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<https://docs.google.com/viewer?url=http%3A%2F%2Fwww.oracle.com%2Ftechnology%2Fdeploy%2Favailability%2Fpdf%2FMAA_WP_10gR2_TransientLogicalRollingUpgrade.pdf> -- Karl Arao karlarao.wordpress.com karlarao.tiddlyspot.com