iIS Process System Software
Repository server A server node (runs an iPlanet UDS Node Manager) that hosts the iIS central development repository and repository service.
Engine server A server node (runs an iPlanet UDS Node Manager) that hosts one or more engine components of one or more engines. One of the engine servers typically hosts an engine database. (Putting the engine database and the engine server on separate nodes is generally not recommended for performance reasons.)
Process development A node on which process developers (using the process development workshops) create the process definitions that are executed by iIS process engines.
Client application development A node on which client application developers create the process client applications that communicate with the iIS engine and perform the activities specified in process definitions.
System management A node used by a system manager to manage an iIS process system.
Runtime client A node that runs an iIS process client application, but which cannot be used for development.
While conceptually it is easier to think of each of these nodes as distinct, in reality there is no reason why some of the functions described could not be combined and performed on a single node. (In fact, you could run the whole system on a single node.)
For example, process development and client application development could both be performed on the same client node, or each could be performed on an engine server node that supports a windowing system. Deciding where these components are installed depends principally on who performs the various iIS development and system management tasks.
Also, the central server, which plays a unique role in an iIS system, can both host the central development repository and serve as an engine server node, supporting one or more iIS process engine components. Application servers in your iIS process system can also host iIS engine components. Choosing which components to install on which servers depends on the resources available on each server and the requirements of each component.
