Database Replication
The process of copying and maintaining database data across multiple servers for availability and performance.
Also: database mirroring · primary-replica
Definition
Database replication is the process of maintaining synchronized copies of database data across multiple servers. In primary-replica (master-slave) replication, all writes go to the primary server and are propagated to replicas, which serve read requests. Multi-primary replication allows writes to multiple nodes. Replication improves read performance, provides failover capability, and supports geographically distributed databases. Replication lag — the delay between writing to primary and replica — is a key consideration.
Example
“A global e-commerce platform uses database replication with primaries in the US and Europe so that users on each continent read from local replicas with low latency.”
Synonyms
- data mirroring
- database copying
- data synchronization
Antonyms / Opposites
- single instance
- no redundancy
Images
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Related Terms
- sharding
- high-availability
- failover
- primary-replica