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Code Editor : platforms.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>Picking platforms — 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="Security barriers in Varnish" href="barriers.html" /> <link rel="prev" title="What do you mean by 'backend' ?" href="backends.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="barriers.html" title="Security barriers in Varnish" accesskey="N">next</a> |</li> <li class="right" > <a href="backends.html" title="What do you mean by 'backend' ?" 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="picking-platforms"> <span id="phk-platforms"></span><h1>Picking platforms<a class="headerlink" href="#picking-platforms" title="Permalink to this headline">¶</a></h1> <p>Whenever you write Open Source Software, you have to make a choice of what platforms you are going to support.</p> <p>Generally you want to make your program as portable as possible and cover as many platforms, distros and weird computers as possible.</p> <p>But making your program run on everything is hard work very hard work.</p> <p>For instance, did you know that:</p> <blockquote> <div>sizeof(void*) != sizeof(void * const)</div></blockquote> <p>is legal in a ISO-C compliant environment ?</p> <p>Varnish <a class="reference external" href="http://hellarvik.com/node/66">runs on a Nokia N900</a> but I am not going to go out of my way to make sure that is always the case.</p> <p>To make sense for Varnish, a platform has to be able to deliver, both in terms of performance, but also in terms of the APIs we use to get that performance.</p> <p>In the FreeBSD project where I grew up, we ended up instituting platform-tiers, in an effort to document which platforms we cared about and which we did love quite as much.</p> <p>If we did the same for Varnish, the result would look something like:</p> <div class="section" id="a-platforms-we-care-about"> <h2>A - Platforms we care about<a class="headerlink" href="#a-platforms-we-care-about" title="Permalink to this headline">¶</a></h2> <p>We care about these platforms because our users use them and because they deliver a lot of bang for the buck with Varnish.</p> <p>These platforms are in our "tinderbox" tests, we use them ourselves and they pass all regression tests all the time. Platform specific bug reports gets acted on.</p> <p><em>FreeBSD</em></p> <p><em>Linux</em></p> <p>Obviously you can forget about running Varnish on your <a class="reference external" href="https://en.wikipedia.org/wiki/Linksys_WRT54G_series">WRT54G</a> but if you have a real computer, you can expect Varnish to work "ok or better" on any distro that has a package available.</p> </div> <div class="section" id="b-platforms-we-try-not-to-break"> <h2>B - Platforms we try not to break<a class="headerlink" href="#b-platforms-we-try-not-to-break" title="Permalink to this headline">¶</a></h2> <p>We try not to break these platforms, because they basically work, possibly with some footnotes or minor limitations, and they have an active userbase.</p> <p>We may or may not test on these platforms on a regular basis, or we may rely on contributors to alert us to problems. Platform specific bug reports without patches will likely live a quiet life.</p> <p><em>Mac OS/X</em></p> <p><em>Solaris-decendants</em> (Oracle Solaris, OmniOS, Joyent SmartOS)</p> <p>Mac OS/X is regarded as a developer platform, not as a production platform.</p> <p>Solaris-decendants are regarded as a production platform.</p> <p>NetBSD, AIX and HP-UX are conceivably candidates for this level, but so far I have not heard much, if any, user interest.</p> </div> <div class="section" id="c-platforms-we-tolerate"> <h2>C - Platforms we tolerate<a class="headerlink" href="#c-platforms-we-tolerate" title="Permalink to this headline">¶</a></h2> <p>We tolerate any other platform, as long as the burden of doing so is proportional to the benefit to the Varnish community.</p> <p>Do not file bug reports specific to these platforms without attaching a patch that solves the problem, we will just close it.</p> <p>For now, anything else goes here, certainly the N900 and the WRT54G.</p> <p>I'm afraid I have to put OpenBSD here for now, it is seriously behind on socket APIs and working around those issues is just not worth the effort.</p> <p>If people send us a small non-intrusive patches that makes Varnish run on these platforms, we'll take it.</p> <p>If they send us patches that reorganizes everything, hurts code readability, quality or just generally do not satisfy our taste, they get told that thanks, but no thanks.</p> </div> <div class="section" id="is-that-it-abandon-all-hope-etc"> <h2>Is that it ? Abandon all hope etc. ?<a class="headerlink" href="#is-that-it-abandon-all-hope-etc" title="Permalink to this headline">¶</a></h2> <p>These tiers are not static, if for some reason Varnish suddenly becomes a mandatory accessory to some technically sensible platform, (zOS anyone ?) that platform will get upgraded. If the pessimists are right about Oracles intentions, Solaris may get demoted.</p> <p>Until next time,</p> <p>Poul-Henning, 2010-08-03 Edited Nils, 2014-03-18 with Poul-Hennings consent</p> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../index.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">Picking platforms</a><ul> <li><a class="reference internal" href="#a-platforms-we-care-about">A - Platforms we care about</a></li> <li><a class="reference internal" href="#b-platforms-we-try-not-to-break">B - Platforms we try not to break</a></li> <li><a class="reference internal" href="#c-platforms-we-tolerate">C - Platforms we tolerate</a></li> <li><a class="reference internal" href="#is-that-it-abandon-all-hope-etc">Is that it ? Abandon all hope etc. ?</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="backends.html" title="previous chapter">What do you mean by 'backend' ?</a></p> <h4>Next topic</h4> <p class="topless"><a href="barriers.html" title="next chapter">Security barriers in Varnish</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/phk/platforms.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="barriers.html" title="Security barriers in Varnish" >next</a> |</li> <li class="right" > <a href="backends.html" title="What do you mean by 'backend' ?" >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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