Active-Active
In an active-active deployment, there are multiple active nodes (across data centers, zones, or regions) and traffic is routed to all of them. This is different from an active-passive deployment where a single active node processes all reads and writes, while a “passive” replica sits at the ready in case of a disaster.
The main purpose of an active-active cluster is to distribute workloads across all nodes to handle demanding workloads more efficiently and prevent a single node from getting overloaded. Because there are more nodes available to serve, the database can handle more requests at the same time, resulting in improved throughput and faster response times. This helps applications handle more users and scale more effectively as traffic increases.
There is no single point of failure with active-active deployments. If one node goes offline, the others will continue to serve traffic automatically, leading to increased availability and less downtime. However, active-active setups can be more difficult to configure, and it is still possible for consistency issues to arise if an outage happens at the wrong time.