Distributed Database Quiz: Characteristics and FAQs

Questions and Answers

Define a distributed database and explain its characteristics.

A distributed database is a collection of shared data that is physically distributed over a computer network. It is characterized by logically-related data that is split into fragments, which may be replicated and allocated to different sites connected by a communication network. Each site is controlled by a DBMS, and the DBMS at each site can handle local applications autonomously. Additionally, each DBMS participates in at least one global application.

What is a distributed DBMS?

A distributed DBMS is a software system that allows the management of a distributed database and ensures that the distribution is transparent to users. It enables the coordination and control of the distributed data across multiple sites in a network.

What are the advantages of using a distributed DBMS?

Some advantages of using a distributed DBMS include improved data availability and reliability through data replication, enhanced performance by distributing the workload across multiple sites, and increased scalability and flexibility to accommodate changing requirements. It also allows for local autonomy, where each site can handle its own applications independently.

What are the main characteristics of a distributed database management system?

<p>The main characteristics of a distributed DBMS include a collection of logically-related shared data, data fragmentation and replication, allocation of fragments/replicas to sites, a communication network linking the sites, local control of data at each site by a DBMS, autonomous handling of local applications by each DBMS, and participation of each DBMS in at least one global application.</p> Signup and view all the answers

What is the role of the DBMS in a distributed database?

<p>The DBMS in a distributed database is responsible for managing and controlling the data at each site. It ensures data consistency, handles query processing and optimization, enforces data security and integrity, and coordinates the distributed transactions across multiple sites.</p> Signup and view all the answers

Study Notes

Introduction to Distributed Database Management Systems

A distributed database is a collection of shared data that is physically distributed over a computer network.
A distributed DBMS is a software system that manages the distributed database and makes the distribution transparent to users.
Characteristics of a distributed DBMS include logically-related shared data, data fragmentation, data replication, allocation of fragments/replicas to sites, communication network linking the sites, and control of data at each site by a DBMS.
Each DBMS at a site can handle local applications autonomously and participates in at least one global application.
Advantages of distributed DBMSs include improved performance, increased availability, scalability, and data reliability.
Distributed DBMSs allow for data sharing and integration across different locations and departments.
They provide better data access and query processing capabilities.
Distributed DBMSs can support distributed transactions, allowing for coordination and consistency across multiple sites.
They offer fault tolerance and disaster recovery capabilities.
Distributed DBMSs can be cost-effective by utilizing existing hardware and network infrastructure.
They can support data privacy and security by implementing access controls and encryption.
Distributed DBMSs are widely used in various industries such as finance, telecommunications, and e-commerce.