Servoy 2020 Documentation
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The load-balancing is done by serving the JNLP file from different servers when the Apache HTTP front-end is accessed. Add to each of the Servoy Application Server's "servoy.properties" files the following line (needed for Smart Client load balancing):

servoy.jnlpCodebaseOverride=http://thisServersHostnameAsSeenByClients:port
What you should also take into consideration when setting up a load-balanced cluster, is allowing smart-clients to connect directly to individual servers in the cluster. This means that all Servoy Application Servers should be accessible from the client side - and you might want to isolate the cluster so that connections to ports used by Terracotta (see tc-config.xml) are only allowed from within the cluster, even if connections from client machines on Servoy ports should be allowed to all Servoy Application Servers.

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3. Using Apache HTTP Server for load-balancing

Using Apache HTTP server as a front-end to load-balance a cluster of Servoy Application Servers is optional. You should be able to do this in other ways, including custom balancing inside a Tomcat instance application or using other HTTP servers such as IIS that support (or have modules for) AJP1.3. Read through the section even if you do not plan to use Apache HTTP Server as it also shows configuration changes needed for Servoy Application Servers to run in a similar setup.

Smart clients will connect directly to the individual Servoy Application Servers in the cluster. The load-balancing is done by serving the JNLP file from different servers when the Apache HTTP front-end is accessed. Add to each of the Servoy Application Server's "servoy.properties" files the following line (needed for Smart Client load balancing):

servoy.jnlpCodebaseOverride=http://thisServersHostnameAsSeenByClients:port

What you should also take into consideration when setting up a load-balanced cluster, is allowing smart-clients to connect directly to individual servers in the cluster. This means that all Servoy Application Servers should be accessible from the client side - and you might want to isolate the cluster so that connections to ports used by Terracotta (see tc-config.xml) are only allowed from within the cluster, even if connections from client machines on Servoy ports should be allowed to all Servoy Application Servers.

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