oracle基于時間點的不完全恢複

下面我們做一個實驗，示範如何對oracle進行基于時間點的不完全恢複（在實驗之前請確定資料庫具有有效備份）：

擷取此時的時間并記錄下來：

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;

TO_CHAR(SYSDATE,'YY

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

2014-08-23 00:47:49

把hh使用者下的h2删除：

SQL> drop table h2;

Table dropped.

使用rman将資料庫恢複到删除h2之前：

關閉資料庫，啟動rman，重新開機資料庫到mount：

SQL> conn /as sysdba

Connected.

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

[oracle@localhost ~]$ rman target / nocatalog

Recovery Manager: Release 11.2.0.1.0 - Production on Sat Aug 23 00:55:12 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database (not started)

RMAN> startup mount;

Oracle instance started

database mounted

Total System Global Area     849530880 bytes

Fixed Size                     1339824 bytes

Variable Size                553651792 bytes

Database Buffers             289406976 bytes

Redo Buffers                   5132288 bytes

使用rman将資料庫恢複到2014-08-23 00:47:49

RMAN> sql 'alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"';

sql statement: alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"

RMAN> restore database until time '2014-08-23 00:47:49';

Starting restore at 23-AUG-14

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=18 device type=DISK

skipping datafile 6; already restored to file /u01/app/datafile/test01.dbf

channel ORA_DISK_1: starting datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/orcl/undotbs01.dbf

channel ORA_DISK_1: restoring datafile 00005 to /u01/app/oracle/oradata/orcl/example01.dbf

channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0qpgkgjo_1_1

channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0qpgkgjo_1_1 tag=FULLDB

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:06

channel ORA_DISK_1: restoring datafile 00002 to /u01/app/oracle/oradata/orcl/sysaux01.dbf

channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/orcl/users01.dbf

channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/orcl/hh01.dbf

channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0ppgkgjo_1_1

channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0ppgkgjo_1_1 tag=FULLDB

channel ORA_DISK_1: restore complete, elapsed time: 00:00:35

channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/orcl/system01.dbf

channel ORA_DISK_1: reading from backup piece /u01/app/backup/fulldb_0opgkgjo_1_1

channel ORA_DISK_1: piece handle=/u01/app/backup/fulldb_0opgkgjo_1_1 tag=FULLDB

channel ORA_DISK_1: restore complete, elapsed time: 00:00:45

Finished restore at 23-AUG-14

RMAN> recover database until time '2014-08-23 00:47:49';

Starting recover at 23-AUG-14

using channel ORA_DISK_1

starting media recovery

archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856304357.dbf

archived log for thread 1 with sequence 2 is already on disk as file /u01/app/archivelog/dest1/1_2_856304357.dbf

archived log for thread 1 with sequence 3 is already on disk as file /u01/app/archivelog/dest1/1_3_856304357.dbf

archived log for thread 1 with sequence 1 is already on disk as file /u01/app/archivelog/dest1/1_1_856310126.dbf

archived log file name=/u01/app/archivelog/dest1/1_1_856304357.dbf thread=1 sequence=1

archived log file name=/u01/app/archivelog/dest1/1_2_856304357.dbf thread=1 sequence=2

archived log file name=/u01/app/archivelog/dest1/1_3_856304357.dbf thread=1 sequence=3

media recovery complete, elapsed time: 00:00:16

Finished recover at 23-AUG-14

使用resetlogs打開資料庫：

SQL> alter database open resetlogs;

Database altered.

SQL> select * from hh.h2;

        ID

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         1

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