要想給一個(gè)Oracle實(shí)例配置多個(gè)監(jiān)聽，首先要定義多個(gè)監(jiān)聽器，因?yàn)槭嵌鄠€(gè)監(jiān)聽，勢(shì)必會(huì)有一些監(jiān)聽端口不是1521.

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現(xiàn)在服務(wù)端的listener.ora文件中定義如下監(jiān)聽器:
[oracle@wang admin]$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LI =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = wang)(PORT = 1522))
    )
  )
[oracle@wang admin]$
注意：
Because all of the configuration parameters have default values, it is possible to start and use a listener with no configuration. This default listener has a name of LISTENER, supports no services on startup, and listens on the following TCP/IP protocol address: (ADDRESS=(PROTOCOL=tcp)(HOST=host_name)(PORT=1521))
這句話就能解釋，即使是在沒有l(wèi)istener.ora文件的情況下，也會(huì)可以啟動(dòng)名為LISTENER的監(jiān)聽來監(jiān)聽1521端口。

一個(gè)監(jiān)聽1521端口的默認(rèn)監(jiān)聽器，一個(gè)監(jiān)聽1522端口的監(jiān)聽器LI. 到現(xiàn)在我們還沒有給這兩個(gè)監(jiān)聽器配置相應(yīng)的Oracle服務(wù).

監(jiān)聽器與Oracle服務(wù)關(guān)聯(lián)有兩種方式，靜態(tài)注冊(cè)和動(dòng)態(tài)注冊(cè).

• 動(dòng)態(tài)注冊(cè)

 動(dòng)態(tài)注冊(cè)只能注冊(cè)到默認(rèn)的1521端口,而這里我們需要一次性的動(dòng)態(tài)注冊(cè)到兩個(gè)端口，因?yàn)樾枰褂胠ocal_listener.

先在服務(wù)端的tnsnames.ora文件里加入一個(gè)描述對(duì)象L,具體叫什么其實(shí)都無所謂的.然后會(huì)把它賦值給local_listner,這樣Pmon才知道往那些指定的IP和端口發(fā)送注冊(cè)請(qǐng)求.

動(dòng)態(tài)注冊(cè)的時(shí)候,PMon會(huì)到tnsnames.ora里面查找描述對(duì)象的具體信息,
L =
  (
    DESCRIPTION =
    (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.12)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.12)(PORT = 1522))
    )
  )

SQL> alter system set local_listener='l';
System altered.

其實(shí)local_listener也接受直接的地址描述或者地址描述列表.
SQL>  alter system set local_listener=' (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.12)(PORT = 1522))';

-更改local_listener后，原來注冊(cè)的服務(wù)會(huì)取消，然后PMON每隔一分鐘重參試注冊(cè)到新地址.下面我們手動(dòng)觸發(fā)注冊(cè).

SQL> alter system register; --注冊(cè)到新的local_listener

System altered.
SQL>  alter system set local_listener='(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.12)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.12)(PORT = 1522))))';--同時(shí)注冊(cè)到1521 和1522 端口.

System altered.

SQL> alter system register;

System altered.

--查看監(jiān)聽狀態(tài)：
[oracle@wang admin]$ lsnrctl status li
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 06-FEB-2018 18:47:13
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=wang)(PORT=1522)))
STATUS of the LISTENER
------------------------
Alias                     li
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                06-FEB-2018 17:38:09
Uptime                    0 days 1 hr. 9 min. 3 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/wang/li/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wang)(PORT=1522)))
Services Summary...
Service "DBdb" has 1 instance(s).
  Instance "DBdb", status READY, has 1 handler(s) for this service...
Service "DBdbXDB" has 1 instance(s).
  Instance "DBdb", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@wang admin]$
[oracle@wang admin]$
[oracle@wang admin]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 06-FEB-2018 18:47:17
Copyright (c) 1991, 2013, Oracle.  All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                06-FEB-2018 17:38:04
Uptime                    0 days 1 hr. 9 min. 12 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/wang/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wang)(PORT=1521)))
Services Summary...
Service "DBdb" has 1 instance(s).
  Instance "DBdb", status READY, has 1 handler(s) for this service...
Service "DBdbXDB" has 1 instance(s).
  Instance "DBdb", status READY, has 1 handler(s) for this service...
The command completed successfully
[oracle@wang admin]$

動(dòng)態(tài)注冊(cè)的服務(wù)名為service_name.db_domain,

• 靜態(tài)注冊(cè)

在服務(wù)端的listener.ora里對(duì)監(jiān)聽器LI配置靜態(tài)的服務(wù)名稱和實(shí)例名，下面沒有列出默認(rèn)監(jiān)聽器的配置.

此時(shí)的默認(rèn)監(jiān)聽器還是監(jiān)聽在1521端口的，而且沒有設(shè)置local_listener
(alter system reset local_listener 可以把local_listener還原成默認(rèn)值).

所以Pmon會(huì)默認(rèn)注冊(cè)到默認(rèn)監(jiān)聽器的.

因此我們只需要在給監(jiān)聽在1522端口的LI配置靜態(tài)服務(wù)，這樣就有兩個(gè)監(jiān)聽器為我們的實(shí)例服務(wù)了.
配置如下：

[oracle@wang admin]$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LI =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = wang)(PORT = 1522))
    )
  )
SID_LIST_LI=
   (SID_LIST=
     (SID_DESC=
       (GLOBAL_DBNAME=DBdb)
       (ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1)
       (SID_NAME=DBdb)
     )
    )
[oracle@wang admin]$

名稱欄目：Oracle一個(gè)實(shí)例配置多個(gè)監(jiān)聽-創(chuàng)新互聯(lián)
鏈接URL：http://www.chinadenli.net/article38/docpsp.html

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