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   6     <title>Petter Reinholdtsen: entries from May 2015</title>
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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <h3>Entries from May 2015.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html">What would it cost to store all phone calls in Norway?</a>
  27       </div>
  28       <div class="date">
  29          1st May 2015
  30       </div>
  31       <div class="body">
  32         <p>Many years ago, a friend of mine calculated how much it would cost
  33 to store the sound of all phone calls in Norway, and came up with the
  34 cost of around 20 million NOK (2.4 mill EUR) for all the calls in a
  35 year.  I got curious and wondered what the same calculation would look
  36 like today.  To do so one need an idea of how much data storage is
  37 needed for each minute of sound, how many minutes all the calls in
  38 Norway sums up to, and the cost of data storage.</p>
  39
  40 <p>The 2005 numbers are from
  41 <a href="http://www.digi.no/analyser/2005/10/04/vi-prater-stadig-mindre-i-roret">digi.no</a>,
  42 the 2012 numbers are from
  43 <a href="http://www.nkom.no/aktuelt/nyheter/fortsatt-vekst-i-det-norske-ekommarkedet">a
  44 NKOM report</a>, and I got the 2013 numbers after asking NKOM via
  45 email.  I was told the numbers for 2014 will be presented May 20th,
  46 and decided not to wait for those, as I doubt they will be very
  47 different from the numbers from 2013.</p>
  48
  49 <p>The amount of data storage per minute sound depend on the wanted
  50 quality, and for phone calls it is generally believed that 8 Kbit/s is
  51 enough.  See for example a
  52 <a href="http://www.cisco.com/c/en/us/support/docs/voice/voice-quality/7934-bwidth-consume.html#topic1">summary
  53 on voice quality from Cisco</a> for some alternatives.  8 Kbit/s is 60
  54 Kbytes/min, and this can be multiplied with the number of call minutes
  55 to get the storage requirements.</p>
  56
  57 <p>Storage prices varies a lot, depending on speed, backup strategies,
  58 availability requirements etc.  But a simple way to calculate can be
  59 to use the price of a TiB-disk (around 1000 NOK / 120 EUR) and double
  60 it to take space, power and redundancy into account.  It could be much
  61 higher with high speed and good redundancy requirements.</p>
  62
  63 <p>But back to the question, What would it cost to store all phone
  64 calls in Norway?  Not much.  Here is a small table showing the
  65 estimated cost, which is within the budget constraint of most medium
  66 and large organisations:</p>
  67
  68 <table border="1">
  69 <tr><th>Year</th><th>Call minutes</th><th>Size</th><th>Price in NOK / EUR</th></tr>
  70 <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>
  71 <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>
  72 <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>
  73 </table>
  74
  75 <p>This is the cost of buying the storage.  Maintenance need to be
  76 taken into account too, but calculating that is left as an exercise
  77 for the reader.  But it is obvious to me from those numbers that
  78 recording the sound of all phone calls in Norway is not going to be
  79 stopped because it is too expensive.  I wonder if someone already is
  80 collecting the data?</p>
  81
  82       </div>
  83       <div class="tags">
  84
  85
  86         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
  87
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  95
  96
  97
  98 <h2>Archive</h2>
  99 <ul>
 100
 101 <li>2015
 102 <ul>
 103
 104 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 105
 106 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 107
 108 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 109
 110 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 111
 112 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (1)</a></li>
 113
 114 </ul></li>
 115
 116 <li>2014
 117 <ul>
 118
 119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 120
 121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 122
 123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 126
 127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 128
 129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 130
 131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 132
 133 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 134
 135 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 136
 137 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 138
 139 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 140
 141 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 142
 143 </ul></li>
 144
 145 <li>2013
 146 <ul>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 157
 158 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 159
 160 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 161
 162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 163
 164 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 165
 166 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 167
 168 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 169
 170 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 171
 172 </ul></li>
 173
 174 <li>2012
 175 <ul>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 184
 185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 186
 187 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 188
 189 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 190
 191 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 192
 193 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 194
 195 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 196
 197 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 198
 199 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 200
 201 </ul></li>
 202
 203 <li>2011
 204 <ul>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 213
 214 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 215
 216 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 217
 218 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 219
 220 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 221
 222 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 223
 224 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 225
 226 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 227
 228 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 229
 230 </ul></li>
 231
 232 <li>2010
 233 <ul>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 240
 241 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 242
 243 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 244
 245 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 246
 247 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 248
 249 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 250
 251 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 252
 253 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 254
 255 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 256
 257 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 258
 259 </ul></li>
 260
 261 <li>2009
 262 <ul>
 263
 264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 265
 266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 269
 270 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 271
 272 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 273
 274 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 275
 276 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 277
 278 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 279
 280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 281
 282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 283
 284 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 285
 286 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 287
 288 </ul></li>
 289
 290 <li>2008
 291 <ul>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 296
 297 </ul></li>
 298
 299 </ul>
 300
 301
 302
 303 <h2>Tags</h2>
 304 <ul>
 305
 306  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 307
 308  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 309
 310  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 311
 312  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 313
 314  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (8)</a></li>
 315
 316  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (15)</a></li>
 317
 318  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 319
 320  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 321
 322  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (109)</a></li>
 323
 324  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (153)</a></li>
 325
 326  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 327
 328  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (15)</a></li>
 329
 330  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (13)</a></li>
 331
 332  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 333
 334  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (276)</a></li>
 335
 336  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 337
 338  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 339
 340  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (15)</a></li>
 341
 342  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 343
 344  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (14)</a></li>
 345
 346  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 347
 348  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (10)</a></li>
 349
 350  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (19)</a></li>
 351
 352  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 353
 354  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 355
 356  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 357
 358  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 359
 360  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 361
 362  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (32)</a></li>
 363
 364  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (260)</a></li>
 365
 366  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (176)</a></li>
 367
 368  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (16)</a></li>
 369
 370  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 371
 372  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (51)</a></li>
 373
 374  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (84)</a></li>
 375
 376  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 377
 378  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 379
 380  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 381
 382  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 383
 384  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (9)</a></li>
 385
 386  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 387
 388  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 389
 390  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 391
 392  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (41)</a></li>
 393
 394  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 395
 396  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 397
 398  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (46)</a></li>
 399
 400  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 401
 402  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (9)</a></li>
 403
 404  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (31)</a></li>
 405
 406  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (2)</a></li>
 407
 408  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 409
 410  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
 411
 412  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (50)</a></li>
 413
 414  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 415
 416  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (35)</a></li>
 417
 418 </ul>
 419
 420
 421     </div>
 422     <p style="text-align: right">
 423  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
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