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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-486/">SRE Weekly Issue #486</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-486/">July 20, 2025</a>
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<p><a class="email_only" href="https://sreweekly.com/sre-weekly-issue-486/">View on sreweekly.com</a></p>
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<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, <a href="https://spacelift.io/">Spacelift</a>:</h2>
<p><strong>IaC Experts! IaCConf Call for Presenters &#8211; August 27, 2025</strong></p>
<p>The upcoming IaCConf Spotlight dives into the security and governance challenges of managing infrastructure as code at scale. From embedding security in your pipelines to navigating the realities of open source risk, this event brings together practitioners who are taking a security-minded approach to how they implement IaC in their organization.</p>
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<div class="sreweekly-title"><a href="https://youtube.com/watch?v=N9_Nvkjo1P0&#038;feature=shared" target="_blank" rel="noopener">Slight Reliability Podcast Episode 100: Learning with John Allspaw</a></div>
<div class="sreweekly-description">
<p>For his hundredth(!) episode of Slight Reliability, Stephen Townsend has an awesome chat with John Allspaw. I especially loved the part where John pointed out that different people will get different &#8220;Aha Moments&#8221; from the same incident.</p>
<p>&nbsp;&nbsp;<small>Stephen Townshend</small></p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://launchdarkly.com/blog/rto-vs-rpo/" target="_blank" rel="noopener">RTO vs RPO: Key Differences for Modern Disaster Recovery</a></div>
<div class="sreweekly-description">
<p>This article delves deep into the nuances of Recovery Time Objective and Recovery Point Objective and how to manage both without spending too much. There&#8217;s a strong theme of using feature flags as you might expect from this company, but this article goes beyond being just a one-dimensional product pitch.</p>
<p>&nbsp;&nbsp;<small>Jesse Sumrak &mdash; LaunchDarkly</small></p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.tines.com/blog/chatops-fatigue-how-to-create-alerts-that-matter" target="_blank" rel="noopener">ChatOps fatigue: how to create alerts that matter</a></div>
<div class="sreweekly-description">
<p>A discussion of the qualities of a good alert and how to audit and improve your alerting.</p>
<p>&nbsp;&nbsp;<small>Hannah Roy &mdash; Tines</small></p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2025/07/09/component-defects-rca-vs-re/" target="_blank" rel="noopener">Component defects: RCA vs RE</a></div>
<div class="sreweekly-description">
<p>This one contrasts two views on latent defects in our systems, from Root Cause Analysis and Resilience Engineering perspectives. The RE perspective looks scary, but it&#8217;s much more nuanced than that.</p>
<p>&nbsp;&nbsp;<small>Lorin Hochstein</small></p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/fare-cache-race-conditions-troubleshooting" target="_blank" rel="noopener">When Caches Collide: Solving Race Conditions in Fare Updates</a></div>
<div class="sreweekly-description">
<p><a href="https://www.grab.com/sg/">Grab</a> has seen multiple scenarios in which concurrent cache writes result in inconsistent fares. This article explains their strategies for detecting and dealing with them.</p>
<p>&nbsp;&nbsp;<small> Ravi Teja Thutari &mdash; DZone</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://budibase.com/blog/updates/2024/2024-01-09-incident/" target="_blank" rel="noopener">Budibase Cloud January 9th Incident</a></div>
<div class="sreweekly-description">
<p>Adding a node to a CouchDB cluster went poorly, resulting in lost data in this incident from 2024.</p>
<blockquote>
<p>The mistake we made in our automated process for adding nodes was to add the new node to our load balancer before it had fully synchronised.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Sam Rose &mdash; Budibase</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://monzo.com/blog/2019/09/08/why-monzo-wasnt-working-on-july-29th" target="_blank" rel="noopener">We had issues with Monzo on 29th July. Here&#8217;s what happened, and what we did to fix it.</a></div>
<div class="sreweekly-description">
<p>The parallels between this incident and the Budibase one above are striking! I swear it&#8217;s a coincidence that I came across both of these old incident reports in the same week.</p>
<p>  <small>Chris Evans and Suhail Patel — Monzo</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.cloudflare.com/cloudflare-1-1-1-1-incident-on-july-14-2025/" target="_blank" rel="noopener">Cloudflare 1.1.1.1 Incident on July 14, 2025</a></div>
<div class="sreweekly-description">
<p>Another tricky failure mode for Cloudflare&#8217;s massive DNS resolver service. They share all the details in this post with their usual flare (sorry, I couldn&#8217;t resist).</p>
<p>&nbsp;&nbsp;<small>Ash Pallarito and Joe Abley &mdash; Cloudflare</small></p>
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