Multiple Servoy Application Servers instances can be clustered together to act as 1 virtual Servoy Application Server.
Using clustering, the load of many clients can be distributed of multiple physical servers.
Servoy's clustering is based on Terracotta, an open source framework.
If your Servoy Application Server's performance is starting to degrade due to heavy workload and a large number of connected clients you might consider setting up a cluster of servers to run your solutions.
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