The 4D server was developed as the only application to run on a computer (dedicated server). Only that way the highest stability and performance can be ensured. In some cases it is better to start the server a second time in order to be able to operate a second application. In practice this “good conscience” can be recommended only with Windows 7 / 2008 R2 servers, since these systems offer multitasking and storage protection. On all other operating systems, neither the integrity of the RAM nor sufficient computing performance are ensured. If two 4D servers run on a machine then the use of two processors makes more sense.
The 4D Server – 4D Client Communication with TCP/IP
During communication with TCP/IP between the client and servers, the “Ports” also always come into play. The standard port number used during communication between the 4D server and the 4D client is:
Port 19813
In order to be able to use TCP/IP communication, the TCP configuration must be correctly installed on the respective computer. This means a distinct IP number and sub-network screen, for example:
4D Server: 192.168.10.10
4D Client 1: 192.168.10.11
4D Client 2: 192.168.10.12
Sub-network: 255.255.255.0
Example of a configuration with two 4D servers for TCP/IP operation
It is possible to change the port number directly in the settings of the 4D server.
This information is stored in the structure file of the database and on each client computer. The 4D server and 4D client use the standard port number 19813. When you change this value on the 4D server or the 4D client, it will be automatically transferred to all 4D client computers that are registered on the database. Other off-line computers will update when you enter the new port number during the next registration in the connection dialogue on the side adapted. This will be attached to the IP address of the server computer separately by colon.
Accessibility: expanded log on dialog
Result: The client is configured as such that you can log on to both servers. When starting the 4D client a second time, you will find the manually-setup 4D server in your favorites.