Distributed database system
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A distributed database system is a database in which portions of the database are stored on multiple computers within a network. This provides advantages like reliability if one site crashes, and speed since information is distributed rather than centralized. However, proper hardware and software is needed to connect the distributed sites, and there may be connection errors that impact users.
Distributed database system
- 1. DISTRIBUTED DATABASE SYSTEM By M. AHMAD MAHMOOD
- 2. Database A database is a collection of information that is organized so that it can be easily accessed, managed and updated. Data is organized into rows, columns and tables, and it is indexed to make it easier to find relevant information. Data gets updated, expanded and deleted as new information is added. Databases process workloads to create and update themselves, querying the data they contain and running applications against it.
- 3. Database Management System (DBMS) A database management system (DBMS) is system software for creating and managing databases. The DBMS provides users and programmers with a systematic way to create, retrieve, update and manage data.
- 4. Types of Data Base There are three types Data Base Systems: 1. Centralized Data Base System. 2. Distributed Data Base System. 3. Decentralized Data Base System.
- 5. Centralized database A centralized database holds all data on a central computer such as a mainframe computer or server.
- 6. Distributed Database A distributed database is a database in which portions of the database are stored on multiple computers within a network.
- 7. Decentralized Database The user would have to connect to the network and they will have access to the site that is connected to the user’s computer.
- 8. Advantages of DDBS Reliability, if one of the sites crashes, the system will keep running with the other sites. Speed, it is faster because the information is distribute and not packed as a whole. Open system, the system could connect to other networks to make it bigger and accessible everywhere.
- 9. Disadvantages of DDBS Open system, the system could connect to other networks to make it bigger and accessible everywhere. Proper hardware and software, the database needs proper hardware and software to run properly, this is expensive to get. Troubleshooting, there might be connection error that could affect the use of the database by other users.
- 10. Basic Differences b/w Databases DecentralizedDistributed DatabaseCentralized Database Centralized database have a central computer. The distributed database has several central computers. Decentralized database are separated and have different central computers.