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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-84/">SRE Weekly Issue #84</a></h1>
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<div class="entry-date" itemprop="datePublished" >
<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-84/">August 6, 2017</a>
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<a href="https://sreweekly.com/sre-weekly-issue-84/" title="Permalink to SRE Weekly Issue #84" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 55%; color: #b0b0b0;">SPONSOR MESSAGE</h2>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dastergon.github.io/availability-calculator/" target="_blank">Availability Calculator</a></div>
<div class="sreweekly-description">
<p>How many minutes per month is 99.95% availability? What about 99.957%? Here&#8217;s a tool that&#8217;ll give you a quick answer, by the author of <a href="https://github.com/dastergon/awesome-sre">awesome-sre</a>.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/chaos-engineering-a-lesson-from-the-experts" target="_blank">Chaos Engineering: A Lesson From the Experts &#8211; DZone Performance</a></div>
<div class="sreweekly-description">
<p>This article is a partial transcript of Catchpoint&#8217;s <a href="http://pages.catchpoint.com/AMA-Chaos-DiRT.html">Chaos Engineering and DiRT AMA</a>.</p>
<blockquote><p>In chaos engineering, we’re saying, “Look, these systems are just too complicated at this point to reasonably expect an engineer to know all of the properties that a system has.”</p></blockquote>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.enterpriseirregulars.com/117624/production-test-lab-canarying/" target="_blank">When production is your test lab – what is &#8220;canarying&#8221;?</a></div>
<div class="sreweekly-description">
<p>Somewhat intro-level, but I like this little gem:</p>
<blockquote><p>[&#8230;] we have to put some requests at risk for the sake of protecting our overall availability. We want to keep that risk to a minimum. This raises the question: What is the smallest experiment we can run that still gives us confidence in the result?”</p></blockquote>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/designing-for-scale-part-3-scaling-under-stress" target="_blank">Designing for Scale, Part 3: Scaling Under Stress</a></div>
<div class="sreweekly-description">
<p>This article chronicles New Relic&#8217;s attempt to test a new system to prove that it was ready for production.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://bravenewgeek.com/fifo-exactly-once-and-other-costs/" target="_blank">FIFO, Exactly-Once, and Other Costs</a></div>
<div class="sreweekly-description">
<p>SQS, Kafka, and others tout features like &#8220;exactly once&#8221; and &#8220;FIFO&#8221;, but there are necessarily some pretty big caveats and edge cases to those features that really can&#8217;t be ignored.</p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/@rakyll/the-sre-model-6e19376ef986" target="_blank">The SRE model</a></div>
<div class="sreweekly-description">
<p>Really, the title should be &#8220;The Google SRE Model&#8221;. This article discusses Google&#8217;s philosophy that the SRE team is optional for any given system &#8212; but a team should be doing what SRE would be doing if they&#8217;re not around.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/synqfm-ops/building-mops-modern-ops-process-transparent-status-and-rcas-72b716964bb8" target="_blank">Building mOps (Modern Ops Process): Transparent Status and RCAs</a></div>
<div class="sreweekly-description">
<p><a href="https://www.synq.fm/">SYNQ</a> pushes for transparency in incident response and commits to publishing their RCAs publicly (like <a href="https://medium.com/synqfm-ops/rca-for-live-stream-playback-issue-on-june-20th-2017-767bc1d01fcc">this one</a>). They also include a simple template for RCAs at the end of the article.</p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="http://status.aws.amazon.com/">AWS</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">us-east-1 had another one-AZ network outage.</li>
</ul>
</li>
<li><a href="http://www.livebitcoinnews.com/major-poloniex-outage-highlights-need-fewer-centralized-exchanges/">Poloniex (altcoin exchange)</a></li>
<li><a href="https://www.windowslatest.com/2017/08/03/skype-cannot-send-receive-messages/">Skype</a></li>
<li><a href="http://www.computerweekly.com/news/450423794/British-Airways-online-check-in-systems-hit-by-another-IT-failure">British Airways</a></li>
<li><a href="http://appsforpcdaily.com/2017/08/much-of-atlantic-canada-hit-by-major-cellphone-internet/">Canada</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">A large portion of Canada had a major mobile phone and internet outage due to a fiber cut.</li>
</ul>
</li>
<li><a href="https://status.heroku.com/incidents">Heroku</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Heroku has had a string of major outages, marked as red on their <a href="https://status.heroku.com/">status page</a>. Apologies for not linking to them individually and as they&#8217;ve happened, but here&#8217;s a link to their historical list. No public statement has been posted yet.
<p><small><em>Full disclosure: Heroku is my employer.</em></small></li>
</ul>
</li>
</ul>
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