Configuration migrations
Configuration migrations involve synchronizing configuration parameters between existing instances of the same version.
For example; when you want to have a development version to test user interface changes without affecting the main instance. After testing, you migrate those changes to production.
In some cases, more than one instance may be required on the primary server. When multiple instances are maintained, there are often configuration parameters that are common to all instances. When a configuration change to all instances is required, it is necessary to migrate the configuration parameter change from one instance to all other instances.