What is the efficient way to migrate the large DB (over 1TB) from 9i to 11g

Can any body give a suggestion for migrate the large DB (Over 1TB) from 9i to 11g?

Hi;
Can any body give a suggestion for migrate the large DB (Over 1TB) from 9i to 11g?Please check below
Minimizing Downtime During Production Upgrade [ID 478308.1]
Master Note For Oracle Database Upgrades and Migrations [ID 1152016.1]
Different Upgrade Methods For Upgrading Your Database [ID 419550.1]
I suggest also Please check my blog
http://heliosguneserol.wordpress.com/2010/06/17/move-to-oracle-database-11g-release-2-wiht-mike-dietrich/
In this pdf you can see patch of to upgrade db from x to n wiht many senerios wiht all related metalinks notes which is created by Oracle worker Mike Dietrich
Regard
Helios

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What is the efficient way to migrate the large DB (over 1TB) from 9i to 11g

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