标签：11G PRIM database standby oradb2 主备 STBY2 oracle ORA11G
1.PRIMARY
原来的主库，新增新备库的配置信息。
SQL> alter system set log_archive_dest_state_3=defer;
SQL> alter system set LOG_ARCHIVE_CONFIG='DG_CONFIG=(ORA11G_PRIM,ORA11G_STBY,ORA11G_STBY2)';
SQL> alter system set LOG_ARCHIVE_DEST_3='SERVICE=ORA11G_STBY2 ASYNC DELAY=60 VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ORA11G_STBY2';
2.FIRST STANDBY
第一套备库调整配置信息。
SQL> alter system set LOG_ARCHIVE_CONFIG='DG_CONFIG=(ORA11G_PRIM,ORA11G_STBY,ORA11G_STBY2)';
3.SECOND STANDBY
配置第二套备库。由于第一套备库和第二套备库在同一台物理机上，因此需要注意目录隔离，避免新备库破坏就备库的文件。
3.1 参数文件
[oracle@oradb2 ~]$ export ORACLE_SID=ora11g
SQL> create pfile='/home/oracle/11g2.pfile' from spfile;
[oracle@oradb2 ~]$ vi 11g2.pfile
*.audit_file_dest='/oracle/app/oracle/admin/ora11g2/adump'
*.control_files='/oradata/database/11g/ora11g2/control01.ctl','/oradata/database/11g/ora11g2/control02.ctl'
*.DB_UNIQUE_NAME='ORA11G_STBY2'
*.fal_server='ORA11G_PRIM'
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(ORA11G_PRIM,ORA11G_STBY,ORA11G_STBY2)'
*.LOG_ARCHIVE_DEST_1='LOCATION=/oradata/archive/11g2 VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=ORA11G_STBY2'
*.LOG_ARCHIVE_DEST_2='SERVICE=ORA11G_PRIM ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ORA11G_PRIM'
*.dg_broker_start=false
*.db_file_name_convert='/oradata/database/11g/ora11g/','/oradata/database/11g/ora11g2/'
*.log_file_name_convert='/oradata/database/11g/ora11g/','/oradata/database/11g/ora11g2/'
通过参数文件启动新备库到nomount状态
[oracle@oradb2 ~]$ export ORACLE_SID=ora11g2
SQL> startup nomount pfile='/home/oracle/11g2.pfile';
SQL> create spfile from pfile='/home/oracle/11g2.pfile';
SQL> startup force nomount;
3.2 口令文件
[oracle@oradb2 ~]$ cd $ORACLE_HOME/dbs
[oracle@oradb2 dbs]$ cp orapwora11g orapwora11g2
3.3 网络配置
[oracle@oradb2 dbs]$ cd $ORACLE_HOME/network/admin
[oracle@oradb2 admin]$ vi listener.ora
新增新备库的配置信息，注册到静态监听中。
(SID_DESC =
(GLOBAL_DBNAME = ORA11G_STBY2)
(ORACLE_HOME = /oracle/app/oracle/product/database/11g)
(SID_NAME = ora11g2)
)
(SID_DESC =
(GLOBAL_DBNAME = ORA11G_STBY2_DGMGRL)
(ORACLE_HOME = /oracle/app/oracle/product/database/11g)
(SID_NAME = ora11g2)
)
重启监听，使配置生效，检查所有配置的静态监听生效
[oracle@oradb2 ~]$ lsnrctl stop
[oracle@oradb2 ~]$ lsnrctl start
[oracle@oradb2 ~]$ lsnrctl status
Services Summary...
Service "ORA11G_STBY" has 2 instance(s).
Instance "ora11g", status UNKNOWN, has 1 handler(s) for this service...
Service "ORA11G_STBY2" has 2 instance(s).
Instance "ora11g2", status UNKNOWN, has 1 handler(s) for this service...
Service "ORA11G_STBY2_DGMGRL" has 1 instance(s).
Instance "ora11g2", status UNKNOWN, has 1 handler(s) for this service...
Service "ORA11G_STBY_DGMGRL" has 1 instance(s).
Instance "ora11g", status UNKNOWN, has 1 handler(s) for this service...
新增新备库tns配置信息。
[oracle@oradb2 admin]$ vi tnsnames.ora [主库也需要新增该配置]
ORA11G_STBY2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = oradb2)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORA11G_STBY2)
)
)
3.4 测试数据库连接 [主库和新备库都需要进行测试]
[oracle@oradb2 ~]$ sqlplus sys/oracle@ORA11G_STBY2 as sysdba
[oracle@oradb2 ~]$ sqlplus sys/oracle@ORA11G_PRIM as sysdba
3.5 新备库进行复制主库操作
注意此处连接到新的备库。
[oracle@oradb2 ~]$ export NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS';
[oracle@oradb2 ~]$ rman target sys/oracle@ORA11G_PRIM auxiliary sys/oracle@ORA11G_STBY2
RMAN> CONFIGURE DEVICE TYPE DISK PARALLELISM 4;
RMAN> DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE DORECOVER NOFILENAMECHECK;
3.6 启动新备库数据库并启动实时恢复
[oracle@oradb2 ~]$ export ORACLE_SID=ora11g2
SQL> alter database open;
SQL> alter database recover managed standby database using current logfile disconnect from session;
4.将新备库添加到dg broker中
[oracle@oradb2 ~]$ export ORACLE_SID=ora11g2
SQL> alter system set dg_broker_start=true;
[oracle@oradb2 ~]$ dgmgrl /
DGMGRL> show configuration;
DGMGRL> ADD DATABASE 'ORA11G_STBY2' AS CONNECT IDENTIFIER IS 'ORA11G_STBY2' MAINTAINED AS PHYSICAL;
DGMGRL> ENABLE DATABASE 'ORA11G_STBY2';
5. 进行主备切换操作
通过DG Broker管理的DG环境，在进行主备切换过程中，参数会自动进行维护，例如fal_server，log_archive_dest_2，log_archive_dest_3等。
DGMGRL> show configuration;
Configuration - ora11g_dg
Protection Mode: MaxPerformance
Databases:
ORA11G_PRIM - Primary database
ORA11G_STBY - Physical standby database
ORA11G_STBY2 - Physical standby database
DGMGRL> connect sys/oracle@ORA11G_STBY
DGMGRL> SWITCHOVER TO 'ORA11G_STBY';
切记在switchover时，使用用户名和口令连接到dgmgrl，否则会造成切换后，无法启动远程数据库，导致切换失败。
标签：11G,PRIM,database,standby,oradb2,主备,STBY2,oracle,ORA11G 来源： https://blog.51cto.com/recyclebin/2385772
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。