Thank you very much Karl. Looks like the link in your site is also broken: http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10gR2_TransientLogicalRollingUpgrade.pdf is redirected to http://www.oracle.com/technetwork/index.html. Looks like Oracle had rearranged the documents on OTN, breaking all the references... From: karlarao@xxxxxxxxx Date: Wed, 1 Sep 2010 13:32:29 +0800 Subject: Re: Oracle upgrade without downtime?? To: nupendra@xxxxxxxxxxx CC: a.piesk@xxxxxxx; oracle-l@xxxxxxxxxxxxx Hi Upendra, I also got links for that http://karlarao.tiddlyspot.com/#RollingUpgrades Oracle GoldenGate Tutorial 10- performing a zero downtime cross platform migration and 11g database upgrade http://gavinsoorma.wordpress.com/2010/03/08/oracle-goldengate-tutorial-10-performing-a-zero-downtime-cross-platform-migration-and-11g-database-upgrade/ MAA - TransientLogicalRollingUpgrade http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10gR2_TransientLogicalRollingUpgrade.pdf -- Karl Arao karlarao.wordpress.com karlarao.tiddlyspot.com