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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-202/">SRE Weekly Issue #202</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-202/">January 12, 2020</a>
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<a href="https://sreweekly.com/sre-weekly-issue-202/" title="Permalink to SRE Weekly Issue #202" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, VictorOps:</h2>
<p>If moving from a SysAdmin role into a DevOps-centric role is part of your 2020 resolution then you can&#8217;t miss this walkthrough for evolving your skillset:</p>
<p><a href="https://go.victorops.com/sreweekly-sysadmin-to-devops">https://go.victorops.com/sreweekly-sysadmin-to-devops</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://lorinhochstein.wordpress.com/2020/01/11/conveying-confusion-without-confusing-the-reader/" target="_blank">Conveying confusion without confusing the reader</a></div>
<div class="sreweekly-description">
<p>When writing about an incident, it&#8217;s important to skillfully show the reader how the participants&#8217; understanding of the situation evolved.</p>
<p><small>Lorin Hochstein</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.acolyer.org/2020/01/08/ironies-of-automation/" target="_blank">The Morning Paper: Ironies of automation</a></div>
<div class="sreweekly-description">
<p>This is a summary of Bainbridge&#8217;s seminal paper, and I really love where Adrian Colyer goes with it.</p>
<blockquote><p>One example I found myself thinking about while reading through the paper does have a human precedence though: self-driving cars.</p></blockquote>
<p><small>Adrian Colyer — The Morning Paper (summary)</small></p>
<p><small>Bainbridge — <em>Automatica</em> (original paper)</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/@rbranson/sharing-sqlite-databases-across-containers-is-surprisingly-brilliant-bacb8d753054" target="_blank">Sharing SQLite databases across containers is surprisingly brilliant</a></div>
<div class="sreweekly-description">
<p>I have to admit, it <em>is</em> brilliant. Why add the risk (and latency) of a centralized configuration repository service when a local DB on each host will do?</p>
<p><small>Rick Branson — Segment</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.infoq.com/presentations/microservices-failure-modes" target="_blank">Managing Failure Modes in Microservice Architectures </a></div>
<div class="sreweekly-description">
<p>This one covers a lot. My favorite parts:</p>
<ul>
<li><em>Permissive failure</em> — if Netflix&#8217;s subscriber information service is down they just show videos for free, favoring reliability over correctness.</li>
<li><em>Human attention span</em> — if it takes 10 minutes to see if your changes broke production, you&#8217;re likely to wander off and work on something else.</li>
</ul>
<p><small>Adrian Cockcroft</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://sdarchitect.blog/2020/01/08/understanding-observability/" target="_blank">Understanding Observability</a></div>
<div class="sreweekly-description">
<p>The author guides you through the moment they began to truly understand what observability is all about. Worth reading even if you&#8217;re already quite familiar with the concept.</p>
<p><small>Sanjeev Sharma</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blogs.dropbox.com/tech/2020/01/intelligent-dns-based-load-balancing-at-dropbox/" target="_blank">Intelligent DNS based load balancing at Dropbox</a></div>
<div class="sreweekly-description">
<blockquote><p>This article describes our work with NS1 to optimize our intelligent DNS-based global load balancing for corner cases that we uncovered while improving our point of presence (PoP) selection automation for our edge network.</p></blockquote>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://engineering.grab.com/preventing-app-performance-degradation-due-to-sudden-ride-demand-spikes" target="_blank">How We Prevented App Performance Degradation From Sudden Ride Demand Spikes</a></div>
<div class="sreweekly-description">
<p>Grab uses bulkheading to prevent localized demand spikes from affecting the service for customers elsewhere. The notable part is that they shed load they can&#8217;t satisfy anyway, due to a limited supply of available vehicles.</p>
<p><small>Corey Scott — Grab</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://www.dynstatus.com/incidents/p7nywmk83gl7">Dyn</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Dyn had a delay in DNS resolution in London.</li>
</ul>
</li>
<li><a href="https://status.cloud.google.com/incident/cloud-networking/20001#20001001">Google Cloud Platform (update on December 18 outage)</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<blockquote><p>On Wednesday, 18 December, 2019, a part of Google’s production network experienced a temporary reduction in capacity, due to multiple fiber cuts in optical links interconnecting Sofia, Bulgaria with other points-of-presence.</p></blockquote>
</li>
</ul>
</li>
<li><a href="https://www.bankingdive.com/news/travelex-hack-halts-currency-exchange-hsbc-barclays/570230/">Travelex</a></li>
<li><a href="https://digistatement.com/twitter-down-not-working-in-usa/">Twitter</a></li>
<li><a href="https://mybroadband.co.za/news/internet/334732-airbnb-hit-with-major-outage.html">Airbnb</a></li>
<li><a href="https://digistatement.com/thingiverse-website-down-not-working-users-are-getting-a-502-bad-gateway-error/">Thingiverse</a></li>
<li><a href="https://digistatement.com/official-update-southwest-airlines-website-down-not-working-for-many-users/">Southwest Airlines website</a></li>
<li><a href="https://inews.co.uk/news/uk/yahoo-mail-down-email-outage-reported-by-uk-users-as-others-complain-of-aol-problems-1358414">Yahoo Mail</a></li>
<li><a href="https://insidethemagic.net/2020/01/disney-plus-down-across-the-world-tm1/">Disney+</a></li>
<li><a href="https://digistatement.com/official-update-quickbooks-site-down-not-working-users-getting-quickbooks-is-offline-and-were-working-on-it-while-when-attempting-to-log-in/">QuickBooks</a></li>
<li><a href="https://www.gamenguides.com/articles/trello-down-and-outage-server-connection-website-and-apps-issues-reported-58971/">Trello</a></li>
<li><a href="https://reddit.statuspage.io/incidents/lqybk5mrnmjk">Reddit</a></li>
</ul>
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