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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-470/">SRE Weekly Issue #470</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-470/">March 30, 2025</a>
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<a class="email_only" href="https://sreweekly.com/sre-weekly-issue-470/">View on sreweekly.com</a>
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<h2 style="text-align: center;font-size: 80%;color: #909090;">A message from our sponsor, <a href="https://incident.io/">incident.io</a>:</h2>
<p>Intercom migrated hundreds of engineers from PagerDuty and Atlassian Status Page to incident.io in just weeks, improving resolution times, simplifying incident management, and delivering a better customer support experience. Watch the video case study. </p>
<p><a href="https://go.incident.io/customers/intercom">https://go.incident.io/customers/intercom</a></p>
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<div class="sreweekly-title"><a href="https://medium.com/@Spamaps/the-sociotechnical-reality-engineer-8a51e31c841b" target="_blank" rel="noopener">The Sociotechnical Reality Engineer</a></div>
<div class="sreweekly-description"><p>An SRE thinks about the meaning of &#8220;sociotechnical&#8221;:</p>
<blockquote>
<p>From an SRE perspective, it means that when we’re looking at a piece of software, we can’t just factor out the human decisions that happen both in its operation and usage, but also in its development.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Clint Byrum</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://engblog.nextdoor.com/scaling-nextdoors-datastores-part-2-513922e4b4b1" target="_blank" rel="noopener">Scaling Nextdoor’s Datastores: Part 2</a></div>
<div class="sreweekly-description"><p>This one is about the difficulties they had with database read replicas that led to developers mostly just sending reads to the primary. They came up with a pretty neat solution to automatically send read queries to the replica when possible.</p>
<p>In case you missed it, <a href="https://engblog.nextdoor.com/scaling-nextdoors-datastores-part-1-234d0cf67665">here&#8217;s part 1</a>.</p>
<p>&nbsp;&nbsp;<small>Tushar Singla &mdash; Nextdoor</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://uptimelabs.io/beyond-5-whys-a-better-way-to-learn-from-incidents/" target="_blank" rel="noopener">Beyond “5 Whys”: A Better Way to Learn from Incidents</a></div>
<div class="sreweekly-description"><p>This well-thought-out article starts with a solid critique of Five Whys, illustrated with example scenarios. The author then explains why they prefer open-ended questions.</p>
<p>&nbsp;&nbsp;<small>Hamed Silatani</small></p></div></div>
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<div class="sreweekly-title"><a href="https://thenewstack.io/when-do-retry-backoff-and-jitter-work/" target="_blank" rel="noopener">When Do Retry, Backoff, and Jitter Work?</a></div>
<div class="sreweekly-description"><p>Spurred by a conversation with engineers, the author of this article explains what retries, backoff, and jitter can fix, and more importantly, when they won&#8217;t help.</p>
<p>&nbsp;&nbsp;<small>Tejas Ghadge &mdash; The New Stack</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.cloudflare.com/cloudflare-incident-march-21-2025/" target="_blank" rel="noopener">Cloudflare incident on March 21, 2025</a></div>
<div class="sreweekly-description"><p>This is a juicy one, involving a routine credential roll gone bad, resulting in an outage in Cloudflare&#8217;s R2 service.</p>
<p>&nbsp;&nbsp;<small>Phillip Jones &mdash; Cloudflare</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://planetscale.com/blog/anatomy-of-a-throttler-part-1" target="_blank" rel="noopener">Anatomy of a Throttler, part 1</a></div>
<div class="sreweekly-description"><blockquote>
<p>In this series of posts, we illustrate design considerations for a database system throttler, whose purpose is to keep the database system healthy overall. We discuss choice of metrics, granularity, behavior, impact, prioritization, and other topics.</p>
</blockquote>
<p>Part 2 is <a href="https://planetscale.com/blog/anatomy-of-a-throttler-part-2">here</a> and part 3 is <a href="https://planetscale.com/blog/anatomy-of-a-throttler-part-3">here</a>.</p>
<p>&nbsp;&nbsp;<small>Shlomi Noach &mdash; Planetscale</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.thecoder.cafe/p/lurking-variables" target="_blank" rel="noopener">Lurking Variables: How Hidden Factors Can Mislead Your Analysis</a></div>
<div class="sreweekly-description"><p>I hadn&#8217;t heard the term &#8220;lurking variable&#8221; before, but I definitely know the concept. This article is a must-read for anyone troubleshooting tricky problems in production, and especially for earlier-career folks developing their skills.</p>
<p>&nbsp;&nbsp;<small>Teiva Harsanyi &mdash; The Coder Cafe</small></p></div></div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/avoid-cross-shard-data-movement" target="_blank" rel="noopener">Avoid Cross-Shard Data Movement in Distributed Databases</a></div>
<div class="sreweekly-description"><p>This article gives 4 strategies to better handle situations when database queries need to join across data residing in separate shards.</p>
<p>&nbsp;&nbsp;<small> Baskar Sikkayan &mdash; DZone</small></p></div></div>
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