Types of DBMS Architecture

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Types of DBMS Architecture


DBMS Architecture 
Database architecture can be seen as a single tier or multi-tier. But logically, database architecture is of two types like: 2-tier architecture and 3-tier architecture.

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2-Tier Architecture

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The 2-Tier architecture is same as basic client-server. In the two-tier architecture, applications on the client end can directly communicate with the database at the server side. For this interaction, API's like:  ODBC ,  JDBC  are used. The user interfaces and application programs are run on the client-side. The server side is responsible to provide the functionalities like: query processing and transaction management. To communicate with the DBMS, client-side application establishes a connection with the server side. Fig: 2-tier Architecture
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Advantages of DBMS

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Controls database redundancy:  It can control data redundancy because it stores all the data in one single database file and that recorded data is placed in the database. Data sharing:  In DBMS, the authorized users of an organization can share the data among multiple users. Easily Maintenance:  It can be easily maintainable due to the centralized nature of the database system. Reduce time:  It reduces development time and maintenance need. Backup:  It provides backup and recovery subsystems which create automatic backup of data from hardware and software failures and restores the data if required. multiple user interface:  It provides different types of user interfaces like graphical user interfaces, application program interfaces
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DBMS vs. File System

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There are following differences between DBMS and File system: DBMS File System DBMS is a collection of data. In DBMS, the user is not required to write the procedures. File system is a collection of data. In this system, the user has to write the procedures for managing the database. DBMS gives an abstract view of data that hides the details. File system provides the detail of the data representation and storage of data. DBMS provides a crash recovery mechanism, i.e., DBMS protects the user from the system failure. File system doesn't have a crash mechanism, i.e., if the system crashes while entering some data, then the content of the file will lost. DBMS provides a good protection mechanism. It is very difficult to protect a file under the file system. DBMS contains a wide variety of sophisticated techniques to store and retrieve the data. File system can't efficiently store and retrieve the data. DBMS takes care of Concurrent access of data using some form of lockin...
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