Host (mainframe) teleprocessing applications are usually designed for standard terminal environments that access large enterprise data stores. These applications do not usually have the power and graphics capabilities of PCs. While host applications are limited in this way, PC applications are also usually limited to processing local data in development or limited-production modes.
With XDB Link, you can combine both environments in a distributed application running on the PC or host and have access to both host and PC relational databases.
XDB Link consists of 32-bit software components based on IBM's Distributed Relational Database Architecture (DRDA), which specifies a standard way for different relational databases on different operating systems to communicate over a network. XDB Link runs on Windows NT, Windows 95, and Novell NetWare servers, with a copy of the XDB Server relational database management system and a copy of a communication subsystem, such as:
These communication subsystems provide APPC and TCP/IP protocol support.
XDB Link uses client/server architecture that allows networked PCs access to host data using IBM's DRDA.
PCs have access to host data through XDB Link AR (Application Requester). The Application Requester allows remote DBMS platforms to broadcast requests for RDBMS access across the Systems Network Architecture (SNA) network.