MySQL Replication
MySQL Replication is a feature that allows data from one MySQL database server (the source) to be automatically copied to one or more MySQL database servers (the replicas). It works by recording changes on the source server in a binary log, which replicas then read and apply to their own databases, enabling data redundancy, load balancing, and high availability. This process supports various topologies, such as master-slave or master-master, and can be configured for synchronous or asynchronous replication.
Developers should learn MySQL Replication when building scalable applications that require data backup, read scalability, or disaster recovery, such as e-commerce platforms, content management systems, or financial services. It is particularly useful for offloading read queries to replicas to reduce load on the source server, ensuring data consistency across distributed systems, and facilitating zero-downtime maintenance or upgrades.