Active-Passive
Active-Passive is a high-availability architecture pattern where one system (the active node) handles all operational tasks, while another system (the passive node) remains on standby, ready to take over if the active node fails. This setup ensures minimal downtime and data consistency by replicating state or data from the active to the passive node. It is commonly used in databases, load balancers, and server clusters to provide fault tolerance and reliability.
Developers should learn and implement Active-Passive architectures when building systems that require high availability and disaster recovery, such as financial applications, e-commerce platforms, or critical infrastructure services. It is particularly useful in scenarios where downtime is unacceptable, as it allows for seamless failover without service interruption, ensuring business continuity and data integrity.