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<title>SRE Weekly Issue #186 &#8211; SRE WEEKLY</title>
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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-186/">SRE Weekly Issue #186</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-186/">September 22, 2019</a>
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<a href="https://sreweekly.com/sre-weekly-issue-186/" title="Permalink to SRE Weekly Issue #186" 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, VictorOps:</h2>
<p>See why DevOps teams are more collaborative and transparent than traditional IT operations – helping them build highly efficient incident management and response systems:</p>
<p><a href="http://try.victorops.com/sreweekly/devops-incident-management-guide">http://try.victorops.com/sreweekly/devops-incident-management-guide</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://dbmsmusings.blogspot.com/2019/05/introduction-to-transaction-isolation.html" target="_blank">DBMS Musings: Introduction to Transaction Isolation Levels</a></div>
<div class="sreweekly-description">
<p>This article is highly technical, while also not being overwhelmingly detailed.</p>
<blockquote><p>It is very important that a database user is aware of the isolation level guaranteed by the database system, and what concurrency bugs may emerge as a result.</p></blockquote>
<p><small>Daniel Abadi</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.blameless.com/how-to-avoid-the-5-sre-implementation-traps-that-catch-even-the-best-teams/" target="_blank">How to Avoid the 5 SRE Implementation Traps that Catch Even the Best Teams</a></div>
<div class="sreweekly-description">
<p>The traps are:</p>
<blockquote>
<ol>
<li>You don’t have enough cross-team usage or buy-in.</li>
<li>Your difficult and dense process is slowing down incident response.</li>
<li>Postmortems are underutilized and don’t encompass in-depth learnings.</li>
<li>You wait for incidents to happen.</li>
<li>You stop at incident management without SLOs.</li>
</ol>
</blockquote>
<p><small>Lyon Wong — Blameless</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/@dm03514/distributed-tracing-impact-on-engineering-organizations-d2f775e94aae" target="_blank">Distributed Tracing: Impact on Engineering Organizations</a></div>
<div class="sreweekly-description">
<p>Need to argue the benefits of implementing distributed tracing in your organization? This article will help you get started.</p>
<p><small>dm03514</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://charity.wtf/2019/09/20/love-and-alerting-in-the-time-of-cholera-and-observability/" target="_blank">Love (and Alerting) in the Time of Cholera (and Observability)</a></div>
<div class="sreweekly-description">
<blockquote><p>The question is: what is the proper role of alerting in the modern era of distributed systems?  Have alerting best practices changed with the shift from monitoring and known-unknowns to observability and unknown-unknowns?</p></blockquote>
<p><small>Charity Majors</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blogs.dropbox.com/tech/2019/09/enhancing-bandaid-load-balancing-at-dropbox-by-leveraging-real-time-backend-server-load-information/" target="_blank">Enhancing Bandaid load balancing at Dropbox by leveraging real-time backend server load information</a></div>
<div class="sreweekly-description">
<p>Round-robin load balancing often isn&#8217;t good enough; it&#8217;s necessary to intelligently route requests to nodes that aren&#8217;t overloaded. How do you get information about backend health to distributed load balancer nodes efficiently? A: add a response header.</p>
<p><small>Haowei Yuan, Yi-Shu Tai, and Dmitry Kopytkov — Dropbox</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://making.pusher.com/splash-the-cache-how-caching-improved-our-reliability/" target="_blank">Splash the cache: how caching improved our reliability</a></div>
<div class="sreweekly-description">
<p>By adding in-memory caching with a mere 3-second TTL, these folks achieved a ~75% cache hit rate, allowing them to withstand request spikes without an outage.</p>
<p><small>MINA GYIMAH — Pusher</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.tokbox.com/incidents/kp1v7g5yqmc2">Tokbox</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage"><small><em>Thanks to Aos Dabbagh for this one.</em></small></li>
</ul>
</li>
<li><a href="https://status.chef.io/incidents/lj7h89v2v7r6">Chef (system administration tool)</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Many of us experienced failures in our Chef runs after their former employee <a href="https://github.com/sethvargo/chef-sugar/blob/master/README.md#chef-sugar">removed their code</a>. Chef posted a <a href="https://blog.chef.io/2019/09/19/chefs-position-on-customer-engagement-in-the-public-and-private-sectors/">followup</a> explaining their position on the matter.</li>
</ul>
</li>
<li><a href="https://status.fastly.com/incidents/kjrxdc6xs31s">Fastly</a></li>
<li><a href="https://reddit.statuspage.io/incidents/4q8mfp969hky?u=hxjfj9djsk48">Reddit</a></li>
<li><a href="https://www.outlookindia.com/newsscroll/indias-domain-hosting-provider-net4com-suffers-major-outage/1621007">Net4 (hosting provider)</a></li>
<li><a href="https://marketingland.com/performance-degradation-affecting-salesforce-clients-267699">Salesforce</a></li>
<li><a href="https://piunikaweb.com/2019/09/19/linkedin-down-and-not-loading-content-reportedly/">LinkedIn</a></li>
<li><a href="https://www.rt.com/news/468963-google-search-engine-down-reports/">Google Search</a></li>
<li><a href="http://feedproxy.google.com/~r/HerokuStatus/~3/EocpT5hc_x4/1901">Heroku</a></li>
<li><a href="https://status.squarespace.com/incidents/pjt4wpyrw9ws">Squarespace</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Also <a href="https://status.squarespace.com/incidents/ztgbt2stptcz">this one</a>.</li>
</ul>
</li>
</ul>
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