1 — Reliability Principles

Site Reliability Engineering: From Foundations to Internet-Scale Systems

The complete 184-chapter, 15-part Site Reliability Engineering curriculum — from Linux internals and distributed-systems theory through reliability engineering, observability, incident response, platform engineering, and Staff/Principal-level MAANG interview preparation, ordered the way SRE expertise actually develops rather than as a topic index.

10 — Failure Domains

Drawing the boundary around 'what breaks together' — AZ, region, tenant, deploy group — so a single fault has a bounded, known blast radius instead of an open-ended one.

11 — Redundancy Patterns

Active-active, active-passive, and N+1 redundancy, and the trade-off each makes between failover speed, cost, and the complexity of keeping replicas actually consistent.

12 — Graceful Degradation

Designing a system to shed non-critical functionality under stress instead of failing completely — and deciding in advance what's non-critical.

13 — Backpressure

The signal a slow consumer sends a fast producer to prevent unbounded queue growth, and why a system without backpressure fails by silently falling further behind until it doesn't.