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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-95/">SRE Weekly Issue #95</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-95/">October 29, 2017</a>
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<a href="https://sreweekly.com/sre-weekly-issue-95/" title="Permalink to SRE Weekly Issue #95" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 55%; color: #b0b0b0;">SPONSOR MESSAGE</h2>
<p>Integrate VictorOps into your SRE ops to support faster recovery and improved post-incident analysis. Get your free trial started today: <a href="http://try.victorops.com/SREWeekly/FreeTrial">http://try.victorops.com/SREWeekly/FreeTrial</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://queue.acm.org/detail.cfm?id=3155114" target="_blank">Abstracting the Geniuses Away from Failure Testing</a></div>
<div class="sreweekly-description">
<p>Chaos Engineering and Jepsen-style testing is still in its infancy. As this ACM Queue article explains, figuring out what kind of failure to test is still a manual process involving building a mental model of the system. Can we automate it?</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://about.gitlab.com/2017/10/02/scaling-the-gitlab-database/" target="_blank">Scaling the GitLab database</a></div>
<div class="sreweekly-description">
<p>GitLab shares the story of how they implemented connection pooling and load balancing with read-only replicas in PostgreSQL.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://pressbooks.org/blog/2017/10/19/moving-half-a-million-database-tables-to-aws-aurora-part-1/?utm_source=last_week_in_AWS&amp;utm_medium=newsletter&amp;__s=gcxkayouhzyr45m1hboa" target="_blank">Moving Half a Million Database Tables to AWS Aurora (Part 1)</a></div>
<div class="sreweekly-description">
<p>When you have 600,000(!!) tables in one MySQL Database, traditional migration tools like <tt>mysqldump</tt> or AWS&#8217;s Database Migration Service show cracks. The folks at PressBooks used a different tool instead: <tt>mydumper</tt>.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://read.acloud.guru/serverless-availability-zones-are-the-missing-level-of-resiliency-for-aws-f5067ab1b688?__s=gcxkayouhzyr45m1hboa" target="_blank">Serverless availability zones are the missing level of resiliency for AWS</a></div>
<div class="sreweekly-description">
<p>AWS Lambda spans multiple availability zones in each region. This author wonders whether it would it be more reliable to have separate installations of Lambda running in each availability zone, to protect against failure in Lambda itself.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://honeycomb.io/blog/2017/10/metrics-not-the-observability-droids-youre-looking-for/" target="_blank"> Metrics: not the observability droids you&#8217;re looking for </a></div>
<div class="sreweekly-description">
<p>High-cardinality fields are where all the interesting data exist, says Charity Majors of Honeycomb. But that&#8217;s exactly where most monitoring systems break down, leaving you to throw together hacks to work around their limitations.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://cloudplatform.googleblog.com/2017/10/building-good-SLOs-CRE-life-lessons.html?utm_source=monitoringweekly&amp;utm_medium=email&amp;utm_campaign=Monitoring+Weekly+-+Issue+%2523032&amp;__s=bwykwk1kcceogszq8abt&amp;m=1" target="_blank">Google Cloud Platform Blog: Building good SLOs &#8211; CRE life lessons</a></div>
<div class="sreweekly-description">
<p>Google shares some best practices for building Service Level Objectives.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.hostedgraphite.com/2017/10/25/collaboration-evaluation-why-we-pay-sre-candidates-to-interview-all-day/" target="_blank">Collaboration &gt; evaluation: Why we pay SRE candidates to interview all-day</a></div>
<div class="sreweekly-description">
<p>Hosted Graphite brings candidates in to work with them for a day and pays them for their time.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://victorops.com/blog/call-horror-story-number-three-wins-grueling-award/" target="_blank">On-Call Horror Story Number Three: This Wins the Most Grueling Award</a></div>
<div class="sreweekly-description">
<p>Grueling is right: their entire team came to the office over the weekend to work on the outage. Lesson learned:</p>
<blockquote><p>When something goes horribly wrong, don’t bring everybody in. More ideas are good to a point, but if you don’t solve it in the window of a normal human’s ability to stay awake, the value they are giving you goes down exponentially as they get tired.</p></blockquote>
<p><small><em>This article is published by my sponsor, VictorOps, but their sponsorship did not influence its inclusion in this issue.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.intercom.com/psychological-safety/" target="_blank">Engineering a culture of psychological safety &#8211; Inside Intercom</a></div>
<div class="sreweekly-description">
<p>Google&#8217;s Project Aristotle discovered that the number one predictor of successful teams is psychological safety. The anecdotes in this piece show how psychological safety is also critical in analyzing incidents.</p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="http://www.themountaineer.com/news/power-outage-coupled-with-murphy-s-law-leads-to-raw/article_f7ff31e2-b8cf-11e7-bff1-1723e32146e9.html">Power outage, coupled with Murphy&#8217;s law, leads to raw sewage spill</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">The power failed, and then the backup generator failed. Sound familiar? I&#8217;m glad datacenters don&#8217;t flood with sewage when this happens&#8230;</li>
</ul>
</li>
<li><a href="http://www.ecommercebytes.com/C/blog/blog.pl?/pl/2017/10/1509021696.html">eBay</a></li>
<li><a href="http://www.fox4news.com/news/network-outage-forces-state-fair-to-admit-tens-of-thousands-for-free">Texas State Fair</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Their ticket system went down, so they had to admit fair-goers for free.</li>
</ul>
</li>
</ul>
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