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[homepage.git] / blog / archive / 2009 / 06 / index.html

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@@ -71,6 +71,74 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?</p>
 </div>
  <div class="padding"></div>
 
+<div class="entry">
+ <div class="title">
+ <a href="../../../Debian_boots_quicker_and_quicker.html">Debian boots quicker and quicker</a>
+ </div>
+ <div class="date">
+  2009-06-24 21:40
+ </div>
+
+ <div class="body">
+  
+<p>I spent Monday and tuesday this week in London with a lot of the
+people involved in the boot system on Debian and Ubuntu, to see if we
+could find more ways to speed up the boot system.  This was an Ubuntu
+funded
+<a href="https://wiki.ubuntu.com/FoundationsTeam/BootPerformance/DebianUbuntuSprint">developer
+gathering</a>. It was quite productive.  We also discussed the future
+of boot systems, and ways to handle the increasing number of boot
+issues introduced by the Linux kernel becoming more and more
+asynchronous and event base.  The Ubuntu approach using udev and
+upstart might be a good way forward.  Time will show.</p>
+
+<p>Anyway, there are a few ways at the moment to speed up the boot
+process in Debian.  All of these should be applied to get a quick
+boot:</p>
+
+<ul>
+
+<li>Use dash as /bin/sh.</li>
+
+<li>Disable the init.d/hwclock*.sh scripts and make sure the hardware
+   clock is in UTC.</li>
+
+<li>Install and activate the insserv package to enable
+   <a href="http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot">dependency
+   based boot sequencing</a>, and enable concurrent booting.</li>
+
+</ul>
+
+These points are based on the Google summer of code work done by
+<a href="http://initscripts-ng.alioth.debian.org/soc2006-bootsystem/">Carlos
+Villegas</a>.
+
+<p>Support for makefile-style concurrency during boot was uploaded to
+unstable yesterday.  When we tested it, we were able to cut 6 seconds
+from the boot sequence.  It depend on very correct dependency
+declaration in all init.d scripts, so I expect us to find edge cases
+where the dependences in some scripts are slightly wrong when we start
+using this.</p>
+
+<p>On our IRC channel for this effort, #pkg-sysvinit, a new idea was
+introduced by Raphael Geissert today, one that could affect the
+startup speed as well.  Instead of starting some scripts concurrently
+from rcS.d/ and another set of scripts from rc2.d/, it would be
+possible to run a of them in the same process.  A quick way to test
+this would be to enable insserv and run 'mv /etc/rc2.d/S* /etc/rcS.d/;
+insserv'.  Will need to test if that work. :)</p>
+
+ </div>
+ <div class="tags">
+ 
+
+ 
+  Tags: <a href="../../../tags/debian">debian</a>, <a href="../../../tags/english">english</a>.
+ 
+ </div>
+</div>
+ <div class="padding"></div>
+
  <p style="text-align: right;"><a href="06.rss"><img src="../../../xml.gif" alt="RSS Feed" width="36" height="14"></a></p>
 
 
@@ -93,7 +161,7 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?</p>
 
 <li><a href="../../../archive/2009/05/">May (9)</a></li>
 
-<li><a href="../../../archive/2009/06/">June (1)</a></li>
+<li><a href="../../../archive/2009/06/">June (2)</a></li>
 
 </ul></li>
 
@@ -119,11 +187,11 @@ inneholdt i Iran hvis de ikke hadde hemmelige valg?</p>
 
  <li><a href="../../../tags/aros">aros (1)</a></li>
 
- <li><a href="../../../tags/debian">debian (11)</a></li>
+ <li><a href="../../../tags/debian">debian (12)</a></li>
 
  <li><a href="../../../tags/debian edu">debian edu (7)</a></li>
 
- <li><a href="../../../tags/english">english (12)</a></li>
+ <li><a href="../../../tags/english">english (13)</a></li>
 
  <li><a href="../../../tags/fiksgatami">fiksgatami (1)</a></li>