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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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
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  21
  22     <div class="entry">
  23       <div class="title">Parallellizing the boot in Debian Squeeze - ready for wider testing</div>
  24       <div class="date"> 6th May 2010</div>
  25       <div class="body"><p>These days, the init.d script dependencies in Squeeze are quite
  26 complete, so complete that it is actually possible to run all the
  27 init.d scripts in parallell based on these dependencies.  If you want
  28 to test your Squeeze system, make sure
  29 <a href="http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot">dependency
  30 based boot sequencing</a> is enabled, and add this line to
  31 /etc/default/rcS:</p>
  32
  33 <blockquote><pre>
  34 CONCURRENCY=makefile
  35 </pre></blockquote>
  36
  37 <p>That is it.  It will cause sysv-rc to use the startpar tool to run
  38 scripts in parallel using the dependency information stored in
  39 /etc/init.d/.depend.boot, /etc/init.d/.depend.start and
  40 /etc/init.d/.depend.stop to order the scripts.  Startpar is configured
  41 to try to start the kdm and gdm scripts as early as possible, and will
  42 start the facilities required by kdm or gdm as early as possible to
  43 make this happen.</p>
  44
  45 <p>Give it a try, and see if you like the result.  If some services
  46 fail to start properly, it is most likely because they have incomplete
  47 init.d script dependencies in their startup script (or some of their
  48 dependent scripts have incomplete dependencies).  Report bugs and get
  49 the package maintainers to fix it. :)</p>
  50
  51 <p>Running scripts in parallel could be the default in Debian when we
  52 manage to get the init.d script dependencies complete and correct.  I
  53 expect we will get there in Squeeze+1, if we get manage to test and
  54 fix the remaining issues.</p>
  55
  56 <p>If you report any problems with dependencies in init.d scripts to
  57 the BTS, please usertag the report to get it to show up at
  58 <a href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org">the
  59 list of usertagged bugs related to this</a>.</p>
  60 </div>
  61
  62       <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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