Distributed database Management Systems

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Distributed database Management Systems

• Lecture 02

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• In the previous lecture .
• In todays lecture
• Introduction to Distributed Databases
• Major characteristics
• Objective of todays lecture is ..

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Distributed DB and DBMS
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• Distributed Database A collection of logically
  interrelated databases that are spread physically
  across multiple locations connected by a data
  communications link.

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Main Characteristics

• Data at multiple sites
• DM at each site ind.
• Local requirements
• Global perspective

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Where to apply

• Major two reasons that make an application a
  candidate to be DDBS application
• Large Number of Users
• Operation spread large geographical area

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Example Applications

• Banking
• Air Ticketing
• Business at multiple locations

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• Distributed DBMS A software system that permits
  the management of DDB and makes the distrib.
  transparent to the users
• Decentralized Database A collection of
  independent databases on non-networked computers.

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Thanks