SRE Reliability Engineering: From Theory to Practice
Reliability Engineering: More Than Just “Not Breaking” The goal of reliability engineering is not to pursue zero failures — that’s neither realistic nor economical. The real goal is: given that failures are inevitable, make the system capable of fast detection, automatic recovery, and continuous learning. Google SRE proposes a core formula: MTTR << MTBF / (MTBF + MTTR) × (1 - SLO) This formula reveals a key insight: when the time between failures (MTBF) is much greater than the repair time (MTTR), system availability naturally approaches the SLO target....