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Migration
There are two phases in
migrating an Oracle
Instance. In the first phase it creates an empty instance from an
existing instance, copying only the database structure but no
data. This exactly creates a copy of the original instance
with same tablespaces and sized data files. In the second
phase it copies the actual data from source instance to target
instance via import and export.
An empty
database can also be created i.e. creating
only the database structure, but not importing the data. Migration can
also be performed across multiple operating systems (HP-UX/SUN-Solaris/IBM-AIX)
and multiple Oracle versions (Oracle 7.x, 8.x, 9.x).
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