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LESSON 27
How to clone a pluggable database (PDB) from one container database to
another or itself
Assumptions:
Container databases:
MYCDBX " From container we clone a pluggable database
MYCDBY " To container we clone a pluggable database
Pluggable database:
MYPDB1 " the pluggable database from the MYCDBX container
MYPDB1_CLONE " a pluggable database we clone to MYCDBY container
MYCDBX container
MYPDB1 pluggable database --> cloning and name it MYYPDB1_CLONE in
MYCDBY container
Steps:
Step #1:
Change the MYPDB1 pluggable database to READ ONLY mode.
First you need to close the pluggable database then you open it with the
READ ONLY mode.
SQL> connect / as sysdba
SQL> ALTER PLUGGABLE DATABASE mypdb1 CLOSE IMMEDIATE;
SQL> ALTER PLUGGABLE DATABASE mypdb1 OPEN READ ONLY;
Step #2:
Go to other server and define space for your new cloned pluggable
database. Then set default destination to the created directory.
# cd /oradata
# cd MYPDBY
# pwd
/oradata/MYPDBY
# mkdir mypdb1_clone
Login to SQLPLUS to set your destination.
SQL> ALTER SYSTEM SET db_create_file_dest="/oradata/MYPDBY/mypdb1_clone";
Step #3:
Create your clone.
SQL> CREATE PLUGGABLE DATABASE mypdb1_clone FROM
mypdb1@mycdbx;
Open it.
SQL> ALTER PLUGGABLE DATABASE mypdb1_clone OPEN;
Connect to it by using service name or use direct string connection.
SQL> connect system/mypass@myserver:1521/mycdb1_clone;
Check it.
SQL> show con_name
SQL> select name from v$services;
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Change the source pluggable database from READ ONLY to READ WRITE
mode.
SQL> connect / as sysdba
or
SQL> ALTER SESSION SET container=cdb$root;
SQL> ALTER PLUGGABLE DATABASE mypdb1 CLOSE IMMEDIATE;
SQL> ALTER PLUGGBALE DATABASE mypdb1 OPEN;
To drop your clone:
SQL> connect / as sysdba
SQL> ALTER PLUGGABLE DATABASE mypdb1_clone CLOSE IMMEDIATE;
SQL> DROP PLUGGABLE DATABASE mypdb1_clone INCLUDING DATAFILES;
Good Luck! |