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Errors are constructed, not discovered

Written by Ferd.ca / Original link on Apr. 13, 2022

2022/04/13Errors are constructed, not discoveredOver a year ago, I left the role of software engineering* behind to become a site reliability engineer* at Honeycomb.io. Since then, I've been writing a bunch of blog posts over there rather than over here, including the following:OnCallogy SessionsOn…


Plato's Dashboards

Written by Ferd.ca / Original link on Dec. 22, 2021

2021/12/22Plato's Dashboardsoriginal images: [1], [2]In the allegory, Socrates describes a group of people who have lived chained to the wall of a cave all their lives, facing a blank wall. The people watch graphs projected on the wall from metrics passing in front of a dumpster fire behind them an…


You've got to upgrade Rebar3

Written by Ferd.ca / Original link on May. 24, 2021

2021/05/24You've got to upgrade Rebar3Bad news. You have to upgrade Rebar3. Like right now. We just noticed that SSL validation had been partially disabled for years.This post covers:what's the problemhow to fix itwhat happenedwhy we think it hasn't been exploitedYou should definitely read the firs…


Surfacing Required Knowledge

Written by Ferd.ca / Original link on Mar. 19, 2021

2021/03/19Surfacing Required KnowledgeDisclaimerWhen I first started this blog, I had it in mind that I'd only write about things that were discrete and verifiable. I wanted to avoid doing the bullshit calls of being an Intellectual in Silicon Valley, or say to casting entire industries through one…


Home Alone: a Post-Incident Review

Written by Ferd.ca / Original link on Dec. 27, 2020

2020/12/27Home Alone: a Post-Incident ReviewOver the last few years I've been reading more and more about resilience engineering and all the related material when it comes to Learning From Incidents. This stuff has a way to stick with you and change how you think, and I found myself adjusting my pe…


Interval Tree Clocks

Written by Ferd.ca / Original link on Nov. 27, 2020

2020/11/27Interval Tree ClocksI wanted to gather some notes I've kept in my head over the years about Interval Tree Clocks. Interval Tree clocks have been presented in a 2008 paper by Paulo Sérgio Almeida, Carlos Baquero, and Victor Fonte. It's one of the most interesting and readable papers I've…