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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-295/">SRE Weekly Issue #295</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-295/">November 7, 2021</a>
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<a href="https://sreweekly.com/sre-weekly-issue-295/" title="Permalink to SRE Weekly Issue #295" 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, <a href="https://rootly.com/?utm_source=sreweekly">Rootly</a>:</h2>
<p>Manage incidents directly from Slack with Rootly 🚒. Automate manual admin tasks like creating incident channel, Jira and Zoom, paging the right team, postmortem timeline, setting up reminders, and more. Book a demo:<br />
<a href="https://rootly.com/?utm_source=sreweekly">https://rootly.com/?utm_source=sreweekly</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.verica.io/blog/mttr-is-a-misleading-metric-now-what/" target="_blank">MTTR is a Misleading Metric—Now What?</a></div>
<div class="sreweekly-description">
<p>I love this crystal clear argument based on statistics and research. MTTR as a metric is simply meaningless.</p>
<p><small>Courtney Nash — Verica</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://incident.io/blog/five-steps-to-better-customer-comms" target="_blank">Five steps to better customer communication</a></div>
<div class="sreweekly-description">
<p>Their steps for better communication during an outage:</p>
<blockquote>
<ul>
<li>Provide context to minimise speculation</li>
<li>Explain what you’re doing to demonstrate you&#8217;re &#8216;on it&#8217;</li>
<li>Set some expectations for when things will return to normal</li>
<li>Tell people what they should do0</li>
<li>Let folks know when you’ll be updating them next</li>
</ul>
</blockquote>
<p><small>Chris Evans — incident.io</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://status.heroku.com/incidents/2365" target="_blank">Heroku Incident 2365 Follow-Up</a></div>
<div class="sreweekly-description">
<p>Despite checking in advance to be sure their systems would support the new Let&#8217;s Encrypt certificate chain, they ran into trouble.</p>
<blockquote><p>[&#8230;] we discovered that several HTTP client libraries our systems use were using their own vendored root certificates.</p></blockquote>
<p><small>Heroku</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://cloudpundit.com/2021/10/14/multicloud-failover-is-almost-always-a-terrible-idea/" target="_blank">Multicloud failover is almost always a terrible idea</a></div>
<div class="sreweekly-description">
<p>This is the best case I&#8217;ve seen yet against multi-cloud infrastructure. I really like the airline analogy.</p>
<p><small>Lydia Leong</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.roblox.com/2021/10/update-recent-service-outage/" target="_blank">An Update on Our Outage &#8211; Roblox</a></div>
<div class="sreweekly-description">
<p>Roblox had a major, several-day outage starting on October 28. I don&#8217;t usually include game outages in the Outages section since they&#8217;re so common and there&#8217;s not usually much information to learn from, I sure do like a good post-incident report. Thanks, folks!</p>
<p><small>David Baszucki — Roblox</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://vorner.github.io/2020/11/06/40-ms-bug.html" target="_blank">40 Ms Bug</a></div>
<div class="sreweekly-description">
<p>When you&#8217;re sending small TCP packets, two optimizations can conspire to introduce an artificial 40 millisecond (not megasecond&#8230;) delay.</p>
<p><small>Vorner</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.google.com/appsstatus/dashboard/incidents/k71P8nHp32hgcMSsC3mR" target="_blank">Google Incident report &#8212; Meet</a></div>
<div class="sreweekly-description">
<p>_Here&#8217;s Google&#8217;s follow-up report for their October 25-26 Meet outage.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.reddit.com/r/sre/comments/qkj8xd/how_to_deal_with_retries_in_slis/" target="_blank">/r/sre &#8212; How to deal with retries in SLIs</a></div>
<div class="sreweekly-description">
<p>Should you count failed requests toward your SLI if the client retries and succeeds? A good argument can be made on either side.</p>
<p><small>u/Sufficient_Tree4275 and other Reddit users</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://engineering.mercari.com/en/blog/entry/20210129-embedded-sre/" target="_blank">What the SRE team wants to achieve with the development team</a></div>
<div class="sreweekly-description">
<p>Mercari restructured its SRE team, moving toward an embedded model to adapt to their growing microservice architecture.</p>
<p><small>ShibuyaMitsuhiro — Mercari</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://podcast.thevoid.community/1793843/9471681-episode-1-honeycomb-and-the-kafka-migration" target="_blank">Episode 1: Honeycomb and the Kafka Migration &#8211; The VOID</a></div>
<div class="sreweekly-description">
<p>There&#8217;s a really great discussion in this episode about leaving slack in the system in the form of bits of capacity and inefficiency that can be drawn upon to buy time during an outage.</p>
<p><small>Courtney Nash, with guests Liz Fong-Jones and Fred Hebert — Verica</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.transposit.com/blog/why-a-reliability-mindset-must-be-adopted-beyond-sre/" target="_blank">Why a ‘Reliability Mindset’ Must Be Adopted Beyond SRE</a></div>
<div class="sreweekly-description">
<p>Here&#8217;s how non-SREs can use SRE principles to improve their systems.</p>
<p><small>Laurel Frazier — Transposit</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://7news.com.au/technology/facebook-messenger-and-instagram-down-metas-suite-of-social-media-products-facing-network-outages-c-4425965">Facebook, Messenger and Instagram</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Or Meta or whatever.</li>
</ul>
</li>
<li><a href="https://9to5google.com/2021/11/03/google-nest-outage-offline/">Google Nest</a></li>
</ul>
</div>
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