service由于oracle数据库中的一个关键概念，利用得当，可以轻松地管理数据库，提高数据库的工作效率。

经service。oracle可以实现server side  taf，简单化client维修，下面我们来看看10g rac 如何测试service实现 serve side  taf

使用dbca来配置taf

通过dbca能够很方便的配置server  side taf

至此。service配置完毕，以下我们验证一下

[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 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: racdb2

从上面的结果能够看出，通过dbca配置service 的taf，会在ocr中存储taf配置信息（不过taf method），在数据库參数文件里会加入service条目，而且在数据字典中加入对应记录，可是数据字典中的taf信息是空的，须要另外加入。如

SQL> 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，也能够使用srvctl来加入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.

从这里。能够看出通过srvct加入的service不会在数据库參数和数据字典中加入对应的信息