I understand that. But if I delete that tag then the DS will come under java:/ local namespace. - If it is local then can servlets on other servers access it? What if it is a clustered environment? - If that tag is present then I can access the DS using java:/jdbc/MySqlDS, not using java:/comp/env/jdbc/MySqlDS. So I guess my question now is what is the actual difference between those namespaces? - Are these the only files I need to modify to make the DS available? Thanks for your help, wmprice! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961684#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...