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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-265/">SRE Weekly Issue #265</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-265/">April 11, 2021</a>
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<a href="https://sreweekly.com/sre-weekly-issue-265/" title="Permalink to SRE Weekly Issue #265" 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, StackHawk:</h2>
<p>Join StackHawk and WhiteSource tomorrow morning to learn about automated security testing in the DevOps pipeline. With automated dynamic testing and software composition analysis, you can be sure you&#8217;re shipping secure APIs and applications. Grab your spot:<br />
<a href="http://sthwk.com/stackhawk-whitesource">http://sthwk.com/stackhawk-whitesource</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.linkedin.com/pulse/insights-product-sre-team-linkedin-zaina-afoulki/" target="_blank">Insights into a Product SRE team at LinkedIn</a></div>
<div class="sreweekly-description">
<p>Here&#8217;s a great look into how LinkedIn&#8217;s embedded SREs work.</p>
<blockquote><p>[&#8230;] the mission for Product SRE is to “engineer and drive product reliability by influencing architecture, providing tools, and enhancing observability.”</p></blockquote>
<p><small>Zaina Afoulki and Lakshmi Namboori — LinkedIn</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.nslookup.io/blog/dns-propagation-does-not-exist/" target="_blank">DNS propagation does not exist</a></div>
<div class="sreweekly-description">
<p>It&#8217;s all just other people&#8217;s caches.</p>
<p><small>Ruurtjan Pul</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://shoreline.io/advice-for-someone-moving-from-sre-to-backend-engineering/" target="_blank">Advice for someone moving from SRE to backend engineering</a></div>
<div class="sreweekly-description">
<blockquote><p>Recently there was a Reddit post asking for advice about moving from Site Reliability Engineering to Backend Eng. I started writing a response to it, the response got long, and so I turned it into a blog post.</p></blockquote>
<p><small>Charles Cary — Shoreline</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://flyingbarron.medium.com/the-mightiest-monolith-7aa67ab8d84f" target="_blank">The Mightiest Monolith</a></div>
<div class="sreweekly-description">
<p>This is the first in a series about lessons SREs can learn from the space shuttle program. The author likens earlier spacecraft to microservices and the Shuttle to a monolith.</p>
<p><small>Robert Barron</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.ems1.com/safety/articles/the-5-characteristics-of-high-reliability-organizations-sn0WB7bjD4WTN6cq/" target="_blank">The 5 characteristics of high reliability organizations</a></div>
<div class="sreweekly-description">
<p>This article is ostensibly about Emergency Medical Services (EMS), but as is so often the case, it&#8217;s directly applicable to SRE. The 5 characteristics are enlightening, and so is the fictitious anecdote about an EMT rattled from a previous incident.</p>
<p><small>Ems1</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://github.blog/2021-04-05-how-we-scaled-github-api-sharded-replicated-rate-limiter-redis/" target="_blank">How we scaled the GitHub API with a sharded, replicated rate limiter in Redis</a></div>
<div class="sreweekly-description">
<p>Simple solution meets reality. I like how we get to see what they did when things didn&#8217;t quite work out as they were hoping.</p>
<p><small>Robert Mosolgo — GitHub</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://github.blog/2021-04-07-github-availability-report-march-2021/" target="_blank">GitHub Availability Report: March 2021</a></div>
<div class="sreweekly-description">
<p>They did the work to convert a database column to a 64-bit integer before it was too late. Unfortunately, one of their library dependencies didn&#8217;t use 64-bit integers.</p>
<p><small>Keith Ballinger — GitHub</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://tech.scribd.com/blog/2020/sidekiq-incident-learnings.html" target="_blank">Learning from incidents: getting Sidekiq ready to serve a billion jobs</a></div>
<div class="sreweekly-description">
<blockquote><p>In this post, I’ll walk you through one of our first ever Sidekiq incidents and how we improved our Sidekiq implementation as a result of this incident.</p></blockquote>
<p><small>Nakul Pathak — Scribd</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.io/pages/incident/55957a99e800baa4470002da/606a943d0188ca052e1abf9a">Let&#8217;s Encrypt</a></li>
<li><a href="https://www.thesun.co.uk/news/14552047/uber-app-down-users-something-went-wrong/">Uber</a></li>
<li><a href="https://simpleflying.com/google-software-airline-booking-sites-downtime/">Multiple Airlines&#8217; Online Booking Sites</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">An error in Google&#8217;s flight information service caused problems at multiple sites that consume it.</li>
</ul>
</li>
<li><a href="https://www.dailymail.co.uk/sciencetech/article-9441371/Tinder-Dating-app-crashes-frustrated-singletons-world.html">Tinder</a></li>
<li><a href="https://sputniknews.com/world/202104081082573857-bbc-website-goes-down-with-fatal-error/">BBC Website</a></li>
<li><a href="https://www.rt.com/news/520528-facebook-instagram-down-error/">Facebook, Instagram, and WhatsApp</a></li>
<li><a href="https://status.stellar.org/incidents/7h0czw6mnjzs">Stellar.org (cryptocurrency)</a></li>
<li><a href="https://support.wazirx.com/hc/en-us/articles/900005490846-April-4-2021-Downtime-Analysis-Report">WazirX (cryptocurrency exchange)</a></li>
<li><a href="https://status.azure.com/en-us/status/history/#:~:text=GVY5-TZZ">Microsoft Azure and other services</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<blockquote><p>Azure DNS servers experienced an anomalous surge in DNS queries from across the globe targeting a set of domains hosted on Azure.</p></blockquote>
</li>
</ul>
</li>
</ul>
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