I am planning to create many local copies for my below project(signature) and am looking to keep the backend shared between all copies such as Yahoo email. I'll try to make myself clearer: If users in France search for a web site in their local skillipedia web directory, they will be able to see search results from all the rest of web site copies all over the world . Do I need specific hardware, software or SQL server? My project runs on Jboss +Mysql