oracle 11G 客户端连接数据库 SCAN 和 TAF的方式和区别
2018-03-07 15:43
441 查看
一、客户端通过SCAN IP连接数据库
客户端配置：
[html] view plain copy 214 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.214)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@214 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接断开，需要重新连接数据库来实现故障转移
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-03113: 通信通道的文件结尾
进程 ID: 12874
会话 ID: 50 序列号: 49
SQL> select host_name,instance_name from v$instance;
ERROR:
ORA-03114: 未连接到 ORACLE
SQL> exit
C:\Users\zylong>sqlplus sys/oracle@214 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
二、客户端通过VIP连接数据库 客户端配置：
[html] view plain copy 212-213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
注：
客户端连接会一直连上面的IP（212），后面不管开多少个连接都会连到第一个IP（212）上
当客户端连接一个实例后，如果这个实例挂掉，客户端不能自动切换到另一个节点，需要客户端断掉后重新连接才能连接到另一个节点
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212-213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接断开，需要重新连接数据库来实现故障转移
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-03113: 通信通道的文件结尾
进程 ID: 14841
会话 ID: 35 序列号: 11
SQL> select host_name,instance_name from v$instance;
ERROR:
ORA-03114: 未连接到 ORACLE
SQL> exit
C:\Users\zylong>sqlplus sys/oracle@212-213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
三、客户端通过Client Side TAF连接数据库,使用BASIC方式
客户端配置：
[html] view plain copy 212_213 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(LOAD_BALANCE = on)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD =basic)
(RETRIES=180)
(DELAY=5)
)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212_213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，但是会出现报错，接着转移到其他实例上。 其实这个地方的切换连接会慢一点，但是不需要客户端重新连接。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-25408: 无法安全重放调用
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
四、客户端通过Client Side TAF连接数据库,使用preconnect方式
客户端配置：
[html] view plain copy 212_213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD = preconnect)
(BACKUP = 212213)
)
)
)
212213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD = preconnect)
(BACKUP = 212_213)
)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212_213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，但是会出现报错，接着转移到其他实例上。
其实这个地方的切换连接会非常快，并且不需要客户端重新连接，但是需要消耗数据库连接数
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-25408: 无法安全重放调用
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
关于Client Side TAF配置Preconnect方式可以参考：
How to Configure Client Side Transparent Application Failover with Preconnect Option (文档 ID 802434.1)
五、客户端通过Server Side TAF连接数据库,只能使用BASIC方式
在server端配置TAF
[html] view plain copy 添加服务
[oracle@0906rac2 ~]$ srvctl add service -d orcl -s server_taf -r "orcl1,orcl2" -P BASIC
启动服务
[grid@0906rac1 ~]$ srvctl start service -d orcl -s server_taf
查看服务状态
[grid@0906rac1 ~]$ crsctl stat res -t
--------------------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.ARCH.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.CRS.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.DATA.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.LISTENER.lsnr
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.asm
ONLINE ONLINE 0906rac1 Started
ONLINE ONLINE 0906rac2 Started
ora.gsd
OFFLINE OFFLINE 0906rac1
OFFLINE OFFLINE 0906rac2
ora.net1.network
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.ons
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.registry.acfs
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.0906rac1.vip
1 ONLINE ONLINE 0906rac1
ora.0906rac2.vip
1 ONLINE ONLINE 0906rac2
ora.LISTENER_SCAN1.lsnr
1 ONLINE ONLINE 0906rac1
ora.cvu
1 ONLINE ONLINE 0906rac1
ora.oc4j
1 ONLINE ONLINE 0906rac1
ora.orcl.db
1 ONLINE ONLINE 0906rac1 Open
2 ONLINE ONLINE 0906rac2 Open
ora.orcl.server_taf.svc
1 ONLINE ONLINE 0906rac1
2 ONLINE ONLINE 0906rac2
ora.scan1.vip
1 ONLINE ONLINE 0906rac1
[html] view plain copy SQL> show parameter service
NAME TYPE VALUE
--------------------- ----------- -------------
service_names string server_taf
SQL> select name,service_id from dba_services where name = 'server_taf';
NAME SERVICE_ID
------------------------------ ----------
server_taf 3
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 = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf NONE NONE 0 NONE LONG NO
配置参数
begin
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);
end;
/
删除方法
begin
DBMS_SERVICE.DELETE_SERVICE('server_taf');
end;
/
11G R2需要修改service配置
[html] view plain copy [oracle@0906rac2 ~]$ srvctl modify service -d ORCL -s server_taf -m BASIC -e SELECT -q TRUE -j LONG
[oracle@0906rac2 ~]$ 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: true
Failover type: SELECT
Failover method: BASIC
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:
[html] view plain copy 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 = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf BASIC SELECT 0 NONE LONG YES
如果不生效，重新配置参数
SQL> begin
2 dbms_service.modify_service (
3 service_name => 'server_taf',
4 aq_ha_notifications => true,
5 failover_method => dbms_service.failover_method_basic,
6 failover_type => dbms_service.failover_type_select,
7 failover_retries => 180,
8 failover_delay => 5,
9 clb_goal => dbms_service.clb_goal_long);
10 end;
11 /
PL/SQL procedure successfully completed.
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 from dba_services where service_id = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf BASIC SELECT 180 NONE LONG YES
查看service监听状态
[html] view plain copy [oracle@0906rac2 ~]$ lsnrctl services
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 18-OCT-2016 16:15:47
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orcl" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orclXDB" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: 0906rac2, pid: 15756>
(ADDRESS=(PROTOCOL=tcp)(HOST=0906rac2)(PORT=19341))
Service "server_taf" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
客户端配置，使用VIP：
[html] view plain copy SERVER_TAF =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus system/oracle@server_taf
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，也不会出现报错，使用BASIC方式转移到其他实例上。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
客户端配置，使用SCAN IP：
[html] view plain copy SCAN_TAF =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.214)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus system/oracle@SCAN_TAF
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，也不会出现报错，使用BASIC方式转移到其他实例上。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
关于Server Side TAF配置可以参考： How To Configure Server Side Transparent Application Failover (文档 ID 460982.1)
但是Server Side TAF不能使用sqlplus sys/oracle@server_taf as sysdba 实现透明切换，如果要实现，需要特殊配置：
SYSDBA Sessions Do Not Failover with SRVCTL TAF Configured (文档 ID 1342992.1)
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@server_taf as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
SQL> shutdown abort
ORACLE instance shut down.
SQL> select host_name,instance_name from v$instance;
select host_name,instance_name from v$instance
*
第 1 行出现错误:
ORA-03113: 通信通道的文件结尾
进程 ID: 30737
会话 ID: 32 序列号: 15
另外需要注意，Oracle JDBC thin驱动程序不支持TAF。 TAF仅受JDBC OCI驱动程序支持。 Is Transparent Application Failover (TAF) Supported on the JDBC Thin Driver? (文档 ID 297490.1)
WebLogic Server（WLS）使用Oracle Thin驱动程序，而不是OCI驱动程序，不支持TAF。
Does WebLogic Server (WLS) Support Oracle RAC with TAF? (文档 ID 950174.1)
使用JDBC OCI的配置方式，参考:
How to Setup SQL Developer to support Transparent Application Failover (TAF) (文档 ID 1389747.1)
客户端配置：
[html] view plain copy 214 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.214)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@214 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接断开，需要重新连接数据库来实现故障转移
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-03113: 通信通道的文件结尾
进程 ID: 12874
会话 ID: 50 序列号: 49
SQL> select host_name,instance_name from v$instance;
ERROR:
ORA-03114: 未连接到 ORACLE
SQL> exit
C:\Users\zylong>sqlplus sys/oracle@214 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
二、客户端通过VIP连接数据库 客户端配置：
[html] view plain copy 212-213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
注：
客户端连接会一直连上面的IP（212），后面不管开多少个连接都会连到第一个IP（212）上
当客户端连接一个实例后，如果这个实例挂掉，客户端不能自动切换到另一个节点，需要客户端断掉后重新连接才能连接到另一个节点
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212-213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接断开，需要重新连接数据库来实现故障转移
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-03113: 通信通道的文件结尾
进程 ID: 14841
会话 ID: 35 序列号: 11
SQL> select host_name,instance_name from v$instance;
ERROR:
ORA-03114: 未连接到 ORACLE
SQL> exit
C:\Users\zylong>sqlplus sys/oracle@212-213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
三、客户端通过Client Side TAF连接数据库,使用BASIC方式
客户端配置：
[html] view plain copy 212_213 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(LOAD_BALANCE = on)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD =basic)
(RETRIES=180)
(DELAY=5)
)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212_213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，但是会出现报错，接着转移到其他实例上。 其实这个地方的切换连接会慢一点，但是不需要客户端重新连接。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-25408: 无法安全重放调用
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
四、客户端通过Client Side TAF连接数据库,使用preconnect方式
客户端配置：
[html] view plain copy 212_213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD = preconnect)
(BACKUP = 212213)
)
)
)
212213 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = session)
(METHOD = preconnect)
(BACKUP = 212_213)
)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@212_213 as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
实例orcl2发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，但是会出现报错，接着转移到其他实例上。
其实这个地方的切换连接会非常快，并且不需要客户端重新连接，但是需要消耗数据库连接数
[html] view plain copy SQL> select host_name,instance_name from v$instance;
ORA-25408: 无法安全重放调用
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
关于Client Side TAF配置Preconnect方式可以参考：
How to Configure Client Side Transparent Application Failover with Preconnect Option (文档 ID 802434.1)
五、客户端通过Server Side TAF连接数据库,只能使用BASIC方式
在server端配置TAF
[html] view plain copy 添加服务
[oracle@0906rac2 ~]$ srvctl add service -d orcl -s server_taf -r "orcl1,orcl2" -P BASIC
启动服务
[grid@0906rac1 ~]$ srvctl start service -d orcl -s server_taf
查看服务状态
[grid@0906rac1 ~]$ crsctl stat res -t
--------------------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.ARCH.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.CRS.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.DATA.dg
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.LISTENER.lsnr
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.asm
ONLINE ONLINE 0906rac1 Started
ONLINE ONLINE 0906rac2 Started
ora.gsd
OFFLINE OFFLINE 0906rac1
OFFLINE OFFLINE 0906rac2
ora.net1.network
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.ons
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
ora.registry.acfs
ONLINE ONLINE 0906rac1
ONLINE ONLINE 0906rac2
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.0906rac1.vip
1 ONLINE ONLINE 0906rac1
ora.0906rac2.vip
1 ONLINE ONLINE 0906rac2
ora.LISTENER_SCAN1.lsnr
1 ONLINE ONLINE 0906rac1
ora.cvu
1 ONLINE ONLINE 0906rac1
ora.oc4j
1 ONLINE ONLINE 0906rac1
ora.orcl.db
1 ONLINE ONLINE 0906rac1 Open
2 ONLINE ONLINE 0906rac2 Open
ora.orcl.server_taf.svc
1 ONLINE ONLINE 0906rac1
2 ONLINE ONLINE 0906rac2
ora.scan1.vip
1 ONLINE ONLINE 0906rac1
[html] view plain copy SQL> show parameter service
NAME TYPE VALUE
--------------------- ----------- -------------
service_names string server_taf
SQL> select name,service_id from dba_services where name = 'server_taf';
NAME SERVICE_ID
------------------------------ ----------
server_taf 3
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 = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf NONE NONE 0 NONE LONG NO
配置参数
begin
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);
end;
/
删除方法
begin
DBMS_SERVICE.DELETE_SERVICE('server_taf');
end;
/
11G R2需要修改service配置
[html] view plain copy [oracle@0906rac2 ~]$ srvctl modify service -d ORCL -s server_taf -m BASIC -e SELECT -q TRUE -j LONG
[oracle@0906rac2 ~]$ 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: true
Failover type: SELECT
Failover method: BASIC
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:
[html] view plain copy 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 = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf BASIC SELECT 0 NONE LONG YES
如果不生效，重新配置参数
SQL> begin
2 dbms_service.modify_service (
3 service_name => 'server_taf',
4 aq_ha_notifications => true,
5 failover_method => dbms_service.failover_method_basic,
6 failover_type => dbms_service.failover_type_select,
7 failover_retries => 180,
8 failover_delay => 5,
9 clb_goal => dbms_service.clb_goal_long);
10 end;
11 /
PL/SQL procedure successfully completed.
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 from dba_services where service_id = 3;
NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT
--------------- ----------- ---------- -------- ---------- -------- -----
server_taf BASIC SELECT 180 NONE LONG YES
查看service监听状态
[html] view plain copy [oracle@0906rac2 ~]$ lsnrctl services
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 18-OCT-2016 16:15:47
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orcl" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "orclXDB" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: 0906rac2, pid: 15756>
(ADDRESS=(PROTOCOL=tcp)(HOST=0906rac2)(PORT=19341))
Service "server_taf" has 1 instance(s).
Instance "orcl2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
客户端配置，使用VIP：
[html] view plain copy SERVER_TAF =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.212)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.213)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus system/oracle@server_taf
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，也不会出现报错，使用BASIC方式转移到其他实例上。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
客户端配置，使用SCAN IP：
[html] view plain copy SCAN_TAF =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.16.214)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = server_taf)
)
)
客户端连接
[html] view plain copy C:\Users\zylong>sqlplus system/oracle@SCAN_TAF
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
实例orcl1发生故障
[html] view plain copy SQL> shutdown abort
ORACLE instance shut down.
此时客户端的连接不会断开，也不会出现报错，使用BASIC方式转移到其他实例上。
[html] view plain copy SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac2 orcl2
关于Server Side TAF配置可以参考： How To Configure Server Side Transparent Application Failover (文档 ID 460982.1)
但是Server Side TAF不能使用sqlplus sys/oracle@server_taf as sysdba 实现透明切换，如果要实现，需要特殊配置：
SYSDBA Sessions Do Not Failover with SRVCTL TAF Configured (文档 ID 1342992.1)
[html] view plain copy C:\Users\zylong>sqlplus sys/oracle@server_taf as sysdba
SQL> select host_name,instance_name from v$instance;
HOST_NAME INSTANCE_NAME
------------------------- ----------------
0906rac1 orcl1
SQL> shutdown abort
ORACLE instance shut down.
SQL> select host_name,instance_name from v$instance;
select host_name,instance_name from v$instance
*
第 1 行出现错误:
ORA-03113: 通信通道的文件结尾
进程 ID: 30737
会话 ID: 32 序列号: 15
另外需要注意，Oracle JDBC thin驱动程序不支持TAF。 TAF仅受JDBC OCI驱动程序支持。 Is Transparent Application Failover (TAF) Supported on the JDBC Thin Driver? (文档 ID 297490.1)
WebLogic Server（WLS）使用Oracle Thin驱动程序，而不是OCI驱动程序，不支持TAF。
Does WebLogic Server (WLS) Support Oracle RAC with TAF? (文档 ID 950174.1)
使用JDBC OCI的配置方式，参考:
How to Setup SQL Developer to support Transparent Application Failover (TAF) (文档 ID 1389747.1)
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