DGbroker故障切换示例

1.主库故障

SQL> startup
ORACLE instance started.Total System Global Area 1068937216 bytes
Fixed Size            2260088 bytes
Variable Size          910164872 bytes
Database Buffers      150994944 bytes
Redo Buffers            5517312 bytes
ORA-00205: error in identifying control file, check alert log for more info

2.dgmgrl故障提示

DGMGRL> show configuration;Configuration - dgcProtection Mode: MaxPerformanceDatabases:atest1 - Primary databaseatest2 - Physical standby databaseFast-Start Failover: DISABLEDConfiguration Status:
ORA-16525: the Data Guard broker is not yet available
ORA-16625: cannot reach database "atest1"
DGM-17017: unable to determine configuration status

3.执行故障切换

DGMGRL> failover to atest2;
Performing failover NOW, please wait...
Failover succeeded, new primary is "atest2"

DGMGRL> show configuration;Configuration - dgcProtection Mode: MaxPerformanceDatabases:atest2 - Primary databaseatest1 - Physical standby database (disabled)ORA-16661: the standby database needs to be reinstatedFast-Start Failover: DISABLEDConfiguration Status:
SUCCESS

查看状态如上，提示已切换成功，atest2已成为主库，而atest1处于故障中。

4.处理故障数据库（采用rman复制的方式）

　　a.故障库需要启动到nomount

　　b.登录rman

rlwrap rman target sys/123456@atest2 auxiliary sys/123456@atest1

　　c.执行数据库克隆

RMAN> duplicate target database for standby nofilenamecheck from active database;Starting Duplicate Db at 29-DEC-15
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=1147 device type=DISKcontents of Memory Script:
{backup as copy reusetargetfile  '/u01/app/oracle/product/11.2.0/db1/dbs/orapwatest' auxiliary format '/u01/app/oracle/product/11.2.0/db1/dbs/orapwatest'   ;
}
executing Memory ScriptStarting backup at 29-DEC-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK
Finished backup at 29-DEC-15contents of Memory Script:
{sql clone "alter system set  control_files = ''/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl'', ''/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl'' comment=''Set by RMAN'' scope=spfile";backup as copy current controlfile for standby auxiliary format  '/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl';restore clone controlfile to  '/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl' from '/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl';sql clone "alter system set  control_files = ''/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl'', ''/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl'' comment=''Set by RMAN'' scope=spfile";
   shutdown clone immediate;startup clone nomount;
}
executing Memory Scriptsql statement: alter system set  control_files =   ''/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl'', ''/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl'' comment= ''Set by RMAN'' scope=spfileStarting backup at 29-DEC-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
output file name=/u01/app/oracle/product/11.2.0/db1/dbs/snapcf_atest.f tag=TAG20151229T212657 RECID=10 STAMP=899760418
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 29-DEC-15Starting restore at 29-DEC-15
using channel ORA_AUX_DISK_1channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 29-DEC-15sql statement: alter system set  control_files =   ''/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl'', ''/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl'' comment= ''Set by RMAN'' scope=spfileOracle instance shut downconnected to auxiliary database (not started)
Oracle instance startedTotal System Global Area    1068937216 bytesFixed Size                     2260088 bytes
Variable Size                910164872 bytes
Database Buffers             150994944 bytes
Redo Buffers                   5517312 bytescontents of Memory Script:
{sql clone 'alter database mount standby database';
}
executing Memory Scriptsql statement: alter database mount standby databasecontents of Memory Script:
{set newname for clone tempfile  1 to new;switch clone tempfile all;set newname for clone datafile  1 to new;set newname for clone datafile  2 to new;set newname for clone datafile  3 to new;set newname for clone datafile  4 to new;set newname for clone datafile  5 to new;set newname for clone datafile  6 to new;backup as copy reusedatafile  1 auxiliary format newdatafile  2 auxiliary format newdatafile  3 auxiliary format newdatafile  4 auxiliary format newdatafile  5 auxiliary format newdatafile  6 auxiliary format new;sql 'alter system archive log current';
}
executing Memory Scriptexecuting command: SET NEWNAMErenamed tempfile 1 to /u01/app/oracle/oradata/ATEST1/datafile/o1_mf_temp_%u_.tmp in control fileexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEStarting backup at 29-DEC-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00005 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_system_c7sxhqz0_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_15qq2g9s_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00006 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_system_c7sxv77x_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_16qq2gcr_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_system_06qovlhs_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_17qq2gdu_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_sysaux_07qovlkt_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_sysaux_18qq2gf1_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_undotbs1_08qovlnu_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_undotbs1_19qq2gg5_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=/u01/app/oracle/oradata/ATEST2/datafile/o1_mf_users_09qovlod_.dbf
output file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_users_1aqq2ggc_.dbf tag=TAG20151229T212723
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 29-DEC-15sql statement: alter system archive log currentcontents of Memory Script:
{switch clone datafile all;
}
executing Memory Scriptdatafile 1 switched to datafile copy
input datafile copy RECID=10 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_17qq2gdu_.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=11 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_sysaux_18qq2gf1_.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=12 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_undotbs1_19qq2gg5_.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=13 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_users_1aqq2ggc_.dbf
datafile 5 switched to datafile copy
input datafile copy RECID=14 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_15qq2g9s_.dbf
datafile 6 switched to datafile copy
input datafile copy RECID=15 STAMP=899760656 file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_16qq2gcr_.dbf
Finished Duplicate Db at 29-DEC-15

　　d.删除和重新添加备库

DGMGRL> remove database atest1;
Removed database "atest1" from the configuration
DGMGRL> add database atest1;
Database "atest1" added
DGMGRL> disable configuration;
Disabled.
DGMGRL> enable configuration;
Enabled.
DGMGRL> show configuration;Configuration - dgcProtection Mode: MaxPerformanceDatabases:atest2 - Primary databaseatest1 - Physical standby databaseFast-Start Failover: DISABLEDConfiguration Status:
SUCCESS

　　e.把故障库启动到open状态

SQL> alter database open;Database altered.

5.如果需要，可以把主备库切换切回来

DGMGRL> switchover to atest1;
Performing switchover NOW, please wait...
Operation requires a connection to instance "atest" on database "atest1"
Connecting to instance "atest"...
Connected.
New primary database "atest1" is opening...
Operation requires startup of instance "atest" on database "atest2"
Starting instance "atest"...
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.
Database mounted.
Database opened.
Switchover succeeded, new primary is "atest1"
DGMGRL> show configuration;Configuration - dgcProtection Mode: MaxPerformanceDatabases:atest1 - Primary databaseatest2 - Physical standby databaseFast-Start Failover: DISABLEDConfiguration Status:
SUCCESS