Oracle RACFailover 详解：http://www.51CTO提醒您，请勿滥发广告!/bbs/thread-31215-1-1.html

How To Configure Server Side TransparentApplication Failover [ID 460982.1]

1．创建TAFService

[oracle@db1 bin]$ ./srvctl add service -d orcl -s server_taf -r "orcl1,orcl2" -P BASIC

--这里的orcl是database name，orcl1和orcl2 是instance name。

2. 启动server_taf服务

[oracle@db1 bin]$ ./srvctl start service -d orcl -s server_taf

3. 检查service运行情况

[oracle@db1 bin]$ ./srvctl config service -d orcl

Service name: server_taf

Service is enabled

Server pool: orcl_server_taf

Cardinality: 2

Disconnect: false

Service role: PRIMARY

Management policy: AUTOMATIC

DTP transaction: false

AQ HA notifications: false

Failover type: NONE

Failover method: NONE

TAF failover retries: 0

TAF failover delay: 0

Connection Load Balancing Goal: LONG

Runtime Load Balancing Goal: NONE

TAF policy specification: BASIC

Edition:

Preferred instances: orcl1,orcl2

Available instances:

4.确认serviceID

SQL> select name,service_id from dba_services where name = 'server_taf';

NAMESERVICE_ID

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

server_taf3

5.给service添加参数：

SQL> execute dbms_service.modify_service (service_name => 'server_taf' -

, aq_ha_notifications => true -

, failover_method => dbms_service.failover_method_basic -

, failover_type => dbms_service.failover_type_select -

, failover_retries => 180 -

, failover_delay => 5 -

, clb_goal => dbms_service.clb_goal_long);

6. 确认参数修改：

col name format a15

col failover_method format a11 heading 'METHOD'

col failover_type format a10 heading 'TYPE'

col failover_retries format 9999999 heading 'RETRIES'

col goal format a10

col clb_goal format a8

col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT'

SQL> select name, failover_method,failover_type, failover_retries,goal, clb_goal,aq_ha_notifications from dba_services where service_id = 3;

NAMEMETHODTYPERETRIES GOALCLB_GOAL AQNOT

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

server_tafBASICSELECT180 NONELONGYES

SQL>

7. 检查service注册情况：

[oracle@db1 bin]$ lsnrctl services

LSNRCTL for Linux: Version 11.2.0.3.0 -Production on 15-JUL-2012 13:26:43

Copyright (c) 1991, 2011, Oracle.All rights reserved.

Connecting to(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=db1)(PORT=1521)))

Services Summary...

Service "+ASM" has 1 instance(s).

Instance "+ASM1", status READY, has 1 handler(s) for thisservice...

Handler(s):

"DEDICATED" established:57 refused:0 state:ready

LOCAL SERVER

Service "orcl" has 1 instance(s).

Instance "orcl1", status READY, has 1 handler(s) for thisservice...

Handler(s):

"DEDICATED" established:11 refused:0 state:ready

LOCAL SERVER

Service "orclXDB" has 1instance(s).

Instance "orcl1", status READY, has 1 handler(s) for thisservice...

Handler(s):

"D000" established:0 refused:0 current:0 max:1022 state:ready

DISPATCHER

(ADDRESS=(PROTOCOL=tcp)(HOST=db1.tianlesoftware.com)(PORT=38731))

Service "server_taf" has 1instance(s).

Instance "orcl1", status READY, has 1 handler(s) for thisservice...

Handler(s):

"DEDICATED" established:11 refused:0 state:ready

LOCAL SERVER

The command completed successfully

8. 客户端就可以使用Service-SideTAF了：

在客户端TNS 配置：

orcl =

(DESCRIPTION=

(ADDRESS=(PROTOCOL=tcp)(HOST= orcl.tianlesoftware.com)(PORT=1521))

(CONNECT_DATA=

(SERVER=DEDICATED)

(SERVICE_NAME=orcl)

)

)

-- orcl.tianlesoftware.com是SCAN IP地址。

9.查看进程状态

[oracle@db1 bin]$ ./crs_stat -t

NameTypeTargetStateHost

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

ora.DATA.dgora....up.type ONLINEONLINEdb1

ora.FRA.dgora....up.type ONLINEONLINEdb1

ora....ER.lsnr ora....er.type ONLINEONLINEdb1

ora....N1.lsnr ora....er.type ONLINEONLINEdb2

ora....N2.lsnr ora....er.type ONLINEONLINEdb1

ora....N3.lsnr ora....er.type ONLINEONLINEdb1

ora.OCR.dgora....up.type ONLINEONLINEdb1

ora.asmora.asm.typeONLINEONLINEdb1

ora....SM1.asm applicationONLINEONLINEdb1

ora....01.lsnr applicationONLINEONLINEdb1

ora....-01.gsd applicationOFFLINEOFFLINE

ora....-01.ons applicationONLINEONLINEdb1

ora....-01.vip ora....t1.type ONLINEONLINEdb1

ora....SM2.asm applicationONLINEONLINEdb2

ora....02.lsnr applicationONLINEONLINEdb2

ora....-02.gsd applicationOFFLINEOFFLINE

ora....-02.ons applicationONLINEONLINEdb2

ora....-02.vip ora....t1.type ONLINEONLINEdb2

ora.cvuora.cvu.typeONLINEONLINEdb1

ora.gsdora.gsd.typeOFFLINEOFFLINE

ora....network ora....rk.type ONLINEONLINEdb1

ora.oc4jora.oc4j.typeONLINEONLINEdb1

ora.onsora.ons.typeONLINEONLINEdb1

ora.orcl.dbora....se.type ONLINEONLINEdb1

ora....taf.svc ora....ce.type ONLINEONLINEdb1

ora.scan1.vipora....ip.type ONLINEONLINEdb2

ora.scan2.vipora....ip.type ONLINEONLINEdb1

ora.scan3.vipora....ip.type ONLINEONLINEdb1