Reference

🔴 P0 — foundation for reasoning about inter-service communication, latency, and failure modes

🔴 P0 — the default replication strategy for most production databases

🟡 P2 — mentioned in designs but rarely the crux; know the trade-offs

🔴 P0 — the first data decision in every design; determines query flexibility, scaling, and consistency

🔴 P0 — the spectrum from linearisability to eventual consistency

🔴 P0 — appears in nearly every system design; the single entry point pattern