Moving PDB from RAC CDB to Single Instance CDB

The RAC CDB and the non-RAC CDB are both 12.1.0.2 SE2 instances. Currently the single instance CDB doesn't have any PDB plugged on it. SE2 CDBs only support single tenancy due to license restriction. The RAC CDB has a PDB available on both instances.

INSTANCE     NAME         OPEN_MODE  STATUS    RES
------------ ------------ ---------- --------- ---
stdcdb1      PDB$SEED     READ ONLY  NORMAL    NO
stdcdb1      STDPDB       READ WRITE NORMAL    NO
stdcdb2      PDB$SEED     READ ONLY  NORMAL    NO
stdcdb2      STDPDB       READ WRITE NORMAL    NO

Both CDBs has same components except for RAC components which is set not available on the single instance CDB. DB registry of the RAC CDB

SQL> select comp_name,status from dba_registry order by 1;

COMP_NAME                                STATUS
---------------------------------------- -----------
JServer JAVA Virtual Machine             VALID
Oracle Application Express               VALID
Oracle Database Catalog Views            VALID
Oracle Database Java Packages            VALID
Oracle Database Packages and Types       VALID
Oracle Multimedia                        VALID
Oracle Real Application Clusters         VALID
Oracle Text                              VALID
Oracle Workspace Manager                 VALID
Oracle XDK                               VALID
Oracle XML Database                      VALID

DB Registry of the non-RAC CDB

SQL> select comp_name,status from dba_registry order by 1;

COMP_NAME                                STATUS
---------------------------------------- -----------
JServer JAVA Virtual Machine             VALID
Oracle Application Express               VALID
Oracle Database Catalog Views            VALID
Oracle Database Java Packages            VALID
Oracle Database Packages and Types       VALID
Oracle Multimedia                        VALID
Oracle Real Application Clusters         OPTION OFF
Oracle Text                              VALID
Oracle Workspace Manager                 VALID
Oracle XDK                               VALID
Oracle XML Database                      VALID

Process of moving the PDB is similar to earlier post except for few RAC and ASM related tasks. To summarize, before the PDB could be moved from currently plugged in CDB, it must be stopped, unplugged and dropped. The unplugging will create a PDB descriptor file and on in the DB file names will appear in lower case while rest of the path appear upper case.

cat stdpdb_desc.xml | grep path
+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/DATAFILE/system.291.894734477
+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/DATAFILE/sysaux.292.894734481
+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/TEMPFILE/temp.295.922121143
+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/DATAFILE/users.293.894734495
+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/DATAFILE/tapp.294.894734495

However when data files are copied out of ASM using asmcmd they will have the names in upper case (e.g. SYSTEM.291.894734477). As a result plugging will fail as it is unable to identify the file name

create pluggable database stdpdb as clone using '/home/oracle/stdcdb/datafiles/stdpdb_desc.xml'
*
ERROR at line 1:
ORA-19505: failed to identify file "/home/oracle/stdcdb/datafiles/system.291.894734477"
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory

SQL> ! ls "/home/oracle/stdcdb/datafiles/system.291.894734477"
ls: /home/oracle/stdcdb/datafiles/system.291.894734477: No such file or directory

SQL> ! ls -l /home/oracle/stdcdb/datafiles/*
-rw-r--r-- 1 oracle oinstall      6925 Sep 12 10:47 /home/oracle/stdcdb/datafiles/stdpdb_desc.xml
-rw-r----- 1 oracle oinstall 550510592 Sep 12 10:44 /home/oracle/stdcdb/datafiles/SYSAUX.292.894734481
-rw-r----- 1 oracle oinstall 293609472 Sep 12 10:45 /home/oracle/stdcdb/datafiles/SYSTEM.291.894734477
-rw-r----- 1 oracle oinstall  20979712 Sep 12 10:45 /home/oracle/stdcdb/datafiles/TAPP.294.894734495
-rw-r----- 1 oracle oinstall   5251072 Sep 12 10:45 /home/oracle/stdcdb/datafiles/USERS.293.894734495

So before the plugging rename the file names same as on descriptor file.

 mv SYSTEM.291.894734477 system.291.894734477
 mv SYSAUX.292.894734481 sysaux.292.894734481
 mv TAPP.294.894734495 tapp.294.894734495
 mv USERS.293.894734495 users.293.894734495

Also in ASM datafiles and tempfiles have separate paths, as a result the tempfile location must also specified in the source_file_name convert even though file itself is not necessary to be copied to new location. Temp file get dropped when the PDB is dropped even though keep data file options is used.

drop pluggable database stdpdb keep datafiles
Deleted Oracle managed file +DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/TEMPFILE/temp.295.922364799
Completed: drop pluggable database stdpdb keep datafiles

So the final command to plug the PDB into single instance will have two file name convert entires, one for data files and another for temp files

create pluggable database stdpdb as clone using '/home/oracle/stdcdb/datafiles/stdpdb_desc.xml'
source_file_name_convert=(
'+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/DATAFILE','/home/oracle/stdcdb/datafiles',
'+DATA/STDCDB/238FA674AFE26E9DE0535E00A8C0F5A1/TEMPFILE','/home/oracle/stdcdb/datafiles') move;

Once the PDB is plugged open it

SQL> show pdbs

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

SQL> alter pluggable database stdpdb open;

SQL> show pdbs

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 STDPDB                         READ WRITE NO

SQL> select name from v$datafile;

NAME
-----------------------------------------------------------------------------------------------
/ssdoracle/oradata/STDCDB/datafile/o1_mf_undotbs1_cx2j8d05_.dbf
/ssdoracle/oradata/STDCDB/3C4F4864ACAE0C3DE0534200A8C05C7A/datafile/o1_mf_system_cxf6fp5g_.dbf
/ssdoracle/oradata/STDCDB/3C4F4864ACAE0C3DE0534200A8C05C7A/datafile/o1_mf_sysaux_cxf6fp5h_.dbf
/ssdoracle/oradata/STDCDB/3C4F4864ACAE0C3DE0534200A8C05C7A/datafile/o1_mf_users_cxf6fp5j_.dbf
/ssdoracle/oradata/STDCDB/3C4F4864ACAE0C3DE0534200A8C05C7A/datafile/o1_mf_tapp_cxf6fp5k_.dbf

Looking at the PDB violation view will show the warning related to missing RAC option.

SQL> select name,status,action,message from PDB_PLUG_IN_VIOLATIONS where cause='OPTION';

NAME     STATUS    ACTION                                             MESSAGE
-------- --------- -------------------------------------------------- -------------------------------------------------------------------------------------------
STDPDB   PENDING   Fix the database option in the PDB or the CDB      Database option RAC mismatch: PDB installed version 12.1.0.2.0. CDB installed version NULL.

Login into the PDB and turn off the RAC options

SQL> alter session set container=stdpdb;

SQL> show con_name

CON_NAME
---------
STDPDB

SQL> select comp_name,status from dba_registry order by 1;

COMP_NAME                                STATUS
---------------------------------------- -----------
JServer JAVA Virtual Machine             VALID
Oracle Application Express               VALID
Oracle Database Catalog Views            VALID
Oracle Database Java Packages            VALID
Oracle Database Packages and Types       VALID
Oracle Multimedia                        VALID
Oracle Real Application Clusters         VALID
Oracle Text                              VALID
Oracle Workspace Manager                 VALID
Oracle XDK                               VALID
Oracle XML Database                      VALID

11 rows selected.

SQL> exec dbms_registry.OPTION_OFF('RAC');

SQL> select comp_name,status from dba_registry order by 1;

COMP_NAME                                STATUS
---------------------------------------- -----------
JServer JAVA Virtual Machine             VALID
Oracle Application Express               VALID
Oracle Database Catalog Views            VALID
Oracle Database Java Packages            VALID
Oracle Database Packages and Types       VALID
Oracle Multimedia                        VALID
Oracle Real Application Clusters         OPTION OFF
Oracle Text                              VALID
Oracle Workspace Manager                 VALID
Oracle XDK                               VALID
Oracle XML Database                      VALID

Close and open the PDB. The PDB violation view will show the issue has been resolved.

SQL> select name,status,action,message from PDB_PLUG_IN_VIOLATIONS where cause='OPTION';

NAME     STATUS    ACTION                                             MESSAGE
-------- --------- -------------------------------------------------- -------------------------------------------------------------------------------------------
STDPDB   RESOLVED  Fix the database option in the PDB or the CDB      Database option RAC mismatch: PDB installed version 12.1.0.2.0. CDB installed version NULL.

This concludes the moving of PDB from RAC CDB to single instance CDB.

Related Posts
Move a PDB Between Servers
Plugging a SE2 non-CDB as an EE PDB Using File Copying and Remote Link