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  <section id="far-far-away">
<span id="phk-farfaraway"></span><h1>Far, far away<a class="headerlink" href="#far-far-away" title="Link to this heading">¶</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 notranslate"><div class="highlight"><pre><span></span>                <span class="o">|</span>
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<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 brackets" href="#f1" id="id2" role="doc-noteref"><span class="fn-bracket">[</span>1<span class="fn-bracket">]</span></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>
<aside class="footnote-list brackets">
<aside class="footnote brackets" id="f1" role="doc-footnote">
<span class="label"><span class="fn-bracket">[</span><a role="doc-backlink" href="#id2">1</a><span class="fn-bracket">]</span></span>
<p>These <a class="reference external" href="https://archive.org/details/bstj-archives?&amp;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.</p>
</aside>
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