【OracleDatabase】数据库监听与连接
服务名 --根据业务需求修改 [oracle@wallet01 ~]$ sqlplus / as sysdba SQL> show parameter service_names; NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ service_names string wallet 实例名 --允许修改不建议修改 SQL> show parameter instance_name NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ instance_name string wallet 数据库名 --不允许修改 SQL> show parameter db_name NAME TYPE VALUE ------------------------------------ --------------------------------- ------------------------------ db_name string wallet 监听器 [oracle@wallet01 ~]$ cd $ORACLE_HOME/network/admin [oracle@wallet01 admin]$ 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. LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = wallet01)(PORT = 1521)) --协议，主机，端口 ) ) ADR_BASE_LISTENER = /u01/app/oracle [oracle@wallet01 ~]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 09-MAY-2019 10:43:13 Copyright (c) 1991, 2013, Oracle. All rights reserved. Starting /u01/app/oracle/product/11.2.0/db_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.4.0 - Production System parameter file is /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/wallet01/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wallet01)(PORT=1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=wallet01)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 09-MAY-2019 10:43:13 Uptime 0 days 0 hr. 0 min. 5 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/wallet01/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wallet01)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) The listener supports no services The command completed successfully [oracle@wallet01 ~]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 09-MAY-2019 10:44:44 Copyright (c) 1991, 2013, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=wallet01)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 09-MAY-2019 10:43:13 Uptime 0 days 0 hr. 1 min. 31 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/wallet01/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wallet01)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "wallet" has 1 instance(s). Instance "wallet", status READY, has 1 handler(s) for this service... Service "walletXDB" has 1 instance(s). Instance "wallet", status READY, has 1 handler(s) for this service... The command completed successfully 客户端（本地命名方式） [oracle@wallet02 ~]$ cd $ORACLE_HOME/network/admin [oracle@wallet02 admin]$ cat tnsnames.ora # tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora # Generated by Oracle configuration tools. wallet = --连接字符串（网络服务名）根据业务需求修改 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.201)(PORT = 1521)) --协议，主机，端口 (CONNECT_DATA = (SERVER = DEDICATED) --专用服务器模式 (SERVICE_NAME = wallet) --与服务名保持一致 ) ) [oracle@wallet02 ~]$ sqlplus sys/oracle@wallet as sysdba --用户名/密码@连接字符串（网络服务名） SQL*Plus: Release 11.2.0.4.0 Production on Fri Jun 29 10:06:52 2018 Copyright (c) 1982, 2009, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> select * from dual; DUM --- X 总结：listener.ora文件中的协议，主机，端口，与通过PMON动态注册的服务名， 与tnsnames.ora文件中的协议，主机，端口，服务名需要保持一致，客户端才可以正常连接数据库服务器。
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