Data Transformation Engine Integration Flow Designer Reference Guide

Chapter 4 - How the Integration Flow Designer Works Theory of Operation

Integration Flow Designer Reference Guide

You can use a Command Server to execute one map or multiple maps. A

Command Server executes multiple maps in a single-threaded sequential fashion,

a scheme that is sufficient for many applications. A Command Server expects all

the sources of a map to exist when the map is executed.

Note For more information about Command Servers, refer to the Command Server

Reference Guide.

Event Servers

The IFD is the tool you use to create and generate systems for the Event Server to

run. An Event Server executes maps based on a sophisticated event-driven model.

Maps are launched only when specific events occur and only when required

resources to run the map are available. You can specify event triggers, source and

target resources, and other settings for a map from the IFD.

For example, the Event Server for Windows NT is a service that runs maps in a

multi-threaded fashion. The Event Server is started and allowed to run

continuously to monitor events and run maps accordingly.

Note For more information about the Event Server, refer to the Event Server Reference

Guide.

Map Component Execution Settings

You maintain the execution settings for map components by using the IFD. These

settings are eventually embedded into the process control information, which

drives the corresponding Command or Event Server. Some execution settings that

you specify are used by both Event and Command Servers at execution time,

including:

♦ The location of the map on the server to be executed

♦ The source settings for input data

♦ The target settings for output data

♦ The same map settings available in the Map Designer

♦ Retry options that apply if resources (such as work files or log files) that the

map requires to execute are in use. Each source and target of the map also has

retry options