blog/Parallellizing_the_boot_in_Debian_Squeeze___ready_for_wider_testing.html

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   6     <title>Petter Reinholdtsen: Parallellizing the boot in Debian Squeeze - ready for wider testing</title>
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  12  <h1>
  13      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  14
  15  </h1>
  16
  17 </div>
  18
  19
  20     <div class="entry">
  21       <div class="title">Parallellizing the boot in Debian Squeeze - ready for wider testing</div>
  22       <div class="date"> 6th May 2010</div>
  23       <div class="body"><p>These days, the init.d script dependencies in Squeeze are quite
  24 complete, so complete that it is actually possible to run all the
  25 init.d scripts in parallell based on these dependencies.  If you want
  26 to test your Squeeze system, make sure
  27 <a href="http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot">dependency
  28 based boot sequencing</a> is enabled, and add this line to
  29 /etc/default/rcS:</p>
  30
  31 <blockquote><pre>
  32 CONCURRENCY=makefile
  33 </pre></blockquote>
  34
  35 <p>That is it.  It will cause sysv-rc to use the startpar tool to run
  36 scripts in parallel using the dependency information stored in
  37 /etc/init.d/.depend.boot, /etc/init.d/.depend.start and
  38 /etc/init.d/.depend.stop to order the scripts.  Startpar is configured
  39 to try to start the kdm and gdm scripts as early as possible, and will
  40 start the facilities required by kdm or gdm as early as possible to
  41 make this happen.</p>
  42
  43 <p>Give it a try, and see if you like the result.  If some services
  44 fail to start properly, it is most likely because they have incomplete
  45 init.d script dependencies in their startup script (or some of their
  46 dependent scripts have incomplete dependencies).  Report bugs and get
  47 the package maintainers to fix it. :)</p>
  48
  49 <p>Running scripts in parallel could be the default in Debian when we
  50 manage to get the init.d script dependencies complete and correct.  I
  51 expect we will get there in Squeeze+1, if we get manage to test and
  52 fix the remaining issues.</p>
  53
  54 <p>If you report any problems with dependencies in init.d scripts to
  55 the BTS, please usertag the report to get it to show up at
  56 <a href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org">the
  57 list of usertagged bugs related to this</a>.</p>
  58 </div>
  59
  60       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.</div>
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