canary
2 free lessons tagged canary across Programming. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
Canary Releases: Deciding With Evidence Instead of Nerve
A canary release sends a slice of real traffic to a new version and asks whether it is healthy. This lesson covers what to measure, why comparing the canary against the current version beats comparing against history, the statistics problem that makes small canaries weak evidence, and how automated promotion and rollback turn a judgement call into a rule.
Why Deploys Break Things, and the Strategies That Answer It
Deploying is the moment a working system is replaced by a different one while people are using it. This lesson covers what actually goes wrong at that moment, the research finding that shipping fast and shipping safely are not opposites, and the four deployment strategies as answers to one question: how many users meet a bad version before you find out.