Distributed Relational Database Architecture (DRDA)

Definition - What does Distributed Relational Database Architecture (DRDA) mean?

Distributed Relational Database Architecture (DRDA) is a protocol set that allows multiple database systems and application programs to work together. Any combination of relational database management products that use DRDA can be connected to form a distributed database management system.

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Techopedia explains Distributed Relational Database Architecture (DRDA)

DRDA is a database interoperability standard from an industry consortium called The Open Group. It describes the architecture for distributed data and defines the rules for accessing distributed data. It was initially used in DB2 2.3.

DRDA has the following components:

Application Requester: Accepts SQL requests from applications and sends them to appropriate application servers for processing. Application programs can access remote data using this function.
Application Server: Receives requests from application requesters and processes them. The application server acts on the portions of requests that can be processed, and forwards remainder to database servers for further processing.
Database Server: Receives requests from the application server and other database servers. This server also supports distributed requests and forwards parts of the request to the database server to fulfill the request.