A modern distributed database requires a combination of horizontal scaling (scaling out) and vertical scaling (scaling up), which involves mastering elasticity, eliminating hotspots, uniform data partitioning, dynamic cluster management, and Smart Client technology. To achieve this, companies can use a shared-nothing architecture, optimize storage tiering, and implement strong consistency with high performance and availability. The system should also support geo-distributed transactions, enabling seamless operation across distances while balancing consistency, availability, and performance. By embracing these modern distributed database essentials, businesses can stay ahead in an increasingly interconnected world.