The following are the most STANDBY execution, the main library will be prompted to perform (twice) of
[STANDBY read write Open Test]
to check standby status
SQL> SELECT NAME, DATABASE_ROLE, OPEN_MODE , SWITCHOVER_STATUS FROM V $ DATABASE;
NAME DATABASE_ROLE OPEN_MODE SWITCHOVER_STATUS
--------- ---------------- -------------------- --------------------
testdb PHYSICAL STANDBY MOUNTED NOT ALLOWED
FLASHBACK_ON want to open, so that flashback
SQL> SELECT FLASHBACK_ON FROM V $ DATABASE ;
FLASHBACK_ON
------------------
NO
SQL> alter database flashback on;
Database altered.
Set the flash recovery area, where the size of the log is generated based on short-term estimates of the size of the
SQL> Line the SET 200
SQL> Show the Parameter DB_RECOVERY_FILE_DEST
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /u01/app/oracle/fast_recovery_area
db_recovery_file_dest_size big integer 167280M
取消日志应用，刚提前cancel了
SQL> alter database recover managed standby database cancel;
alter database recover managed standby database cancel
*
ERROR at line 1:
ORA-16136: Managed Standby Recovery not active
Create a restore point
SQL> the Create Restore Point Guarantee Your restore_point_readonly the Flashback Database;
Restore point created.
Primary database log switch temporarily synchronized log
the SQL> ALTER log Current Archive System;
the System Altered.
SQL> alter system set log_archive_dest_state_2=defer;
System altered.
激活standby为read write并open
SQL> alter database activate standby database;
Database altered.
SQL> select name,open_mode,database_role,db_unique_name from v$database;
NAME OPEN_MODE DATABASE_ROLE DB_UNIQUE_NAME
--------- -------------------- ---------------- ------------------------------
testdb MOUNTED PRIMARY testdbdg2
SQL> alter database open;
Database altered.
SQL> set timing on;
SQL> select name,open_mode,database_role,db_unique_name from v$database;
NAME OPEN_MODE DATABASE_ROLE DB_UNIQUE_NAME
--------- -------------------- ---------------- ------------------------------
testdb READ WRITE PRIMARY testdbdg2
Elapsed: 00:00:00.00
write测试
SQL> create table scott.t as select * from dba_objects;
Table created.
Elapsed: 00:00:02.33
SQL> select count(*) from scott.t;
COUNT(*)
----------
98160
Elapsed: 00:00:00.01
SQL> truncate table scott.t;
Table truncated.
Elapsed: 00:00:09.43
SQL> select count(*) from scott.t;
COUNT(*)
----------
0
Elapsed: 00:00:00.00
SQL> drop table scott.t;
Table dropped.
Elapsed: 00:00:01.44
After the test is complete go back to a certain point in time, this time to determine a good point
【闪回测试】
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 4.2758E+10 bytes
Fixed Size 2262656 bytes
Variable Size 2.7380E+10 bytes
Database Buffers 1.5301E+10 bytes
Redo Buffers 74420224 bytes
Database mounted.
You can select sysdate- 5/1440 from dual; determine the need flashback time
SQL> flashback database to timestamp sysdate- 5/1440;
Flashback complete.
Elapsed: 00:02:19.84
SQL>
SQL> alter database open resetlogs;
Database altered.
Elapsed: 00:02:02.26
SQL> select count(*) from scott.t;
COUNT(*)
----------
98160
Elapsed: 00:00:00.03
[Test] reduction (to the standby state)
SQL> startup mount force
ORACLE instance started.
Total System Global Area 4.2758E+10 bytes
Fixed Size 2262656 bytes
Variable Size 2.7380E+10 bytes
Database Buffers 1.5301E+10 bytes
Redo Buffers 74420224 bytes
Database mounted.
SQL> flashback database to restore point restore_point_readonly;
Flashback complete.
再次回到PHYSICAL STANDBY
SQL> alter database convert to physical standby;
Database altered.
Forced to mount again, the application log
SQL> the Startup mount Force
ORACLE instance Started.
Total System Global Area 4.2758E+10 bytes
Fixed Size 2262656 bytes
Variable Size 2.7380E+10 bytes
Database Buffers 1.5301E+10 bytes
Redo Buffers 74420224 bytes
Database mounted.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
Primary library (execution) enable logging
the SQL> ALTER System SET log_archive_dest_state_2 = enable;
the System Altered.
SQL> alter system archive log current;
System altered.
Standby alter normal observation log