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<header class="entry-header cf">
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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-66/">SRE Weekly Issue #66</a></h1>
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<div class="entry-date" itemprop="datePublished" >
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<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-66/">April 2, 2017</a>
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<a href="https://sreweekly.com/sre-weekly-issue-66/" title="Permalink to SRE Weekly Issue #66" class="email_only">View on sreweekly.com</a>
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<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;">
|
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<h2 style="text-align: center; font-size: 55%; color: #b0b0b0;">SPONSOR MESSAGE</h2>
|
||
<p>Are your incident management skills sharp, or are you continuously fighting fires? Take the free, online incident management assessment from VictorOps and compare your practices against leading DevOps methodologies: <a href="http://try.victorops.com/ima/sreweekly">http://try.victorops.com/ima/sreweekly</a></p>
|
||
</div>
|
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<h2>Articles</h2>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://engineering.heroku.com/blogs/2017-03-30-sockets-in-a-bind/" target="_blank">Sockets in a Bind: Troubleshooting Port Exhaustion in Heroku’s Routing Layer</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>I hope you’ll enjoy reading this debug session as much as I enjoyed co-writing it. My former co-worker and I did some serious digging to get to the bottom of an unexpected <tt>EADDRINUSE</tt> that caused a production incident.</p>
|
||
<p><small><em>Full disclosure: Heroku is my employer.</em></small></p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://blog.acolyer.org/2017/03/08/redundancy-does-not-imply-fault-tolerance-analysis-of-distributed-storage-reactions-to-single-errors-and-corruptions/" target="_blank">Redundancy does not imply fault tolerance: analysis of distributed storage reactions to single errors and corruptions</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Distributed filesystems provide high availability by duplicating data. In this research paper, the researchers created errorfs, a FUSE plugin that passes through a backing filesystem but introduces single-bit errors. Result: almost all major distributed filesystems missed the error, resulting in corruption.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://www.citusdata.com/blog/2017/03/23/a-look-into-disaster-recovery-and-high-availability-and-how-they-work-with-postgres-on-citus-cloud/" target="_blank">How we implement Disaster Recovery and High Availability with Postgres on Citus Cloud</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>The part I like most about this article is the emphasis on the difference between DR and HA.</p>
|
||
<p><small><em>Full disclosure: Heroku, my employer, is mentioned.</em></small></p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://blog.gremlininc.com/breaking-things-on-purpose-a519c0f5698b" target="_blank">Breaking Things on Purpose</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>The S3 outage a month ago is a great reminder that chaos experiments are useful not just for taking down parts of our own infrastructure, but also simulating the failure of external dependencies.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://jaxenter.com/humanops-time-make-devops-personal-132949.html" target="_blank">HumanOps: It’s time to make DevOps personal</a></div>
|
||
<div class="sreweekly-description">
|
||
<blockquote><p>There are several core HumanOps principles, but the most important one to remember is that human health impacts business health.</p></blockquote>
|
||
<blockquote><p>It’s about time that we recognised that engineers are humans who get stressed and need downtime and that there are strong business as well as social reasons why these needs should be met.</p></blockquote>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="http://www.sitereliability.engineer/2017/03/30/srecon17-videos/" target="_blank">Now Available – Videos from SREcon17</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Impressively quickly, USENIX has posted the videos from SRECon17 Americas! I’ve linked to a post by Woodland Hunter, whose review of SRECon I featured here two weeks ago, with links to the talks he reviewed and more.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://en.wikipedia.org/wiki/April_Fools%27_Day" target="_blank">April Foolishness</a></div>
|
||
<div class="sreweekly-description">
|
||
<ul>
|
||
<li><a href="https://victorops.com/blog/mttr-zero-one-weird-trick-solves-problems/">MTTR ZERO: one weird trick solves all the problems – VictorOps</a></li>
|
||
<li><a href="https://www.pagerduty.com/blog/pagerduty-proud-announce-launch-oncallclub-program/">PagerDuty is proud to announce the launch of our “OnCallClub” program</a></li>
|
||
</ul>
|
||
<p><small><em>The first 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://www.pagerduty.com/blog/incident-management-employee-morale/" target="_blank">How Incident Management Boosts Employee Morale</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>PagerDuty theorizes that if developers don’t trust the incident response process, they’ll fear outages and thus be less productive. Proper incident management eases that fear so that they feel safer deploying code.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://victorops.com/blog/reducing-alert-noise-going-1000-alerts-10-alerts-overnight/" target="_blank">Reducing Alert Noise: Going from 1000 Alerts to 10 Alerts Overnight</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>This article could be titled, “Use these three wacky tricks to reduce your pages by 100x!” In all seriousness, the methods described are aggregation (group related alerts), routing (sort alerts by team), and classification (page-worthy alerts versus warnings).</p>
|
||
<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://jvns.ca/blog/2017/04/01/slow-down-your-internet-with-tc/" target="_blank">Slow down your internet with tc</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>A nice primer on using <tt>tc</tt> to induce latency, which is really important when testing the resiliency of systems to network instability. Thanks, Julia!</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://medium.com/@jerub/risk-tolerance-of-services-3bdc8a61a065?source=rss-3ea3ed468e7c------2" target="_blank">Risk Tolerance of Services</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Here’s the second half of Stephen Thorne’s commentary on “Embracing Risk”, the third chapter in Google’s SRE book.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://www.pagerduty.com/blog/scaling-incident-management/" target="_blank">Scaling Incident Management</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>As your company grows in infrastructure size, number of employees, load, and other areas, how do you change your incident response to cope?</p>
|
||
</div>
|
||
</div>
|
||
<h2>Outages</h2>
|
||
<ul class="sreweekly-outages">
|
||
<li><a href="https://azure.microsoft.com/en-us/status/history/">Azure status history</a>
|
||
<ul class="sreweekly-outage">
|
||
<li class="sreweekly-outage">While following up on an outage from a couple of weeks ago, I came upon this archive of Azure incidents, several with detailed postmortems. It’s a goldmine of interesting RCAs, but I wish they’d give each its own page for easy linking.</li>
|
||
</ul>
|
||
</li>
|
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