service作为oracle数据库中的关键概念之一，利用得当，可以方便数据库的管理，提高数据库的执行效率。
通过service，oracle可以实现server side taf，简化对客户端的维护量，下面我们看一下在10g rac 怎样实验service实现 serve side taf
使用dbca来配置taf
通过dbca可以非常方便的配置server side taf
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至此，service配置完成，下面我们验证一下
[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 Applicatio