现在配置如下:node-1[code]listener.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = rac1)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
)
)LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
)
)
)tnsnames.ora:
LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)RAC =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
)
)[/code]node-2[code]listener.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = rac2)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
)
)LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
)
)tnsnames.ora:
LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)RAC =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
)
)[/code]2个node的pfile中都加入了[code]rac1.local_listener = 'LISTENER_RAC1'
rac2.local_listener = 'LISTENER_RAC2'
*.remote_listener = 'LISTENERS_RAC'[/code]客户端tnsnames.ora[code]RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(LOAD_BALANCE = ON)
(FAILOVER = ON)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
(FAILOVER_MODE = (TYPE = SELECT)(METHOD = BASIC))
)
)[/code]现在在客户端用sqlplus连接, 查询instance_name一直是rac1, 请问哪里配置的不对~~, 要实现load balance 和 failover, 该如何配置, 万分感谢
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = rac1)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
)
)LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
)
)
)tnsnames.ora:
LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)RAC =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
)
)[/code]node-2[code]listener.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = rac2)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
)
)LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
)
)tnsnames.ora:
LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)RAC =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
)
)[/code]2个node的pfile中都加入了[code]rac1.local_listener = 'LISTENER_RAC1'
rac2.local_listener = 'LISTENER_RAC2'
*.remote_listener = 'LISTENERS_RAC'[/code]客户端tnsnames.ora[code]RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(LOAD_BALANCE = ON)
(FAILOVER = ON)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
(FAILOVER_MODE = (TYPE = SELECT)(METHOD = BASIC))
)
)[/code]现在在客户端用sqlplus连接, 查询instance_name一直是rac1, 请问哪里配置的不对~~, 要实现load balance 和 failover, 该如何配置, 万分感谢
listener.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = rac1)
(ORACLE_HOME = /u01/app/oracle/product/9.2.0)
)
)LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
)
)
)tnsnames.ora:
LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)RAC =
(DESCRIPTION =
(LOAD_BALANCE = yes)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
)
)node-2 与node-1基本相同, 除了几处sid和host外
rac2.local_listener = 'LISTENER_RAC2'
*.remote_listener = 'LISTENERS_RAC'客户端tnsnames.ora:
RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node-1)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = node-2)(PORT = 1521))
)
(LOAD_BALANCE = ON)
(FAILOVER = ON)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = rac)
(FAILOVER_MODE = (TYPE = SELECT)(METHOD = BASIC))
)
)
SQL> show parameter listenerNAME TYPE VALUE
------------------------------------ ----------- ------------------------------
local_listener string LISTENER_RAC1
mts_listener_address string
mts_multiple_listeners boolean FALSE
remote_listener string LISTENERS_RACrac2:SQL> show parameter listenerNAME TYPE VALUE
------------------------------------ ----------- ------------------------------
local_listener string LISTENER_RAC2
mts_listener_address string
mts_multiple_listeners boolean FALSE
remote_listener string LISTENERS_RAC
rac3:
SQL> show parameter listenerNAME TYPE VALUE
------------------------------------ ----------- ------------------------------
local_listener string LISTENER_RAC3
mts_listener_address string
mts_multiple_listeners boolean FALSE
remote_listener string LISTENERS_RAC
tnsnames:rac1:
# Generated by Oracle configuration tools.LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
)
RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)RAC3 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac3)
)
)LISTENER_RAC1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
)
)RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVICE_NAME = rac)
)
)
failover =
(DESCRIPTION =
(enable=broken)
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.81)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.82)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.83)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(failover_mode=(type=select)(method=basic))
)
)
-----------------------------------------------------rac2:tnsnames
# Generated by Oracle configuration tools.LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
)LISTENER_RAC2 =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)
RAC3 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac3)
)
)
RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
)
)RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVICE_NAME = rac)
)
)
failover =
(DESCRIPTION =
(enable=broken)
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.81)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.82)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.83)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(failover_mode=(type=select)(method=basic))
)
)--------------------------------------------
rac3:tnsnames.
# Generated by Oracle configuration tools.LISTENERS_RAC =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
)LISTENER_RAC3 =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
RAC2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac2)
)
)
RAC3 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac3)
)
)
RAC1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(INSTANCE_NAME = rac1)
)
)INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
)
)RAC =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
(LOAD_BALANCE = yes)
)
(CONNECT_DATA =
(SERVICE_NAME = rac)
)
)
failover =
(DESCRIPTION =
(enable=broken)
(LOAD_BALANCE = yes)
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.81)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.82)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.83)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = rac)
(failover_mode=(type=select)(method=basic))
)
)====================================================================listener.orarac1.# Generated by Oracle configuration tools.LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = IBSSAPP)(PORT = 1521))
)
)
)SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(PROGRAM = extproc)
)
(SID_DESC =
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(SID_NAME = rac1)
)
)
-------------------------------------------------------------rac2.# Generated by Oracle configuration tools.LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBASAPP)(PORT = 1521))
)
)
)SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(PROGRAM = extproc)
)
(SID_DESC =
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(SID_NAME = rac2)
)
)----------------------------------------------
rac3.# Generated by Oracle configuration tools.LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = LBAS)(PORT = 1521))
)
)
)SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(PROGRAM = extproc)
)
(SID_DESC =
(ORACLE_HOME = /oracle/rac/oracle/ora9i/app/oracle/product/902)
(SID_NAME = rac3)
)
)
==========================================================client:
ractest =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.81)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.82)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.17.36.83)(PORT = 1521))
)
(LOAD_BALANCE = ON)
(FAILOVER = ON)
(CONNECT_DATA =
(SERVICE_NAME = rac)
(FAILOVER_METHOD =
(TYPE = SESSION)
(METHOD = BASIC)
)
)
)