Whither dashboard design?

Today’s public incident writeup comes courtesy of Brendan Humphries, the CTO of Canva. Like so many other incidents that came before, this is another tale of saturation, where the failure mode involves overload. There’s a lot of great detail in Humpries’s write-up, and I recommend you read it directly in addition to this post. What … Continue...

OpenAI recently published a public writeup for an incident they had on December 11, and there are lots of good details in here! Here are some of my off-the-cuff observations: Saturation With thousands of nodes performing these operations simultaneously, the Kubernetes API servers became overwhelmed, taking down the Kubernetes control plane in...

Well, who you gonna believe, me or your own eyes? – Chico Marx (dressed as Groucho), from Duck Soup: In the ACM Queue article Above the Line, Below the Line, the late safety research Richard Cook (of How Complex Systems Fail fame) notes how that we software operators don’t interact directly with the system. Instead, … Continue reading Your lying...

Think back on all of the availability-impacting incidents that have occurred in your organization over some decent-sized period, maybe a year or more. Is the majority of the overall availability impact due to: If you answered (2), then this suggests that the time-to-resolve (TTR) incident metric in your organization exhibits a power law...

Cloudflare consistently generates the highest quality public incident writeups of any tech company. Their latest is no exception: Cloudflare incident on November 14, 2024, resulting in lost logs. I wanted to make some quick observations about how we see some common incident patterns here. All of the quotes are from the original Cloudflare post....