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Oracle10G Physical Standby Database笔记

原创 Linux操作系统 作者:NinGoo 时间:2019-07-16 14:21:01 0 删除 编辑

试验环境
primary server:
windows2000 server + oracle 10.0.1.0.2
ORACLE_SID:dgtest
ORACLE_HOME: D:oracleproduct10.1.0db_1

standby server:
windows XP pro + oracle 10.0.1.0.2
ORACLE_SID:dgtest
ORACLE_HOME: D:oracleproduct10.1.0db_1

配置步骤首先,装好primary和standby上的oracle,建SID同为dgtest的库,所有设置完全相同。然后停止shutdown两台上的oracle,将primary上的所有数据文件,控制文件,redo文件和password文件都copy到standby机器的相应位置。(还可以利用热备,rman等来建立初始standby库),这样,我们就拥有了两台完全一样的oracle server 。


1. 在primary database上设置force logging
SQL>alter database force logging;

2. 修改primary databse的初始化参数
DB_UNIQUE_NAME=’primary’
CONTROL_FILES='d:oracleproductoradatacontrol01.ctl',
'd:oracleproductoradatacontrol02.ctl',
'd:oracleproductoradatacontrol03.ctl'
LOG_ARCHIVE_DEST_1= 'LOCATION= d:oracleproductarch’
LOG_ARCHIVE_DEST_2= 'SERVICE=standby'
LOG_ARCHIVE_DEST_STATE_1=ENABLE
LOG_ARCHIVE_DEST_STATE_2=ENABLE
REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE
LOG_ARCHIVE_FORMAT='arc%s%t%r.arc'
FAL_SERVER=standby
FAL_CLIENT=primary
STANDBY_FILE_MANAGEMENT=AUTOLOCK_NAME_SPACE ----这是当主数据库和备用数据在同一台机上时要设该参数,设为备用数据库的SID

3. 设置primary database为archivelog模式
SQL>shutdown immediate;
SQL>startup mount;
SQL>alter database archivelog;
SQL>alter database open:

4. 在primary database上创建standby database的控制文件
SQL>shutdown immedaite;
SQL>startup mount;
SQL>alter database create standby controlfile as 'd:oracleproductoradatacontrolstandby.ctl'
SQL>alter database open;然后将该controlfile复制到standby server的对应位置

5. 修改standby databse的初始化参数
DB_UNIQUE_NAME=’standby’
CONTROL_FILES='d:oracleproductoradatacontrolstandby.ctl'
LOG_ARCHIVE_DEST_1= 'LOCATION= d:oracleproductarch’
LOG_ARCHIVE_DEST_2= 'SERVICE=primary'
LOG_ARCHIVE_DEST_STATE_1=ENABLE
LOG_ARCHIVE_DEST_STATE_2=ENABLE
STANDBY_ARCHIVE_DEST='d:oracleproductarch'
REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE
FAL_SERVER=primary
FAL_CLIENT=standby
STANDBY_FILE_MANAGEMENT=AUTO
DB_FILE_NAME_CONVERT ----当primary和standby的数据文件路径不一致时使用
LOG_FILE_NAME_CONVERT ----当primary和standby的数据文件路径不一致时使用LOCK_NAME_SPACE ----当主数据库和备用数据在同一台机上时设为备用数据库的SID

具体参数的说明请参考oracle在线文档

6. 设置primary database和standby database的tnsnames.ora
primary =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = primary_server)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = dgtest)
)
)

standby =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = standby_server)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = dgtest)
)
)

7. 启动standby database
SQL>startup nomount pfile=’d:oracleproductinitdgtest.ora’SQL>alter database mount standby database;

8. 启动primary database
SQL>startup pfile=’d:oracleproductinitdgtest.ora’

9. 启动standby database到recover manage模式
SQL>alter database recover managed standby database disconnect from session;

Switchover

在primary上
1. SQL>select switchover_status from v$database
switchover_status的值如果是To standby,可以直接switchover,如果是sessions active,
则需要在switchover的命令后面加上with session shutdown

2. SQL>alter database commit to switchover to physical standby;

3. SQL>shutdowm immediate;

4. SQL>startup mount;

在standby上
1. SQL> select switchover_status from v$database
switchover_status的值如果是To primary,可以直接switchover,如果是sessions active,
则需要在switchover的命令后面加上with session shutdown

2. SQL>alter database commit to switchover to primary;

3. SQL>shutdown immediate;

4. SQL>startup;

要想顺利的实现switchover,最好在每台server上都同时设置好primary和standby的一些初始化参数,虽然其中一些参数只有在primary或者standby其中之一上起作用

Failover

在standby上
1. SQL>alter database recover managed standby database finish;
or SQL>alter database recover managed standby database finish skip standby logfile;

2. SQL>alter database commit to switchover to primary;

3. SQL>shutdown immediate;

4. SQL>startup;

相关视图

v$archive_dest
v$archive_dest_status
v$log_history
v$archvied_log
v$managed_standby
v$archive_gap

常见问题

1. 日志无法传送
SQL>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

2. 无法使用alter database重命名data file在standby上,当设置standby_file_management为auto时,不允许下列操作
alter database rename
alter database add/drop logfile
alter database add/drop standby logfile member
alter database create datafile as

3. switchover失败
SQL>alter database commit to switchover to physical standby
ORA-01093:alter database close only permitted with no session connected察看引起该错误的活动session
SQL> select sid,process,program from v$session where type='USER' and
sid<>(select distinct sid from v$mystat);断开该session,或者使用如下命令来做switchover
SQL>alter database commit to switchover to physical standby with session shutdown;

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