PLUGGABLE DATABASE HOT CLONE REFRESH MANUAL

Author     : Cihan Gedik

Email        : cihangedik@gmail.com

Linkedin  : https://www.linkedin.com/in/cihan-gedik-13b55065/

Group      : https://www.linkedin.com/groups/13792740/

 

PLUGGABLE DATABASE HOT CLONE REFRESH MANUAL

Compatible Versions

Oracle Database 12.1.x and Later

 

Requirements

One Source PDB in CDB

One Empty CDB for Target

 

In this post ;

Database Version : 19C

PDB01 is my source pluggable database in CDB01

PDB01_HOT_MAN is my target clone pluggable database in CDB02

Solution

For this LAB Please create below requirements

Create PDB01 in CDB01 and insert some data

Create Empty CDB02 Database

#### Create CDB01

$ORACLE_HOME/bin/dbca -silent -createDatabase -templateName General_Purpose.dbc -gdbname CDB01 -sid CDB02 -createAsContainerDatabase true -numberofPDBs 0 -useLocalUndoForPDBS true -responseFile NO_VALUE -totalMemory 1800 -sysPassword welcome1 -systemPassword welcome1 -pdbAdminPassword welcome1 -enableArchive true -recoveryAreaDestination /u01/app/oracle/databases/recovery_area/CDB01 -recoveryAreaSize 1500 -datafileDestination /u01/app/oracle/databases/datafiles/CDB01

#### Create PDB01 and Insert Some Data

create pluggable database PDB01 admin user adminpdb01 identified by welcome1 roles=(CONNECT) CREATE_FILE_DEST='/u01/app/oracle/databases/datafiles/PDB01';

alter pluggable database PDB01 open;

#### Generate Data via Toad

Create some tables as you wish and use toad to insert data

Toad > Administrator > Import Data > Generate Data

sqlplus as sysdba

connect sys@PDB01 as sysdba

Enter password:

### Grant Create PDB Privilege to the user which you will use.. I used system in lab

grant create pluggable database to system;

Grant succeeded.

Note : Until this point you should have PDB01 in CDB01 Database with some data populated into tables

sqlplus system/welcome1 as sysdba

alter session set container=PDB01;

select count(*) from scott.DEPT;


COUNT(*)

----------

12000



select count(*) from scott.emp;

COUNT(*)

----------

12000

#### Create CDB02 with no PDB

$ORACLE_HOME/bin/dbca -silent -createDatabase -templateName General_Purpose.dbc -gdbname CDB02 -sid CDB02 -createAsContainerDatabase true -numberofPDBs 0 -useLocalUndoForPDBS true -responseFile NO_VALUE -totalMemory 1800 -sysPassword welcome1 -systemPassword welcome1 -pdbAdminPassword welcome1 -enableArchive true -recoveryAreaDestination /u01/app/oracle/databases/recovery_area/CDB02 -recoveryAreaSize 1500 -datafileDestination /u01/app/oracle/databases/datafiles/CDB02

 

sqlplus system/welcome1 as sysdba

select instance_name from v$instance;


INSTANCE_NAME

----------------

CDB02

 

Create DB Link

Syntax : create pluggable database <NEW PDB NAME> from <SOURCEPDBNAMETOCLONE>@<DBLINKONTARGETTOSOURCE> refresh mode manual;

alter session set db_create_file_dest='/u01/app/oracle/databases/datafiles/CDB02/PDB01_HOT_MAN';

create pluggable database PDB01_HOT_MAN from PDB01@PDB_SOURCE_FOR_HOT_CLONE refresh mode manual;

Pluggable database created.


SQL>show pdbs

CON_ID CON_NAME                       OPEN MODE  RESTRICTED
--------- ------------------------------ ---------- ----------
2 PDB$SEED                       READ ONLY  NO
3 PDB01_HOT_MAN                  MOUNTED


alter pluggable database PDB01_HOT_MAN open read only;
alter session set container=PDB01_HOT_MAN;


Session altered.

SQL> show con_name

CON_NAME
------------------------------
PDB01_HOT_MAN

col owner format a7
col object_name format a15
select owner,object_name from dba_objects where owner='SCOTT';SQL> SQL>


OWNER   OBJECT_NAME

------- ---------------

SCOTT   DEPT

SCOTT   EMP

SCOTT   EMP_BACKUP

SCOTT   DEPT_BACKUP

#### AFTER CLONE COUNT SIZE ###NOTE THAT HOT CLONE PDB STILL READ ONLY

 

select count(*) from scott.DEPT;

COUNT(*)

----------

12000


select count(*) from scott.emp;

COUNT(*)

----------

12000

 

### Insert New Rows into PDB01 in CDB01 Source

 

######WE WILL REFRESH PDB01_HOT_MAN and Check new 2000 Rows Updated ?

sqlplus system/welcome1 as sysdba
select instance_name from v$instance;


INSTANCE_NAME
----------------
CDB02


SQL> show pdbs

CON_ID CON_NAME                       OPEN MODE  RESTRICTED

------ ------------------------------ ---------- ----------

2 PDB$SEED                       READ ONLY  NO
3 PDB01_HOT_MAN         READ ONLY  NO


alter pluggable database PDB01_HOT_MAN close;
alter pluggable database PDB01_HOT_MAN refresh;
alter pluggable database PDB01_HOT_MAN open read only;
alter session set container=PDB01_HOT_MAN;


select count(*) from scott.DEPT;


COUNT(*)
----------
14000



select count(*) from scott.DEPT;


COUNT(*)
----------
14000

 419 views last month,  9 views today