Database Replication

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What Does Database Replication Mean?

Database replication is a technique through which an instance of a database is exactly copied to, transferred to or integrated with another location. Database replication enables the copying of a database file from a master database management system (DBMS) and its exact deployment on a slave DBMS.

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Techopedia Explains Database Replication

Database replication is primarily used in distributed DBMS environments where a single database is deployed, used and updated at several simultaneous locations. Database replication is generally performed frequently in a transactional database that is routinely and dynamically updated. Typically, database replication is done to provide a consistent copy of data across all the database nodes. It also removes any data redundancy, merging of two databases into one and updating slave databases with outdated or incomplete data.

Database replication has three distinct types:

  • Transactional replication
  • Snapshot replication
  • Merge replication
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Margaret Rouse
Technology Expert
Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.