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导读数据库,简而言之可视为电子化的文件柜——存储电子文件的处所,用户可以对文件中的数据进行新增、截取、更新、删除等操作。所谓“数据库”是以一定方式储存在一起、能与多个用户共享、具有尽可能小的冗余度、与应... 数据库,简而言之可视为电子化的文件柜——存储电子文件的处所,用户可以对文件中的数据进行新增、截取、更新、删除等操作。所谓“数据库”是以一定方式储存在一起、能与多个用户共享、具有尽可能小的冗余度、与应用程序彼此独立的数据集合。 问题:一台机器同时装两套数据库时(实例名o8161,o8151),无法同时启动两个listener,当启动第二个listener时,显示错误。
$ lsnrctl start
LSNRCTL for IBM/AIX RISC System/6000: Version 8.1.5.0.0 - Production on 14-SEP-00 09:25:17
(c) Copyright 1998 Oracle Corporation. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
$ oerr tns 1106 01106, 00000, "Listener using listener name %s has already been started" // *Cause: Another listener is already listening on one of the ADDRESSes // specified. // *Action: Shutdown the previous listener specified by the listener name // before starting this one.
问题产生原因: 两个实例的LISTENER.ORA中IPC协议的KEY是相同,而一个系统中KEY必须是唯一的.
解决办法: 修改key的值即可。修改后的文件信息:
o8161实例:(没有修改)
# LISTENER.ORA Configuration File:/oracle/dbs/opstemp/szpcac1/network/admin/listener.ora # Generated by Oracle configuration tools.
LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = loopback)(PORT = 1521)) ) ) (DESCRIPTION = (PROTOCOL_STACK = (PRESENTATION = GIOP) (SESSION = RAW) ) (ADDRESS = (PROTOCOL = TCP)(HOST = loopback)(PORT = 2481)) ) )
SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = /oracle) (PROGRAM = extproc) ) (SID_DESC = (ORACLE_HOME = /oracle) (SID_NAME = o8161) ) )
08151实例:(经过修改)
# LISTENER.ORA Configuration File:/ora815/network/admin/listener.ora # Generated by Oracle Net8 Assistant
LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = TESTo815)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = loopback)(PORT = 1526)) ) ) )
SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = ora8151) (ORACLE_HOME = /ora815) (PROGRAM = extproc) ) )
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