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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-19/">SRE Weekly Issue #19</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-19/">April 17, 2016</a>
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<a href="https://sreweekly.com/sre-weekly-issue-19/" title="Permalink to SRE Weekly Issue #19" class="email_only">View on sreweekly.com</a>
<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://rachelbythebay.com/w/2016/02/21/malloc/" target="_blank">A mystery with memory leaks and a magic number</a></div>
<div class="sreweekly-description">I just love this story. I heard Rachel Kroll tell it during her keynote at SREcon, and here it is in article form. It&#8217;s an incredibly deep dive through a gnarly debugging session, and I can&#8217;t recommend enough that you read it. NSFL (not safe for the library), because it&#8217;s pretty darned hilarious.</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.nylas.com/blog/growing-up-with-mysql/" target="_blank">Growing Up with MySQL: How we scaled our primary datastore by over 20x in 3 weeks</a></div>
<div class="sreweekly-description">Christine Spang of Nylas shares a story of migrating from RDS to sharded self-run MySQL clusters using SQLProxy. I love the detail here! I&#8217;m looking to get more deeply technical articles in SRE Weekly, so if you come across any, I&#8217;d love it if you&#8217;d point them out to me.</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/production-ready/complacency-the-enemy-of-resilience-8123bc4210f9#.8bcgcwmkf" target="_blank">Complacency: The Enemy of Resilience</a></div>
<div class="sreweekly-description">Here&#8217;s the latest in Mathias Lafeldt&#8217;s <i>Production Ready</I> series. He makes the argument that too few failures can be a bad thing and argues for a chaos engineering approach.</p>
<blockquote><p> Complacency is the enemy of resilience. The longer you wait for disaster to strike in production — merely hoping that everything will be okay — the less likely you are to handle emergencies well, both at a technical and organizational level.</p></blockquote>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://www.timesketch.org/" target="_blank">timesketch</a></div>
<div class="sreweekly-description">Timesketch is a tool for building timelines. It could be useful for building a deeper understanding of an incident as part of a retrospective.</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://anthonycaiafa.com/2016/04/10/sre-cultural-narnia/" target="_blank">SRE: An incomplete guide to cultural Narnia</a></div>
<div class="sreweekly-description">Anthony Caiafa shares his take on what SRE actually means. To me, SRE seems to be a field even more in flux than DevOps, and definitions have yet to settle. For example, I feel that there&#8217;s a lot that a non-programmer can add to an SRE team &#8212; you just have to really think about what it means to engineer reliability (e.g. process design).</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://githubengineering.com/introducing-dgit/" target="_blank">Introducing DGit</a></div>
<div class="sreweekly-description">Github details Dgit, their new high-availability solution for storing git repos internally. Previously, they used pairs of servers with raid mirroring in each and synchronized using DRDB.</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://hashbang.ca/2016/04/07/book-review-site-reliability-engineering" target="_blank">Book review: Site Reliability Engineering</a></div>
<div class="sreweekly-description">An early review of Google&#8217;s new SRE book by Mike Doherty, a Google SRE. He was only peripherally involved in the publication and gives a fairly balanced take on the book. For an outside perspective, see danluu&#8217;s detailed <a href="http://danluu.com/google-sre-book/">chapter-by-chapter notes</a>.</div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://www.infoworld.com/article/3051017/cloud-computing/the-importance-of-dogfooding-in-the-cloud.html" target="_blank">The importance of &#039;dogfooding&#039; in the cloud</a></div>
<div class="sreweekly-description">Amazon.com famously runs on AWS, so any AWS outage could potentially impact Amazon. Google, on the other hand, doesn&#8217;t currently run any of its external services on Google Cloud Platform. This article makes the argument that doing so would create a much bigger incentive to improve and sustain GCP&#8217;s reliability.</p>
<blockquote><p>However, when Google had its recent 12-hour outage that took Snapchat offline, it didn&#8217;t impact any of Google&#8217;s real revenue-generating services. [&#8230;] What would the impact have been if Google Search was down for 12 hours?</p></blockquote>
<p><small><em>Thanks to Charity for this one.</em></small></div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://www.independent.co.uk/life-style/gadgets-and-tech/news/man-accidentally-deletes-his-entire-company-with-one-line-of-bad-code-a6984256.html" target="_blank">Man accidentally &#8216;deletes his entire company&#8217; with one line of bad code</a></div>
<div class="sreweekly-description">Oops.</p>
<p>Note that there&#8217;s been some question on hangops #sre on whether this is a hoax. Either way I could totally see it happening.</p></div>
</p>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://blog.statuspage.io/on-writing-well-when-you-re-in-a-damn-hurry" target="_blank">On Writing Well When You’re In A Damn Hurry</a></div>
<div class="sreweekly-description">I love the fact that statuspage.io is the author of this article. How many of us have agonized over the exact wording of a status site post?</div>
</p>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="http://www.techtimes.com/articles/148931/20160411/yahoo-mail-goes-down-for-many-users-in-europe-and-us.htm">Yahoo Mail</a>
<li><a href="http://www.bloomberg.com/news/articles/2016-04-11/buffett-s-business-wire-unavailable-as-news-releases-halted">Business Wire</a>
<li><a href="https://status.cloud.google.com/incident/compute/16007?post-mortem">Google Compute Engine</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<p>GCE suffered a severe network outage. It started as increased latency and at worst became a full outage of internet connectivity. Two days after the incident, Google released the best postmortem I&#8217;ve seen in a very long time. Full transparency, a terrible juxtaposition of two nasty bugs, a heartfelt apology, fourteen(!) remediation items&#8230; it&#8217;s clear their incident response was solid and they immediately did a very thorough retrospective.</p>
</ul>
<li><a href="http://www.networkworld.com/article/3055994/internet/something-strange-just-happened-with-north-koreas-internet.html">North Korea</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<p>North Korea had a series of internet outages, each of the same length at the same time on consecutive days. It&#8217;s interesting how people are trying to learn things about the reclusive country just from this pattern of outages.</p>
</ul>
<li><a href="http://www.cloudpro.co.uk/leadership/risks/5940/blizzards-battlenet-taken-offline-by-hackers">Blizzard&#039;s Battle.net</a>
<li><a href="http://www.techtimes.com/articles/150224/20160414/twitter-experiences-brief-service-disruption-across-the-globe.htm">Twitter</a>
<li><a href="http://www.channelnomics.eu/channelnomics-eu/news/2454643/misco-apologises-for-seven-hour-website-outage">Misco</a>
<li><a href="https://www.cryptocoinsnews.com/uncertainty-alt-coin-markets-popular-exchanges-suffer-downtime/">Two Alt-Coin exchanges (Shapeshift and Poloniex)</a>
<li><a href="http://abcnews.go.com/US/wireStory/home-depot-electronic-outage-slowed-card-purchases-38277063">Home Depot</a>
</ul>
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