For Servoy 8 and higher the Clustering below is deprecated and can't be used anymore.
For 8.2(.1) there is a different solution for scaling of server by the use of an AMQP server like RabbitMQ by the use of Broadcasting databroadcast the Load balancer secton is still applicable
In order to serve large number of users, multiple Servoy Application Servers can be clustered to works like one massive server.
To have an even user load among the servers in cluster, a load balancer is needed.
Multiple server in a cluster also provide failover if one of the servers fails.