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實(shí)驗(yàn)環(huán)境：Oracle 11.2.0.4 RAC
參考MOS文檔：
How To Configure Server Side Transparent Application Failover (文檔 ID 460982.1)
1.為設(shè)置TAF在RAC集群上新建服務(wù)
2.啟動(dòng)server_taf服務(wù)
3.檢查確認(rèn)服務(wù)正在運(yùn)行
4.找到剛創(chuàng)建服務(wù)的service_id
5.根據(jù)service_id審查服務(wù)的信息
6.給服務(wù)添加server side failover參數(shù)
7.再次審查服務(wù)可以看到Method, Type和Retries值
8.檢查已注冊(cè)的服務(wù)的監(jiān)聽(tīng)信息
9.創(chuàng)建網(wǎng)絡(luò)服務(wù)名
10.測(cè)試TAF功能
eg: srvctl add service -d rac -s server_taf -r "rac1,rac2" -P BASIC
使用oracle用戶(hù)在RAC集群上新建服務(wù)server_taf:
[oracle@jyrac1 ~]$ srvctl add service -d jyzhao -s server_taf -r "jyzhao1,jyzhao2" -P BASIC [oracle@jyrac1 ~]$
注意不能使用grid用戶(hù)操作，如果使用grid 用戶(hù)執(zhí)行的話(huà)，會(huì)報(bào)錯(cuò):
[grid@jyrac1 ~]$ 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"
eg: srvctl start service -d rac -s server_taf
啟動(dòng)server_taf服務(wù)
[oracle@jyrac1 ~]$ srvctl start service -d jyzhao -s server_taf
eg: srvctl config service -d rac
檢查確認(rèn)服務(wù)正在運(yùn)行:
[oracle@jyrac1 ~]$ 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:
eg: select name,service_id from dba_services where name = 'server_taf';
找到剛創(chuàng)建服務(wù)的service_id
SQL> select name,service_id from dba_services where name = 'server_taf'; NAME SERVICE_ID ---------------------------------------------------------------- ---------- server_taf 7
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;
根據(jù)service_id審查服務(wù)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 2 from dba_services where service_id = 7 3 ; NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT --------------- ----------- ---------- -------- ---------- -------- ----- server_taf NONE NONE 0 NONE LONG NO 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);
11.2版本可以使用srvctl 修改服務(wù)的信息：
srvctl modify service -d RAC -s server_taf -m BASIC -e SELECT -q TRUE -j LONG
給服務(wù)添加server side failover參數(shù):
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.
select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications
from dba_services where service_id = 7;
再次審查服務(wù)可以看到Method, Type和Retries值:
SQL> select name, failover_method, failover_type, failover_retries,goal, clb_goal,aq_ha_notifications 2 from dba_services where service_id = 7; NAME METHOD TYPE RETRIES GOAL CLB_GOAL AQNOT --------------- ----------- ---------- -------- ---------- -------- ----- server_taf BASIC SELECT 180 NONE LONG YES
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))
我這里版本差異，顯示有區(qū)別，分別在不同節(jié)點(diǎn)顯示自己的實(shí)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
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)
)
)
服務(wù)端RAC所有節(jié)點(diǎn)配置tnsnames.ora,添加內(nèi)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
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$instance;
10.1 模擬客戶(hù)端使用scanVIP測(cè)試能否實(shí)現(xiàn)TAF
sqlplus system/oracle@192.168.56.160/server_taf
[grid@jyrac1 ~]$ sqlplus system/oracle@192.168.56.160/server_taf SQL*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 02:59:53 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 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$instance; HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac1 jyzhao1 --這里強(qiáng)制關(guān)掉jyzhao1實(shí)例。 SQL> / HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac2 jyzhao2
10.1 結(jié)論： 可以實(shí)現(xiàn)TAF功能，相當(dāng)于客戶(hù)端不再需要配置，直接通過(guò)SCAN VIP連接。
10.2 模擬客戶(hù)端使用Public IP測(cè)試能否實(shí)現(xiàn)TAF
sqlplus system/oracle@192.168.56.150/server_taf
SQL> select host_name,instance_name from v$instance; HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac1 jyzhao1 --這里強(qiáng)制關(guān)掉jyzhao1實(shí)例。 SQL> / select host_name,instance_name from v$instance * ERROR at line 1: ORA-12153: TNS:not connected Process ID: 20116 Session ID: 24 Serial number: 7
如果客戶(hù)端配置tnsnames.ora,將publicIP配置
TAF = (DESCRIPTION = (LOAD_BALANCE = yes) (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.150)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.152)(PORT = 1521)) (CONNECT_DATA = (SERVICE_NAME = server_taf) ) )
再次測(cè)試：
[oracle@jyrac2 admin]$ sqlplus system/oracle@taf SQL*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 05:11:30 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 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$instance; HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac2 jyzhao2 --這里強(qiáng)制關(guān)掉jyzhao2實(shí)例。 SQL> / HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac1 jyzhao1
10.2 結(jié)論： 直接連接Public IP無(wú)法實(shí)現(xiàn)TAF功能。但客戶(hù)端配置Public IP列表，可以實(shí)現(xiàn)。
10.3 模擬客戶(hù)端使用VIP測(cè)試能否實(shí)現(xiàn)TAF
sqlplus system/oracle@192.168.56.151/server_taf
[grid@jyrac1 ~]$ sqlplus system/oracle@192.168.56.151/server_taf SQL*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 04:32:20 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 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 ID: 32459 Session ID: 159 Serial number: 3
如果客戶(hù)端配置tnsnames.ora，可以通過(guò)sqlplus system/oracle@tafvip連接。
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) ) )
再次測(cè)試：
[oracle@jyrac2 admin]$ sqlplus system/oracle@tafvip SQL*Plus: Release 11.2.0.4.0 Production on Fri Mar 10 05:15:32 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 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 --這里強(qiáng)制關(guān)掉jyzhao2實(shí)例。 SQL> / HOST_NAME ---------------------------------------------------------------- INSTANCE_NAME ---------------- jyrac1 jyzhao1
10.3 結(jié)論： 直接連接VIP無(wú)法實(shí)現(xiàn)TAF功能。但客戶(hù)端配置VIP列表，可以實(shí)現(xiàn)。
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