High availability (HA) systems utilize either active-active or active-passive clustering to minimize downtime and ensure system continuity, each with distinct methods and applications. Active-active architectures involve multiple nodes working simultaneously to distribute the workload, offering high throughput, fault tolerance, and scalability by adding nodes to the cluster. This setup is commonly used for applications requiring continuous uptime and fast performance, as it allows for load balancing and geographic distribution. However, it demands complex synchronization to maintain data consistency across nodes. Conversely, active-passive architectures rely on a primary active node with one or more standby nodes that activate during failover, emphasizing reliability and simplicity. This approach is well-suited for scenarios prioritizing data integrity and controlled failover, such as in finance or healthcare, where a single source of truth is essential, albeit with a brief service interruption during failover. Aerospike supports both architectures, offering flexibility in deployment strategies with its Cross Datacenter Replication (XDR) technology, facilitating seamless transitions between active-passive and active-active setups to meet varying operational needs while ensuring data consistency and availability.