今天想學着別人做聯機備份表空間,看起來也就那麼兩句命令嘛,居然還是躲不過問題來襲,唉,悲哀~~~
1. 聯機備份出錯:
SQL> alter tablespace zy begin backup;
alter tablespace users begin backup
*
ERROR at line 1:
ORA-01123:cannot start online backup;media recovery not enabled
2. 查找錯誤原因:
在noarchive模式下不能做alter tablespace XXX begin backup,聯機備份只有在數據庫位於archivelog模式中才能進行。
在noarchive模式下不能做alter tablespace XXX begin backup,聯機備份只有在數據庫位於archivelog模式中才能進行。
3. 看看歸檔情況:
SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 36
Current log sequence 38
SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 36
Current log sequence 38
4. 以archive模式啓動數據庫:
SQL> shutdown immediate
SQL> shutdown immediate
SQL> startup mount
SQL> alter database archivelog;
5. 查看歸檔情況:
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 37
Next log sequence to archive 39
Current log sequence 39
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 37
Next log sequence to archive 39
Current log sequence 39
6. 開啓數據庫
SQL> alter database open;
Database altered.
SQL> alter database open;
Database altered.
7. 開啓聯機備份模式
SQL> alter tablespace zy begin backup;
Tablespace altered.
SQL> alter tablespace zy begin backup;
Tablespace altered.
SQL> host copy C:\oracle\product\10.1.0\oradata\orcl\ZY01.DBF C:\backup
已複製 1個文件
已複製 1個文件
SQL> alter tablespace zy end backup;
Tablespace altered.
Tablespace altered.
成功!