in Oracle

Services — 1 : Services in non-RAC 12c MultiTenant

It is generally accepted that service definition is required in RAC environments.

However, the concept of Services was made available in 8i — predating RAC. Services can be defined in non-OPS / non-RAC / non-MultiTenant / MultiTenant environments. A single PDB in a 12c MultiTenant database can host multiple services.

A quick start to the implementation.

Note : srvctl is to be used to create and manage services in a RAC environment. srvctl registers the services with the Cluster Registry. In a Non-RAC environment, use DBMS_SERVICE.

First, no services are running :

[grid@ora12102 ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 14-JUN-2016 23:14:48

Copyright (c) 1991, 2014, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production
Start Date 14-JUN-2016 23:14:28
Uptime 0 days 0 hr. 0 min. 19 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/ora12102/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora12102)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM", status READY, has 1 handler(s) for this service...
The command completed successfully
[grid@ora12102 ~]$

Next, I startup the MultiTenant CDB database.

[oracle@ora12102 ~]$ . oraenv
ORACLE_SID = [CDB1] ? CDB1
The Oracle base remains unchanged with value /u01/app/oracle
[oracle@ora12102 ~]$ sqlplus '/ as sysdba'

SQL*Plus: Release 12.1.0.2.0 Production on Tue Jun 14 23:15:47 2016

Copyright (c) 1982, 2014, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 1644167168 bytes
Fixed Size 2925024 bytes
Variable Size 1056968224 bytes
Database Buffers 570425344 bytes
Redo Buffers 13848576 bytes
Database mounted.
Database opened.
SQL> alter pluggable database pdb1 open;

Pluggable database altered.

SQL>


[grid@ora12102 ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 14-JUN-2016 23:17:23

Copyright (c) 1991, 2014, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production
Start Date 14-JUN-2016 23:14:28
Uptime 0 days 0 hr. 2 min. 54 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/ora12102/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora12102)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ora12102)(PORT=5501))(Security=(my_wallet_directory=/u01/app/oracle/admin/CDB1/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "CDB1" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "CDB1XDB" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "pdb1" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
The command completed successfully
[grid@ora12102 ~]$

So, now I have the default pdb1 srevice for pluggable database PDB1 running.

Next, I manually create two new services and start them.

SQL> exit
Disconnected from Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and Real Application Testing options
[oracle@ora12102 ~]$ sqlplus 'sys/oracle@PDB1 as sysdba'

SQL*Plus: Release 12.1.0.2.0 Production on Tue Jun 14 23:20:30 2016

Copyright (c) 1982, 2014, Oracle. All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and Real Application Testing options

SQL> show con_id

CON_ID
------------------------------
3
SQL> show con_name

CON_NAME
------------------------------
PDB1
SQL>
SQL> exec dbms_service.create_service(service_name=>'NEW_APP1',network_name=>'NEW_APP1');

PL/SQL procedure successfully completed.

SQL> exec dbms_service.create_service('NEW_APP2','NEW_APP2');

PL/SQL procedure successfully completed.

SQL> exec dbms_service.start_service('NEW_APP1');

PL/SQL procedure successfully completed.

SQL> exec dbms_service.start_service('NEW_APP2');

PL/SQL procedure successfully completed.

SQL>
[grid@ora12102 ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 14-JUN-2016 23:22:54

Copyright (c) 1991, 2014, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production
Start Date 14-JUN-2016 23:14:28
Uptime 0 days 0 hr. 8 min. 26 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/ora12102/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora12102)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ora12102)(PORT=5501))(Security=(my_wallet_directory=/u01/app/oracle/admin/CDB1/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "CDB1" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "CDB1XDB" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "NEW_APP1" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "NEW_APP2" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
Service "pdb1" has 1 instance(s).
Instance "CDB1", status READY, has 1 handler(s) for this service...
The command completed successfully
[grid@ora12102 ~]$

The two new services NEW_APP1 and NEW_APP2 that I created in PDB1 are now registered with the listener. Remember that these services are in the Database Instance CDB1.

My next blog post will be about using these services.

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