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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-365/">SRE Weekly Issue #365</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-365/">March 26, 2023</a>
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<h2 style="text-align: center;font-size: 80%;color: #909090;">A message from our sponsor, <a href="https://rootly.com/demo/?utm_source=sreweekly">Rootly</a>:</h2>
<p>Manage incidents directly from Slack with Rootly&nbsp;🚒.</p>
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<h2 class="wp-block-heading">Articles</h2>
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<div class="sreweekly-title"><a href="https://doordash.engineering/2023/02/22/how-doordash-designed-a-successful-write-heavy-scalable-and-reliable-inventory-platform/" target="_blank" rel="noopener">How DoorDash Designed a Successful Write-Heavy Scalable and Reliable Inventory Platform</a></div>
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<p>They take us from the requirements analysis all the way through implementation of a high-throughput data store based on CockroachDB.</p>
<p>&nbsp;&nbsp;<small>Chuanpin Zhu and Debalin Das — DoorDash</small></p>
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<div class="sreweekly-title"><a href="https://www.reddit.com/r/RedditEng/comments/11xx5o0/you_broke_reddit_the_piday_outage/" target="_blank" rel="noopener">You Broke Reddit: The Pi-Day Outage</a></div>
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<p>On March 14th, Reddit engineers upgraded a Kubernetes cluster from 1.23 to 1.24, and all hell broke loose. I admire their precision in being down for 100π minutes.</p>
<p>&nbsp;&nbsp;<small>Jayme Howard — Reddit</small></p>
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<div class="sreweekly-title"><a href="https://medium.com/govtech-edu/how-we-keep-our-government-apps-running-with-high-reliability-a-peek-at-our-incident-management-fe1386d0fa43" target="_blank" rel="noopener">How We Keep Our Government Apps Running With High Reliability: A Peek at Our Incident Management Strategy</a></div>
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<p>With a huge user-base of students and teachers, these folks upped their incident response game, and they share how.</p>
<p>  <small>Nadinastiti and Estu Fardani — GovTech Edu</small></p>
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<div class="sreweekly-title"><a href="https://openai.com/blog/march-20-chatgpt-outage#technical-details" target="_blank" rel="noopener">March 20 ChatGPT outage: Here’s what happened</a></div>
<div class="sreweekly-description">
<p>A lurking bug in redis-py allowed users to see one another&#8217;s data, and OpenAI took ChatGPT down to limit the damage.</p>
<p>&nbsp;&nbsp;<small>OpenAI</small></p>
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<div class="sreweekly-title"><a href="https://blog.cloudflare.com/the-quantum-state-of-a-tcp-port/" target="_blank" rel="noopener">The quantum state of a TCP port</a></div>
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<p>In Linux, source port allocation can be complex. This article shows why with a ton of code and tracing examples.</p>
<p>&nbsp;&nbsp;<small>Jakub Sitnicki — Cloudflare</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://brooker.co.za/blog/2023/03/23/economics.html" target="_blank" rel="noopener">Surprising Scalability of Multitenancy</a></div>
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<p>The gap between &#8220;paying for peak&#8221; and &#8220;earning on average&#8221; is critical to understand how the economics of large-scale cloud systems differ from traditional single-tenant systems.</p>
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<p>&nbsp;&nbsp;<small>Marc Brooker</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://status.heroku.com/incidents/2524" target="_blank" rel="noopener">Heroku Incident #2524 Follow-up</a></div>
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<p>A configuration error was masked because the app automatically fell back to the original configuration. The problem only surfaced when the service was redeployed.</p>
<p>&nbsp;&nbsp;<small>Heroku</small></p>
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