DirectConnect for z/OS consists of a server and one or more service libraries. The server provides the framework in which the service libraries operate. The DB2 Access Service Library is the program component of DirectConnect for z/OS that works with MainframeConnect for DB2 UDB to access DB2 data.
The following figure shows the relationship of the DB2 Access Service Library with components of the client workstation, LAN, and mainframe environments.
Figure 1-2: DirectConnect for z/OS environment
As shown, the request from a client application uses the LAN to communicate with the DirectConnect server. From there, either TRS or a DB2 access service routes the request to the appropriate CICS region. Then the request accesses data on the DB2 UDB database.
For more information on how to create multiple TRS libraries, see the Mainframe Connect DirectConnect Transaction Router User’s Guide.
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