Creo Options Modeler > References > Data Management > Managing Servers > About the Primary Server
  
About the Primary Server
The Creo applications are designed to use multiple data servers of different types. Typically you will work with one server that will become the default location for most storage and retrieval actions. A Creo application allows you to identify this server as a primary server and provides you with enhanced access. The advantages of having a primary server are:
Direct save of Creo files to the primary servers active workspace.
When retrieving an object, the Creo application always looks in the active workspace on the primary to retrieve first.
When saving an object, the Creo application always looks in the active workspace on the primary server first.
From the Creo file menu, you have direct access to check out, check in, undo check out, upload, and update functions.
The ability to check out objects on-the-fly.
After you register a primary server, any other server that you register is considered as secondary server. The Creo user interface does not provide direct access to database actions, instead for you must store objects to the active workspace and use the workspace controls for database actions.