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See Running Multiple Servoy Application Servers On The on the Same Machine for the standard steps to take when running multiple Servoy Application Servers on one machine.
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{servoyInstall}/application_server/terracotta
: provide an unique node name for each server by adding "-Dtc.node-name=xxxxx" after "-Dtc.config=terracotta\tc-config.xml" (replace xxxxx by the unique name){servoyInstall}/application_server/terracotta
: change the line "<logs>%(user.home)/terracotta/client-logs</logs>" to "<logs>%(user.home)/terracotta/client-logs/%(tc.node-name)</logs>"