Leader-Follower
Leader-Follower is a concurrency design pattern used in multi-threaded or distributed systems where one thread (the leader) handles all I/O events, while other threads (followers) wait to be promoted to handle new connections or tasks. It optimizes resource usage by reducing context switching and synchronization overhead, commonly applied in high-performance server architectures like web servers or database systems.
Developers should learn this pattern when building scalable, high-throughput systems that require efficient handling of multiple concurrent connections, such as web servers, real-time applications, or network services. It is particularly useful in scenarios where minimizing latency and maximizing throughput are critical, as it reduces the overhead of thread management and synchronization compared to other patterns like thread-per-connection.