9.3. Many Data Server computers to One Windows computer
There are two different options for connecting more than one data server to one Windows computer. The first option is available for QNX 4, QNX 6, and Linux. The second option uses QNX message passing over a network, which is only available for QNX 4 at present.
9.3.1. For QNX 4, QNX 6, and Linux
This option is essentially a single version of the Many to Many option in the next section. Here, each Cascade Connect on the single Windows computer connects to one Connect Server on each data server.
Connecting more than one data server computer with one Windows computer can be accomplished using:
1 copy of the Connect Server on each data server.
1 copy of Cascade Connect on the Windows computer for each copy of the Connect Server.
1 copy of the Cascade DataHub on each data server is recommended. (See When to use the Cascade DataHub.)
The scenario illustrated above would require three Cascade Connect licenses and three Cascade DataHub licenses.
9.3.2. Only for QNX 4
Connecting more than one data server computer running QNX 4 with one Windows computer can also be done by configuring one of the data servers with one Cascade DataHub and having the other data servers exchange their process data with the datahub using QNX message passing over the network. If, however, you are concerned about having a single point of failure in the system, you may want to consider the other option (above).
This connection can be accomplished using:
1 copy of the Connect Server on one data server.
1 copy of Cascade Connect on the Windows computer.
1 copy of the Cascade DataHub on the same data server is useful. (See When to use the Cascade DataHub.)
The scenario illustrated above would require one Cascade Connect license and one Cascade DataHub license.