If you are planning to upgrade from Oracle8i to 10g, there is another solution and that is to install Oracle 10g (if your platform allows it -- be sure to review the Oracle certification matrix), upgrade the 8i database to 10g in place and then use transportable tablespaces to transfer the database to the AIX server. Note that you would also need to install Oracle 10g on the AIX server. To learn more about how to use transportable tablespaces in Oracle 10g, review the Oracle Database 10g Release 2 Administrator's Guide.
Dig Deeper on Oracle database export, import and migration
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