oracle一个实例配置多个listener或多个端口

istener.ora文件的内容如下:

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = jingyong)
      (ORACLE_HOME =/u01/app/oracle/product/10.2.0/db)
      (SID_NAME = jingyong)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1521))
    )
  )

上面的配置只配置了一个listener

下面再增加一个listener_2

SID_LIST_LISTENER_2 =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = jingyong)
      (ORACLE_HOME =/u01/app/oracle/product/10.2.0/db)
      (SID_NAME = jingyong)
    )
  )

LISTENER_2 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1522))
    )
  )

SID_LIST_ 这里的要和LISTENER名称一致。
SID_DESC则注册要提供服务的数据库实例名。这样LISTENER2 才能够提供服务。

再来启动两个listener

[oracle@jingyong udump]$ lsnrctl stop listener

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 13-JAN-2013 18:06:21

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=jingyong)(PORT=1521)))
The command completed successfully
[oracle@jingyong udump]$ lsnrctl start listener_2

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 13-JAN-2013 18:06:37

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db/network/log/listener_2.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=jingyong)(PORT=1522)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=jingyong)(PORT=1522)))
STATUS of the LISTENER
------------------------
Alias                     listener_2
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                13-JAN-2013 18:06:37
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/10.2.0/db/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/10.2.0/db/network/log/listener_2.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=jingyong)(PORT=1522)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "jingyong" has 1 instance(s).
  Instance "jingyong", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@jingyong udump]$ lsnrctl start listener

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 13-JAN-2013 18:06:41

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=jingyong)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=jingyong)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     listener
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                13-JAN-2013 18:06:41
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/10.2.0/db/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/10.2.0/db/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=jingyong)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "jingyong" has 1 instance(s).
  Instance "jingyong", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

一个oracle实例对于多个监听，一个监听对于多个端口。
现在我们可以创建一个oracle实例一个监听的两个端口。这一共有两种方法：
在listener文件添加一行，具体如下：

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1522))
    )
  )

这时我们只有重启监听，就可以用两个端口连接数据库实例了。。。。
当然我们也可以一个实例启动两个监听，但是具体只有一个监听起作用。
我们可以在一个数据库下，一个实例对于一个监听，但实例必须在不同目录。或者先建监听，再建实例。一样能达到效果。。。
具体配置如下：

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = jingyong)
      (ORACLE_HOME =/u01/app/oracle/product/10.2.0/db)
      (SID_NAME = jingyong)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1521))
    )
  )

SID_LIST_LISTENER_2 =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = jingyong)
      (ORACLE_HOME =/u01/app/oracle/product/10.2.0/db)
      (SID_NAME = jingyong)
    )
  )

LISTENER_2 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1522))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = jingyong)(PORT = 1523))
    )
  )