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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-308/">SRE Weekly Issue #308</a></h1>
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<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-308/">February 6, 2022</a>
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<div class="sreweekly-title"><a href="https://hacks.mozilla.org/2022/02/retrospective-and-technical-details-on-the-recent-firefox-outage/" target="_blank" rel="noopener">Retrospective and Technical Details on the recent Firefox Outage</a></div>
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<p>Oh, now this is fascinating. Firefox, like, the web browser itself, had an outage in January. It just stopped working for everyone.</p>
<p>  <small>Christian Holler — Mozilla</small></p>
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<div class="sreweekly-title"><a href="https://softwaremill.com/what-is-cap-theorem/" target="_blank" rel="noopener">What is CAP Theorem?</a></div>
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<p>If you&#8217;re looking for an explainer on the CAP theorem, this article gives a great overview with practical details.</p>
<p>  <small>Bartłomiej Żyliński — SoftwareMill</small></p>
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<div class="sreweekly-title"><a href="https://securityboulevard.com/2021/12/stealing-more-sre-ideas-for-your-soc/" target="_blank" rel="noopener">Stealing More SRE Ideas for Your SOC</a></div>
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<p>This is about what the security field can learn from SRE. Obviously not directly applicable to SRE, but this article gives us a really great outside perspective.</p>
<p>&nbsp;&nbsp;<small>Anton Chuvakin — Security Boulevard</small></p>
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<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2022/01/23/bitrot/" target="_blank" rel="noopener">Bitrot</a></div>
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<p>Code doesn&#8217;t &#8220;rot&#8221;, but the environment around it changes constantly.</p>
<p>&nbsp;&nbsp;<small>Lorin Hochstein</small></p>
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<div class="sreweekly-title"><a href="https://alexewerlof.medium.com/calculating-composite-sla-d855eaf2c655" target="_blank" rel="noopener">Calculating composite SLA</a></div>
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<p>How do complex service dependencies affect your SLA? What if service A depends on service B <em>and</em> C being up, but service D <em>or</em> E being up?</p>
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<p>TLDR; for serial, multiply availability; For parallels, multiply unavailability.</p>
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<p>&nbsp;&nbsp;<small>Alex Ewerlöf</small></p>
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<div class="sreweekly-title"><a href="https://incident.io/blog/no-capes" target="_blank" rel="noopener">No capes: the perils of being a hero-engineer</a></div>
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<p>Here&#8217;s how and why not to be a hero. It&#8217;s bad for you and everyone else too.</p>
<p>&nbsp;&nbsp;<small>Isaac Seymour — incident.io</small></p>
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