Oracle® Database Storage Administrator's Guide 11g Release 2 (11.2) Part Number E10500-02 |
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This section describes the ASMCMD volume management commands.
For information about Oracle ASM Dynamic Volume Manager (Oracle ADVM), see "Overview of Oracle ASM Dynamic Volume Manager".
Table 12-65 provides a summary of the Oracle ADVM volume management commands. To successfully execute these commands, the local Oracle ASM instance must be running and the disk group required by this command must have been created and mounted in the Oracle ASM instance.
Table 12-65 Summary of ASMCMD Volume Management Commands
Command | Description |
---|---|
Creates an Oracle ADVM volume in the specified disk group. |
|
Deletes an Oracle ADVM volume. |
|
Disables Oracle ADVM volumes in mounted disk groups. |
|
Enables Oracle ADVM volumes in mounted disk groups. |
|
Displays information about Oracle ADVM volumes. |
|
Resizes an Oracle ADVM volume. |
|
Sets attributes of an Oracle ADVM volume in mounted disk groups. |
|
Reports volume I/O statistics. |
Purpose
Creates an Oracle ADVM volume in the specified disk group.
Syntax and Description
volcreate
-G
diskgroup
-s
size
[
--column
number
]
[
--width
stripe_width
]
[--redundancy
{high
|mirror
|unprotected
} ]
[--primary
{hot
|cold
}] [--secondary
{hot
|cold
}] volume
Table 12-66 describes the options for the volcreate
command.
Table 12-66 Options for the volcreate command
Option | Description |
---|---|
|
Name of the disk group containing the volume. |
|
Size of the volume to be created in units of |
|
Number of columns in a stripe set. Values range from 1 to |
|
Stripe width of a volume. The value can range from 4 KB to 1 MB, at power-of-two intervals, with a default of 128 KB. |
|
Redundancy of the Oracle ADVM volume which can be specified for normal redundancy disk groups. The range of values are as follows: |
|
Intelligent Data Placement specification for primary extents, either |
|
Intelligent Data Placement specification for secondary extents, either |
|
Name of the volume to be created. Can be a maximum of 11 alphanumeric characters; dashes are not allowed. The first character must be alphabetic. |
When creating an Oracle ADVM volume, a volume device name is created with a unique Oracle ADVM persistent disk group number that is concatenated to the end of the volume name. The unique number can be one to three digits.
On Linux, the volume device name is in the format volume_name
-
nnn
. On Windows the volume device name is in the format asm-
volume_name
-
nnn
. The volume device file can be used as any other disk or logical volume to mount file systems or for applications to use directly. For information on mounting the volume device file, see "Creating an Oracle ACFS File System".
You can determine the volume device name with the volinfo
command, described in "volinfo".
A successful volume creation automatically enables the volume device.
The volume device file can be used as any other disk or logical volume to mount file systems or for applications to use directly.
Examples
The following is an example of the volcreate
command that creates volume1
in the data
disk group with the size set to 10 gigabytes.
Example 12-66 Using volcreate
ASMCMD [+] > volcreate -G data -s 10G --width 64K --column 8 volume1 ASMCMD [+] > volinfo -G data volume1 Diskgroup Name: DATA Volume Name: VOLUME1 Volume Device: /dev/asm/volume1-123 State: ENABLED Size (MB): 10240 Resize Unit (MB): 512 Redundancy: MIRROR Stripe Columns: 8 Stripe Width (K): 64 Usage: Mountpath:
Purpose
Deletes an Oracle ADVM volume.
Syntax and Description
voldelete
-G
diskgroup
volume
Table 12-67 describes the options for the voldelete
command.
Table 12-67 Options for the voldelete command
Option | Description |
---|---|
|
Name of the disk group containing the volume. |
|
Name of the volume to be operated on. |
To successfully execute this command, the local Oracle ASM instance must be running and the disk group required by this command must be mounted in the Oracle ASM instance. Before deleting a volume, you must ensure that there are no active file systems associated with the volume.
Examples
The following is an example of the voldelete
command that deletes volume1
from the data
disk group.
Purpose
Disables Oracle ADVM volumes in mounted disk groups and removes the volume device on the local node.
Syntax and Description
voldisable
{ -a
| -G
diskgroup
-a
| -G
diskgroup
volume
}Table 12-68 describes the options for the voldisable
command.
Table 12-68 Options for the voldisable command
Option | Description |
---|---|
|
When used without a disk group name, specifies all volumes within all disk groups. When used with a disk group name ( |
|
Name of the disk group containing the volume. |
|
Name of the volume to be operated on. Can be maximum of 30 alphanumeric characters. The first character must be alphabetic. |
You can disable volumes before shutting down an Oracle ASM instance or dismounting a disk group to verify that the operations can be accomplished normally without including a force option due to open volume files. Disabling a volume also prevents any subsequent opens on the volume or device file as it no longer exists.
Before disabling a volume, you must ensure that there are no active file systems associated with the volume. You must first dismount the Oracle ACFS file system before disabling the volume. See "Dismounting an Oracle ACFS File System".
You can delete a volume without first disabling the volume.
Examples
The following is an example of the voldisable
command that disables volume1
in the data
disk group.
Purpose
Enables Oracle ADVM volumes in mounted disk groups.
Syntax and Description
volenable
{ -a
| -G
diskgroup
-a
| -G
diskgroup
volume
}Table 12-69 describes the options for the volenable
command.
Table 12-69 Options for the volenable command
Option | Description |
---|---|
|
When used without a disk group name, specifies all volumes within all disk groups. When used with a disk group name ( |
|
Name of the disk group containing the volume. |
|
Name of the volume to be operated on. |
A volume is enabled when it is created.
Examples
The following is an example of the volenable
command that enables volume1
in the data
disk group.
Purpose
Displays information about Oracle ADVM volumes.
Syntax and Description
volinfo
{ -a
| -G
diskgroup
-a
| -G
diskgroup
volume
}volinfo
[--show_diskgroup
|--show_volume
] volumedevice
}Table 12-70 describes the options for the volinfo
command.
Table 12-70 Options for the volinfo command
Option | Description |
---|---|
|
When used without a disk group name, specifies all volumes within all disk groups. When used with a disk group name ( |
|
Name of the disk group containing the volume. |
|
Name of the volume. |
|
Returns only the disk group name. A volume device name is required. |
|
Returns only the volume name. A volume device name is required. |
|
Name of the volume device. |
Examples
The following example displays information about the volume1
volume in the data
disk group.
Example 12-70 Using volinfo
ASMCMD [+] > volinfo -G data volume1 Diskgroup Name: DATA Volume Name: VOLUME1 Volume Device: /dev/asm/volume1-123 State: ENABLED Size (MB): 10240 Resize Unit (MB): 512 Redundancy: MIRROR Stripe Columns: 8 Stripe Width (K): 64 Usage: ACFS Mountpath: /u01/app/acfsmounts/acfs1
Purpose
Resizes an Oracle ADVM volume.
Syntax and Description
volresize
-G
diskgroup
-s
size
[
-f
]
volume
Table 12-71 describes the options for the volresize
command.
Table 12-71 Options for the volresize command
Option | Description |
---|---|
|
Name of the disk group containing the volume. |
|
Force the shrinking of a volume that is not an Oracle ACFS volume to suppress the warning message. |
|
Name of the volume to be operated on. |
|
New size of the volume in units of |
If the volume is not an Oracle ACFS volume and the new size is smaller than current, you are warned of possible data corruption. Unless the -f
(force) option is specified, you are prompted whether to continue with the operation.
If there is an Oracle ACFS file system on the volume you cannot resize the volume with the volresize
command. You must use the acfsutil
size
command, which also resizes the volume and file system. For information, see "acfsutil size".
Examples
The following is an example of the volresize
command that resizes volume1
in the data
disk group to 20 gigabytes.
Purpose
Sets attributes of an Oracle ADVM volume in mounted disk groups.
Syntax and Description
volset
-G
diskgroup
[
--usagestring
string
]
[
--mountpath
mount_path
]
[--primary
{hot
|cold
}] [--secondary
{hot
|cold
}] volume
Table 12-72 describes the options for the volset
command.
Table 12-72 Options for the volset command
Option | Description |
---|---|
|
Name of the disk group containing the volume. |
|
Optional usage string to tag a volume which can be up to 30 characters. This string is set to |
|
Optional string to tag a volume with its mount path string which can be up to 1024 characters. This string is for user information only. |
|
Intelligent Data Placement specification for primary extents, either |
|
Intelligent Data Placement specification for secondary extents, either |
|
Name of the volume to be operated on. |
Examples
The following is an example of the volset
command that sets the usage string for a volume that is not attached to a file system.
Purpose
Reports I/O statistics for Oracle ADVM volumes.
Syntax and Description
volstat
[-G
diskgroup
] [volume
]
Table 12-73 describes the options for the volstat
command.
Table 12-73 Options for the volstat command
Option | Description |
---|---|
|
Name of the mounted disk group containing the volume. |
|
Name of the volume to be operated on. |
The following apply when using the volstat
command.
If the disk group is not specified and the volume name is specified, all mounted disk groups are searched for the specified volume name.
If the disk group name is specified and the volume name is omitted, all volumes are displayed for the named disk group.
If both the disk group name and the volume name are omitted, all volumes on all disk groups are displayed.
Examples
The following is an example of the volstat
command that displays information about volumes in the data
disk group.
Example 12-73 Using volstat
ASMCMD [+] > volstat -G data DISKGROUP NUMBER / NAME: 1 / DATA --------------------------------------- VOLUME_NAME READS BYTES_READ READ_TIME READ_ERRS WRITES BYTES_WRITTEN WRITE_TIME WRITE_ERRS ------------------------------------------------------------- VOLUME1 10085 2290573312 22923 0 1382 5309440 1482 0