Hello, Currently we have 32 bit linux and 32 bit Oracle 9i. My idea is to move to 64 bit in the following way: - install 32 bit Oracle software on 64 bit linux - install 64 bit Oracle software on 64 bit linux - setup standby of production using the 32 bit Oracle software on the 64 bit server - switch to this standby - shutdown, reopen with 64 bit and upgrade on the stop Do you guys know if I can have a standby of a 32 bit Oracle database on a 64 bit server running 32 bit software ? -- Christo Kutrovsky Database/System Administrator The Pythian Group -- //www.freelists.org/webpage/oracle-l