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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-222/">SRE Weekly Issue #222</a></h1>
</header>
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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-222/">June 7, 2020</a>
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<a href="https://sreweekly.com/sre-weekly-issue-222/" title="Permalink to SRE Weekly Issue #222" class="email_only">View on sreweekly.com</a>
<div class="sreweekly-sponsor-message" style="border: 1px solid #b0b0b0; padding-left: 1rem; padding-right: 1rem; width: 80%; align: center; margin: 2rem auto 2rem auto;">
<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, StackHawk:</h2>
<p>The last thing we need is more noise from more tooling. With the new Findings Management feature, you can add AppSec tests to your CI pipeline without being innundated with alerts.<br />
<a href="https://www.stackhawk.com/blog/appsec-findings-management?utm_source=SREWeekly">https://www.stackhawk.com/blog/appsec-findings-management?utm_source=SREWeekly</a></p>
</div>
<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://techbeacon.com/enterprise-it/meaningful-availability-how-many-nines-do-you-actually-need" target="_blank">Meaningful availability: How many nines do you actually need?</a></div>
<div class="sreweekly-description">
<p>This article in a nutshell:</p>
<ul>
<li><a href="https://thenewstack.io/honeycomb-ceo-charity-majors-on-sharing-customer-pain/">Nines don&#8217;t matter if users aren&#8217;t happy</a> (h/t Charity Majors)</li>
<li>Chaos engineering</li>
</ul>
<p><small>Kolton Andrus — Gremlin</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://ayende.com/blog/191073-A/byzantine-and-non-byzantine-distributed-systems?Key=26f97b3c-f827-4408-832f-6ae183ec2698" target="_blank"> Byzantine and non-Byzantine distributed systems</a></div>
<div class="sreweekly-description">
<p>I hadn&#8217;t heard of this distinction before. If you haven&#8217;t either, click through to find out more.</p>
<p><small>Ayende Rahien — RavenDB</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://cloud.google.com/blog/products/management-tools/meeting-reliability-challenges-with-sre-principles/" target="_blank">Using SRE to meet reliability challenges</a></div>
<div class="sreweekly-description">
<blockquote><p>In our experience, the three big sources of production stress are:</p>
<ul>
<li>Toil</li>
<li>Bad monitoring</li>
<li>Immature incident handling procedures</li>
</ul>
</blockquote>
<p><small>Cheryl Kang — Google</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.propublica.org/article/marines-hornet-squadron-242-crash-pacific-resilard" target="_blank">Faulty Equipment, Lapsed Training, Repeated Warnings: How a Preventable Disaster Killed Six Marines</a></div>
<div class="sreweekly-description">
<p>ProPublica picks apart the incident in exhaustive detail, showing how multiple problems interwoven in the organization contributed to this tragedy.</p>
<p><small> Robert Faturechi, Megan Rose and T. Christian Miller — ProPublica</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2020/05/25/sre-cse-and-the-safety-boundary/" target="_blank">SRE, CSE, and the safety boundary</a></div>
<div class="sreweekly-description">
<p>There&#8217;s a great review of Rasmussen&#8217;s safety boundary model, which I wasn&#8217;t previously familiar with. A system moves between three boundaries:</p>
<ul>
<li>the boundary to economic failure</li>
<li>the boundary of unacceptable work load</li>
<li>the boundary of functionally acceptable performance</li>
</ul>
<p><small>Lorin Hochstein</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://billduncan.org/the-tail-at-scale-revisited/" target="_blank">The Tail at Scale Revisited</a></div>
<div class="sreweekly-description">
<p>This one includes a really nifty graph showing how reliable your N backend microservices need to be in order to hit a given reliability target R.</p>
<p><small>Bill Duncan</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.firehydrant.io/blog/oncall-and-covid-19-survey-results/" target="_blank">Oncall and COVID-19 Survey Results</a></div>
<div class="sreweekly-description">
<p>Here are the results of the survey I linked here a couple weeks ago. There are some interesting and surprising results, well worth a read.</p>
<p><small>Rich Burroughs — FireHydrant</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://nakedsecurity.sophos.com/2020/06/02/the-mystery-of-the-expiring-sectigo-web-certificate/" target="_blank">The mystery of the expiring Sectigo web certificate</a></div>
<div class="sreweekly-description">
<p>A commonly-used CA&#8217;s Root certificate expired, causing some havoc. Even though Sectigo did everything right, some software didn&#8217;t handle the transition to the new root well.</p>
<p><small>Paul Ducklin — Naked Security</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.pagerduty.com/incidents/yw8s50fbm6s2">PagerDuty</a></li>
<li><a href="https://blog.coinbase.com/incident-post-mortem-june-1-2020-1cff2e51fa64">Coinbase</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Coinbase had an outage on June 1. Click for their post-incident analysis.</li>
</ul>
</li>
<li><a href="https://androidgram.com/robinhood-down-both-app-website-are-having-server-issues-users-unable-to-transfer-funds/">Robinhood</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Robinhood&#8217;s <a href="https://status.robinhood.com/">status page</a> doesn&#8217;t show history, so I can&#8217;t verify this one.</li>
</ul>
</li>
<li><a href="https://telanganatoday.com/apple-fixes-outage-preventing-users-from-accessing-icloud-storage">iCloud</a></li>
<li><a href="https://www.thesun.co.uk/tech/10729859/ebay-down-not-working-offline-outage-2020/">Ebay</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Ebay&#8217;s <a href="https://www.ebay.com/sts">status page</a> also doesn&#8217;t show history, so I can&#8217;t verify this one either.</li>
</ul>
</li>
<li><a href="https://www.thescottishsun.co.uk/money/5654832/lloyds-bank-halifax-app-website-down-customers-locked/">Lloyds and Halifax (bank)</a></li>
<li><a href="https://www.theregister.co.uk/2020/05/27/adobe_cloud_outage/">Adobe Cloud</a></li>
<li><a href="https://status.squarespace.com/incidents/1wg7g5tc5jy2">Squarespace</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Their followup post discusses the large-scale DDoS that contributed to the outage.</li>
</ul>
</li>
<li><a href="https://status.hostedgraphite.com/incidents/f545qq2nck4x">HostedGraphite</a></li>
<li><a href="https://twitter.com/telegram/status/1269379445674127362">Telegram</a></li>
</ul>
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