Observability

Failure modes and blast radius, SLOs and error budgets, the three signals of observability, the retry patterns that cause outages rather than preventing them, and shipping a schema change without downtime.

This module is 06.3 of the 5 in Reliability & Operations. It runs about 4 hours across 5 lessons, and closes with Signal — Latency has tripled and nothing is down. Find the cause with the telemetry you already have.