Centralized database system: The centralized database system consist of a single processor together with it associated data storage devices and other peripherals. It is physically confined to a single location. The data can be accessed from the multiple sites with the use of a computer network while the database is maintained at the central site.
Disadvantages of centralized database system::
Client server dbms:- Client / server architecture of database systems has two logical components namely client and server. Client is generally personal computer or workstations whereas server is large workstations, mini range computer system or a mainframe computer system. The application and toals of DBMS run on one or more client platforms, while the DBMS softwares reside on the server. The server computer is called front end. These server and client computer are connected into a network. The application and tools act as client of the DBMS making requests for its services; client/ server architecture handles the graphical user interface (GUI) and does computations and other programming of interest to the end user.