DRDA TCP/IP server terminology

 

The same software is used for both DDM and DRDA^® TCP/IP access to DB2 Universal Database™ for iSeries™.

For brevity, the term DDM server is used rather than DRDA and DDM server in the following discussion. Sometimes, however, it might be referred to as the TCP/IP server, the DRDA server, or the server when the context makes the use of a qualifier unnecessary.

The DDM server consists of two or more jobs, one of which is what is called the DDM listener, because it listens for connection requests and dispatches work to the other jobs. The other job or jobs, as initially configured, are prestart jobs which service requests from the DRDA or DDM client after the initial connection is made. The set of all associated jobs, the listener and the server jobs, are collectively referred to as the DDM server.

The term client is used interchangeably with DRDA Application Requester (or AR) in the DRDA application environment. The term client will be used interchangeably with DDM source system in the DDM (distributed file management) application environment.

The term server is used interchangeably with DRDA Application Server (or AS) in the DRDA application environment. The term server will be used interchangeably with DDM target system in the DDM application environment. (Note that in some contexts, the System i™ product (the hardware) is also called a server.)

 

Parent topic:

Managing the TCP/IP server