service作爲oracle數據庫中的關鍵概念之一，利用得當，可以方便數據庫的管理，提高數據庫的執行效率。
通過service，oracle可以實現server side taf，簡化對客戶端的維護量，下面我們看一下在10g rac 怎樣實驗service實現 serve side taf
使用dbca來配置taf
通過dbca可以非常方便的配置server side taf
至此，service配置完成，下面我們驗證一下
[root@node1 ~]# su - oracle
[oracle@node1 ~]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 05-AUG-2014 21:46:10
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER_NODE1
Version TNSLSNR for Linux: Version 10.2.0.5.0 - Production
Start Date 05-AUG-2014 21:26:40
Uptime 0 days 0 hr. 19 min. 30 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/db/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/11.2.0/db/network/log/listener_node1.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.131)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.31)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM1", status BLOCKED, has 1 handler(s) for this service...
Service "+ASM_XPT" has 1 instance(s).
Instance "+ASM1", status BLOCKED, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "racdb" has 3 instance(s).
Instance "racdb", status UNKNOWN, has 1 handler(s) for this service...
Instance "racdb1", status READY, has 2 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "racdbXDB" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "racdb_XPT" has 2 instance(s).
Instance "racdb1", status READY, has 2 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "service1" has 1 instance(s).
Instance "racdb1", status READY, has 2 handler(s) for this service...
The command completed successfully
[oracle@node1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.5.0 - Production on Tue Aug 5 21:46:23 2014
Copyright (c) 1982, 2010, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
SQL> show parameter service
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string service1
SQL> col name for a20
SQL> col failover_method for a20
SQL> col failover_type for a20
SQL> select name,failover_method,failover_type from dba_services;
NAME FAILOVER_METHOD FAILOVER_TYPE
-------------------- -------------------- --------------------
SYS$BACKGROUND
SYS$USERS
seeddataXDB
seeddata.regress.rdb
ms.dev.us.oracle.com
racdbXDB
racdb
service1
7 rows selected.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
[oracle@node1 ~]$ srvctl config service -d racdb -s service1 -a
service1 PREF: racdb1 AVAIL: racdb2 TAF: basic
[oracle@node1 ~]$ srvctl config service -d racdb
service1 PREF: racdb1 AVAIL: racdb2SQL> begin
2 dbms_service.modify_service(
3 service_name=>'service1',
4 failover_method=>dbms_service.failover_method_basic,
5 failover_type => dbms_service.failover_type_select,
6 failover_retries => 180,
7 failover_delay => 5
8 );
9 end;
10 /
PL/SQL procedure successfully completed.
SQL> col name for a20
SQL> col failover_method for a20
SQL> col failover_type for a20
SQL> select name,failover_method,failover_type from dba_services;
NAME FAILOVER_METHOD FAILOVER_TYPE
-------------------- -------------------- --------------------
SYS$BACKGROUND
SYS$USERS
seeddataXDB
seeddata.regress.rdb
ms.dev.us.oracle.com
racdbXDB
racdb
service1 BASIC SELECT
7 rows selected.另外，也可以使用srvctl來添加service
[root@node1 ~]# srvctl add service -h
Usage: srvctl add service -d <name> -s <service_name> -r "<preferred_list>" [-a "<available_list>"] [-P <TAF_policy>]
-d <name> Unique name for the database
-s <service> Service name
-r "<pref_list>" List of preferred instances
-a "<avail_list>" List of available instances
-P <TAF_policy> TAF policy (NONE, BASIC, or PRECONNECT)
Usage: srvctl add service -d <name> -s <service_name> -u {-r "<new_pref_inst>" | -a "<new_avail_inst>"}
-d <name> Unique name for the database
-s <service> Service name
-u Add a new instance to service configuration
-r <new_pref_inst> Name of new preferred instance
-a <new_avail_inst> Name of new available instance
-h Print usage
[root@node1 ~]# srvctl add service -d racdb -s service2 -r racdb1 -a racdb2 -P BASIC
PRKH-1014 : Current user root is not the same as oracle owner oracle of oracle home /u01/app/oracle/product/11.2.0/db.
[root@node1 ~]# su - oracle
[oracle@node1 ~]$ srvctl add service -d racdb -s service2 -r racdb1 -a racdb2 -P BASIC
[oracle@node1 ~]$ srvctl config service -d racdb -a
service1 PREF: racdb1 AVAIL: racdb2 TAF: basic
service2 PREF: racdb1 AVAIL: racdb2 TAF: BASIC
[oracle@node1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.5.0 - Production on Tue Aug 5 22:16:43 2014
Copyright (c) 1982, 2010, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
SQL> show parameter service
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string service1, racdb
SQL> select name from dba_services;
NAME
----------------------------------------------------------------
SYS$BACKGROUND
SYS$USERS
seeddataXDB
seeddata.regress.rdbms.dev.us.oracle.com
racdbXDB
racdb
service1
7 rows selected.從這裏，可以看出通過srvct添加的service不會在數據庫參數和數據字典中添加相應的信息