Observability-Driven Development

on YouTube ↗37m

" summary

Argues that TDD alone is insufficient and promotes observability-driven development using real production data; describes the Parse Ruby→Go rewrite and a splitter that forks requests to compare live responses, plus feature flags, canaries and Honeycomb-style high-cardinality tracing. Shows a production-only experiment that simulates rate limiting to validate a shared cache change, uses cardinality analysis to decide compression, and reports that migrating to structured events and removing noisy alerts materially reduces pages.

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" chapters (10)

1. 0:00Introduction to observability
2. 2:11Limitations of TDD
3. 4:26Defining observability
4. 7:01The complexity of systems
5. 11:16Distributed system challenges
6. 13:23Testing in production
7. 19:05Observability-driven dev
8. 22:32Practical analysis examples
9. 26:46Proactive system management
10. 31:09The future of engineering

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