使用RMAN实现不完全恢复


1. 故障原因

使用ruby将ql用户下的表全部彻底删除，回收站没有，因此使用“闪回表”失效；

flashback database被关闭；

只有通过介质恢复。

2. 使用RMAN实现基于时间点的恢复

2.1 启动数据库到mount
SQL> startup nomount;

Oracle instance started.

 

Total System Global Area 2254802944 bytes

Fixed Size              2215344 bytes

Variable Size              1375732304 bytes

Database Buffers      872415232 bytes

Redo Buffers                 4440064 bytes


2.2 恢复控制文件到误删除之前的一个副本
RMAN> restore controlfile from '/opt/oracle/11g/flash_recovery_area/ORCL//2012_06_03/o1_mf_s_784987822_7worxgk6_.bkp';

 


2.3 mount数据库
SQL> alter database mount;

 

Database altered.


2.4 将数据库文件恢复到特定时间点

[oracle@localhost ~]$ export NLS_DATE_FORMAT='yyyy-mm-dd hh24:mi:ss'


[oracle@localhost ~]$ rman target /;


 


RMAN> run


2> {


3> set until time '2012-06-06 21:00:00';


4> restore database;


5> recover database


6> };


 


executing command: SET until clause


-- 开始介质恢复


Starting restore at 2012-06-07 09:32:23


using channel ORA_DISK_1


 


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 00001 to /opt/oracle/11g/oradata/o01.dbf


channel ORA_DISK_1: restoring datafile 00002 to /opt/oracle/11g/oradata/o01.dbf


channel ORA_DISK_1: restoring datafile 00003 to /opt/oracle/11g/oradata/os01.dbf


channel ORA_DISK_1: restoring datafile 00004 to /opt/oracle/11g/oradata/o1.dbf


channel ORA_DISK_1: restoring datafile 00005 to /opt/oracle/11g/oradata/oe01.dbf


channel ORA_DISK_1: restoring datafile 00006 to /opt/oracle/11g/software/s.dbf


channel ORA_DISK_1: reading from backup piece /opt/oracle/11g/flash_recovRCL/backupset/2012_06_03/o1_mf_nnndf_TAG20120603T120856_7wortx30_.bkp


channel ORA_DISK_1: piece handle=/opt/oracle/11g/flash_recovery_area/ORCLTAG20120603T120856_7wortx30_.bkp tag=TAG20120603T120856


channel ORA_DISK_1: restored backup piece 1


channel ORA_DISK_1: restore complete, elapsed time: 00:01:08


Finished restore at 2012-06-07 09:33:31


-- 开始日志恢复


Starting recover at 2012-06-07 09:33:31


using channel ORA_DISK_1


 


starting media recovery


 


archived log for thread 1 with sequence 294 is already on disk as file /oORCL/archivelog/2012_06_04/o1_mf_1_294_7wqlknmq_.arc


archived log for thread 1 with sequence 295 is already on disk as file /oORCL/archivelog/2012_06_04/o1_mf_1_295_7wrdpv34_.arc


archived log for thread 1 with sequence 296 is already on disk as file /oORCL/archivelog/2012_06_05/o1_mf_1_296_7wtd8745_.arc


archived log for thread 1 with sequence 297 is already on disk as file /oORCL/archivelog/2012_06_05/o1_mf_1_297_7ww7rbh6_.arc


archived log for thread 1 with sequence 298 is already on disk as file /oORCL/archivelog/2012_06_06/o1_mf_1_298_7wx5rl22_.arc


archived log for thread 1 with sequence 299 is already on disk as file /olog


archived log file name=/opt/oracle/11g/flash_recovery_area/ORCL/archivelo.arc thread=1 sequence=294


archived log file name=/opt/oracle/11g/flash_recovery_area/ORCL/archivelo.arc thread=1 sequence=295


archived log file name=/opt/oracle/11g/flash_recovery_area/ORCL/archivelo.arc thread=1 sequence=296


archived log file name=/opt/oracle/11g/flash_recovery_area/ORCL/archivelo.arc thread=1 sequence=297


archived log file name=/opt/oracle/11g/flash_recovery_area/ORCL/archivelo.arc thread=1 sequence=298


archived log file name=/opt/oracle/11g/oradata/orcl/redo02.log thread=1 s


media recovery complete, elapsed time: 00:00:44


Finished recover at 2012-06-07 09:34:15

2.5 打开数据库
SQL> alter database open resetlogs;

Database altered.

2.6 查看恢复后的表
SQL> conn ql/ql;

Connected.

SQL> select * from tab;

 

TNAME                              TABTYPE    CLUSTERID

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

TBL_SNS_ATTENTION             TABLE

TBL_SNS_BLOG                        TABLE

TBL_SNS_BLOGREAD              TABLE

TBL_SNS_BLOGREPLY             TABLE

TBL_SNS_BLOGTRANFER                TABLE

TBL_SNS_IMPTBLOG              TABLE

TBL_SNS_MAIL                         TABLE

 

TNAME                              TABTYPE    CLUSTERID

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

TBL_USER_ADMIN                  TABLE

TBL_USER_EXPERT                TABLE

TBL_USER_INFO                       TABLE

TBL_USER_PARENT                TABLE

TBL_USER_STARPRINCIPAL            TABLE

TBL_USER_STARTEACHER              TABLE

TBL_USER_STUDENT              TABLE

TBL_USER_TEACHER              TABLE

TBL_USER_TRANFER              TABLE

3. 后续操作

3.1 马上备份数据库
RMAN> backup database;
 
Starting backup at 2012-06-07 09:36:21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=129 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/opt/oracle/11g/oradata/orcl/undotb
input datafile file number=00002 name=/opt/oracle/11g/oradata/orcl/sysaux
input datafile file number=00001 name=/opt/oracle/11g/oradata/orcl/system
input datafile file number=00004 name=/opt/oracle/11g/oradata/orcl/users0
input datafile file number=00005 name=/opt/oracle/11g/oradata/orcl/exampl
input datafile file number=00006 name=/opt/oracle/11g/software/dbs/rman_t
channel ORA_DISK_1: starting piece 1 at 2012-06-07 09:36:22
channel ORA_DISK_1: finished piece 1 at 2012-06-07 09:37:17
piece handle=/opt/oracle/11g/flash_recovery_area/ORCL/backupset/2012_06_0bkp tag=TAG20120607T093621 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:55
Finished backup at 2012-06-07 09:37:17
 
Starting Control File and SPFILE Autobackup at 2012-06-07 09:37:17
piece handle=/opt/oracle/11g/flash_recovery_area/ORCL/autobackup/2012_06_NONE
Finished Control File and SPFILE Autobackup at 2012-06-07 09:37:18

3.2 回收ql删除表的权限

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