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【DATAGUARD】DATAGUARD 与 静态监听
2016-04-14 3131 版权
版权声明： 本文内容由阿里云实名注册用户自发贡献，欧博注册版权归原作者所有，阿里云开发者社区不拥有其著作权，亦不承担相应法律责任。具体规则请查看《 阿里云开发者社区用户服务协议》和 《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容，欧博代理填写 侵权投诉表单进行举报，一经查实，本社区将立刻删除涉嫌侵权内容。 简介：
在Oracle DATAGUARD实验中必须要用到静态监听，欧博官网否则很严重(例子前面创建dg的过程中有遇到) 静态监听指实例启动时读取listener.ora配置文件，将实例和服务注册到监听程序。无论何时启动一个数据库，默认都有两条信息注册到监听器中：实例和服务 SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = Oranet) (SID_NAME = yangdb) ) ) LISTENER = (DESCRIPTION = ( ADDRESS = (HOST = 172.18.85.21)(PROTOCOL = TCP)(PORT = 1521) ) )
SID_LIST_LISTENER中： GLOBAL_DBNAME表示向外提供的服务名，欧博娱乐 SID_NAME是提供注册的实例 在tnsnames.ora文件中的CONNECT_DATA部分，可分别选择SERVICE_NAME=Oranet或SID=yangdb为客户端提供连接。 动态注册不需要显示的配置listener.ora文件，实例启动的时候，欧博allbetPMON进程根据instance_name,service_name参数将实例和服务动态注册到listerer中。如果没有设定instance_name，将使用db_name初始化参数值。如果没有设定service_names，将拼接db_name和db_domain参数值来注册监听。 在DATAGUARD架构中，我们需要将备库启动到mount状态，并应用主库的redo日志文件。因此，主库和备库要能相互监听到对方。在动态监听的情况下，如果实例没有启动到open状态，就无法通过网络将服务注册到数据库，而只有静态监听可以完成这个任务。让实例启动时读取listener.ora配置文件，将实例和服务注册到监听程序。
LSNRCTL> status Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rac3)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 08-SEP-2011 11:42:07 Uptime 0 days 0 hr. 14 min. 1 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /opt/oracle/11.2.0/yangdb/network/admin/listener.ora Listener Log File /opt/oracle/diag/tnslsnr/rac3/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac3)(PORT=1521))) Services Summary... Service "yangdb" has 1 instance(s). Instance "yangdb", status UNKNOWN, has 1 handler(s) for this service... Service "rac" has 1 instance(s). Instance "yangdb", status BLOCKED, has 1 handler(s) for this service... The command completed successfully
如上面显示的blocked 状态！即阻塞状态，不能对外提供服务！ 下面显示的是我配置的静态监听内容以及TNS文件内容，为listener.ora添加静态监听： oracle@rac3:/opt/oracle/11.2.0/yangdb/network/admin>cat tnsnames.ora # tnsnames.ora Network Configuration File: /opt/oracle/11.2.0/yangdb/network/admin/tnsnames.ora # Generated by Oracle configuration tools. yangdb = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.250.7.241)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = yangdb) ) ) rac = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.250.7.200)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = rac) ) ) oracle@rac3:/opt/oracle/11.2.0/yangdb/network/admin>cat listener.ora # listener.ora Network Configuration File: /opt/oracle/11.2.0/yangdb/network/admin/listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = /opt/oracle/11.2.0/yangdb) (PROGRAM = extproc) ) (SID_DESC = (GLOBAL_DBNAME = yangdb) (ORACLE_HOME = /opt/oracle/11.2.0/yangdb) (SID_NAME = yangdb) ) )
LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = rac3)(PORT = 1521)) ) ) ADR_BASE_LISTENER = /opt/oracle oracle@rac3:/opt/oracle/11.2.0/yangdb/network/admin>lsnrctl reload LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 09-SEP-2011 22:44:24 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) The command completed successfully
oracle@rac3:/opt/oracle/11.2.0/yangdb/network/admin>lsnrctl status LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 09-SEP-2011 22:44:33
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 08-SEP-2011 13:18:24 Uptime 1 days 9 hr. 26 min. 9 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /opt/oracle/11.2.0/yangdb/network/admin/listener.ora Listener Log File /opt/oracle/diag/tnslsnr/rac3/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac3)(PORT=1521))) Services Summary... Service "PLSExtProc" has 1 instance(s). Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service... Service "yangdb" has 2 instance(s). Instance "yangdb", status UNKNOWN, has 1 handler(s) for this service... Instance "yangdb", status READY, has 1 handler(s) for this service... The command completed successfully oracle@rac3:/opt/oracle/11.2.0/yangdb/network/admin> (责任编辑：) |