Oracle 12c and its pluggable databases
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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.
Oracle 12c and its pluggable databases
- 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
- 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 To contact us sales@pythian.com 1-877-PYTHIAN To follow us http://www.pythian.com/blog http://www.facebook.com/pages/The-Pythian-Group/163902527671 @pythian http://www.linkedin.com/company/pythian