Modeling the network involves creating logical links among the network computers to satisfy your data transport requirements. By default, when DTS is installed, it assumes that all computers are connected directly to one another. So, your first task is to model the network to satisfy your logical requirements.
Consider the sample scenario. By default, as far as Data Transport is concerned, the central server has a direct connection to all of the end systems. However, if you instruct DTS to transfer the data file from the central server to all of the end systems, by default, it would carry out a fanout transfer. The optimization engine realizes the source data file for all of the transfers is identical, so it only needs to read the data once.
Using DTS, you can carry out some simple network configuration (build a model of your Data Transport network), and tweak some object properties to let DTS take advantage of some of its advanced transfer technology. You can model our Data Transport network requirements using WorldView.
You want to stop DTS from transferring data directly from the central server to the end systems and instead transfer it through the department servers. Thus, you must hardwire a route from the central server through the department servers to the end systems. You can do this by adding Data Transport links to the network model.
First, create three links among the central server and each of the department servers. Then create three Data Transport machine container objects, one for each LAN. Place all computers that connect to the LANs (except the department servers) in their respective containers.
Next, you must create links from each of the departmental servers to their appropriate machine container object. Lastly, you want to make DTS take advantage of the point-to-many transfer mechanism when it transmits the data from the department servers out to the end systems on the local LANs; and since you are transmitting to computers connected to the same IP subnet, DTS uses the Broadcast (BCAST) protocol.
With DTS there are many ways to achieve the same result. However, it is easier to set the point-to-many protocol property of the department server to container link to BCAST and set the point-to-many network address to the broadcast address appropriate to the subnet. You can do this in WorldView, by right-clicking the link and selecting Open DTS Details from the context menu.
Choosing Open DTS Details lets you modify the following properties:
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