【Oracle Database】数据库监听与连接

服务名  --根据业务需求修改[oracle@wallet01 ~]$ sqlplus / as sysdbaSQL> 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_nameNAME                                 TYPE                              VALUE------------------------------------ --------------------------------- ------------------------------instance_name                        string                            wallet数据库名 --不允许修改SQL> show parameter db_nameNAME                                 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 startLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 09-MAY-2019 10:43:13Copyright (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 - ProductionSystem parameter file is /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.oraLog messages written to /u01/app/oracle/diag/tnslsnr/wallet01/listener/alert/log.xmlListening 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                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionStart Date                09-MAY-2019 10:43:13Uptime                    0 days 0 hr. 0 min. 5 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.oraListener Log File         /u01/app/oracle/diag/tnslsnr/wallet01/listener/alert/log.xmlListening Endpoints Summary...  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=wallet01)(PORT=1521)))  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))The listener supports no servicesThe command completed successfully[oracle@wallet01 ~]$ lsnrctl statusLSNRCTL for Linux: Version 11.2.0.4.0 - Production on 09-MAY-2019 10:44:44Copyright (c) 1991, 2013, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=wallet01)(PORT=1521)))STATUS of the LISTENER------------------------Alias                     LISTENERVersion                   TNSLSNR for Linux: Version 11.2.0.4.0 - ProductionStart Date                09-MAY-2019 10:43:13Uptime                    0 days 0 hr. 1 min. 31 secTrace Level               offSecurity                  ON: Local OS AuthenticationSNMP                      OFFListener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.oraListener Log File         /u01/app/oracle/diag/tnslsnr/wallet01/listener/alert/log.xmlListening 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 2018Copyright (c) 1982, 2009, Oracle.  All rights reserved.Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsSQL> 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。