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在Oracle12.1之前的版本中要重命名數(shù)據(jù)文件或移動數(shù)據(jù)文件需要關(guān)閉數(shù)據(jù)庫或把表空間/數(shù)據(jù)文件置為offline狀態(tài)才可以,參考之前總結(jié)的Oracle修改數(shù)據(jù)文件名/移動數(shù)據(jù)文件。但到了12.1版本,可以直接在數(shù)據(jù)文件online狀態(tài)下把數(shù)據(jù)文件重命名或移動數(shù)據(jù)文件。
要實現(xiàn)這一功能需要使用ALTER
DATABASE
MOVE
DATAFILE
語句,語法如下
ALTER DATABASE MOVE DATAFILE ( 'filename' | 'ASM_filename' | file_number ) [ TO ( 'filename' | 'ASM_filename' ) ] [ REUSE ] [ KEEP ]
下面在12.2版本測試這一功能
zx@ORA12C>select * from v$version; BANNER CON_ID -------------------------------------------------------------------------------- ---------- Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production 0 PL/SQL Release 12.2.0.1.0 - Production 0 CORE 12.2.0.1.0 Production 0 TNS for Linux: Version 12.2.0.1.0 - Production 0 NLSRTL Version 12.2.0.1.0 - Production 0
1、創(chuàng)建測試表空間及數(shù)據(jù)文件:
sys@ORA12C>create tablespace t_move datafile '/home/oracle/t_move.dbf' size 50m ; Tablespace created. sys@ORA12C>col name for a50 sys@ORA12C>select d.name,d.status from v$datafile d,v$tablespace t where t.ts#=d.ts# and t.name='T_MOVE'; NAME STATUS -------------------------------------------------- ------- /home/oracle/t_move.dbf ONLINE
現(xiàn)在數(shù)據(jù)文件'/home/oracle/t_move.dbf'為ONLINE狀態(tài)
2、執(zhí)行重命名操作
sys@ORA12C>alter database move datafile '/home/oracle/t_move.dbf' to '/home/oracle/t_move01.dbf'; Database altered. sys@ORA12C>select d.name,d.status from v$datafile d,v$tablespace t where t.ts#=d.ts# and t.name='T_MOVE'; NAME STATUS -------------------------------------------------- ------- /home/oracle/t_move01.dbf ONLINE sys@ORA12C>!ls -l /home/oracle/t_move01.dbf -rw-r----- 1 oracle oinstall 52436992 Jul 11 16:07 /home/oracle/t_move01.dbf sys@ORA12C>!ls -l /home/oracle/t_move.dbf ls: cannot access /home/oracle/t_move.dbf: No such file or directory
可以看到文件名從t_move.dbf改為了t_move01.dbf,原文件已經(jīng)不存在了。
3、執(zhí)行移動目錄操作
sys@ORA12C>alter database move datafile '/home/oracle/t_move01.dbf' to '/u01/app/oracle/oradata/ora12c/t_move01.dbf'; Database altered. sys@ORA12C>!ls -l /u01/app/oracle/oradata/ora12c/t_move01.dbf -rw-r----- 1 oracle oinstall 52436992 Jul 11 16:10 /u01/app/oracle/oradata/ora12c/t_move01.dbf sys@ORA12C>!ls -l /home/oracle/t_move01.dbf ls: cannot access /home/oracle/t_move01.dbf: No such file or directory sys@ORA12C>select d.name,d.status from v$datafile d,v$tablespace t where t.ts#=d.ts# and t.name='T_MOVE'; NAME STATUS -------------------------------------------------- ------- /u01/app/oracle/oradata/ora12c/t_move01.dbf ONLINE
從上面的結(jié)果可以看到數(shù)據(jù)文件從'/home/oracle'目錄移動到了'/u01/app/oracle/oradata/ora12c'目錄下了。
4、copy數(shù)據(jù)文件到目標目錄,保留原文件
sys@ORA12C>alter database move datafile '/u01/app/oracle/oradata/ora12c/t_move01.dbf' to '/home/oracle/t_move01.dbf' keep; Database altered. sys@ORA12C>select d.name,d.status from v$datafile d,v$tablespace t where t.ts#=d.ts# and t.name='T_MOVE'; NAME STATUS -------------------------------------------------- ------- /home/oracle/t_move01.dbf ONLINE sys@ORA12C>!ls -l /home/oracle/t_move01.dbf -rw-r----- 1 oracle oinstall 52436992 Jul 11 16:15 /home/oracle/t_move01.dbf sys@ORA12C>!ls -l /u01/app/oracle/oradata/ora12c/t_move01.dbf -rw-r----- 1 oracle oinstall 52436992 Jul 11 16:15 /u01/app/oracle/oradata/ora12c/t_move01.dbf
從上面的結(jié)果可以看到數(shù)據(jù)文件改為了/home/oracle/t_move01.dbf,但原來的數(shù)據(jù)文件仍然被保留。
5、移動數(shù)據(jù)文件到ASM存儲
--文件系統(tǒng)到ASM ALTER DATABASE MOVE DATAFILE '/u01/oracle/rbdb1/user1.dbf' TO '+dgroup_01/data/orcl/datafile/user1.dbf'; --ASM到ASM ALTER DATABASE MOVE DATAFILE '+dgroup_01/data/orcl/datafile/user1.dbf' TO '+dgroup_02/data/orcl/datafile/user1.dbf';
參考:http://docs.oracle.com/database/121/ADMIN/dfiles.htm#ADMIN13837
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