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What are the features of DDBMS

Subject: Distributed Database

Topic: Concept and Overview Distributed Database system

Difficulty: Medium

2 Answers
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1) Databases in the collection are logically interrelated with each other. Often they represent a single logical database.

2) Data is physically stored across multiple sites. Data in each site can be managed by a DBMS independent of the other sites.

3) The processors in the sites are connected via a network. They do not have any multiprocessor configuration.

4) A distributed database is not a loosely connected file system.

5) A distributed database incorporates transaction processing, but it is not synonymous with a transaction processing system.

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Features of a Distributed DBMS

  1. A distributed DBMS is a collection of logically related shared data.
  2. The data in a distributed DBMS is split into a number of fragments or partitions.
  3. Fragments may be replicated in a distributed system.
  4. Fragments/replicas are allocated to different sites.
  5. In a distributed system, the sites are linked by communications network.
  6. The data at each site is under the control of a DBMS.
  7. The DBMS at each site has its own right, that is, it can handle local applications independently.
  8. Each DBMS in a distributed system participates in at least one global application.
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