Learning-Practice -Oracle 12C.pdf

8/10/2019 Learning-Practice -Oracle 12C.pdf

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Learning / Practise Oracle 12c

Introduction / Understanding Oracle 12C ..................................................................................................... 2

Building CDBs in one go ................................................................................................................................. 2Virtual Box Configuration .............................................................................................................................. 2

My Idea for Testing CDBs & PDBs .................................................................................................................. 3

Confirming the Installation: ........................................................................................................................... 3

Testing CDBs and PDBs .................................................................................................................................. 3

TNS Alias for PDB ........................................................................................................................................... 4

Connecting to Pluggable Database: .............................................................................................................. 4

Check Status of Pluggable Database ............................................................................................................. 5

local_listener ................................................................................................................................................. 6

Unplug and plug PDB: .................................................................................................................................... 6

Further Testing as explained on "oracle-base.com" and also my intentions ................................................ 7


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Introduction / Understanding Oracle 12C

Reading the Articles about Oracle 12C on oracle-base.com Website the Architecture of CDB and PDB was

clear and interesting. I think Oracle 12C has a lot to offer us.

The only picture or example unknowingly that came in my mind when I started reading about it therewas a "girl's hand bag" ! :-) I mean if the CDB Architecture confuses you or etc. then I think my example

could help you in some way.

Just imagine a CDB is like a girl's hand bag . We know girls do often change the hand bags unless like men

who carry the same wallet or bag round the year :-) Right? yes.

She would put the things in it that she needs. These things you can consider as PDBs. When she thinks of

to change her hand bag she will then take out all the necessary things from that bag and move it in to a

new hand bag.

So, the new hand bag is like a new CDB and the things that moved in to the new hand bag are like thePDBs plugged or PDBs unplugged. She knows what is required in the new bag and what's not. Like that,

we unplug and plug the PDBs between CDBs that we want.

A hand bag is always there open for the things. So, a CDB is always there up and running and the PDBs

can be made up and running or shutdown. No effect on CDB.

It is said, " practice makes a man perfect" and when I finally got time to test it I started doing it.

I think the database parameter "local_listener" should be considered important or at least checked.

Building CDBs in one go

The Section "Database Configuration Assistant (DBCA)" from the below link shows us the option

"Advanced Mode". Navigating from this Mode makes our job easier to create a CDB with multiple PDBs

in one go.http://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-

12cr1.php#configure-a-cdb

Virtual Box Configuration

The simplest procedure I had:

Server : Oracle Linux 6.4 (4GB RAM)

3 Partitions (/u01,/u02 and /u03)

/u01 - Oracle Home, /u02 - Data and also /u3 for Data
http://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php#configure-a-cdb


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My Idea for Testing CDBs & PDBs

Using GUI I installed 1st CDB with the option "Create and configure a database" and was named as

"world". This CDB had 3 PDBs called :

"INDPDB, DEPDB and USPDB " (IND->INDIA, DE->Germany and US->USA).

My idea was to create 2 more CDBs "ASCDB and EUCDB" (AS->ASIA and EU-> EUROPE). This way I tested

CDBs and PDBs following Naming Standards.

So I moved the respective PDBs (INDPDB and DEPDB) from the "world" CDB to Continent Names (Asia

and Europe i.e. ASCDB and EUCDB).

Confirming the Installation:

When I was finished with the installation I checked with :

1) Directories of CDBs and PDBs

(created a directory " 12c_data " to hold CDB related data files)

[oracle@ora-rac2 ]$ pwd

/u03/12c_data/world

[oracle@ora-rac2 world]$ ls

A directory with "DEPDB" was created by the Installer and data files of PDB were saved here.

It is interesting to compare the DBF Files in this "DEPDB" Directory and "WORLD" Directory.

2) LISTENER

$ lsnrctl status

$ lsnrctl service

3) ORATAB - to confirm the SID

$ more /etc/oratab

Testing CDBs and PDBs

Connect as SYS or SYSTEM (Use 'SYSTEM' If it has access to CDBs and PDBs)

$ SQLPLUS sys as sysdba


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Check Available Services:

SQL > COLUMN name FORMAT A30

SQL> SELECT name, pdb FROM v$services ORDER BY name;

SQL> SHOW CON_NAME

The output was exactly as informed on "oracle-base.com". It was " CDB$ROOT "

TNS Alias for PDB

Connecting Pluggable Database using TNS alias. I made an entry in TNSNAMES.ORA File by checking with

the command :

$ lsnrctl service

I already have a TNS Alias for my CDB "world". I just copied all the lines of this "world" TNS Alias and then

renamed "world" with "DEPDB" and gave a Service Name "DEPDB"

$ lsnrctl reload

$ SQLPLUS sys/password@world as sysdba

SQL > show con_name

CDB$ROOT

SQL> exit

Connecting to Pluggable Database:

$ SQLPLUS sys/password@depdb as sysdba

SQL > show con_name

DEPDB

Shutdown Pluggable Database:


SQL> shutdown immediate

Pluggable Database closed.

SQL> exit

$ SQLPLUS sys/password@world as sysdba

SQL > show con_name

CDB$ROOT

SQL > exit


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Check Status of Pluggable Database


SQL> select open_mode from v$database;

MOUNTED

SQL> startup

SQL > select open_mode from v$database;

READ WRITE


Pluggable Database close

2nd Pluggable Database INDPDB :

My Test Server has 4 GB of RAM so I shutdown the PDB "DEPDB" and create another PDB called

"INDPDB". We can create another Pluggable Database using DBCA as show here

http://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php

Followed the above link to create another PDB and named it as "INDPDB".

TNS NAME for INDPDB:

The next step I performed was an entry in the TNSNAMES.ORA File for this new PDB. Finally reloaded

with the command:

$ lsnrctl reload

Connecting "INDPDB" using TNS Alias:

$ SQLPLUS sys/password@indpdb as sysdba

SQL > select open_mode from v$database;

READ WRITE



3rd Pluggable Database USPDB :

I shut down this "INDPDB" PDB and created another PDB called "USPDB". The next step I performed was

an entry in the TNSNAMES.ORA File for this new PDB. Finally reloaded with the command:

$ lsnrctl reload
http://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.phphttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.phphttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php


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Connecting "USPDB" using TNS Alias:

$ SQLPLUS sys/bachu77@uspdb as sysdba

SQL> select open_mode from v$database;

READ WRITE



Creating another CDB "EUCDB":

$ dbca

I followed the below link to create another CDB "EUCDB". I didn't use the "Advanced Mode" option.

http://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php

Clicked on " Database Configuration Assistant "

Care has to be taken during the Installation esp. when the Screen with "Listener Configuration" comes

up.

local_listener

After the installation I checked the parameter " local_listener ". If it has not a value I made sure it has a

value.

SQL> show parameter local_listener

SQL> alter system set local_listener ='(ADDRESS = (PROTOCOL=TCP) (HOST=hostname)

(PORT=port_number) )' scope=both;

http://edstevensdba.wordpress.com/2011/07/30/exploring-the-local_listener-parameter/


Unplug and plug PDB:

I followed the below 2 sections

o Unplug a Pluggable Database (PDB) using the DBCA

o Plugin a Pluggable Database (PDB) using the DBCA
http://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.phphttp://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.phphttp://edstevensdba.wordpress.com/2011/07/30/exploring-the-local_listener-parameter/http://edstevensdba.wordpress.com/2011/07/30/exploring-the-local_listener-parameter/http://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://edstevensdba.wordpress.com/2011/07/30/exploring-the-local_listener-parameter/http://oracle-base.com/articles/12c/multitenant-create-and-configure-container-database-12cr1.php


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Using the below link to unplug "DEPDB" from "World" CDB and plug "DEPDB" to the CDB "EUCDB".

http://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php

When the screen "Unplug Pluggable Database" came up I gave the Path "/u03/12c_data/" in the

"Pluggable Database Archive Location" so that it saved in the location where I want and easy to

remember.

$ export ORACLE_SID=world

$ SQLPLUS sys as sysdba

SQL> startup

$ dbca

o Unplug a Pluggable Database (PDB) using the DBCA


$ export ORACLE_SID=eucdb

$ dbca

o Plugin a Pluggable Database (PDB) using the DBCA

o

Further Testing as explained on "oracle-base.com" and also my intentions

1) Creating Data Base Files in PDBs

2) Managing Users that is giving access to Users to a certain PDB and/or all the PDBs in CDBs

3) Data Guard Scenarios

4) RMAN Backup of PDBs etc.
http://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.phphttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.phphttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-plugin-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php#dbca-unplug-pdbhttp://oracle-base.com/articles/12c/multitenant-create-and-configure-pluggable-database-12cr1.php

Learning-Practice -Oracle 12C.pdf

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