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探索Oracle之RMAN_07整个业务表空间丢失恢复

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Release: 2016-06-07 17:16:01
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1、 整个业务表空间丢失恢复 注意:以下的所有实验,都是基于上面的全库备份来做的恢复。 2.1 删除wwl表空间的所有数据文件

1、     整个业务表空间丢失恢复

注意:以下的所有实验,都是基于上面的全库备份来做的恢复。

2.1 删除wwl表空间的所有数据文件

[root@wwldb ~]# cd /DBData/WWL/

[root@wwldb WWL]# rm -rf wwl*

[root@wwldb WWL]# ll

总计 881068

-rw-r----- 1 Oracle oinstall  31457792 06-22 01:34 redo01.log

-rw-r----- 1 oracle oinstall  31457792 06-22 01:34 redo02.log

-rw-r----- 1 oracle oinstall  31457792 06-22 02:14 redo03.log

-rw-r----- 1 oracle oinstall 27263795206-22 02:08 sysaux01.dbf

-rw-r----- 1 oracle oinstall 50332467206-22 02:09 system01.dbf

-rw-r----- 1 oracle oinstall  20979712 05-29 22:00 temp01.dbf

-rw-r----- 1 oracle oinstall  26222592 06-22 02:08 undotbs01.dbf

-rw-r----- 1 oracle oinstall   5251072 06-22 01:34 users01.dbf

 

 2.2 启动数据库,报如下错误。

SQL> conn / as sysdba

Connected to an idle instance.

SQL> startup

ORACLE instance started.

 

Total System Global Area  285212672 bytes

Fixed Size                  1218968 bytes

Variable Size             100664936 bytes

Database Buffers          176160768 bytes

Redo Buffers                7168000 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 5- see DBWR trace file

ORA-01110: data file 5:'/DBData/WWL/wwl001.dbf'

 

  2.3 检查跟踪文件,非常清晰的告诉丢失了有文件找不到,丢失了。

***SERVICE NAME:() 2012-06-22 09:17:38.573

***SESSION ID:(167.1) 2012-06-22 09:17:38.573

ORA-01157:Message 1157 not found; No message file for product=RDBMS, facility=ORA;arguments: [5]

ORA-01110:Message 1110 not found; No message file for product=RDBMS, facility=ORA;arguments: [5] [/DBData/WWL/wwl001.dbf]

ORA-27037:Message 27037 not found; No message file for product=RDBMS, facility=ORA

LinuxError: 2: No such file or directory

Additionalinformation: 3

ORA-01157:Message 1157 not found; No message file for product=RDBMS, facility=ORA;arguments: [6]

ORA-01110:Message 1110 not found; No message file for product=RDBMS, facility=ORA;arguments: [6] [/DBData/WWL/wwl002.dbf]

ORA-27037:Message 27037 not found; No message file for product=RDBMS, facility=ORA

LinuxError: 2: No such file or directory

Additionalinformation: 3

ORA-01157:Message 1157 not found; No message file for product=RDBMS, facility=ORA;arguments: [7]

ORA-01110:Message 1110 not found; No message file for product=RDBMS, facility=ORA;arguments: [7] [/DBData/WWL/wwl003.dbf]

ORA-27037:Message 27037 not found; No message file for product=RDBMS, facility=ORA

LinuxError: 2: No such file or directory

Additionalinformation: 3

 

由如上的跟踪信息我们得出是由于/DBData/WWL/wwl001.dbf/DBData/WWL/wwl002.dbf/DBData/WWL/wwl001.dbf这三个文件丢失导致数据库无法起来,,并且这三个文件同时构成了一个WWL表空间。在这个表空间中存储了各种各样重要的数据。同样我们可以按照之前的方法通过恢复数据文件的方式来进行数据恢复,介于这次丢失的是所有数据文件,数量比较多,而且如果对所有数据文件做恢复,不仅大量的增加的工作量,同时也增加的恢复的风险。所以在这里我们通过使用RMAN执行表空间恢复的方式来进行恢复。当然基于表空间的恢复也分两种,一直是在不影响数据库其它业务情况下的在线联机恢复,还有一种是停机停业务的恢复,详细见如下:

2.4 恢复方法一:零停机,在线恢复

开始执行恢复操作,分为如下七个步骤:

SQL>select instance_name,status from v$instance;

INSTANCE_NAME    STATUS

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

WWL              OPEN

 

SQL>alter tablespace wwl offline for recover;

Tablespacealtered.

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