Performing Oracle Advanced Recovery - OCP: Oracle Database 12c Administrator Certified Professional - page 287

FiGURe 7.1 Example of an Oracle incarnation

D
Generate redo for
new incarnation

C
Restore database
to 25000 and then
open resetlogs

B
Restore
database

A
Database crashes

SCN
10000

SCN
20000

SCN
25000

SCN
30000

SCN
40000

Overview of RMAN Database Duplication

One frequent use of RMAN is to duplicate an existing database. Database duplication can be
used for a number of different purposes, such as creating development and test databases from
production databases or creating a database to test upgrades. In the following sections, we
will discuss RMAN duplication basics. Then we will cover how to use the RMAN DUPLICATE
DATABASE command to duplicate a database. We will first look at how to prepare to duplicate
the database. We will then walk you through actually duplicating the database, and finally we
will discuss things to do afterward.

RMAN Database Duplication Basics

The host from which the database is being duplicated is the source host . The host to which
the database is being duplicated is the destination host . The source host and destination
host can be the same computer or a different computer, depending on your needs. One
requirement is that the source and destination host must be on the same platform. The tar-
get or source database is the database that you will be duplicating from. You will be dupli-
cating to a database instance that will be associated with the new database. This instance
is called the auxiliary instance .