Federated database; Multi-database; Parallel database; Peer-to-peer database
A distributed database  is a database where data management is distributed over several nodes (computers) in a computer network. In a central DBMS the data is managed by one node whereas in a distributed DBMS the data is managed by several nodes. A distributed DBMS is a database manager consisting of several nodes distributed over a network. Each node is a database manager by itself that communicates with other nodes in the network. In a regular distributed DBMS it is up to the database administrator to manually specify how data collections (e.g., relational tables) are distributed over the nodes when a distributed database is designed. Queries and updates to the distributed relations are transparently translated by the distributed DBMS into data operations on the affected nodes giving the user the impression of using a single database, called query and update transparency. Thus the...
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