notes/tiddlywiki/PDB clone examples.md

Clone PDB from a remote CDB using RMAN "from active database"
-------------------------------------------------------------

On target CDB, set the source CDB archivelog location:

	alter system set REMOTE_RECOVERY_FILE_DEST='/fra' scope=MEMORY sid='*';

Run RMAN duplicate command:

	rman target='sys/"*****"@taris/ASTYPRD' auxiliary='sys/"*****"@mandalore/ELLOPRD'

	run
	{
	  allocate auxiliary channel aux01 device type disk;
	  allocate auxiliary channel aux02 device type disk;
	  allocate auxiliary channel aux03 device type disk;
	  allocate auxiliary channel aux04 device type disk;
	  allocate auxiliary channel aux05 device type disk;
	  allocate auxiliary channel aux06 device type disk;
	  allocate auxiliary channel aux07 device type disk;
	  allocate auxiliary channel aux08 device type disk;
	  allocate auxiliary channel aux09 device type disk;
	  allocate auxiliary channel aux10 device type disk;
	  duplicate pluggable database WEDGEPRD as ANTILLESPRD
	    from active database using compressed backupset section size 400M;
	}


Clone PDB from a remote CDB through a database link
---------------------------------------------------

On source CDB create an user to be use by the database link:

	create user c##adminpdb identified by adminpdb container=ALL;
	grant create session, create pluggable database to c##adminpdb container=all;


On target CDB create the database link and clone the remote PDB.

	create database link ASTYPRD connect to c##adminpdb  identified by "adminpdb" using 'taris/ASTYPRD';
	select * from dual@ASTYPRD;

	create pluggable database ANTILLESPRD from WEDGEPRD@ASTYPRD parallel 10;
	alter pluggable database ANTILLESPRD open;


> Note that in both method we can choose the parallelism degree.


Clone PDB from a remote CDB using a RMAN backup
-----------------------------------------------

Beacause in Oracle 21c is is still not possible to duplicate a pluggable database directly from a backup (aka *duplicate backup location*), wi will perform this operation in 2 steps:
1. duplicate from location the *root* PDB + source PDB into an auxiliary CDB
2. unplug the PDB from auxiliary CDB and plug it on target PDB


> A *set until time* clause can be specified in duplicate command.

Start AUXCDB CDB instance using a basic spfile, therefore run the duplicate command:

	rman auxiliary /

	run
	{
	  allocate auxiliary channel aux01 device type disk;
	  allocate auxiliary channel aux02 device type disk;
	  allocate auxiliary channel aux03 device type disk;
	  allocate auxiliary channel aux04 device type disk;
	  allocate auxiliary channel aux05 device type disk;
	  allocate auxiliary channel aux06 device type disk;
	  allocate auxiliary channel aux07 device type disk;
	  allocate auxiliary channel aux08 device type disk;
	  allocate auxiliary channel aux09 device type disk;
	  allocate auxiliary channel aux10 device type disk;
	  set until time "TIMESTAMP'2021-11-08 15:40:00'";
     duplicate database to AUXCDB
       pluggable database WEDGEPRD,root
       backup location '/mnt/yavin4/tmp/_oracle_/orabackup/ASTY';
	}


Unplug PDB from auxiliary CDB:

	alter pluggable database WEDGEPRD close immediate;
	alter pluggable database WEDGEPRD open read only;


	alter session set container=WEDGEPRD;
	exec DBMS_PDB.DESCRIBE('/mnt/yavin4/tmp/_oracle_/tmp/WEDGE.xml');
	alter pluggable database WEDGEPRD close immediate;


Plug in PDB on target CDB (with copy, move or nocopy option):

	create pluggable database ANTILLESPRD using '/mnt/yavin4/tmp/_oracle_/tmp/WEDGE.xml' move;
	alter pluggable database ANTILLESPRD open;
	alter pluggable database ANTILLESPRD save state;


At this momment we can destroy auxiliary CDB.