Some bean property values will usually need to be changed when a development/testing configuration is deployed to a different environment such as production, which is typically achieved by ensuring that all such bean property values are specified using ${varname} substitution variables specified in .properties files for test versus production environments. For example, for some distributed memory stores the clusterName should be changed so that the nodes cannot talk to each other (although Apama also recommends production nodes to be located on a different network to reduce the chance of accidental errors). For more details on using substitution variables to specify configuration properties, see Substitution variables.