Oracle ASM Operation Management

View the ASM disk status

SQL> select group_number, disk_number, mount_status, header_status, mode_status, state, failgroup, total_mb, free_mb, name, path from v $ asm_disk;

View the situation of the ASM disk group
SQL> select group_number, block_size, name, allocation_unit_size, state, type, total_mb, free_mb, offline_disks from v $ asm_diskgroup;

Create an ASM Disk

[Root @ b1 redhat 5.4-64] #

[Root @ b1 redhat 5.4-64] #

[Root @ b1 redhat 5.4-64] #
Device "/dev/sdb" is not marked as an ASM disk
Device "/dev/sdb1" is marked an ASM disk with the label "DISK1"
Device "/dev/sdb2" is marked an ASM disk with the label "DISK2"

[Root @ b1 redhat 5.4-64] #
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
[Root @ b1 redhat 5.4-64] #
DISK1
DISK2

 

Delete An ASM Disk

[Root @ b1 ~] #
Clearing disk header: done

Create an ASM disk group

A. Create an outsourced redundant disk group

B. Create a common redundant disk group (at least two disks)

Create diskgroup dg1 normal redundancy failgroup fg1 disk 'ORCL: disk3 'failgroup fg2 disk' ORCL: disk4 ';

C. Create a high-redundancy disk group (at least three disks)

Create diskgroup dg1 high redundancy
Failgroup fg1 disk 'ORCL: disk3 'name dg1_a
Failgroup fg2 disk 'ORCL: disk4 'name dg1_ B
Failgroup fg3 disk 'ORCL: disk5 'name dg1_c;

Delete An ASM disk group

Drop diskgroup dg1;

Drop diskgroup dg1 including contents;

 

Add a disk to the ASM disk group

A. Add disk members to a high-redundancy disk group

Alter diskgroup dg1
Add failgroup fg1 disk 'orcl: disk1'
Add failgroup fg2 disk 'orcl: diskd2'
Add failgroup fg3 disk 'orcl: diskd3 ';

B. Add disk members to an external redundant disk group.

Alter diskgroup dg2 add disk 'orcl: diske2 ';

 

Delete a disk from the ASM disk group

Alter diskgroup dg1 drop disk diskd1, diskd2, diskd3;

Alter diskgroup dg2 drop disk diske2 add disk 'orcl: diske3 ';

Delete a fault group (delete all disks in the fault group)

Alter diskgroup dg1 drop disks in failgroup fg3;

Add fault group

Alter diskgroup dg1 add failgroup fg3 disk 'orcl: disk5 ';

Add a fault group when deleting a disk

Alter diskgroup dg1 drop disks in failgroup fg3 add failgroup fg4 disk 'orcl: disk6 ';

Stop deleting a disk from a disk group'

Balance Disk Data
Alter diskgroup dg1 rebalance;
Alter diskgroup dg1 rebalance wait;
Alter diskgroup dg1 rebalance power 11;
Stop balancing Disk Data
Alter diskgroup dg1 rebalance power 0;
 
Attach and detach a disk group
Alter diskgroup dg1 mount;
Alter diskgroup dg1 dismount;
Alter diskgroup dg1 dismount force;
Reset disk size
Alter diskgroup dg1 resize all size 512 M; -- set ALL disks in dg1 to 512 M
Alter diskgroup dg1 RESIZE disk diskd4 SIZE 564 M;
Check disk group consistency
Alter diskgroup dg1 check all;
Alter diskgroup dg1 check all repair;
SQL> alter diskgroup DG2 add directory '+ DG2/datafile ';
Rename a directory
SQL> alter diskgroup DG2 rename directory '+ DG2/datafile' to '+ DG2/datafiles ';
Delete directory
SQL> alter diskgroup DG2 drop directory '+ DG2/datafiles ';
 
ASM alias Management
Add an alias to the asm file
SQL> alter diskgroup data add alias '+ data/c1/datafile/system01.dbf' for '+ data/c1/datafile/SYSTEM.260.803945885 ';
Diskgroup altered.
Modify the alias of the asm file
Alter diskgroup data rename alias '+ data/c1/datafile/system01.dbf' to '+ data/c1/datafile/system02.dbf ';
Delete an alias for an asm file
Alter diskgroup DG1 drop alias '+ data/c1/datafile/system02.dbf ';
 
ASM template Management
View the redundancy level and striping of the default asm Template
Select * from v $ asm_template;
View the template to use
Select name, redundancy, striped
From v $ asm_alias a, v $ asm_file B
Where a. file_number = B. file_number
And a. group_number = B. group_number
Order by a. file_number;
Syntax for creating an asm Template
Alter diskgroup disk_group_name add template template_name
ATTRIBUTES ([{MIRROR | HIGH | UNPROTECTED}] [{FINE | COARSE}]);
Create Template
Alter diskgroup dg1 add template template1 attributes (high fine );
Alter diskgroup dg1 add template template2 attributes (unprotected coarse );
Modify template
Alter diskgroup dg1 alter template template1 attributes (coarse );
Delete Template
Alter diskgroup dg1 drop template template1;
Use Template
Create tablespace test datafile '+ DG1 (template1) 'size 50 M;