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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-488/">SRE Weekly Issue #488</a></h1>
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<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-488/">August 3, 2025</a>
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<div class="sreweekly-title"><a href="https://youtube.com/watch?v=zRM2AnwNY20" target="_blank" rel="noopener">The Wild Story of the Taum Sauk Dam Failure </a></div>
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<p>A story of the failure of a pumped energy storage facility, involving all of our favorite features like complex contributing factors, work-as-done vs work-as-designed, and early warning signs only obvious in hindsight. As a bonus, no one was killed.</p>
<p>  <small>Practical Engineering</small></p>
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<div class="sreweekly-title"><a href="https://blog.nebula.tv/jet-lag-the-traffic/" target="_blank" rel="noopener">Jet Lag: The Traffic</a></div>
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<p><a href="https://nebula.tv/">Nebula</a>&#8216;s streaming service has a surprisingly write-heavy workflow owing to storing bookmarks of the latest point a given user has watched in a video. That makes scaling an interesting challenge.</p>
<p>&nbsp;&nbsp;<small> Sam Rose &mdash; Nebula</small></p>
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<div class="sreweekly-title"><a href="https://medium.com/pinterest-engineering/debugging-the-one-in-a-million-failure-migrating-pinterests-search-infrastructure-to-kubernetes-bef9af9dabf4" target="_blank" rel="noopener">Debugging the One-in-a-Million Failure: Migrating Pinterest’s Search Infrastructure to Kubernetes</a></div>
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<p>I love the debugging technique they used: kill processes one at a time until performance improves.</p>
<p>&nbsp;&nbsp;<small>Samson Hu, Shashank Tavildar, Eric Kalkanger, and Hunter Gatewood &mdash; Pinterest</small></p>
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<div class="sreweekly-title"><a href="https://rootly.com/blog/when-process-becomes-latency-optimizing-incident-response-cadence" target="_blank" rel="noopener">When Process Becomes Latency: Optimizing Incident Response Cadence</a></div>
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<p>This article is about finding the balance between having enough process to ensure incident response goes smoothly, and having so much process that incident responders are unable to adapt to unexpected situations.</p>
<p>&nbsp;&nbsp;<small>Brandon Chalk &mdash; Rootly</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://uptimelabs.io/what-experts-see-that-the-rest-of-us-miss-during-incidents/" target="_blank" rel="noopener">What Experts See That the Rest of Us Miss During Incidents</a></div>
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<p>This article presents two case studies of dialog during incidents along with analysis of each. How does your own analysis compare?</p>
<p>&nbsp;&nbsp;<small>Hamed Silatani &mdash; Uptime Labs</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://utcc.utoronto.ca/~cks/space/blog/sysadmin/MachineRoomTempTwoSortsOfAlerts" target="_blank" rel="noopener"> Chris&#8217;s Wiki :: blog/sysadmin/MachineRoomTempTwoSortsOfAlerts </a></div>
<div class="sreweekly-description">
<p>They realized that a single alert can&#8217;t catch both a sudden AC failure <em>and</em> an AC that becomes slowly but steadily overwhelmed.</p>
<p>&nbsp;&nbsp;<small>Chris Siebenmann</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2025/07/21/cloudflare-and-the-infinite-sadness-of-migrations/" target="_blank" rel="noopener">Cloudflare and the infinite sadness of migrations</a></div>
<div class="sreweekly-description">
<p>Thoughts on migrations as a significant source of reliability risk.</p>
<blockquote>
<p>[&#8230;] engineering organizations at tech companies need to make migrations a part of their core competency, rather than seeing them as one-off chores.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Lorin Hochstein</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://status.cloud.google.com/incidents/8cY8jdUpEGGbsSMSQk7J" target="_blank" rel="noopener">Google Cloud Platform incident report: July 18, 2025</a></div>
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<blockquote>
<p>An incorrect physical disconnection was made to the active network switch serving our control plane, rather than the redundant unit scheduled for removal.</p>
</blockquote>
<p>This reminds me of wrong-side surgery incidents and aircraft pilots shutting off the good engine when one fails.</p>
<p>&nbsp;&nbsp;<small>Google</small></p>
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