You want to change the location of the database to a different server/port/URL/DBMS/etc.
FusionAnalytics is made up of two main server-side components – the DataCollector and DataServices. The DataCollector deals with importing and quantizing data. The DataServices deals with running reports and serving data to the UI clients.
Currently, the two server-side elements manage their DB connection configuration independently. Therefore, there are two configuration updates to make when the DB connection details change.