一、主机描述
dbprimary: 192.168.1.57 主机名称db1
dbstandby: 192.168.1.58 主机名成db2
SID: orcl
二、配置tns,配置好的文件内容:
dbprimary的listener.ora
(/db/app/oracle/product/11.2.0/network/admi目录下):
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = /db/app/oracle/product/11.2.0)
(GLOBAL_DBNAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = db1)(PORT =
1521))
)
)
dbstandby的listener.ora:
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = /db/app/oracle/product/11.2.0)
(GLOBAL_DBNAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = db2)(PORT =
1521))
)
)
dbprimary和dbstandby上的tnsnames.ora是一样的
# Generated by Oracle configuration tools.
DBSTANDBY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = db2)(PORT =
1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
DBPRIMARY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = db1)(PORT =
1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
然后在两台机器上分别检查配置是否正确
oracle>lsnrctl stop
oracle>lsnrctl start
oracle>lsnrctl status
oracle>tnsping dbprimary
oracle>tnsping dbstandby
oracle>sqlplus sys/[email protected] as sysdba
oracle>sqlplus sys/[email protected] as sysdba
三、在dbprimary上操作
1. oracle> mkdir /db/app/oracle/oradata/archive
2. cd /db/app/oracle/product/11.2.0/dbs
oracle> cp orapworcl orapworcl.bak
oracle> orapwd file=orapw$ORACLE_SID password=oracle entries=30 force=y
产生密码文件oraworcl,一定要拷贝到从库上,就算从库执行同样的命令也不行
3. 备份并重新创建pfile文件
oracle>mv initorcl.ora initorcl.ora.bak
oracle>sqlplus sys/password as sysdba
sql>create pfile from spfile;
在/db/app/oracle/product/11.2.0/dbs下生成initorcl.ora 在initorcl.ora文件后面增加内容:
*.DB_UNIQUE_NAME=‘dbprimary‘
*.LOG_ARCHIVE_CONFIG=‘DG_CONFIG=(dbprimary, dbstandby)‘
*.LOG_ARCHIVE_DEST_1=‘LOCATION=/db/app/oracle/oradata/archive/
VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=dbprimary‘
*.LOG_ARCHIVE_DEST_2=‘SERVICE=dbstandby LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=dbstandby‘
*.LOG_ARCHIVE_DEST_STATE_1=‘ENABLE‘
*.LOG_ARCHIVE_DEST_STATE_2=‘ENABLE‘
*.LOG_ARCHIVE_FORMAT=‘%t_%s_%r.arc‘
*.LOG_ARCHIVE_MAX_PROCESSES=30
*.FAL_SERVER=‘dbstandby‘
*.FAL_CLIENT=‘dbprimary‘
*.DB_FILE_NAME_CONVERT=‘dbstandby‘,‘dbprimary‘
*.STANDBY_FILE_MANAGEMENT=‘AUTO‘
4. 备份并重新创建spfile文件
oracle>mv
spfileorcl.ora spfileorcl.ora.bak
oracle>sqlplus sys/password as sysdba
sql>create spfile from pfile;
sql>startup mount;
sql>alter database archivelog;
sql>alter database open;
sql>archive log list; 查看是否处于log模式,如果不是执行如下命令
sql>alter database force logging; 改变为logging模式
sql>alter database create standby controlfile as ‘/db/app/oracle/oradata/standby01.ctl‘;
创建dbstandby上的控制文件
sql>shutdown immediate;
5. 把/db/app/oracle/oradata打包传到dbstandby服务器, 把 /db/app/oracle/product/11.2.0/dbs/oraworcl也传过去
四、在dbstandby服务器上操作
1. oracle>sqlplus sys/password as sysdba
sql>shutdown immediate;
2. oracle>cd /db/app/oracle
oracle>mv oradata
oradata.bak
把刚才传过来的包解压
oracle>cd oradata
oracle>cp standby01.ctl standby02.ctl
oracle>cp standby01.ctl standby03.ctl
3. 备份并重新创建pfile文件
oracle>mv initorcl.ora initorcl.ora.bak
sql>create pfile from spfile
修改initorcl.ora中的*.control_files参数
*.control_files=‘/db/app/oracle/oradata/standby01.ctl‘,‘/db/app/oracle/oradata/standby02.ctl‘,‘/db/app/oracle/oradata/standby03.ctl‘
增加
*.DB_UNIQUE_NAME=‘dbstandby‘
*.LOG_ARCHIVE_CONFIG=‘DG_CONFIG=(dbprimary, dbstandby)‘
*.LOG_ARCHIVE_DEST_1=‘LOCATION=/db/app/oracle/oradata/archive/
VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=dbstandby‘
*.LOG_ARCHIVE_DEST_2=‘SERVICE=dbprimary LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=dbprimary‘
*.LOG_ARCHIVE_DEST_STATE_1=‘ENABLE‘
*.LOG_ARCHIVE_DEST_STATE_2=‘ENABLE‘
*.LOG_ARCHIVE_FORMAT=‘%t_%s_%r.arc‘
*.LOG_ARCHIVE_MAX_PROCESSES=30
*.FAL_SERVER=‘dbprimary‘
*.FAL_CLIENT=‘dbstandby‘
*.DB_FILE_NAME_CONVERT=‘dbstandby‘,‘dbprimary‘
*.STANDBY_FILE_MANAGEMENT=‘AUTO‘
4. 备份并重新创建spfile文件
oracle>mv
spfileorcl.ora spfileorcl.ora.bak
oracle>sqlplus sys/password as sysdba
sql>create spfile from pfile;
sql>shutdown immediate;
到此为止,已经完成了oracle DataGuard主备的所有配置
五、主备配置验证,及数据库重启步骤
(重点)在主库(db1)服务器上开启两个命令窗口,分别使用sqlplus登录主库和备库
登录主库
sqlplus sys/[email protected] as sysdba
登录备库
sqlplus
sys/[email protected] as sysdba
1.关闭主库
SHUTDOWN
IMMEDIATE;
2.关闭备库
SHUTDOWN
IMMEDIATE;
3.启动备库到mount
startup mount;
4.启动主库
startup;
5.打开备库
alter database open;
6.开启备库上的同步服务
alter database recover managed standby
database disconnect from session;
7.检查是否工作正常
(备)sql>select max(sequence#) from
v$archived_log;
(主)sql>alter system switch logfile;
(主)sql>select max(sequence#) from v$archived_log; 查看当前sequence
(备)sql>select max(sequence#) from v$archived_log;
如果dbstandby的sequence跟着改变,说明已经好了
8. select dest_name,status,error from
v$archive_dest; 察看相应的归档路径的状态是否valid,否则根据error信息进行处理
9. 可以查看alert日志文件
/db/app/oracle/diag/rdbms/dbprimary/orcl/alert/log.xml
/db/app/oracle/diag/rdbms/dbprimary/orcl/trace/alert_orcl.log
原文地址:https://www.cnblogs.com/gaoyuechen/p/9515764.html