DGbroker故障切换示例

1.主库故障

SQL> startup
ORACLE instance started.

Total System Global Area  bytes
Fixed Size             bytes
Variable Size           bytes
Database Buffers       bytes
Redo Buffers             bytes
ORA-: error in identifying control file, check alert log for more info

2.dgmgrl故障提示

DGMGRL> show configuration;

Configuration - dgc

  Protection Mode: MaxPerformance
  Databases:
    atest1 - Primary database
    atest2 - Physical standby database

Fast-Start Failover: DISABLED

Configuration Status:
ORA-: the Data Guard broker is not yet available
ORA-: cannot reach database "atest1"
DGM-: 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 - dgc

  Protection Mode: MaxPerformance
  Databases:
    atest2 - Primary database
    atest1 - Physical standby database (disabled)
      ORA-: the standby database needs to be reinstated

Fast-Start Failover: DISABLED

Configuration 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/@atest2 auxiliary sys/@atest1

　　c.执行数据库克隆

RMAN> duplicate target database for standby nofilenamecheck from active database;

Starting Duplicate Db at -DEC-
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID= device type=DISK

contents of Memory Script:
{
   backup as copy reuse
   targetfile  '/u01/app/oracle/product/11.2.0/db1/dbs/orapwatest' auxiliary format
 '/u01/app/oracle/product/11.2.0/db1/dbs/orapwatest'   ;
}
executing Memory Script

Starting backup at -DEC-
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID= device type=DISK
Finished backup at -DEC-

contents 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 Script

sql 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=spfile

Starting backup at -DEC-
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./db1/dbs/snapcf_atest.f tag=TAG20151229T212657 RECID= STAMP=
channel ORA_DISK_1: datafile copy complete, elapsed time: ::
Finished backup at -DEC-

Starting restore at -DEC-
using channel ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: copied control file copy
Finished restore at -DEC-

sql 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=spfile

Oracle instance shut down

connected to auxiliary database (not started)
Oracle instance started

Total System Global Area     bytes

Fixed Size                      bytes
Variable Size                 bytes
Database Buffers              bytes
Redo Buffers                    bytes

contents of Memory Script:
{
   sql clone 'alter database mount standby database';
}
executing Memory Script

sql statement: alter database mount standby database

contents of Memory Script:
{
   set newname for clone tempfile   to new;
   switch clone tempfile all;
   set newname for clone datafile   to new;
   set newname for clone datafile   to new;
   set newname for clone datafile   to new;
   set newname for clone datafile   to new;
   set newname for clone datafile   to new;
   set newname for clone datafile   to new;
   backup as copy reuse
   datafile   auxiliary format new
   datafile   auxiliary format new
   datafile   auxiliary format new
   datafile   auxiliary format new
   datafile   auxiliary format new
   datafile   auxiliary format new
   ;
   sql 'alter system archive log current';
}
executing Memory Script

executing command: SET NEWNAME

renamed tempfile  to /u01/app/oracle/oradata/ATEST1/datafile/o1_mf_temp_%u_.tmp in control file

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting backup at -DEC-
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
channel ORA_DISK_1: starting datafile copy
input datafile file number= 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: ::
Finished backup at -DEC-

sql statement: alter system archive log current

contents of Memory Script:
{
   switch clone datafile all;
}
executing Memory Script

datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_17qq2gdu_.dbf
datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_sysaux_18qq2gf1_.dbf
datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_undotbs1_19qq2gg5_.dbf
datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_users_1aqq2ggc_.dbf
datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_15qq2g9s_.dbf
datafile  switched to datafile copy
input datafile copy RECID= STAMP= file name=/u01/app/oracle/oradata/ATEST1/datafile/o1_mf_system_16qq2gcr_.dbf
Finished Duplicate Db at -DEC-

　　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 - dgc

  Protection Mode: MaxPerformance
  Databases:
    atest2 - Primary database
    atest1 - Physical standby database

Fast-Start Failover: DISABLED

Configuration 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-: 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 - dgc

  Protection Mode: MaxPerformance
  Databases:
    atest1 - Primary database
    atest2 - Physical standby database

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS