Since the screen layout is not actually a function of the transaction monitor, it is delegated to clients by the UTM application. The UTM application is thus the server. openUTM-Client with the interfaces CPI-C and XATMI allows you to create client programs that work with the UTM application as the server.
However, you can also use client programs for load simulations of UTM applications.
The client/server concept
The aim of the client/server concept is to provide the individual users in a network with services (such as data, programs, devices) and to ensure that optimum use is made of the strong points of the individual systems.
The client/server concept is always implemented where many clients require the same service. An analogy to the client/server concept is as follows: the procedure or subroutine call sets up a client/server relationship between the main program and the subroutine. The only difference is that the called procedure now runs remotely from the “client”.
Clients (users of services) can request services and information from all servers in the network.
Servers (providers of services) provide services whereby shared information sources, such as files and databases, can be distributed randomly within a network configuration.