Distributed Database Management Systems. Evolution of DDBMS. Decentralized database management systems (DDBMS) Interconnected computer systems Data/processing functions reside on multiple sites 1970’s: Centralized DBMS 1980’s: Social and Technical Changes Ad hoc capability required
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Distributed Database Management Systems
Shares database’s logical processing among physically, networked independent sites
Stores logically related database over physically independent sites
Database systems can be classified based on process distribution and data distribution