only be printed if it
- is set true. Requires more work to roll out across entire
- application.</li>
- <li>Remove Record->DocumentObject as per domain model of n5v4</li>
- <li>Add ability to delete lists filtered with OData</li>
- <li>Return NO_CONTENT (204) on delete as per interface standard</li>
- <li>Introduce support for ConstraintViolationException exception</li>
- <li>Make Service classes extend NoarkService</li>
- <li>Make code base respect X-Forwarded-Host, X-Forwarded-Proto and
- X-Forwarded-Port</li>
- <li>Update CorrespondencePart* code to be more in line with Single
- Responsibility Principle</li>
- <li>Make package name follow directory structure</li>
- <li>Make sure Document number starts at 1, not 0</li>
- <li>Fix isues discovered by FindBugs</li>
- <li>Update from Date to ZonedDateTime</li>
- <li>Fix wrong tablename</li>
- <li>Introduce Service layer tests</li>
- <li>Improvements to CorrespondencePart</li>
- <li>Continued work on Class / Classificationsystem</li>
- <li>Fix feature where authors were stored as storageLocations</li>
- <li>Update HQL builder for OData</li>
- <li>Update OData search capability from webpage</li>
-
-</ul>
-
-<p>If free and open standardized archiving API sound interesting to
-you, please contact us on IRC
-(<a href="irc://irc.freenode.net/%23nikita">#nikita on
-irc.freenode.net</a>) or email
-(<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">nikita-noark
-mailing list</a>).</p>
-
<p>As usual, if you use Bitcoin and want to show your support of my
activities, please send Bitcoin donations to my address
<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
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