Timeouts, Retries & Circuit Breakers

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 06.4 of the 5 in Reliability & Operations. It runs about 3 hours across 5 lessons, and closes with Retry Storm — A retry policy is amplifying a small failure into an outage. Fix it without making the service less reliable.