Hi Thank you for reading my post , I have to build an application for managing ADs something like phpAdnew which is a php+mysql application The problem is that server just support sql server and Mysql , so i have to choose between them or use an embeded database I did some investigation about Derby but now i want to see what other alternatives I have ? Daffodil DB , CloudScape , .. what other choice i have whether in commerical or Opensource? It should be able to handle about 20 TransAction (each may have 2update + 2 insert)per second. what other pure java database is avaialable in market ? embeded or NEtwork server. Thank you.