【翻译自mos文章】在rac中，使用asmcmd命令从 文件系统 move system datafile 到asm磁盘组的方法

在rac中，使用asmcmd命令从 文件系统 move system datafile 到asm磁盘组的方法。

参考原文：

How to move a SYSTEM datafile from filesystem to the ASM diskgroup using ASMCMD on RAC. (Doc ID 1607292.1)

适用于：

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.1 [Release 10.2]

Information in this document applies to any platform.

症状：

由于误操作，客户在为system 表空间添加datafile时，没有带+号，添加datafile的命令执行后，datafile被创建在了一个节点的 $ORACLE_HOME/dbs 下。其他节点看不到这个新添加的datafile，会报ORA-01157: cannot identify/lock data file

需要move 该system表空的datafile 到 asm磁盘组中。

原因：

datafile被创建在了文件系统中，而不是创建在asm磁盘组中。

[oracle@mbrac2 ~]$ echo $ORACLE_SID

ORCL2

File exists on one node but not on the other:

[oracle@mbrac2 dbs]$ ls -ltr

total 524848

-rw-r--r--. 1 oracle oinstall 2851 May 15 2009 init.ora

-rw-r-----. 1 oracle oinstall 1536 Nov 28 16:12 orapwORCL2

-rw-r-----. 1 oracle oinstall 35 Nov 28 16:13 initORCL2.ora

-rw-rw----. 1 oracle dba 1544 Dec 3 15:23 hc_ORCL2.dat

-rw-r-----. 1 oracle dba 536879104 Dec 10 17:56 DATA ==============<<<<HERE

[oracle@mbrac1 dbs]$ ls -ltr

total 32

-rw-r--r--. 1 oracle oinstall 2851 May 15 2009 init.ora

-rw-r-----. 1 oracle oinstall 1536 Nov 28 16:12 orapwORCL1

-rw-r-----. 1 oracle oinstall 35 Nov 28 16:13 initORCL1.ora

-rw-rw----. 1 oracle dba 1544 Dec 3 15:23 hc_ORCL1.dat

上面的的显示可以看出：DATA只在mbrac2上有，在mbrac1上没有这个文件。

解决方案：

1.stop db

2.使用asmcmd命令move datafile

3.mount db

4.rename 该datafile

5.open db

6.在其他rac节点上重启数据库实例，否则会遇到错误ORA-01516 or original error ORA-01157: cannot identify/lock data file

======下面是具体的步骤=======

1.stop db

对于system 表空间，不得不stop db，否则会报错：ORA-01541: system tablespace cannot be brought offline

[oracle@mbrac1 dbs]$ pwd

/u01/app/oracle/product/11.2.0/dbhome_1/dbs

SQL> select TABLESPACE_NAME, file_name, file_id, online_status from dba_data_files where TABLESPACE_NAME='SYSTEM';

TABLESPACE_NAME

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

FILE_NAME

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

FILE_ID ONLINE_

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

SYSTEM

+DATA/orcl/datafile/system.256.832695063

1 SYSTEM

SYSTEM

/u01/app/oracle/product/11.2.0/dbhome_1/dbs/DATA

6 SYSTEM

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

No errors in alert.log

2. 使用asmcmd cp move datafile。注意：别名是正常的，因为这不是系统指派别名。

ASMCMD> cp /u01/app/oracle/product/11.2.0/dbhome_1/dbs/DATA +DATA/ORCL/DATAFILE/SYSTEM2

copying /u01/app/oracle/product/11.2.0/dbhome_1/dbs/DATA -> +DATA/ORCL/DATAFILE/SYSTEM2

ASMCMD> ls -lt

Type Redund Striped Time Sys Name

DATAFILE UNPROT COARSE DEC 10 18:00:00 Y USERS.259.832695063

DATAFILE UNPROT COARSE DEC 10 18:00:00 Y UNDOTBS2.264.832695177

DATAFILE UNPROT COARSE DEC 10 18:00:00 Y UNDOTBS1.258.832695063

N SYSTEM2 => +DATA/ASM/DATAFILE/SYSTEM2.268.833825159

DATAFILE UNPROT COARSE DEC 10 18:00:00 Y SYSTEM.256.832695063

DATAFILE UNPROT COARSE DEC 10 18:00:00 Y SYSAUX.257.832695063

--->注意 oracle 10g的时候还没有asmcmd下的cp命令，

--->因此，若是10g，请参考NOTE:390274.1 - How to move a datafile from a file system to ASM

3. mount database

SQL> startup mount;

ORACLE instance started.

Total System Global Area 1252663296 bytes

Fixed Size 2252824 bytes

Variable Size 805310440 bytes

Database Buffers 436207616 bytes

Redo Buffers 8892416 bytes

Database mounted.

4. rename datafile ：

SQL> alter database rename file '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/DATA' to '+DATA/ORCL/DATAFILE/SYSTEM2';

Database altered.

5.open db：

SQL> alter database open;

Database altered.

6. 在其他rac节点上重启数据库实例，否则会遇到错误ORA-01516 or original error ORA-01157: cannot identify/lock data file

在所有实例上对比system表空间的datafile，看是否一样。

[oracle@mbrac1 dbs]$ echo $ORACLE_SID

ORCL1

[oracle@mbrac1 dbs]$

[oracle@mbrac1 dbs]$ sqlplus

SQL*Plus: Release 11.2.0.4.0 Production on Tue Dec 10 19:00:47 2013

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Enter user-name: / as sysdba

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Data Mining and Real Application Testing options

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup;

ORACLE instance started.

Total System Global Area 1252663296 bytes

Fixed Size 2252824 bytes

Variable Size 872419304 bytes

Database Buffers 369098752 bytes

Redo Buffers 8892416 bytes

Database mounted.

Database opened.

SQL>

SQL>

SQL> select TABLESPACE_NAME, file_name, file_id from dba_data_files where TABLESPACE_NAME='SYSTEM';

TABLESPACE_NAME FILE_NAME FILE_ID

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

SYSTEM

+DATA/orcl/datafile/system.256.832695063

1

SYSTEM

+DATA/orcl/datafile/system2

6

SQL> select INSTANCE_NUMBER, INSTANCE_NAME from v$instance ;

INSTANCE_NUMBER INSTANCE_NAME

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

1 ORCL1

Then on the second node:

SQL> select TABLESPACE_NAME, file_name, file_id, online_status from dba_data_files where TABLESPACE_NAME='SYSTEM';

TABLESPACE_NAME FILE_NAME FILE_ID ONLINE_

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

SYSTEM +DATA/orcl/datafile/system.256.832695063

1 SYSTEM

SYSTEM +DATA/orcl/datafile/system2

6 SYSTEM

SQL> select INSTANCE_NUMBER, INSTANCE_NAME from v$instance ;

INSTANCE_NUMBER INSTANCE_NAME

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

2 ORCL2