4 ms·

I'm sure this is not new, but still useful to get the word out about the power of universal X-Request-Id: https://twitter.com/dhh/status/795732523640766464 htt

• AYBABTME 10y ago
  Request IDs and their variants are only giving you correlated events, they don't encode enough information to connect causality and ordering of events. Basically: with request IDs you get a unordered bag of events, with proper tracing (trace id/span id/parent id) you get a DAG of events. In practice, the analysis a DAG allows you to perform are way more powerful. So if you're in the process of setting that request ID stuff up, consider doing the tracing way.