The following diagram contains an example to show how the distribution of UDS/SQL databases can be achieved via a link using UDS-D.
Figure 13: Distributed databases with UDS-D
An application program is connected to a configuration at startup with the commands:
/SET-FILE-LINK LINK-NAME=DATABASE,FILE-NAME=configuration-name /START-EXECUTABLE-PROGRAM FROM-FILE=(LIB=...,ELEM=...)
This configuration is considered the local configuration in relation to the application program. In figure 13, the configuration CONF-A is local to the application program AP-A; configuration CONF-B is local to the application program AP-B, and so on.
All other configurations are remote configurations for the application program, i.e. the configurations CONF-B and CONF-C are remote for the application program AP-A.
In the reverse case, every application program that is connected to a configuration is considered local to that configuration; all other application program are remote. In other words, the application program AP-A is local to the configuration CONF-A, and the application programs AP-B and AP-C are remote.