For the fastest start with dRS please work through the tutorial, available in different formats in the following folder:
./docs/
Then you can look at an example replication in ./QuickStart project.
Introductory online documentation is available at:
http://developer.db4o.com/Resources/view.aspx/Reference/Db4o_Replication_System_dRS
The software contained in this distribution is the open source db4o Replication System library "dRS" supplied by:
        Versant Inc.
        
        1900 South Norfolk Street
        
        Suite 350
        
        San Mateo, CA, 94403
        
        USA
    
        Make sure that you have downloaded the latest version from the db4objects website:
        
            
            http://developer.db4o.com/files/
        db4o Replication System may be used under the GNU General Public License, GPL.
        
        You should have received a copy of the GPL with the download.
    
Your db4objects team.