配置Server Side TAF
实验环境：Oracle 11.2.0.4 RAC参考MOS文档：
How To Configure Server Side Transparent Application Failover (文档>
[*]1.为设置TAF在RAC集群上新建服务
[*]2.启动server_taf服务
[*]3.检查确认服务正在运行
[*]4.找到刚创建服务的service_id
[*]5.根据service_id审查服务的信息
[*]6.给服务添加server side failover参数
[*]7.再次审查服务可以看到Method, Type和Retries值
[*]8.检查已注册的服务的监听信息
[*]9.创建网络服务名
[*]10.测试TAF功能
1.为设置TAF在RAC集群上新建服务
eg: srvctl add service -d rac -s server_taf -r "rac1,rac2" -P BASIC
使用oracle用户在RAC集群上新建服务server_taf:
$ srvctl add service -d jyzhao -s server_taf -r "jyzhao1,jyzhao2" -P BASIC
$
注意不能使用grid用户操作，如果使用grid 用户执行的话，会报错:
$ srvctl add service -d jyzhao -s server_taf -r "jyzhao1,jyzhao2" -P BASIC
PRCD-1288 : User is not authorized to create service server_taf for database jyzhao
PRKH-1014 : Current user "grid" is not the oracle owner user "oracle" of oracle home "/opt/app/oracle/product/11.2.0/dbhome_1"
2.启动server_taf服务
eg: srvctl start service -d rac -s server_taf
启动server_taf服务
$ srvctl start service -d jyzhao -s server_taf
3.检查确认服务正在运行
eg: srvctl config service -d rac
检查确认服务正在运行:
$ srvctl config service -d jyzhao
Service name: server_taf
Service is enabled
Server pool: jyzhao_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: jyzhao1,jyzhao2
Available instances:
4.找到刚创建服务的service_id
eg: select name,service_id from dba_services where name = 'server_taf';
找到刚创建服务的service_id
SQL> select name,service_id from dba_services where name = 'server_taf';
NAME SERVICE_ID
---------------------------------------------------------------- ----------
server_taf 7
5.根据service_id审查服务的信息
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'
select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
from dba_services where service_id = 7;
根据service_id审查服务的信息:
SQL> col name format a15
SQL> col failover_method format a11 heading 'METHOD'
SQL> col failover_type format a10 heading 'TYPE'
SQL> col failover_retries format 9999999 heading 'RETRIES'
SQL> col goal format a10
SQL> col clb_goal format a8
SQL> col AQ_HA_NOTIFICATIONS format a5 heading 'AQNOT'
SQL> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
2from dba_services where service_id = 7
3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf NONE NONE 0 NONE LONG NO
SQL>
6.给服务添加server side failover参数
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);
11.2版本可以使用srvctl 修改服务的信息：
srvctl modify service -d RAC -s server_taf -m BASIC -e SELECT -q TRUE -j LONG
给服务添加server side failover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);
PL/SQL procedure successfully completed.
7.再次审查服务可以看到Method, Type和Retries值
select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
from dba_services where service_id = 7;
再次审查服务可以看到Method, Type和Retries值:
SQL> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications 2from dba_services where service_id = 7;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf BASIC SELECT 180 NONE LONG YES
8.检查已注册的服务的监听信息
lsnrctl services
Service "server_taf.za.oracle.com" has 2 instance(s).
Instance "rac1", status READY, has 2 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
REMOTE SERVER
(ADDRESS=(PROTOCOL=TCP)(HOST=dell01)(PORT=1521))
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Instance "rac2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
REMOTE SERVER
(ADDRESS=(PROTOCOL=TCP)(HOST=dell02)(PORT=1521))
我这里版本差异，显示有区别，分别在不同节点显示自己的实例：
--node1:
Service "server_taf" has 1 instance(s).
Instance "jyzhao1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
--node2:
Service "server_taf" has 1 instance(s).
Instance "jyzhao2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
9.创建网络服务名
SERVERTAF =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = dell01)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = dell02)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = server_taf.za.oracle.com)
)
)
服务端RAC所有节点配置tnsnames.ora,添加内容：
SERVERTAF = (DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = jyrac1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = jyrac2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
sqlplus system/oracle@192.168.56.160/server_taf
10.测试TAF功能
select host_name,instance_name from v$instance;
SQL> select instance_name from V$instance;
INSTANCE_NAME
----------------
rac2
SQL> shutdown abort;
ORACLE instance shut down.
select host_name,instance_name from v$instance;
10.1 模拟客户端使用scanVIP测试能否实现TAF
sqlplus system/oracle@192.168.56.160/server_taf
$ sqlplus system/oracle@192.168.56.160/server_taf
SQL*Plus:>
Copyright (c) 1982, 2013, Oracle.All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition>
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> select host_name,instance_name from v$instance;
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1
--这里强制关掉jyzhao1实例。
SQL> /
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac2
jyzhao2
10.1 结论： 可以实现TAF功能，相当于客户端不再需要配置，直接通过SCAN VIP连接。
10.2 模拟客户端使用Public IP测试能否实现TAF
sqlplus system/oracle@192.168.56.150/server_taf
SQL>select host_name,instance_name from v$instance;
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1
--这里强制关掉jyzhao1实例。
SQL> /
select host_name,instance_name from v$instance
*
ERROR at line 1:
ORA-12153: TNS:not connected
Process>
Session>
如果客户端配置tnsnames.ora,将publicIP配置
TAF = (DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.150)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.152)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
再次测试：
$ sqlplus system/oracle@taf
SQL*Plus:>
Copyright (c) 1982, 2013, Oracle.All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition>
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> select host_name,instance_name from v$instance;
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac2
jyzhao2
--这里强制关掉jyzhao2实例。
SQL> /
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1
10.2 结论： 直接连接Public IP无法实现TAF功能。但客户端配置Public IP列表，可以实现。
10.3 模拟客户端使用VIP测试能否实现TAF
sqlplus system/oracle@192.168.56.151/server_taf
$ sqlplus system/oracle@192.168.56.151/server_taf
SQL*Plus:>
Copyright (c) 1982, 2013, Oracle.All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition>
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> select host_name,instance_name from v$instance;
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1
SQL> /
select host_name,instance_name from v$instance
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process>
Session>
如果客户端配置tnsnames.ora，可以通过sqlplus system/oracle@tafvip连接。
TAFVIP = (DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.151)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.153)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
再次测试：
$ sqlplus system/oracle@tafvip
SQL*Plus:>
Copyright (c) 1982, 2013, Oracle.All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition>
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> select host_name,instance_name from v$instance;
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac2
jyzhao2
--这里强制关掉jyzhao2实例。
SQL> /
HOST_NAME
----------------------------------------------------------------
INSTANCE_NAME
----------------
jyrac1
jyzhao1
10.3 结论： 直接连接VIP无法实现TAF功能。但客户端配置VIP列表，可以实现。
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