Hi All, We have several Oracle databases with different versions i.e. Oracle 7.3.4, Oracle 8i and Oracle 9i. We need to keep data in sync between these databases. One way of achieving this is to use Oracle Replication. I need to find the answers to the following questions. Venders One-Way (Basic) Two-Way (Advance) Hardware / Software / Bandwidth Performance (# of trans, time, network traffic etc.) Issues (performance, installation, admin, maintenance, interoperability etc.) Interoperability Pros/Cons Oracle Replication 7.x - 9i Oracle Replication 7.x - 8.x Oracle Replication 8.x - 9i Does someone have any experience going through same situation? Can anyone direct me to the right source of information? Your help will be immensely appreciated. Thanks Raj --------------------------------- Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. -- //www.freelists.org/webpage/oracle-l