进行简单的手工表空间备份操作
查询一下表空间
select file_id,file_name,tablespace_name from dba_data_files;
FILE_NAME TABLESPACE_NAME
------------------------------ ------------------------------
/u01/app/oracle/oradata/ENMOED USERS
U/users01.dbf
/u01/app/oracle/oradata/ENMOED UNDOTBS1
U/undotbs01.dbf
/u01/app/oracle/oradata/ENMOED SYSAUX
U/sysaux01.dbf
/u01/app/oracle/oradata/ENMOED SYSTEM
U/system01.dbf
FILE_NAME TABLESPACE_NAME
------------------------------ -----------------------------
/u01/app/oracle/oradata/ENMOED ENMOEDU
U/ENMOEDU01.dbf
/u01/app/oracle/oradata/ENMOED ENMOEDU
U/EDNMOEDU02.db
/u01/app/oracle/oradata/ENMOED ENMOEDUBIG
U/enmoedubig.dbf

进行手工备份
SYS@ENMOEDU> alter tablespace ENMOEDUBIG begin backup;
alter tablespace ENMOEDUBIG begin backup
*
ERROR at line 1:
ORA-01123: cannot start online backup; media recovery not enabled

查询报错在操作系统中
oerr ora 01123
[oracle@ENMOEDU ENMOEDU]$ oerr ora 01123
01123, 00000, "cannot start online backup; media recovery not enabled"
// *Cause: An attempt to start backup of an on-line tablespace failed because
// media recovery is not enabled.
// *Action: Enable media recovery and retry this operation.

经过分析没有开启归档
查询归档状态
SYS@ENMOEDU> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 9
Current log sequence 10

在mount 下开启归档
SYS@ENMOEDU> alter database archivelog;
Database altered.

启动到open

SYS@ENMOEDU> alter tablespace ENMOEDU begin backup;
Tablespace altered.SYS@ENMOEDU> !cp /u01/app/oracle/oradata/ENMOEDU/ENMOEDU01.dbf /home/oracle/ENMOEDU01.dbf;

SYS@ENMOEDU> alter tablespace ENMOEDU END BACKUP;
Tablespace altered.

表空间完成备份
删除表空间模拟故障
SYS@ENMOEDU> !rm /u01/app/oracle/oradata/ENMOEDU/ENMOEDU01.dbf

关闭数据库
启动数据库SYS@ENMOEDU> startup
ORACLE instance started.

Total System Global Area 422670336 bytes
Fixed Size 1345380 bytes
Variable Size 318769308 bytes
Database Buffers 96468992 bytes
Redo Buffers 6086656 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 5 - see DBWR trace file
ORA-01110: data file 5: '/u01/app/oracle/oradata/ENMOEDU/ENMOEDU01.dbf'
报错
解决方法SYS@ENMOEDU> !mv /home/oracle/ENMOEDU01.dbf /u01/app/oracle/oradata/ENMOEDU
将数据文件备份拷回去
启动数据库

SYS@ENMOEDU> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 5 needs media recovery
ORA-01110: data file 5: '/u01/app/oracle/oradata/ENMOEDU/ENMOEDU01.dbf'
在进行恢复 recovery
SYS@ENMOEDU> recover datafile 5;
Media recovery complete.

将数据库打开到 open
alter database open;

SYS@ENMOEDU> alter database open;

Database altered.

ITPub博客

手工备份表空间

最新文章