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<title>SRE Weekly Issue #128 &#8211; SRE WEEKLY</title>
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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-128/">SRE Weekly Issue #128</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-128/">July 1, 2018</a>
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<a href="https://sreweekly.com/sre-weekly-issue-128/" title="Permalink to SRE Weekly Issue #128" 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: 55%; color: #b0b0b0;">SPONSOR MESSAGE</h2>
<p>Looking to go serverless? Beau Christensen, VictorOps Director of Platform Engineering, and Tom McLaughlin, Founder of ServerlessOps, sat down to talk about when VictorOps decided to venture into AWS:</p>
<p><a href="http://try.victorops.com/SREWeekly/going-serverless">http://try.victorops.com/SREWeekly/going-serverless</a></p>
</div>
<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://scholar.harvard.edu/files/mickens/files/thesaddestmoment.pdf" target="_blank">The Saddest Moment</a></div>
<div class="sreweekly-description">
<p>Humor for SREs! This is the most hilarious thing I&#8217;ve read all week.</p>
<p><small>James Mickens — USENIX ;login:logout</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://utcc.utoronto.ca/~cks/space/blog/linux/LinuxBootOverview" target="_blank">A broad overview of how modern Linux systems boot</a></div>
<div class="sreweekly-description">
<p>This focuses on various ways that Linux systems can <em>fail</em> to boot.</p>
<p><small>Chris Siebenmann</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://devops.com/devops-chat-sre-w-stig-sorensen-of-bloomberg/" target="_blank">DevOps Chat: SRE w/ Stig Sorensen of Bloomberg</a></div>
<div class="sreweekly-description">
<p>A (raw) transcript of a chat about Bloomberg&#8217;s adoption of SRE practices. It might be worth dropping it in a text editor and removing all occurrences of the phrase &#8220;sort of&#8221;. The real meat is in the discussion of what Bloomberg has learned (text search: &#8220;lessons learned&#8221;) and how to sell SRE as necessary in a company (text search: &#8220;ROI&#8221;).</p>
<p><small>Alan Shimel — devops.com</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://making.pusher.com/how-pusher-channels-has-delivered-10000000000000-messages/" target="_blank">How Pusher Channels has delivered 10,000,000,000,000 messages</a></div>
<div class="sreweekly-description">
<blockquote><p>Channels employs three time-honored techniques to deliver these messages at low latency: fan-out, sharding, and load balancing. Let’s look inside the box!</p></blockquote>
<p><small>Jim Fisher — Pusher</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.ably.io/how-to-implement-consistent-hashing-efficiently-fe038d59fff2" target="_blank">How we implemented consistent hashing efficiently</a></div>
<div class="sreweekly-description">
<p>An in-depth explanation of how consistent hashing works. Love the hand-drawn diagrams!</p>
<p><small>Srushtika Neelakantam — Ably</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://twitter.com/colmmacc/status/1012719876706840578" target="_blank">Colm MacCárthaigh on Twitter: random number generation</a></div>
<div class="sreweekly-description">
<blockquote><p>Have you ever needed to generate a random number in code? whether it&#8217;s for rolling a dice, or shuffling a set, this tweet thread is here for you! There&#8217;s no reason that it should be easy or obvious, very experienced programmers repeat common mistakes. I did, before I learned &#8230;</p></blockquote>
<p>Not strictly SRE-related, but then again it&#8217;s by Colm MacCárthaigh, who <em>is</em> SRE-related.</p>
<p><small>Colm MacCárthaigh</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://feedproxy.google.com/~r/ClPlBl/~3/HuV7dYkNxJk/understanding-error-budget-overspend-cre-life-lessons.html" target="_blank">Understanding error budget overspend &#8211; part one &#8211; CRE life lessons</a></div>
<div class="sreweekly-description">
<p>What should you do if you blow your error budget? Depends on whether you leaked it like a dripping faucet or splurged it all on big outages. Either way, you&#8217;ll need to investigate and make a plan.</p>
<p><small>Adrian Hilton, Alec Warner and Alex Bramley — Google</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://code.fb.com/core-data/migrating-messenger-storage-to-optimize-performance/" target="_blank">Migrating Messenger storage to optimize performance</a></div>
<div class="sreweekly-description">
<p>I love the two-method approach: a simple migration path for users that aren&#8217;t active all the time, and a more careful (and more complex) path for very busy users.</p>
<p><small>Xiang Li and Thomas Georgiou — Facebook</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://twitter.com/harshaunplugged/status/1012765568892485632" target="_blank">Sri Harsha Kalavala on Twitter: alert on support page views</a></div>
<div class="sreweekly-description">
<blockquote><p>If you haven&#8217;t implemented alerts on support page views yet, do it now!! and thank me later. Here&#8217;s a view of how our dashboard looked as of a few minutes ago &#8211; a clear demonstration of user impact that supplements existing monitors and alerts.…</p></blockquote>
<p>Click through for the graph. Monitor status and support page views&#8230; do we actually need any other monitoring? Only half-kidding.</p>
<p><small>Sri Harsha Kalavala</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.cloud.google.com/incident/bigquery/18037#18037005">Google BigQuery</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Google posted a followup analysis of the BigQuery outage on June 22.<br />
<blockquote><p>A new release of the BigQuery API introduced a software defect that caused the API component to return larger-than-normal responses to the BigQuery router server.</p></blockquote>
</li>
</ul>
</li>
<li><a href="https://status.fastly.com/incidents/gkjfzv6vmgsn">Fastly</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage"><small><em>Full disclosure: Fastly is my employer.</em></small></li>
</ul>
</li>
<li><a href="https://www.google.com/appsstatus#hl=en&amp;v=issue&amp;sid=22&amp;iid=5472df2c903714bd8138fccd76e150dd">G Suite Status Dashboard</a></li>
<li><a href="https://status.slack.com/2018-06/142edcb9e52c7663">Slack</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">This week, Slack had a ~3-hour, near-total outage. Click through for their followup post.<br />
<blockquote><p>The network problems were caused by a bug included in an offline batch process of data, which resulted in unexpected network spikes and led all of our customers to become disconnected and unable to reconnect.</p></blockquote>
</li>
</ul>
</li>
<li><a href="https://www.slashgear.com/google-home-and-chromecast-outage-leaves-users-livid-27535829/">Google Home and Chromecast</a></li>
</ul>
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