Diversity and inclusion make our companies stronger and more effective. This article has lots of links with evidence of why diversity matters and how to get your company on the road to improvement.

Sara Kassabian — GitLab

Starting on the road to chaos engineering is about more than just figuring out what experiments to run. Spreading knowledge and gaining buy-in before you start is critical.

Deven Samant — Business 2 Community

DNS propagation and inconsistent resolver behavior has bitten me so many times in my career.

Julia Evans

I don’t often have enough time to listen to podcasts, but when it’s these two, I had to. Jaime and Emil talk about post-incident reviews, geeking out about incidents, and their philosophy on publishing a zine.

Scott McAllister — Page It To the Limit Podcast (PagerDuty)

As so often happens, their attempts to fix a problem caused other problems. Has that happened to you? I’d love to read your story about it!

This article opens with a great story about how to help someone feel better when they are a contributing factor in an outage.

Tanya Reilly

I’ve used this technique in the past with a single-page app and a highly-cacheable API, to ensure stability even when the backend goes down.

Patrick Hamann

Full disclosure: Fastly is my employer.

Here’s a deep dive into how your CA’s certificate can affect your application’s reliability — at least in the eyes of your customers.

Scott Helme

Here’s Coinbase’s followup from their outage last week.

Michael de Hoog — Coinbase

Kyle Kingsbury recently did an analysis of PostgreSQL 12.3 and found that under certain conditions it violated guarantees it makes about transactions, including violations of the serializability transaction isolation level.

I thought it would be fun to use one of his counterexamples to illustrate what serializable means.

Lorin Hochstein

Failure mode and effects analysis (FMEA) is a decades-old method for identifying all possible failures in a design, a manufacturing or assembly process, or a product or service.

If you’ve been tasked with applying FMEA in your SRE work, this article will get you started.

Matthew Helmke

This article in a nutshell:

• Nines don’t matter if users aren’t happy (h/t Charity Majors)
• Chaos engineering

Kolton Andrus — Gremlin

I hadn’t heard of this distinction before. If you haven’t either, click through to find out more.

Ayende Rahien — RavenDB

In our experience, the three big sources of production stress are:

• Toil
• Bad monitoring
• Immature incident handling procedures

Cheryl Kang — Google

ProPublica picks apart the incident in exhaustive detail, showing how multiple problems interwoven in the organization contributed to this tragedy.

Robert Faturechi, Megan Rose and T. Christian Miller — ProPublica

There’s a great review of Rasmussen’s safety boundary model, which I wasn’t previously familiar with. A system moves between three boundaries:

• the boundary to economic failure
• the boundary of unacceptable work load
• the boundary of functionally acceptable performance

Lorin Hochstein

This one includes a really nifty graph showing how reliable your N backend microservices need to be in order to hit a given reliability target R.

Bill Duncan

Here are the results of the survey I linked here a couple weeks ago. There are some interesting and surprising results, well worth a read.

Rich Burroughs — FireHydrant

A commonly-used CA’s Root certificate expired, causing some havoc. Even though Sectigo did everything right, some software didn’t handle the transition to the new root well.

Paul Ducklin — Naked Security

Casey Rosenthal tips over a herd of sacred cows with this talk that opens with 6 myths about reliable systems.

Casey Rosenthal — Verica

This is written as talking about scale during a job interview, and it’s a pretty good read even if you’re not interviewing right now.

Denise Yu

John Allspaw says we should ask “how”, not “why”. Hollnagel and Woods say that finding out why a joint cognitive system does what it does rather than how. Who’s right?

Lorin Hochstein

Yay, another issue! This one revolves around learning from incidents from organizations in other fields (Bose and NASA).

Jaime Woo and Emil Stolarsky — Incident Labs

This is a followup analysis of a Google Hangouts oiutage from last month.

Google

Catchpoint is holding a mini-conference on the ways that SRE has changed as we shift to all-remote work, and I’m super-excited to be on the Q&A panel! Hope to see you there.

Catchpoint

A seasoned pro discusses some pitfalls of cloud-based architecture based on hard-won experience.

Rachel by the bay

Monzo is back with updates on how their on-call has changed since their original article in 2018.

Shubheksha Jalan — Monzo

Along with this rockin’ article about why it’s important to make on-call bearable, Incident Labs also has a survey on your on-call experience. Click through for the link.

Incident Labs

This really crystallizes a lot of my concerns with anomaly detection.

Danyel Fisher — The New Stack / Honeycomb

If you ask someone why they did something, they’re likely to invent a logical-sounding reason without meaning to.

Lorin Hochstein