Master-Slave
Master-Slave is a computing architecture pattern where one device or process (the master) controls one or more other devices or processes (the slaves). It is commonly used in database replication, hardware systems, and distributed computing to manage data consistency, load distribution, and fault tolerance. The master handles coordination and decision-making, while slaves execute tasks or store data as directed.
Developers should learn this concept when working with systems requiring high availability, data redundancy, or scalable performance, such as in database clusters (e.g., MySQL replication) or IoT networks. It is particularly useful for scenarios where a single point of control is needed to synchronize multiple nodes, though modern alternatives are often preferred due to ethical and inclusivity concerns with the terminology.