blog/Quicker_Debian_installations_using_eatmydata.html

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   6     <title>Petter Reinholdtsen: Quicker Debian installations using eatmydata</title>
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  14  <h1>
  15      <a href="https://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <div class="entry">
  23       <div class="title">Quicker Debian installations using eatmydata</div>
  24       <div class="date">25th November 2016</div>
  25       <div class="body"><p>Two years ago, I did some experiments with eatmydata and the Debian
  26 installation system, observing how using
  27 <a href="http://people.skolelinux.org/pere/blog/Speeding_up_the_Debian_installer_using_eatmydata_and_dpkg_divert.html">eatmydata
  28 could speed up the installation</a> quite a bit.  My testing measured
  29 speedup around 20-40 percent for Debian Edu, where we install around
  30 1000 packages from within the installer.  The eatmydata package
  31 provide a way to disable/delay file system flushing.  This is a bit
  32 risky in the general case, as files that should be stored on disk will
  33 stay only in memory a bit longer than expected, causing problems if a
  34 machine crashes at an inconvenient time.  But for an installation, if
  35 the machine crashes during installation the process is normally
  36 restarted, and avoiding disk operations as much as possible to speed
  37 up the process make perfect sense.
  38
  39 <p>I added code in the Debian Edu specific installation code to enable
  40 <a href="https://tracker.debian.org/pkg/libeatmydata">eatmydata</a>,
  41 but did not have time to push it any further.  But a few months ago I
  42 picked it up again and worked with the libeatmydata package maintainer
  43 Mattia Rizzolo to make it easier for everyone to get this installation
  44 speedup in Debian.  Thanks to our cooperation There is now an
  45 eatmydata-udeb package in Debian testing and unstable, and simply
  46 enabling/installing it in debian-installer (d-i) is enough to get the
  47 quicker installations.  It can be enabled using preseeding.  The
  48 following untested kernel argument should do the trick:</p>
  49
  50 <blockquote><pre>
  51 preseed/early_command="anna-install eatmydata-udeb"
  52 </pre></blockquote>
  53
  54 <p>This should ask d-i to install the package inside the d-i
  55 environment early in the installation sequence.  Having it installed
  56 in d-i in turn will make sure the relevant scripts are called just
  57 after debootstrap filled /target/ with the freshly installed Debian
  58 system to configure apt to run dpkg with eatmydata.  This is enough to
  59 speed up the installation process.  There is a proposal to
  60 <a href="https://bugs.debian.org/841153">extend the idea a bit further
  61 by using /etc/ld.so.preload instead of apt.conf</a>, but I have not
  62 tested its impact.</p>
  63
  64 </div>
  65
  66       <div class="tags">Tags: <a href="https://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="https://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="https://people.skolelinux.org/pere/blog/tags/english">english</a>.</div>
  67
  68
  69     </div>
  70
  71
  72
  73
  74     <div id="sidebar">
  75
  76
  77
  78 <h2>Archive</h2>
  79 <ul>
  80
  81 <li>2023
  82 <ul>
  83
  84 <li><a href="https://people.skolelinux.org/pere/blog/archive/2023/01/">January (2)</a></li>
  85
  86 </ul></li>
  87
  88 <li>2022
  89 <ul>
  90
  91 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/02/">February (1)</a></li>
  92
  93 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/03/">March (3)</a></li>
  94
  95 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/04/">April (2)</a></li>
  96
  97 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/06/">June (2)</a></li>
  98
  99 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/07/">July (1)</a></li>
 100
 101 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/09/">September (1)</a></li>
 102
 103 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/10/">October (1)</a></li>
 104
 105 <li><a href="https://people.skolelinux.org/pere/blog/archive/2022/12/">December (1)</a></li>
 106
 107 </ul></li>
 108
 109 <li>2021
 110 <ul>
 111
 112 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/01/">January (2)</a></li>
 113
 114 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/02/">February (1)</a></li>
 115
 116 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/05/">May (1)</a></li>
 117
 118 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/06/">June (1)</a></li>
 119
 120 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/07/">July (3)</a></li>
 121
 122 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/08/">August (1)</a></li>
 123
 124 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/09/">September (1)</a></li>
 125
 126 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/10/">October (1)</a></li>
 127
 128 <li><a href="https://people.skolelinux.org/pere/blog/archive/2021/12/">December (1)</a></li>
 129
 130 </ul></li>
 131
 132 <li>2020
 133 <ul>
 134
 135 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 136
 137 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 138
 139 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 140
 141 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/05/">May (3)</a></li>
 142
 143 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/06/">June (2)</a></li>
 144
 145 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/07/">July (1)</a></li>
 146
 147 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/09/">September (1)</a></li>
 148
 149 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/10/">October (1)</a></li>
 150
 151 <li><a href="https://people.skolelinux.org/pere/blog/archive/2020/11/">November (1)</a></li>
 152
 153 </ul></li>
 154
 155 <li>2019
 156 <ul>
 157
 158 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 159
 160 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 161
 162 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 163
 164 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 165
 166 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 167
 168 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 169
 170 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 171
 172 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 173
 174 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 175
 176 <li><a href="https://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 177
 178 </ul></li>
 179
 180 <li>2018
 181 <ul>
 182
 183 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 184
 185 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 186
 187 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 188
 189 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 190
 191 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 192
 193 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 194
 195 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 196
 197 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 198
 199 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 200
 201 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 202
 203 <li><a href="https://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 204
 205 </ul></li>
 206
 207 <li>2017
 208 <ul>
 209
 210 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 211
 212 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 213
 214 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 215
 216 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 217
 218 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 219
 220 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 221
 222 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 223
 224 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 225
 226 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 227
 228 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 229
 230 <li><a href="https://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 231
 232 </ul></li>
 233
 234 <li>2016
 235 <ul>
 236
 237 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 238
 239 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 240
 241 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 242
 243 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 244
 245 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 246
 247 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 248
 249 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 250
 251 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 252
 253 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 254
 255 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 256
 257 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 258
 259 <li><a href="https://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 260
 261 </ul></li>
 262
 263 <li>2015
 264 <ul>
 265
 266 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 267
 268 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 269
 270 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 271
 272 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 273
 274 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 275
 276 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 277
 278 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 279
 280 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 281
 282 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 283
 284 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 285
 286 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 287
 288 <li><a href="https://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 289
 290 </ul></li>
 291
 292 <li>2014
 293 <ul>
 294
 295 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 296
 297 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 298
 299 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 300
 301 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 302
 303 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 304
 305 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 306
 307 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 308
 309 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 310
 311 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 312
 313 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 314
 315 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 316
 317 <li><a href="https://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 318
 319 </ul></li>
 320
 321 <li>2013
 322 <ul>
 323
 324 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 325
 326 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 327
 328 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 329
 330 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 331
 332 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 333
 334 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 335
 336 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 337
 338 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 339
 340 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 341
 342 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 343
 344 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 345
 346 <li><a href="https://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 347
 348 </ul></li>
 349
 350 <li>2012
 351 <ul>
 352
 353 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 354
 355 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 356
 357 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 358
 359 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 360
 361 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 362
 363 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 364
 365 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 366
 367 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 368
 369 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 370
 371 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 372
 373 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 374
 375 <li><a href="https://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 376
 377 </ul></li>
 378
 379 <li>2011
 380 <ul>
 381
 382 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 383
 384 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 385
 386 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 387
 388 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 389
 390 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 391
 392 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 393
 394 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 395
 396 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 397
 398 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 399
 400 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 401
 402 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 403
 404 <li><a href="https://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 405
 406 </ul></li>
 407
 408 <li>2010
 409 <ul>
 410
 411 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 412
 413 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 414
 415 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 416
 417 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 418
 419 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 420
 421 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 422
 423 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 424
 425 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 426
 427 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 428
 429 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 430
 431 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 432
 433 <li><a href="https://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 434
 435 </ul></li>
 436
 437 <li>2009
 438 <ul>
 439
 440 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 441
 442 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 443
 444 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 445
 446 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 447
 448 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 449
 450 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 451
 452 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 453
 454 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 455
 456 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 457
 458 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 459
 460 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 461
 462 <li><a href="https://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 463
 464 </ul></li>
 465
 466 <li>2008
 467 <ul>
 468
 469 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 470
 471 <li><a href="https://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 472
 473 </ul></li>
 474
 475 </ul>
 476
 477
 478
 479 <h2>Tags</h2>
 480 <ul>
 481
 482  <li><a href="https://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (19)</a></li>
 483
 484  <li><a href="https://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 485
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 617     </div>
 618     <p style="text-align: right">
 619  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 620 </p>
 621
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