Sanjay, This configuration is not possible. The logical standby must reside on the same os as the primary database. You can however setup Oracle Streams to replicate tables/schemas from the AIX db to the linux db, but this is not the same as a logical standby. Regards, Freek D'Hooge Uptime Oracle Database Administrator email: freek.dhooge@xxxxxxxxx tel +32(0)3 451 23 82 http://www.uptime.be disclaimer: http://www.uptime.be/disclaimer.html ________________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Sanjay Mishra Sent: dinsdag 20 oktober 2009 18:35 To: oracle-l@xxxxxxxxxxxxx Subject: Hetergenous Dataguard Hi Is it correct to say that I can have Datagaurd where Primary is AIX and Dataguard (Logical) is Linux. Is this Correct to say that Physical Standby is not possible but Logical Standby is possible. Any caveat. TIA Sanjay -- //www.freelists.org/webpage/oracle-l