I need to set up replication between two Oracle 8.0 databases.

We need to have one master and the replica server will be used as a failover server in case the master one goes down. The users need only access the master one.. and be switched to the replica one in case of emmergency.
Can anyone tell me how can this be accomplished? what type or replcation do I need to implement? how to I transfer all th info in the master database to the replica one (is emp/exp the way)?
Please if you can help me, drop m e an email rickym1@hotmail.com

Thanks in advance
-R