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Oracle11g将数据库移动到不同的ASM磁盘组/修改ASM磁盘组的冗余属性

作者：mobiledu2502886053 | 来源：互联网 | 2018-07-10 01:12

ORACLE使用ASM存储，建库时磁盘组的冗余属性使用了EXTERN，现在想将磁盘组改为NORMAL，以下是具体步骤：

1. 新建一个期望属性的新磁盘组

[root@Oracle-LAB~]# su - grid

[grid@Oracle-LAB ~]$ asmca

或者用命令：

[grid@Oracle-LAB~]$ sqlplus / as sysasm

SQL > CREATE DISKGROUP DATA NORMAL REDUNDANCY DISK '/dev/raw/raw1'SIZE 5120 M DISK '/dev/raw/raw2'SIZE 5120 M DISK '/dev/raw/raw3' SIZE 5120 M;

2. 检查磁盘组

[grid@Oracle-LAB~]$ sqlplus / as sysasm

SQL> select state,name,type from v$asm_diskgroup;

STATE NAME TYPE

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

MOUNTED DATA EXTERN

MOUNTED FRA EXTERN

MOUNTED DATA01 NORMAL

3. 备份现有的数据库

[oracle@Oracle-LAB ~]$ sqlplus /nolog

SQL> conn /as sysdba

SQL> show parameter db_name

NAME TYPE VALUE

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

db_name string ORCL

SQL> show parameter control

NAME TYPE VALUE

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

control_file_record_keep_time integer 7

control_files string +DATA/orcl/controlfile/current

.260.833734379

control_management_pack_access string DIAGNOSTIC+TUNING

在新磁盘组生成新控制文件有两种方法（推荐方法二）：

方法一：通过备份现有控制文件来生成：

备份控制文件到新磁盘组

SQL> alter database backup controlfile to '+DATA01';

Database altered.

查看备份后的控制文件：

[root@Oracle-LABsoftware]# su - grid

[grid@Oracle-LAB ~]$ asmcmd

ASMCMD> ls +DATA01/ORCL/CONTROLFILE/

Backup.256.833381229

设定初始化参数：

SQL> alter system setcontrol_files='+DATA01/ORCL/CONTROLFILE/Backup.256.833381229' scope=spfile;

System altered.

[oracle@Oracle-LAB ~]$ rman target /

using targetdatabase control file instead of recovery catalog

database closed

databasedismounted

Oracle instance shut down

RMAN> startup nomount

connected totarget database (not started)

Oracle instancestarted

Total SystemGlobal Area 1653518336 bytes

Fixed Size 2228904 bytes

VariableSize 973081944 bytes

DatabaseBuffers 671088640 bytes

Redo Buffers 7118848 bytes

从原控制文件生成现有控制文件：

RMAN> restore controlfile from'+DATA/orcl/controlfile/current.259.833372337';

Starting restoreat 05-DEC-13

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: SID=13 device type=DISK

channelORA_DISK_1: copied control file copy

output file name=+DATA01/orcl/controlfile/backup.256.833381229

Finished restore at 05-DEC-13

方法二：使用添加控制文件的方法：

SQL> alter system set control_files='+DATA/orcl/controlfile/current.260.833734379','+DATA01'scope=spfile;

System altered.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instanceshut down.

SQL> startup nomount

ORACLE instance started.

Total System Global Area 1653518336 bytes

Fixed Size 2228904 bytes

Variable Size 973081944 bytes

Database Buffers 671088640 bytes

Redo Buffers 7118848 bytes

SQL> quit

[oracle@Oracle-LAB~]$ rman target/

RMAN> restore controlfile from '+DATA/orcl/controlfile/current.260.833734379';

Starting restore at 09-DEC-13

using target database control file instead of recoverycatalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=135 device type=DISK

channel ORA_DISK_1: copied control file copy

output file name=+DATA/orcl/controlfile/current.260.833734379

output filename=+DATA01/orcl/controlfile/current.256.833744103

Finished restore at 09-DEC-13

RMAN> quit

Recovery Manager complete.

[oracle@Oracle-LAB~]$ sqlplus /nolog

SQL> conn /as sysdba

Connected.

SQL> alter database mount;

Database altered.

SQL> alter database open;

Database altered.

SQL> show parameter control;

NAME TYPE VALUE

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

control_file_record_keep_time integer 7

control_files string +DATA/orcl/controlfile/current

.260.833734379,+DATA01/orcl/c

ontrolfile/current.256.833744103

control_management_pack_access string DIAGNOSTIC+TUNING

SQL> alter system setcontrol_files='+DATA01/orcl/controlfile/current.256.833744103' scope=spfile;

System altered.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 1653518336 bytes

Fixed Size 2228904 bytes

Variable Size 973081944 bytes

Database Buffers 671088640 bytes

Redo Buffers 7118848 bytes

Database mounted.

Database opened.

SQL> show parameter control;

NAME TYPE VALUE

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

control_file_record_keep_time integer 7

control_files string +DATA01/orcl/controlfile/curre

nt.256.833744103

control_management_pack_access string DIAGNOSTIC+TUNING

RMAN> shutdown immediate

RMAN> startup nomount

RMAN> alter database mount ;

database mounted

released channel: ORA_DISK_1

RMAN>backup as copy database format '+DATA01';

Starting backupat 05-DEC-13

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: SID=13 device type=DISK