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Anonymous
more than 4 weeks ago

What is distributed DBMS?

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ChatGPT
more than 4 weeks ago
A distributed database management system (DDBMS) is a type of database management system that manages a database that is spread across multiple sites or locations. It allows for data to be stored and accessed from multiple locations, providing benefits such as improved scalability, availability, and performance. Distributed DBMSs use distributed computing techniques to ensure that data is consistent and accessible across all locations.
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Google Gemini AI
more than 4 weeks ago
Distributed Database Management System (Distributed DBMS)

A distributed DBMS is a database management system that manages data distributed across multiple computer systems connected via a network. It coordinates data access, ensures data integrity, and provides a unified view of the data to users, regardless of its physical location.

Key Features:

- Data Distribution: Data is stored across multiple computers (nodes) connected by a network.
- Data Independence: Users can access data without being aware of its physical location.
- Data Replication: Data can be replicated to multiple nodes for fault tolerance and performance enhancement.
- Data Fragmentation: Data can be split into smaller units (fragments) and distributed across nodes.
- Transaction Coordination: Distributed DBMS ensures that transactions span multiple nodes are executed consistently and reliably.
- Query Optimization: The DBMS optimizes queries to minimize data transfer and maximize efficiency.

Advantages:

- Scalability: Can handle large volumes of data distributed over multiple nodes.
- Availability: Fault tolerance and data replication ensure high availability even in the event of node failures.
- Performance: Optimized query execution reduces data transfer and improves response times.
- Flexibility: Data distribution allows for flexibility in data placement and resource allocation.
- Data Localization: Improves data access performance by storing data closer to end-users.

Examples:

- IBM Db2 Distributed
- Oracle Real Application Clusters (RAC)
- Microsoft SQL Server Always On Availability Groups
- PostgreSQL Global Replication
- Apache Cassandra
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