Glossary term
What is Replication? Meaning for developers
Keeping copies of data on several machines. Example: A primary database plus 3 read replicas.
Learn it properly · System DesignLesson 24: Database Replication: Leader, Follower and BeyondOne database server will eventually die, drown in reads, or be too far from your users. How leader-follower replication works, what replication lag does to real users, why failover is so hard, and how multi-leader and quorum systems handle conflicts.