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Multitenant Architecture Diagram 
PDBid1 
PDBid1 PDBid2 
PDBid2 
PDBid1 
Dictionary Object Definition 
Multitenant Container Database (CDB) 
Dictionary (Metadata) 
Object Data 
Fast Inter-Pluggable Database (PDB) Database Link 
Local Privilege 
SYSTEM 
SYSAUX Application Tempfiles Undo 
Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners. 
listener.ora 
CDB Resource 
Plan 
CDB Instance PDB _1 PDB_n 
PDB_n 
CDB 
Views 
CDB_SERVICES 
DBA_OBJECTS 
. . . DBMS_* . . AWR 
OBJ$ 
PDB_1 
PDB Resource 
Plan 
PDB Datafiles 
ApplicationTempfiles SYSTEM SYSAUX 
PDB Resource 
Plan 
OBJ$ . . 
Root Database 
( CDB$ROOT ) 
CDB Instance 
Background 
processes Wallet Alert log SPFILE 
Foreground processes 
Common User 
Common Role 
Common Privilege 
Metadata-link 
Object-links 
. . 
... 
SGA 
PDBid1 PDBid2 
PDBid1 PDBid2 
PDBid1 PDBid2 
PDBid2 
PDBid1 
SYS... 
C##... 
DBA, CDB_DBA... 
C##... 
Local Privilege 
Local Privilege 
ApplicationTempfiles SYSTEM SYSAUX 
Common 
User 
Local 
User 
Common 
Role 
Local 
Role 
Common 
User 
Local 
User 
Common 
Role 
Local 
Role 
OBJ$ 
PDB Datafiles 
PDB$SEED 
OBJ$ . . 
Common 
User 
SYSTEM SYSAUX 
Tempfile 
Control 
files 
Redo log 
files Datafiles 
Flashback 
logs 
Archived 
redo log files 
Root Files 
Change 
Tracking 
file

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Oracle 12c Multitenant architecture

  • 1. Multitenant Architecture Diagram PDBid1 PDBid1 PDBid2 PDBid2 PDBid1 Dictionary Object Definition Multitenant Container Database (CDB) Dictionary (Metadata) Object Data Fast Inter-Pluggable Database (PDB) Database Link Local Privilege SYSTEM SYSAUX Application Tempfiles Undo Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names may be trademarks of their respective owners. listener.ora CDB Resource Plan CDB Instance PDB _1 PDB_n PDB_n CDB Views CDB_SERVICES DBA_OBJECTS . . . DBMS_* . . AWR OBJ$ PDB_1 PDB Resource Plan PDB Datafiles ApplicationTempfiles SYSTEM SYSAUX PDB Resource Plan OBJ$ . . Root Database ( CDB$ROOT ) CDB Instance Background processes Wallet Alert log SPFILE Foreground processes Common User Common Role Common Privilege Metadata-link Object-links . . ... SGA PDBid1 PDBid2 PDBid1 PDBid2 PDBid1 PDBid2 PDBid2 PDBid1 SYS... C##... DBA, CDB_DBA... C##... Local Privilege Local Privilege ApplicationTempfiles SYSTEM SYSAUX Common User Local User Common Role Local Role Common User Local User Common Role Local Role OBJ$ PDB Datafiles PDB$SEED OBJ$ . . Common User SYSTEM SYSAUX Tempfile Control files Redo log files Datafiles Flashback logs Archived redo log files Root Files Change Tracking file