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Code Editor : farfaraway.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Far, far away — Varnish version 5.2.1 documentation</title> <link rel="stylesheet" href="../_static/classic.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '5.2.1', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="top" title="Varnish version 5.2.1 documentation" href="../index.html" /> <link rel="up" title="Poul-Hennings random outbursts" href="index.html" /> <link rel="next" title="Going fast slowly" href="thatslow.html" /> <link rel="prev" title="Trial&Error - Prototyping - Continous Integration" href="trialerror.html" /> </head> <body role="document"> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="thatslow.html" title="Going fast slowly" accesskey="N">next</a> |</li> <li class="right" > <a href="trialerror.html" title="Trial&Error - Prototyping - Continous Integration" accesskey="P">previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" accesskey="U">Poul-Hennings random outbursts</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="far-far-away"> <span id="phk-farfaraway"></span><h1>Far, far away<a class="headerlink" href="#far-far-away" title="Permalink to this headline">ΒΆ</a></h1> <p>I realize I'm showing my age when I admit that Slades 1974 hit <a class="reference external" href="https://www.youtube.com/watch?v=6gqCCAb8xbw">"Far Far Away"</a> was one of the first rock-ballads I truly loved. (In case you have never heard of Slade or the 1970'ies British glam-rock, you may want to protect your innocence and <em>not</em> click on that link.)</p> <p>Some years back I got invited to a conference in New Zealand, and that is "far far away" from Denmark. So far away in fact, that I downloaded the entire <a class="reference external" href="https://archive.org/details/bstj-archives">Bell Systems Technical Journal</a> to my Kobo eReader in order to have something to do during the 24 hour air-traffic "experience".</p> <p>BSTJ is good reading, for instance you learn that they invented <a class="reference external" href="https://archive.org/stream/bstj62-7-2365#page/n21/mode/2up">Agile Programming</a> back in 1983, but failed to come up with a hip name.</p> <p>Anyway, Internet Access in New Zealand is like time-travel back to around Y2K or so, and when one of my time-nuts friends launched a <a class="reference external" href="https://www.kickstarter.com/projects/1575992013/kiwisdr-beaglebone-software-defined-radio-sdr-with">Kickstarter project</a> it didn't take much before his residential connection folded.</p> <p>As it happens, I am in the process of setting up the new Varnish-Cache.org project server just now, generously sponsored/donated by <a class="reference external" href="https://www.RootBSD.com">RootBSD.com</a>, so it was natural for me to offer to help him out.</p> <p>I don't need to explain varnishhist to this audience:</p> <div class="highlight-default"><div class="highlight"><pre><span></span> <span class="o">|</span> <span class="o">|</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="o">||</span> <span class="c1">##</span> <span class="o">|||</span> <span class="c1">##</span> <span class="o">|||</span> <span class="c1"># ## #</span> <span class="o">|||||</span> <span class="c1"># #####</span> <span class="o">+-------+-------+-------+-------+-------+-------+-------+-------+-------</span> <span class="o">|</span><span class="mf">1e-6</span> <span class="o">|</span><span class="mf">1e-5</span> <span class="o">|</span><span class="mf">1e-4</span> <span class="o">|</span><span class="mf">1e-3</span> <span class="o">|</span><span class="mf">1e-2</span> <span class="o">|</span><span class="mf">1e-1</span> <span class="o">|</span><span class="mf">1e0</span> <span class="o">|</span><span class="mf">1e1</span> <span class="o">|</span><span class="mf">1e2</span> </pre></div> </div> <p>Most of us who live in civilized places, tend to forget that the InterNet is very unevenly distributed.</p> <p>My ISP enabled IPv6 on the VDSL2+ line to my beach-house today, some people have fiber, but in terms head-count, the majority of the world has really horrible internet connections.</p> <p>In some cases it is the last mile, for instance if you live out at some remote fjord in Norway.</p> <p>In other cases it is a mid-net bottle-neck, in the case of New Zealand a shortage of transoceanic fiber cables <a class="footnote-reference" href="#f1" id="id2">[1]</a> .</p> <p>Caching is not a cure-all, it is far from a miracle cure, even thought it might seem that way sometimes.</p> <p>But as prophylactic for bandwidth troubles, it is second to none.</p> <p>One of the goals of Varnish was that it should be easy to roll out in a crisis situation, start it, repoint your DNS, suffer less, tune it a little bit (usually: ignore cookies) and suffer a lot less.</p> <p>Today was a good sanity-check for me, trying exactly that.</p> <p>All in all it worked out pretty well, as the varnishhist above shows.</p> <p><em>phk</em></p> <table class="docutils footnote" frame="void" id="f1" rules="none"> <colgroup><col class="label" /><col /></colgroup> <tbody valign="top"> <tr><td class="label"><a class="fn-backref" href="#id2">[1]</a></td><td>These <a class="reference external" href="https://archive.org/details/bstj-archives?&and[]=bstj%20%201957-1-1">BSTJ articles about the first Atlantic phone cable</a> will give you an appreciation of why that is not a trivial problem to solve.</td></tr> </tbody> </table> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="trialerror.html" title="previous chapter">Trial&Error - Prototyping - Continous Integration</a></p> <h4>Next topic</h4> <p class="topless"><a href="thatslow.html" title="next chapter">Going fast slowly</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/phk/farfaraway.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="thatslow.html" title="Going fast slowly" >next</a> |</li> <li class="right" > <a href="trialerror.html" title="Trial&Error - Prototyping - Continous Integration" >previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" >Poul-Hennings random outbursts</a> »</li> </ul> </div> <div class="footer" role="contentinfo"> © Copyright 2010-2014, Varnish Software AS. 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