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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-273/">SRE Weekly Issue #273</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-273/">June 6, 2021</a>
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<a href="https://sreweekly.com/sre-weekly-issue-273/" title="Permalink to SRE Weekly Issue #273" 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, StackHawk:</h2>
<p>StackHawk is helping One Medical equip developers with automated security testing and self-service remediations. See how:<br />
<a href="http://sthwk.com/onemedical">http://sthwk.com/onemedical</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://rootly.io/blog/incident-management-vs-incident-response-what-s-the-difference" target="_blank">Incident Management vs. Incident Response</a></div>
<div class="sreweekly-description">
<p>What indeed? It depends on who you ask.</p>
<p><small>Quentin Rousseau — Rootly</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://sigops.org/s/conferences/hotos/2021/papers/hotos21-s01-hochschild.pdf" target="_blank">Cores that don’t count</a></div>
<div class="sreweekly-description">
<p>This academic paper explains Google&#8217;s efforts toward identifying &#8220;mercurial&#8221; CPU coores — cores that make erroneous computations.</p>
<blockquote><p>[&#8230;] we observe on the order of a few mercurial cores per several thousand machines [&#8230;]</p></blockquote>
<p>This one blew my mind:</p>
<blockquote><p>A deterministic AES mis-computation, which was “selfinverting”: encrypting and decrypting on the same core yielded the identity function, but decryption elsewhere yielded gibberish.</p></blockquote>
<p><small>Peter H. Hochschild, Paul Turner, Jeffrey C. Mogul, Rama Govindaraju, Parthasarathy Ranganathan, David E. Culler, and Amin Vahdat — Google</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.fastly.com/blog/minimizing-ossification-risk-is-everyones-responsibility" target="_blank">Minimizing ossification risk is everyone’s responsibility </a></div>
<div class="sreweekly-description">
<p>The decisions, non-decisions, and workarounds that we implement now can have lasting effects on the Internet as a whole.</p>
<p><small>Mark Nottingham — Fastly</small></p>
<p><small><em>Full disclosure: Fastly is my employer.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.luminis.eu/blog/resilience-en/what-is-resilience-engineering-a-lightning-talk-with-background-information/" target="_blank">What is resilience engineering? A lightning talk with background information</a></div>
<div class="sreweekly-description">
<p>A great intro to the topic of resilience engineering. Hint: resilience <code>!=</code> high availability.</p>
<p><small>Piet van Dongen — Luminis Arnhem</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2021/05/30/dealing-with-new-kinds-of-trouble/" target="_blank">Dealing with new kinds of trouble</a></div>
<div class="sreweekly-description">
<p>When you include people in your definition of &#8220;the system&#8221;, something that looked like a system failure where humans had to &#8220;step in&#8221; is actually a success in which the system adapted.</p>
<p><small>Lorin Hochstein</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://rachelbythebay.com/w/2021/06/01/count/" target="_blank">Please don&#8217;t count outages (or SEVs, or whatever)</a></div>
<div class="sreweekly-description">
<p>I find the way this author presented this argument especially convincing. My favorite part is the real-world story toward the end.</p>
<p><small>Rachel by the Bay</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://engineering.fb.com/2021/06/02/data-center-engineering/how-facebook-deals-with-pcie-faults-to-keep-our-data-centers-running-reliably/" target="_blank">How Facebook deals with PCIe faults to keep our data centers running reliably</a></div>
<div class="sreweekly-description">
<p>Facebook presents their method for finding and dealing with PCIe errors in their infrastructure.</p>
<p><small>Ashwin Poojary, Bill Holland, Makan Diarra, and Ray Park — Facebook</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://github.blog/2021-06-02-github-availability-report-may-2021/" target="_blank">GitHub Availability Report: May 2021</a></div>
<div class="sreweekly-description">
<p>Overflow of a 32-bit integer primary key caused a security issue.</p>
<p><small>Scott Sanders — GitHub</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://developers.soundcloud.com/blog/building-a-healthy-on-call-culture" target="_blank">Building a Healthy On-Call Culture</a></div>
<div class="sreweekly-description">
<p>This caught my eye. I&#8217;ve seldom been in an on-call rotation with shifts that were not a week or two at a time.</p>
<blockquote><p>The optimal frequency for being on call is about three days a month.</p></blockquote>
<p>There&#8217;s also a good discussion of paying for on-call shifts, which, in my experience, goes a long way toward making on-call more palatable.</p>
<p><small>Christine Patton — SoundCloud</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://www.dailymail.co.uk/tvshowbiz/article-9635911/HBO-Max-outage-draws-ire-Twitter-users-eager-season-finale-Kate-Winslets-Mare-Easttown.html">HBO Max</a></li>
<li><a href="https://www.pymnts.com/news/payment-methods/2021/apple-card-outage-disrupting-purchases/">Apple Card</a></li>
<li><a href="https://piunikaweb.com/2021/06/03/sling-tv-down-error-code-12-47-issue-gets-officially-acknowledged/">Sling TV</a></li>
<li><a href="https://www.thehindubusinessline.com/info-tech/google-meet-services-hit-by-temporary-outage-in-india-issue-resolved-later/article34739597.ece">Google Meet</a></li>
<li><a href="https://www.githubstatus.com/incidents/76nv9h8pmkv4">GitHub</a></li>
<li><a href="https://discord.statuspage.io/incidents/sdqlyt2zcwdt">Discord</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Discord had several outages this week.</li>
</ul>
</li>
</ul>
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