Hi, I have just implemented Multimaster Replication and the following link for that helped me a lot to proceed step by step for MM Replication. http://www.oracle-base.com/articles/8i/AdvancedReplication.php I want to implement RAC. Only thing I know is that it is based on having multiple instances on different machine with sharing a same set of physical files. lastly I have implemented Standby Databases with Dataguard. Can anyone have a good document for How to implement RAC? I am unable to find a good one on net n thats why asking you guys if someone has some good document. Any inputs are appreciated. Regards - Chirag ... ///