Amit Oracle DBA Blog: 2015

Connecting to the root of a container database is the same as that of any previous database instance. On the database server you can use OS Authentication.

[oracle@vmdb12c ~]$ sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Mon Nov 30 11:38:44 2015

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show con_name

CON_NAME
——————————
CDB$ROOT

The V$SERVICES views can be used to display available services from the database.

SQL> select name,pdb from v$services order by 2;

NAME PDB
——————– ———-
zwcXDB CDB$ROOT
SYS$BACKGROUND CDB$ROOT
SYS$USERS CDB$ROOT
ptest12c PTEST12C
ptest12c_1 PTEST12C_1
ptest12c_2 PTEST12C_2

6 rows selected.

The lsnrctl utility allows you to display the available services from the command line.

[oracle@vmdb12c ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 01-DEC-2015 12:17:38

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))

STATUS of the LISTENER

------------------------

Alias LISTENER_TEST12C

Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production

Start Date 16-NOV-2015 18:02:53

Uptime 14 days 18 hr. 14 min. 45 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /data/amit/app/oracle/product/12.1.0/db_1/network/admin/listener.ora

Listener Log File /data/amit/app/oracle/diag/tnslsnr/bigdata2/listener_test12c/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1522)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=localhost.localdomain)(PORT=5500))(Security=(my_wallet_directory=/data/amit/app/oracle/admin/test12c/xdb_wallet))(Presentation=HTTP)(Session=RAW))

Services Summary...

Service "PLSExtProc" has 1 instance(s).

Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...

Service "PTEST12C" has 2 instance(s).

Instance "PTEST12C", status UNKNOWN, has 1 handler(s) for this service...

Instance "test12c", status READY, has 1 handler(s) for this service...

Service "ptest12c_1" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Service "ptest12c_2" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Service "ptest12c_3" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Service "test12c" has 2 instance(s).

Instance "test12c", status UNKNOWN, has 1 handler(s) for this service...

Instance "test12c", status READY, has 1 handler(s) for this service...

Service "test12cXDB" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

The command completed successfully

[oracle@vmdb12c ~]$ lsnrctl service

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 01-DEC-2015 12:19:05

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))

Services Summary...

Service "PLSExtProc" has 1 instance(s).

Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:0 refused:0

LOCAL SERVER

Service "PTEST12C" has 2 instance(s).

Instance "PTEST12C", status UNKNOWN, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:71 refused:0

LOCAL SERVER

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:1 refused:0 state:ready

LOCAL SERVER

Service "ptest12c_1" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:1 refused:0 state:ready

LOCAL SERVER

Service "ptest12c_2" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:1 refused:0 state:ready

LOCAL SERVER

Service "ptest12c_3" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:1 refused:0 state:ready

LOCAL SERVER

Service "test12c" has 2 instance(s).

Instance "test12c", status UNKNOWN, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:10 refused:0

LOCAL SERVER

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

"DEDICATED" established:1 refused:0 state:ready

LOCAL SERVER

Service "test12cXDB" has 1 instance(s).

Instance "test12c", status READY, has 1 handler(s) for this service...

Handler(s):

.......

The command completed successfully

Connections using services are unchanged from previous versions.
easy connect

[oracle@vmdb12c ~]$ sqlplus system/oracle123@202.137.235.171:1521/PTEST12C_2

SQL*Plus: Release 12.1.0.2.0 Production on Tue Dec 1 15:24:39 2015

Last Successful login time: Tue Dec 01 2015 13:00:19 +05:30

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show con_name

CON_NAME

------------------------------

PTEST12C_2

[oracle@vmdb12c ~]$ sqlplus system/oracle123@202.137.235.171:1521/PTEST12C_3

SQL*Plus: Release 12.1.0.2.0 Production on Tue Dec 1 15:24:39 2015

Last Successful login time: Tue Dec 01 2015 13:00:19 +05:30

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show con_name

CON_NAME

------------------------------

PTEST12C_3

tnsnames.ora

[oracle@vmdb12c ~]$sqlplus system/oracle@PTEST12C_3

SQL*Plus: Release 12.1.0.2.0 Production on Tue Dec 1 15:47:25 2015

Last Successful login time: Tue Dec 01 2015 15:24:39 +05:30

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show con_name

CON_NAME

------------------------------

PTEST12C_3

[oracle@vmdb12c ~]$sqlplus system/oracle@PTEST12C_1

SQL*Plus: Release 12.1.0.2.0 Production on Tue Dec 1 15:47:25 2015

Last Successful login time: Tue Dec 01 2015 15:24:39 +05:30

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show con_name

CON_NAME

------------------------------

PTEST12C_1

tnsnames.ora

TEST12C =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = test12c)

)

PTEST12C =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = PTEST12C)

)

PTEST12C_1 =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = PTEST12C_1)

)

PTEST12C_3 =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = PTEST12C_3)

)

LISTENER_TEST12C =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))

When logged in to the CDB as an appropriately privileged user, the ALTER SESSION command can be used to switch between containers within the container database.

[oracle@vmdb12c ~]$ sqlplus "/ as sysdba"

SQL*Plus: Release 12.1.0.2.0 Production on Tue Dec 1 15:53:10 2015

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> alter session set container=PTEST12C_1;

Session altered.

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED

---------- ------------------------------ ---------- ----------

4 PTEST12C_1 READ WRITE NO

SQL> alter session set container=PTEST12C_2;

Session altered.

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED

---------- ------------------------------ ---------- ----------

5 PTEST12C_2 READ WRITE NO

SQL> alter session set container=cdb$root;

Session altered.

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED

---------- ------------------------------ ---------- ----------

2 PDB$SEED READ ONLY NO

4 PTEST12C_1 READ WRITE NO

5 PTEST12C_2 READ WRITE NO

6 PTEST12C_3 READ WRITE NO

SQL> select sys_context('USERENV','CON_NAME') from dual;

SYS_CONTEXT('USERENV','CON_NAME')
——————————————————————————–
CDB$ROOT

SQL> alter session set container=PTEST12C_1;

Session altered.

SQL> select sys_context('USERENV','CON_NAME') from dual;

SYS_CONTEXT('USERENV','CON_NAME')
——————————————————————————–
PTEST12C_1

I hope this article helped you. Your suggestions/feedback are most welcome.

Keep learning... Have a great day!!!

In this session we will see how to recover spfile from rman backup.

Considering we have RMAN backup available that has a copy of the spfile

Case 1) Autobackup in Flash (or now called Fast) Recovery Area

The SPFILE has accidently been deleted and now the database is not starting up after a shutdown has been

executed.

FRA has been configured.

If FRA has been configured, the backup of the SPFILE is located in the autobackup sub-directory.

For example:

amit/app/oracle/fast_recovery_area/TEST12C/autobackup/2015_11_25/o1_mf_s_896703524_c5bpgjs5_.bkp'

Note that it is stored in OMF format in this example. The ‘s’ in the string identifies the OMF as a backup

related to the SPFILE

To recover from loss of SPFILE if you are NOT using an RMAN Catalog, we need to do two things first :

1) Set the DBID

2) Issue the STARTUP NOMOUNT FORCE command from an RMAN prompt (note – not SQL*PLUS)

RMAN> SET DBID=1500410030;

executing command: SET DBID

RMAN> startup nomount force;

startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/data/amit/app/oracle/product/12.1.0/db_1/dbs/inittest12c.ora'

starting Oracle instance without parameter file for retrieval of spfile

Oracle instance started

Total System Global Area    1073741824 bytes

Fixed Size                     2932632 bytes
Variable Size                293601384 bytes
Database Buffers             771751936 bytes
Redo Buffers                   5455872 bytes

This is a typical error we will face when either restoring the SPFILE or control file from an autobackup.

RMAN> restore spfile from autobackup;

Starting restore at 25-NOV-15
using channel ORA_DISK_1

channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151125
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151124
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151123
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151122
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151121
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151120
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151119
channel ORA_DISK_1: no AUTOBACKUP in 7 days found
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 11/25/2015 16:01:20
RMAN-06172: no AUTOBACKUP found or specified handle is not a valid copy or piece

The reason in this case is that since the spfile is missing and we have mounted the instance using a dummy

spfile, the database needs to know where to look to find the autobackup of the spfile .

So now we include the db_file_recovery_dest and db_name parameters in the RESTORE SPFILE command.

RMAN> restore spfile from '/data/amit/app/oracle/fast_recovery_area/TEST12C/autobackup/2015_11_25/o1_mf_s_896703524_c5bpgjs5_.bkp';

Starting restore at 25-NOV-15
using channel ORA_DISK_1

channel ORA_DISK_1: restoring spfile from AUTOBACKUP /data/amit/app/oracle/fast_recovery_area/TEST12C/autobackup/2015_11_25/o1_mf_s_896703524_c5bpgjs5_.bkp
channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete
Finished restore at 25-NOV-15

Case 2) Autobackup in non-FRA location – non OMF

RMAN> startup nomount force

startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/inittest12c.ora'

starting Oracle instance without parameter file for retrieval of spfile
Oracle instance started

Total System Global Area     158662656 bytes

Fixed Size                     2226456 bytes
Variable Size                104859368 bytes
Database Buffers              46137344 bytes
Redo Buffers                   5439488 bytes

RMAN> set DBID=2968723077

executing command: SET DBID

RMAN>  run {
2> set CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/u01/backup/%F';
3> restore spfile from autobackup;
4> }

executing command: SET CONTROLFILE AUTOBACKUP FORMAT

Starting restore at 13-JUN-13
using channel ORA_DISK_1

channel ORA_DISK_1: looking for AUTOBACKUP on day: 20151119
channel ORA_DISK_1: AUTOBACKUP found: '/u01/backup/c-2968723077-20151119-01
channel ORA_DISK_1: restoring spfile from AUTOBACKUP '/u01/backup/c-2968723077-20130613-01
channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete
Finished restore at 13-JUN-13

I hope this article helped you. Your suggestions/feedback are most welcome.

Keep learning... Have a great day!!!

Amit Oracle DBA Blog

MYSQL

Tuesday, 1 December 2015

Connecting to Container Databases (CDB) and Pluggable Databases (PDB) in Oracle Database 12c

Wednesday, 25 November 2015

Recovery scenarios involving loss of SPFILE