oracle 利用flashback将备库激活为read wirte(10g 及上)

oracle 利用flashback将备库激活为read wirte(10g 及上)

环境:

OS: CENTOS 6.5 X64

DB: ORACLE 10.2.0.5

主库操作:

SQL> alter system switch logfile;



System altered.



SQL>

 

备库操作

取消归档应用

SQL> alter database recover managed standby database cancel;



Database altered.



SQL> 



创建还原点



SQL>  create restore point restore_point_dg guarantee flashback database;



Restore point created.



SQL> 



主库操作

将备库的归档目的设置为defer(这样后台不会报错，防止主库传输数据到备库)



官方解释

defer

Specifies that valid destination information and attributes are preserved, but the destination is excluded from archiving operations until re-enable

SQL> alter system set log_archive_dest_state_2=defer;



将备库激活为read/wirte

SQL> alter database activate standby database;



Database altered.



SQL> alter database open;



Database altered.



SQL> 



备库状态为read/write

SQL> select open_mode from v$database;



OPEN_MODE

----------

READ WRITE



SQL> 



这样我们可以在备库Export操作了

[oracle@oracle10g-dg2-213-101 backup]$ expdp directory=backup dumpfile=test1`date +%F`.dmp logfile=test1`date +%F`.log schemas=test1



Export: Release 10.2.0.5.0 - 64bit Production on Monday, 15 September, 2014 22:37:17



Copyright (c) 2003, 2007, Oracle.  All rights reserved.



Username: / as sysdba



Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

Starting "SYS"."SYS_EXPORT_SCHEMA_01":  /******** AS SYSDBA directory=backup dumpfile=test12014-09-15.dmp logfile=test12014-09-15.log schemas=test1 

Estimate in progress using BLOCKS method...

Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA

Total estimation using BLOCKS method: 64 KB

Processing object type SCHEMA_EXPORT/USER

Processing object type SCHEMA_EXPORT/SYSTEM_GRANT

Processing object type SCHEMA_EXPORT/ROLE_GRANT

Processing object type SCHEMA_EXPORT/DEFAULT_ROLE

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/TABLE/TABLE

Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS

. . exported "TEST1"."TEST"                              4.960 KB       5 rows

Master table "SYS"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded

******************************************************************************

Dump file set for SYS.SYS_EXPORT_SCHEMA_01 is:

  /u01/app/oracle/dump/test12014-09-15.dmp

Job "SYS"."SYS_EXPORT_SCHEMA_01" successfully completed at 22:37:31



[oracle@oracle10g-dg2-213-101 backup]$ 



主库操作

主库上添加记录

SQL> insert into test values(10);



1 row created.



SQL> insert into test values(10);



1 row created.



SQL> insert into test values(10);



1 row created.



SQL> insert into test values(11);



1 row created.



SQL> insert into test values(11);



1 row created.



SQL> commit;



Commit complete.



System altered.



SQL> 



SQL> conn / as sysdba

Connected.

SQL> alter system switch logfile;



System altered.



SQL> 



备库操作

备库上删除表

[oracle@oracle10g-dg2-213-101 backup]$ sqlplus / as sysdba



SQL*Plus: Release 10.2.0.5.0 - Production on Mon Sep 15 22:40:53 2014



Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.





Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options



SQL> conn test1/test1

Connected.

SQL> drop table test purge;



Table dropped.



SQL> 



准备重新恢复到dg备库环境

SQL> startup mount force;

ORACLE instance started.



Total System Global Area  704643072 bytes

Fixed Size		    2098912 bytes

Variable Size		  192940320 bytes

Database Buffers	  503316480 bytes

Redo Buffers		    6287360 bytes

Database mounted.

SQL> 



闪回数据库

SQL>  flashback database to restore point restore_point_dg;



Flashback complete.



SQL> 



SQL> shutdown immediate;

ORA-01507: database not mounted





ORACLE instance shut down.

SQL> startup nomount;

ORACLE instance started.



Total System Global Area  704643072 bytes

Fixed Size		    2098912 bytes

Variable Size		  192940320 bytes

Database Buffers	  503316480 bytes

Redo Buffers		    6287360 bytes

SQL> alter database mount standby database;　＃或者alter database convert to physical standby;



Database altered.





主库操作

SQL> alter system set log_archive_dest_state_2=enable scope=both;



System altered.



SQL> 



备库操作，检查进程是否正常



SQL> select process,status from v$managed_standby;



PROCESS   STATUS

--------- ------------

ARCH	  CONNECTED

ARCH	  CONNECTED

ARCH	  CONNECTED

MRP0	  WAIT_FOR_LOG

RFS	  IDLE

RFS	  IDLE



6 rows selected.



SQL> 



主库操作

切换日志

SQL> alter system switch logfile;



System altered.



SQL> 



备库已正常

FS[1]: Successfully opened standby log 8: '/u01/app/oracle/oradata/netdata/st_redo08a.log'

Mon Sep 15 22:50:22 CST 2014

Media Recovery Log /u01/app/oracle/archive/netdata/1_79_857898543.arc

Media Recovery Waiting for thread 1 sequence 80