把文件系统的数据文件迁移到ASM存储
RAC环境,使用的是ASM作存储。
近日在给用户做数据库维护的过程中,发现有一部分数据文件存放在文件系统中,这是不正常的。导致另一台服务器上跑着的实例就不正常了。
于是需要把文件系统上的数据文件迁移到ASM存储上。
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下面模拟该场景
在rac1的节点上操作
未添加数据文件前数据文件的情况
SQL> select name from v$datafile;
FILE_NAME
------------------------------------------------------------
+DATA/asmdevdb/datafile/system.273.845258673
+DATA/asmdevdb/datafile/sysaux.274.845258703
+DATA/asmdevdb/datafile/undotbs1.264.845258723
+DATA/asmdevdb/datafile/users.271.845258761
4 rows selected.
SQL> alter tablespace users add datafile 'user01.dbf' size 10m;
Tablespace altered.
SQL> select file_name from dba_data_files;
FILE_NAME
------------------------------------------------------------
+DATA/asmdevdb/datafile/system.273.845258673
+DATA/asmdevdb/datafile/sysaux.274.845258703
+DATA/asmdevdb/datafile/undotbs1.264.845258723
+DATA/asmdevdb/datafile/users.271.845258761
/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf
5 rows selected.
我们过一段时间,观测其他节点。
我们使用sqlplus 登陆会报错误。
使用conn sys/password@devdb2 as sysdba,报以下错误:
ERROR:
ORA-01075: you are currently logged on
2、以normal 身份的用户连接(conn username/password@devdb2),报以下错误:
ERROR:
ORA-00604: 递归 SQL 级别 2 出现错误
ORA-01157: 无法标识/锁定数据文件 5 - 请参阅 DBWR 跟踪文件
ORA-01110: 数据文件 5: '/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf'
ORA-00604: 递归 SQL 级别 2 出现错误
ORA-01157: 无法标识/锁定数据文件 5 - 请参阅 DBWR 跟踪文件
ORA-01110: 数据文件 5: '/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf'
下面我采用rman 的方式,把/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf数据文件
迁移到ASM存储上。
把数据库启动到mount状态下
SQL> startup mount
ORACLE instance started.
Total System Global Area 393375744 bytes
Fixed Size 1336764 bytes
Variable Size 276826692 bytes
Database Buffers 109051904 bytes
Redo Buffers 6160384 bytes
Database mounted.
使用rman链接数据库
pxboracle->rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Mon May 12 22:49:59 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: DEVDB (DBID=260178701, not open)
RMAN> report schema;
using target database control file instead of recovery catalog
Report of database schema for database with db_unique_name ASMDEVDB
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 700 SYSTEM *** +DATA/asmdevdb/datafile/system.273.845258673
2 600 SYSAUX *** +DATA/asmdevdb/datafile/sysaux.274.845258703
3 200 UNDOTBS1 *** +DATA/asmdevdb/datafile/undotbs1.264.845258723
4 5 USERS *** +DATA/asmdevdb/datafile/users.271.845258761
5 10 USERS *** /u01/oracle/product/11.2.0/db_1/dbs/user01.dbf
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 20 TEMP 32767 +DATA/asmdevdb/tempfile/temp.275.845258729
RMAN> backup as copy datafile 5 format '+DATA';
Starting backup at 12-MAY-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=138 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00005 name=/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf
output file name=+DATA/asmdevdb/datafile/users.266.847407067 tag=TAG20140512T225103 RECID=1 STAMP=847407068
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:04
Finished backup at 12-MAY-14
RMAN> switch datafile '/u01/oracle/product/11.2.0/db_1/dbs/user01.dbf' to copy;
datafile 5 switched to datafile copy "+DATA/asmdevdb/datafile/users.266.847407067"
RMAN> alter database open;
database opened
RMAN> report schema;
Report of database schema for database with db_unique_name ASMDEVDB
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 700 SYSTEM *** +DATA/asmdevdb/datafile/system.273.845258673
2 600 SYSAUX *** +DATA/asmdevdb/datafile/sysaux.274.845258703
3 200 UNDOTBS1 *** +DATA/asmdevdb/datafile/undotbs1.264.845258723
4 5 USERS *** +DATA/asmdevdb/datafile/users.271.845258761
5 10 USERS *** +DATA/asmdevdb/datafile/users.266.847407067
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 20 TEMP 32767 +DATA/asmdevdb/tempfile/temp.275.845258729
注意:
以后在添加数据文件时,使用如下命令
alter tablespace users add datafile '+DATA' size 10m;
文件的路径要写存储路径,不用写文件名,ASM文件的命名不同于普通文件的命名,它的文件名一般不直接指定,由ASM系统自己生成,并且其管理方式是OMF。
SQL> conn / as sysdba
Connected.
SQL> alter tablespace users add datafile '+DATA' size 10m;
Tablespace altered.
SQL> select file_name from dba_data_files;
FILE_NAME
------------------------------------------------------------
+DATA/asmdevdb/datafile/system.273.845258673
+DATA/asmdevdb/datafile/sysaux.274.845258703
+DATA/asmdevdb/datafile/undotbs1.264.845258723
+DATA/asmdevdb/datafile/users.271.845258761
+DATA/asmdevdb/datafile/users.266.847407067
+DATA/asmdevdb/datafile/users.270.847408759
6 rows selected.
: