You now understand SRE system design at the level expected in interviews.
What to remember:
- Design for failure: redundancy at every layer, automated failover
- Monitoring systems: consider cardinality, retention, query patterns
- Deployment pipelines: progressive rollouts, automated rollback, feature flags
- Logging: tiered storage, sample verbose logs, budget for cost
- DR: Define RTO/RPO, choose replication strategy, test regularly
- NALSD: Concrete estimates (QPS, storage, bandwidth, compute)
Next, you'll practice troubleshooting scenarios.