|1. Database Replication is to make copies of database for backup, performance, reliability, or preservation.
2. The partial or full duplication of data from a source database to one or more destination databases. Replication may use any of a number of methodologies including mirroring or shadowing, and may be performed synchronous, asynchronous, or point-in-time depending on the technologies used, recovery point requirements, distance and connectivity to the source database, etc. Replication can if performed remotely, function as a backup for disasters and other major outages. (Similar Terms: File Shadowing, Disk Mirroring)
(Source: Disaster Recovery Institute International / Disaster Recovery Journal - DRII/DRJ)