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oracle asm磁盘头备份,11g中asm磁盘组元数据备份及恢复

注意：在11g中asm变化挺大的，用md_backup备份，用md_restore来恢复

1 当前磁盘组相关信息

SQL> select PATH,b.NAME from v$asm_disk

a,v$asm_diskgroup b where a.GROUP_NUMBER=b.GROUP_NUMBER;

PATH NAME

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

ORCL:ASM2 FFFNORMAL

ORCL:ASM3 FFFNORMAL

ORCL:ASM4 FFFNORMAL

ORCL:CRS1 OCRDG

ORCL:CRS2 OCRDG

ORCL:CRS3 OCRDG

6 rows selected.

2 md_backup操作

2.1 md_backup命令介绍

ASMCMD [+] > help md_backup

md_backup

The md_backup command creates a backup file

containing metadata

for one or more disk groups.

Volume and Oracle Automatic Storage Management

Cluster File System

(Oracle ACFS) file system information is not

backed up.

md_backup backup_file [-G diskgroup

[,diskgroup,...]]

The options for the md_backup command are

described below.

backup_file - Specifies the backup file in which you want

store the metadata.

-G diskgroup - Specifies the disk group name of the disk

group

that must be backed up

By default all the mounted disk groups are

included in the backup file,

which is saved in the current working

directory.

The first example shows the use of the backup

command when you run it

without the disk group option. This example

backs up all of the mounted

disk groups and creates the backup image in the

current working

directory. The second example creates a backup

of disk group DATA and

FRA. The backup that this example creates is

saved in the

/tmp/dgbackup20090716 file.

ASMCMD [+] > md_backup

/tmp/dgbackup20090716

ASMCMD [+] > md_backup /tmp/dgbackup20090716

-G DATA,FRA

Disk group metadata to be backed up: DATA

Disk group metadata to be backed up: FRA

Current alias directory path:

ASM/ASMPARAMETERFILE

Current alias directory path:

ORCL/DATAFILE

Current alias directory path:

ORCL/TEMPFILE

Current alias directory path:

ORCL/CONTROLFILE

Current alias directory path:

ORCL/PARAMETERFILE

Current alias directory path: ASM

Current alias directory path:

ORCL/ONLINELOG

Current alias directory path: ORCL

Current alias directory path:

ORCL/CONTROLFILE

Current alias directory path:

ORCL/ARCHIVELOG/2009_07_13

Current alias directory path:

ORCL/BACKUPSET/2009_07_14

Current alias directory path:

ORCL/ARCHIVELOG/2009_07_14

Current alias directory path: ORCL

Current alias directory path:

ORCL/DATAFILE

Current alias directory path:

ORCL/ARCHIVELOG

Current alias directory path:

ORCL/BACKUPSET

Current alias directory path:

ORCL/ONLINELOG

2.2 备份所有mount磁盘组

ASMCMD [+] > md_backup /home/grid/yaogangdb.md

Disk group metadata to be backed up: FFFNORMAL

Disk group metadata to be backed up: OCRDG

Current alias directory path: smedb-cluster/OCRFILE

Current alias directory path: smedb-cluster

Current alias directory path:

smedb-cluster/ASMPARAMETERFILE

2.3 备份指定磁盘组

ASMCMD [+] > md_backup /home/grid/yaogang_ocrdg.md -G

ocrdg

Disk group metadata to be backed up: OCRDG

Current alias directory path: smedb-cluster/OCRFILE

Current alias directory path: smedb-cluster

Current alias directory path:

smedb-cluster/ASMPARAMETERFILE

3 md_restore操作

3.1 md_restore命令介绍

ASMCMD [+] > help md_restore

md_restore

This command restores a disk group metadata

backup.

md_restore backup_file

[--silent][--full|--nodg|--newdg -o 'old_diskgroup:new_diskgroup

[,...]'][-S sql_script_file] [-G 'diskgroup [,diskgroup...]']

The options for the md_restore command are

described below.

backup_file - Reads the metadata

information from

backup_file.

--silent - Ignore

errors. Normally, if md_restore

encounters an error, it will

stop.

Specifying this flag ignores

any errors.

--full - Specifies to create a disk group and

restore

metadata.

--nodg - Specifies to restore metadata only.

--newdg -o old_diskgroup:new_diskgroup

- Specifies to create a

disk

group with a different name

when restoring

metadata. The -o option is

required

with --newdg.

-S sql_script_file - Write SQL commands to the

specified SQL

script file instead of

executing the commands.

-G diskgroup - Select the disk groups to be

restored.

If no disk groups are

defined, then all

disk groups will be

restored.

The first example restores the disk group DATA

from the backup script

and creates a copy. The second example takes an

existing disk group

DATA and restores its metadata. The third

example restores disk group

DATA completely but the new disk group that is

created is called DATA2.

The fourth example restores from the backup file

after applying the

overrides defined in the override.sql script

file

ASMCMD [+] > md_restore --full -G data

--silent /tmp/dgbackup20090714

ASMCMD [+] > md_restore --nodg -G data

--silent /tmp/dgbackup20090714

ASMCMD [+] > md_restore --newdg -o

'data:data2' --silent /tmp/dgbackup20090714

ASMCMD [+] > md_restore -S override.sql

--silent /tmp/dgbackup20090714

3.2 生产sql文件(未执行)

ASMCMD [+] > md_restore -S

/tmp/get_ocrdg_sql -G ocrdg

/home/grid/yaogang_ocrdg.md

Current Diskgroup metadata being restored: OCRDG

3.3 显示生产sql文本内容

[grid@db1 ~]$ cat /tmp/get_ocrdg_sql

create diskgroup OCRDG EXTERNAL redundancy

disk 'ORCL:CRS2' name CRS2 size 1908M

disk 'ORCL:CRS3' name CRS3 size 1908M

disk 'ORCL:CRS1' name CRS1 size 1907M attribute

'compatible.asm' = '11.2.0.0.0', 'compatible.rdbms' =

'10.1.0.0.0';

alter diskgroup OCRDG set attribute '_._DIRVERSION' =

'11.2.0.0.0';

alter diskgroup OCRDG alter template "ARCHIVELOG" attributes

(UNPROTECTED COARSE);

alter diskgroup OCRDG alter template "BACKUPSET" attributes

(UNPROTECTED COARSE);

alter diskgroup OCRDG alter template "FLASHBACK" attributes

(UNPROTECTED COARSE);

alter diskgroup OCRDG alter template "OCRFILE" attributes

(UNPROTECTED COARSE);

alter diskgroup OCRDG alter template "PARAMETERFILE"