数据库迁移方案之DG方式迁移
一:环境信息1)主库(单实例)主机平台:AIX6.1数据库版本:11.2.0.3(psu5)2)备库(部署了crs)主机平台:AIX6.1数据库版本:11.2.0.3(psu5)二:方案背景由
一:环境信息
1)主库(单实例)
主机平台:AIX6.1
数据库版本:11.2.0.3(psu5)
2)备库(部署了crs)
主机平台:AIX6.1
数据库版本:11.2.0.3(psu5)
二:方案背景
由于业务量增加,数据库需要由单实例,改成两节点rac。为了减少停机时间,采用DG方式迁移。
三迁移方案:
1.检查数据库是否支持Data Guard(只有企业版才支持DG)
SQL> select * from v$option where parameter = 'Managed Standby'; PARAMETER VALUE ---------------------------------------------------------------- ---------------------------------------------------------------- Managed Standby TRUE2.修改主库为归档模式及force logging状态
1)
2)
SQL> archive log list;
如果未开归档,开启归档模式
3.创建备库pfile文件
在主库上创建pfile,修改,并添加DG备库所有参数,然后传至备库
1)备库需要添加的参数
DB_UNIQUE_NAME;LOG_ARCHIVE_DEST_1;FAL_SERVER;FAL_CLIENT; STANDBY_FILE_MANAGEMENT=AUTO;DB_FILE_NAME_CONVERT;LOG_FILE_NAME_CONVERT
2)根据pfile中涉及到路径需要提前在备库主机上建好(如果主备库路径不一致要修改)
如主库*.audit_file_dest='/apps/oracle/admin/egap/adump'
我们在备库需要建 mkdir -p /apps/oracle/admin/egap/adump
cd /apps/oracle/admin
chown -R oracle:oinstall egap
chmod -R 775 egap
改变前参数文件
*.__db_cache_size=27648851968 *.__java_pool_size=67108864 *.__large_pool_size=67108864 *.__oracle_base='/apps/oracle'#ORACLE_BASE set from environment *.__pga_aggregate_target=10334765056 *.__sga_target=30937186304 *.__shared_io_pool_size=0 *.__shared_pool_size=2952790016 *.__streams_pool_size=0 *.audit_file_dest='/apps/oracle/admin/egap/adump' *.audit_trail='db' *.compatible='11.2.0.0.0' *.control_files='/data01/egap/control01.ctl','/data01/egap/control02.ctl' *.db_block_size=8192 *.db_domain='' *.db_name='egap' *.diagnostic_dest='/apps/oracle' *.log_archive_dest_1='location=/archlog/egap' *.log_archive_format='egap_%t_%s_%r.arch' *.open_cursors=300 *.pga_aggregate_target=10307502080 *.processes=150 *.remote_login_passwordfile='EXCLUSIVE' *.sga_target=30922506240 *.undo_tablespace='UNDOTBS1'改变后参数文件
*.__db_cache_size=27648851968 *.__java_pool_size=67108864 *.__large_pool_size=67108864 *.__oracle_base='/apps/oracle'#ORACLE_BASE set from environment *.__pga_aggregate_target=10334765056 *.__sga_target=30937186304 *.__shared_io_pool_size=0 *.__shared_pool_size=2952790016 *.__streams_pool_size=0 *.audit_file_dest='/apps/oracle/admin/egapdb/adump' *.audit_trail='db' *.compatible='11.2.0.0.0' *.control_files='/data01/egapdb/control01.ctl','/data01/egapdb/control02.ctl' *.db_block_size=8192 *.db_domain='' *.db_name='egap' *.diagnostic_dest='/apps/oracle' *.log_archive_dest_1='location=/archlog/egapdb1' *.log_archive_dest_2='SERVICE=primary LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=egap' *.log_archive_format='egapdb_%t_%s_%r.arch' *.open_cursors=300 *.pga_aggregate_target=10307502080 *.processes=150 *.remote_login_passwordfile='EXCLUSIVE' *.sga_target=30922506240 *.undo_tablespace='UNDOTBS1' *.DB_UNIQUE_NAME=egapdb *.FAL_SERVER=primary *.FAL_CLIENT=standby1 *.STANDBY_FILE_MANAGEMENT=AUTO *.DB_FILE_NAME_CONVERT='/data01/egap','/data01/egapdb' *.LOG_FILE_NAME_CONVERT='/data01/egap','/data01/egapdb' *.LOG_ARCHIVE_CONFIG='DG_CONFIG=(egap,egapdb)'###注意db_file_name_convert和log_file_name_convert参数指定的路径要存在
4)根据修改后的pfile创建备库spfile
export ORACLE_SID=egapdb1 sqlplus / as sysdba create spfile from pfile;--使用新生成的spfile检查是否能够成功启动实例
4.生成备库的密码文件
scp主库密码文件到备库,并改名
如果主库没有密码文件,需要新建
--主库密码文件传到备库以后要重启备库
5.配置主备库监听及net服务
1)listener
--主库
一般建库后都会配置监听我们无需再配置
--备库(因为安装了cluster,所以用的是cluster的监听)
lsnrctl status 查看监听文件位置,并在监听文件中加入如下类容

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