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【赛迪网－it技术报道】一、安装
环境：
primary 数据库：sun01
standby 数据库：sun02
oracle_sid:bnet
1. 拷贝$oracle_base 到新机器上
2. 让primary数据库处于归档模式，对primary数据库做一个rman热备份
startup mount
alter database archivelog;
archive log list;
rman target sys/oracle
backup database format "/....";
3.创建data guard数据库控制文件
alter database create standby controlfile as '/....ctl';
4.设置监听
primary：
bnetguard =
( (description =
(address_list =
(address = (protocol = tcp)(host = sun02)(port = 1522))
)
(connect_data =
(server = dedicated)
(service_name = bnet)
)
)
standby:
listener.ora
listener =
(description_list =
(description =
(address_list =
(address = (protocol = ipc)(key = extproc))
)
(address_list =
(address = (protocol = tcp)(host = sun01)(port = 1522))
)
)
)
tnsname.ora
bnet =
( (description =
(address_list =
(address = (protocol = tcp)(host = sun02)(port = 1522))
)
(connect_data =
(server = dedicated)
(service_name = bnet)
)
)
5. 设置主机参数
alter database force logging;
主库强制归档
主机参数：
fal_client=bnetguard
fal_server=bnet
standby_file_management=auto
remote_login_passwordfile=exclusive
备机参数：
db_file_name_convert
log_file_name_convert
standby_file_management='auto'
standby_archive_dest=/export/home/oracle/oradata/bnet/arch
6.创建standby 数据库
orapwd
sqlplus "sys/oracle as sysdba"
startup nomount pfile='''
alter database mount standby database;
exit
rman target sys/oracle nocatalog
restore database
7.设置自动归档
alter system set log_archive_dest_2='server=bnetguard reopen=200'
8.启动data guard自动恢复状态
sqlplus "sys/oracle as sysdba"<
recover managed standby database;
exit
eof
9.测试
alter system archive log current;
二、维护：
使standby 数据库处与 read-only状态
reover cancel/recover managed standby database cancel;
取消恢复模式
alter database open read only;
启动数据库到只读状态
recover standby database;
使数据库切换到恢复模式
recover managed standby database time out 15;
如果超过15分钟没有传日志
restarting dead background process qmn0
"restarting dead background process qmn" message can continually
appear in the alert log during startup in rac environment.
workaround:
set aq_tm_processes=0 in the init.ora.
it can be set to desired value through
"alter system set aq_tm_processes=n" once the database is open completely.
alter database activate standby database;
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