Oracle10GDataGuard搭建
前面我们有讲到Oracle 11G DataGuard的搭建,10G的搭建也是大同小异.不过Oracle 10G不支持Standby open
在商城等地区,都构建了全面的区域性战略布局,加强发展的系统性、市场前瞻性、产品创新能力,以专注、极致的服务理念,为客户提供成都网站制作、成都做网站 网站设计制作按需制作网站,公司网站建设,企业网站建设,高端网站设计,成都全网营销,外贸网站制作,商城网站建设费用合理。
环境:
角色 | 主机名 | IP | 数据库版本 | 操作系统版本 |
Primary | fdb1 | 192.168.10.8 | 10.2.0.1 | CentOS 5.11 x86_64 |
Standby | fdb2 | 192.168.10.9 | 10.2.0.1 | CentOS 5.11 x86_64 |
在fdb1的/etc/hosts中加入(fdb1)
127.0.0.1 fdb1 192.168.10.9 fdb2
在fdb2的/etc/hosts中加入(fdb2)
127.0.0.1 fdb2 192.168.10.8 fdb1
创建必要的目录(fdb1,fdb2)
mkdir -p /opt/oracle/flash_recovery_area mkdir -p /opt/oracle/admin/fengdb/{a,b,c,u}dump mkdir /opt/oracle/oradata/fengdb -p mkdir -p /opt/oracle/dbackup mkdir -p /opt/oracle/flash_recovery_area/fengdb/archivelog
查看当前的redo组(fdb1)
select group#,member from v$logfile; //增加standby日志组 alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby04.log') size 50m; alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby05.log') size 50m; alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby06.log') size 50m; alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby07.log') size 50m;
创建原始参数文件用于备份(fdb1)
create pfile='/tmp/fengdb.pfile.ori' from spfile;
修改相关参数用于DataGuard环境,注意此处与Oracle 11G不同(fdb1)
alter system set db_unique_name=fdb1 scope=spfile; alter system set log_archive_config='dg_config=(fdb1,fdb2)' scope=spfile; alter system set log_archive_dest_1= 'location=/opt/oracle/flash_recovery_area/fengdb/archivelog valid_for=(all_logfiles,all_roles) db_unique_name=fdb1' scope=spfile; alter system set log_archive_dest_2= 'service=fdb2 async valid_for=(online_logfiles,primary_role) db_unique_name=fdb2' scope=spfile; alter system set log_archive_dest='' scope=spfile; alter system set log_archive_dest_state_1=enable scope=spfile; alter system set log_archive_dest_state_2=enable scope=spfile; alter system set standby_file_management=auto scope=spfile; alter system set fal_server=fdb2 scope=spfile; alter system set fal_client=fdb1 scope=spfile; alter system set db_file_name_convert='/opt/oracle/flash_recovery_area','/opt/oracle/flash_recovery_area' scope=spfile; alter system set log_file_name_convert='/opt/oracle/flash_recovery_area','/opt/oracle/flash_recovery_area' scope=spfile;
注意:与Oracle 11G不同的地方有: alter system set log_archive_dest='' scope=spfile; 否则可能出现ORA-16019: cannot use LOG_ARCHIVE_DEST_1 with LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST 以及上面都是直接修改spfile的,不修改当前运行中的参数 scope=spfile |
执行上面的语句其实就是改了下面的一些参数
*.db_unique_name='fdb1' *.log_archive_config='dg_config=(fdb1,fdb2)' *.log_archive_dest_1='location=/opt/oracle/flash_recovery_area/fengdb/archivelog valid_for=(all_logfiles,all_roles) db_unique_name=fdb1' *.log_archive_dest_2='service=fdb2 async valid_for=(online_logfiles,primary_role) db_unique_name=fdb2' *.log_archive_dest_state_1='ENABLE' *.log_archive_dest_state_2='ENABLE' *.standby_file_management='AUTO' *.fal_client='fdb1' *.fal_server='fdb2' *.db_file_name_convert='/opt/oracle/flash_recovery_area','/opt/oracle/flash_recovery_area' *.log_file_name_convert='/opt/oracle/flash_recovery_area','/opt/oracle/flash_recovery_area' *.log_archive_dest='' |
重启数据库以使数据库生效(fdb1)
shutdown immediate startup
修改监听(fdb1)
vim $ORACLE_HOME/network/admin/tnsnames.ora
fdb1 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = fdb1)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = fdb1) ) ) fdb2 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = fdb2)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = fdb2) ) )
RMAN备份(fdb1)
rman target / run{ allocate channel c1 type disk; backup format '/opt/oracle/dbackup/fengdb_%T_%s_%p' database; sql 'alter system archive log current'; backup format '/opt/oracle/dbackup/archive_log_%T_%s_%p' archivelog all; backup spfile format '/opt/oracle/dbackup/spfile_%u_%T.bak'; release channel c1; } copy current controlfile for standby to '/opt/oracle/dbackup/standby.ctl';
将备份及监听文件和密码文件全部复制到fdb2上(fdb1)
scp -r /opt/oracle/dbackup/* fdb2:/opt/oracle/dbackup
scp -r $ORACLE_HOME/network/admin/* fdb2:$ORACLE_HOME/network/admin/
scp -r $ORACLE_HOME/dbs/* fdb2:$ORACLE_HOME/dbs/
在fdb2上执行如下对数据库进行恢复(fdb2)
RMAN> startup nomount;
RMAN> restore spfile to pfile '/tmp/fengdb.pfile' from '/opt/oracle/dbackup/spfile_rmrioont_20161019.bak';
RMAN> shutdown immediate;
然后修改/etc/fengdb.pfile成如下的红色部分
*.db_unique_name='fdb2'
*.fal_client='fdb2'
*.fal_server='fdb1'
*.log_archive_config='dg_config=(fdb2,fdb1)'
*.log_archive_dest_1='location=/opt/oracle/flash_recovery_area/fengdb/archivelog valid_for=(all_logfiles,all_roles) db_unique_name=fdb2'
*.log_archive_dest_2='service=fdb1 async valid_for=(online_logfiles,primary_role) db_unique_name=fdb1'
*.log_archive_dest_state_1='ENABLE'
*.log_archive_dest_state_2='ENABLE'
备库复制控制文件(fdb2)
cp /opt/oracle/dbackup/standby.ctl /opt/oracle/oradata/fengdb/control01.ctl
cp /opt/oracle/dbackup/standby.ctl /opt/oracle/oradata/fengdb/control02.ctl
cp /opt/oracle/dbackup/standby.ctl /opt/oracle/oradata/fengdb/control03.ctl
启动至mount状态进行数据的恢复
RMAN> startup mount; RMAN> restore database;
启动备库应用日志
SQL> alter database recover managed standby database using current logfile disconnect from session;
创建参数文件
SQL> create spfile from pfile='/tmp/fengdb.pfile';
注意:Oracle 10G与11G的区别: 10G备库只能启动到mount状态,而11G可以启动到open read only. |
检查日志是否同步(fdb1,fdb2)
select sequence#,applied from v$archived_log;
也可以试着切换下日志
//切换日志 alter system switch logfile; select sequence#,applied from v$archived_log;
在主库:(fdb1)
select dest_name,status,error from v$archive_dest; alter system set log_archive_dest_state_2= enable;
查询角色(fdb1,fdb2)
select open_mode,database_role from v$database;
如果在备库上
SQL> select sequence#,applied from v$archived_log;
no rows selected
而且监听都是正常的,则有可能就是密码没复制过来
保持主库密码和备库密码一致
复制密码文件(fdb1)
scp $ORACLE_HOME/dbs/orapw$ORACLE_SID fdb2:$ORACLE_HOME/dbs/orapw$ORACLE_SID
Oracle 10G主备切换
db1---primary/db2---standby ===》db2--primary/db1--standby
[oracle@fdb1 ~]$ lsnrctl stop
(fdb1)SQL> alter database commit to switchover to physical standby with session shutdown;
(fdb1)SQL> shutdown immediate;
(fdb1)SQL> startup mount;
(fdb1)SQL> alter database recover managed standby database using current logfile disconnect from session;
//在执行这条的时候,如果出现
ERROR at line 1:
ORA-01665: control file is not a standby control file
则是没有执行alter database commit to switchover to physical standby with session shutdown;
若出现ORA-38500: USING CURRENT LOGFILE option not available without stand
这种情况出现在主备切换之后,备再切换回主的情况下出现
SQL> select member from v$logfile;
MEMBER
--------------------------------------------------------------------------------
/opt/oracle/oradata/fengdb/redo03.log
/opt/oracle/oradata/fengdbredo02.log
/opt/oracle/oradata/fengdb/redo01.log
增加standby flog即可
alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby04.log') size 50m;
alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby05.log') size 50m;
alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby06.log') size 50m;
alter database add standby logfile ('/opt/oracle/oradata/fengdb/standby07.log') size 50m;
[oracle@fdb1 ~]$ lsnrctl start
(fdb2)SQL> alter database commit to switchover to primary;
注意: 若出现ORA-16139: media recovery required,执行如下语句: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION; SQL> alter database commit to switchover to primary; 如果出现,则可能是已打开了会话,加上with session shutdown强制关闭绘画 ERROR at line 1: ORA-01093: ALTER DATABASE CLOSE only permitted with no sessions connected SQL> alter database commit to switchover to primary WITH SESSION SHUTDOWN; |
(fdb2)SQL> shutdown immediate;
(fdb2)SQL> startup;
文章题目:Oracle10GDataGuard搭建
分享路径:http://scyanting.com/article/jccjee.html