This document provides an overview of Oracle 12c and its pluggable database feature from a presentation by Gustavo René Antúnez, an Oracle DBA at Pythian. It discusses the benefits of pluggable databases such as greater scalability and consolidation. It also covers key aspects of the multitenant architecture like common users, local users, and views that span the container and pluggable databases. The presentation concludes with a demonstration of RMAN backups in a multitenant environment.

1. Oracle 12c and its pluggable
databases
Presented by : Gustavo René Antúnez
Oracle DBA
The Pythian Group
February, 2014

2. About Pythian
•
Recognized Leader:
– Global industry-leader in remote database administration services and
consulting for Oracle, Oracle Applications, MySQL and Microsoft SQL Server
– Work with over 250 multinational companies such as Forbes.com, Fox Sports,
Nordion and Western Union to help manage their complex IT deployments
•
Expertise:
– One of the world’s largest concentrations of dedicated, full-time DBA
expertise. Employ 9 Oracle ACEs/ACE Directors.
– Hold 7 Specializations under Oracle Platinum Partner program, including
Oracle Exadata, Oracle GoldenGate & Oracle RAC
•
Global Reach & Scalability:
– Around the clock global remote support for DBA and consulting, systems
administration, special projects or emergency response

3. About Me
– Oracle DBA
• Started with Version 9.2 in 2004
– With The Pythian Group for the
last year
– Movie Fanatic
– Music Lover
– Bringing the best from México
(Mexihtli) to the rest of the world
and in the process
photographing it :)
– reneantunez.com
– @antunezrene

4. Where do I come from?

5. How did you get to be a DBA

6. What is The Multitenant
Architecture?
• Container database (CDB) is an Oracle
database that includes zero, one, or many
customer-created Containers or Pluggable
Databases.
• A pluggable Database (PDB) is a user-created
container holding the data and code for your
specific applications

7. What is a Pluggable Database?
CDB
PDB
Administrator
for hrpdb
Root
(CDB$ROOT)
CDB
Administrator
hrpdb
PDB
Administrator
for salespdb
salespdb
Seed
(PDB$SEED)
Sales Application
HR Application
Logical
Physical
Database
Data
Files
10101
Control
Files
10101
Online
Redo Log
Archived
Redo Log
Flashback
Log

8. Benefits of a Pluggable Database
• Achieve a greater level of scalability and
consolidation density
• Managing many databases as one
• Single set of Background Processes
• Oracle System dictionary resides in the
Container Database.
• Rapid Provisioning and Cloning

9. What is a Pluggable Database?
CDB
CREATE PLUGGABLE DATABASE
Root
(CDB$ROOT)
Seed
(PDB$SEED)
HR
PDB
Sales
PDB
New
PDB
Sales
PDB2
CREATE PLUGGABLE DATABASE. . . FROM

10. Multitenant Architecture
CDB_view : All of the objects in the CDB across all PDBs.
DBA_view: All of the objects in a CDB or PDB
All_view Objects accessible by the current user
User_view : Objects owned by the current user
Container ID
Rows Belong to
0
Whole CDB
1
CDB$ROOT
2
PDB$SEED
All other IDs
User created PDBs

11. Multitenant Architecture Users
• Common User. – Can connect and perform operations
within the root and every existing and future PDBs.
• Local User. – Specific user that can only operate within
the PDB. A restriction is that a user cannot begin with
c## or C##

12. My 12c Top Features
• Online rename and relocation of an active data file.
– ALTER DATABASE MOVE DATAFILE
• DDL logging
– ALTER SYSTEM|SESSION SET ENABLE_DDL_LOGGING=TRUE;
– $ORACLE_BASE/diag/rdbms/DBNAME/log|ddl
• Datapump
– Export View As a Table
– Turn off redo log generation for Datapump Imports
• TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y

13. My 12c Top Features
• Active Data Guard Far Sync
– Synchronous replication to a far sync instance (repeater)
situated at distance /reasonable latency, then
asynchronous replication to the final standby
SYNC
ASYNC

14. My 12c Top Features
• Oracle Flex ASM
– Enables an Oracle ASM instance to run on a separate
physical server from the database servers
• Parallel Upgrade Utility
– $ORACLE_HOME/perl/bin/perl catctl.pl -n 4 -l $ORACLE_HOME/
diagnostics catupgrd.sql

15. DEMO 1

16. What is RMAN?
• Oracle utility to perform backup and recovery, available
since version 8
Executable found in
$ORACLE_HOME/bin
RMAN Utility
recover.bsq
(library file)
Channel
Server
Session
Target
DB
DISK
MML

17. How does an RMAN
backup work?
Read Phase
Datafiles Input I/O Buffers
1
2
3
4
Write Phase
Copy Phase
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
1 MB
Output Buffers
Channel
Validation
Compression
Encryption
1 MB
1 MB
1 MB
1 MB
Backup Piece

18. SUPPORT FOR MULTITENANT CONTAINER
DATABASES AND PLUGGABLE DATABASES
• Backing up the CDB and all of its PDBs
rman target sys/oracle@cdb1
connected to target database: CDB1 (DBID=808250731)
RMAN> backup database plus archivelog;
• Backing up just one PDB
rman target sys/oracle@pdb1
connected to target database: CDB1 (DBID=808250731)
RMAN> backup database;
• Backing up the root
rman target sys/oracle@cdb1
connected to target database: CDB1 (DBID=808250731)
RMAN> backup database root;

19. SUPPORT FOR MULTITENANT CONTAINER
DATABASES AND PLUGGABLE DATABASES
• Restoring a PDB
oracle $ rman target sys/oracle@cdb1
connected to target database: CDB1 (DBID=808250731)
RMAN> RESTORE PLUGGABLE DATABASE PDB1;
RMAN> RECOVER PLUGGABLE DATABASE PDB1;
RMAN> ALTER PLUGGABLE DATABASE PDB1 OPEN;

20. SUPPORT FOR MULTITENANT CONTAINER
DATABASES AND PLUGGABLE DATABASES
• Be careful when dropping a PDB
RMAN> drop pluggable database PDB1;
Statement processed
RMAN> RESTORE PLUGGABLE DATABASE PDB1;
Starting restore at 13/02/2014 11:18:26
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=41 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 02/13/2014 11:18:27
RMAN-06813: could not translate pluggable database PDB1

21. Recovering Tables and Table Partitions
from RMAN Backups
ARCHIVELOG
MODE
DB in read-write
mode
RMAN backup
as existed at the
point in time
Target Database
1 Gigabyte extra
in memory for
the auxiliary
database
12.1, you need to
use a
SERVICE_NAME

22. Viewing Backup Reports

23. DEMO 2

24. Where is The DBA Job Going?
• Database as a Service (DBaaS)
– Revenues will grow from 150 million in 2012 to 1.8
billion by 2016 - Forbes
– Paradigm where end users can request database
services, consume it for the lifetime of the project, and
then have then automatically de-provisioned and
returned to the resource pool.
– Allows you scale out and scale back database
resources as needed.

25. FIT-ACER
• F – Focus (SLOW DOWN! Are you ready?)
• I – Identify server/DB name, time, authorization
• T – Type the command (do not hit enter yet)
•
•
•
•
A – Assess the command (SPEND TIME HERE!)
C – Check the server / database name again
E – Execute the command
R – Review and document the results

26. Thank you – Q&A
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