You are hereASM Dynamic Volume Manager (ADVM) and ASM Clustered File System (ACFS)

ASM Dynamic Volume Manager (ADVM) and ASM Clustered File System (ACFS)


By surachart - Posted on 05 September 2009

11gR2 feature... ASM Dynamic Volume Manager (ADVM) and ASM Clustered File System (ACFS)

We can create ACFS by using asmca (link). and we can use command-lines(sql*plus, asmcmd) as well.

- Create a volume from an ASM diskgroup

Connect sql*plus with sysasm:
$ sqlplus / as sysasm

Add volume by "alter diskgroup":

SQL> alter diskgroup DISK03 add volume 'asm_vol1' size 5G;

Diskgroup altered.

Check :

SQL> SELECT dg.name AS diskgroup, v.volume_name, v.bytes_read, v.bytes_written FROM V$ASM_DISKGROUP dg, V$ASM_VOLUME_STAT v WHERE dg.group_number = v.group_number;

DISKGROUP VOLUME_NAME BYTES_READ BYTES_WRITTEN
------------------------------ ------------------------------ ---------- -------------
DISK03 ASM_VOL1 0 0

SQL> SELECT dg.name AS diskgroup, v.volume_name, v.volume_device, v.mountpath,v.state FROM V$ASM_DISKGROUP dg, V$ASM_VOLUME v WHERE dg.group_number = v.group_number;

DISKGROUP VOLUME_NAM VOLUME_DEVICE MOUNTPATH STATE
---------- ---------- ------------------------------ ------------------------------ --------
DISK03 ASM_VOL1 /dev/asm/asm_vol1-15 DISABLED

Or... use "asmcmd"

ASMCMD> volcreate -G DISK03 -s 5G asm_vol1

ASMCMD> volstat

DISKGROUP NUMBER / NAME: 3 / DISK03
---------------------------------------
VOLUME_NAME
READS BYTES_READ READ_TIME READ_ERRS
WRITES BYTES_WRITTEN WRITE_TIME WRITE_ERRS
-------------------------------------------------------------
ASM_VOL1
0 0 0 0
0 0 0 0

ASMCMD> volinfo -G DISK03 asm_vol1
Diskgroup Name: DISK03

Volume Name: ASM_VOL1
Volume Device: /dev/asm/asm_vol1-15
State: DISABLED
Size (MB): 5120
Resize Unit (MB): 256
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage:
Mountpath:

- Enable "asm_vol1' volume

SQL> !ls -l /dev/asm/asm_vol1-15
ls: /dev/asm/asm_vol1-15: No such file or directory

SQL> alter diskgroup DISK03 enable volume 'asm_vol1';

Diskgroup altered.

SQL> !ls -l /dev/asm/asm_vol1-15
brwxrwx--- 1 root osasm 252, 7681 Sep 4 11:26 /dev/asm/asm_vol1-15

SQL> SELECT dg.name AS diskgroup, v.volume_name, v.volume_device, v.mountpath,v.state FROM V$ASM_DISKGROUP dg, V$ASM_VOLUME v WHERE dg.group_number = v.group_number;

DISKGROUP VOLUME_NAM VOLUME_DEVICE MOUNTPATH STATE
---------- ---------- ------------------------------ ------------------------------ --------
DISK03 ASM_VOL1 /dev/asm/asm_vol1-15 ENABLED

Or... use "asmcmd"

$ ls -l /dev/asm/asm_vol1-15
ls: /dev/asm/asm_vol1-15: No such file or directory

ASMCMD> volenable -G DISK03 asm_vol1

ASMCMD> volinfo -G DISK03 asm_vol1
Diskgroup Name: DISK03

Volume Name: ASM_VOL1
Volume Device: /dev/asm/asm_vol1-15
State: ENABLED
Size (MB): 5120
Resize Unit (MB): 256
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage:
Mountpath:

$ ls -l /dev/asm/asm_vol1-15
brwxrwx--- 1 root osasm 252, 7681 Sep 4 11:43 /dev/asm/asm_vol1-15

- Register mount point

$ mkdir -p /oracle/product/acfsmounts/disk03_asm_vol1

$ su - root

# acfsutil registry -a -f /dev/asm/asm_vol1-15 /oracle/product/acfsmounts/disk03_asm_vol1
acfsutil registry: mount point /oracle/product/acfsmounts/disk03_asm_vol1 successfully added to Oracle Registry

# mount.acfs -o all
mount.acfs: ACFS-00591: error found in volume disk header
mount.acfs: ACFS-02037: File system not created on a Linux system. Cannot mount.

found error... so(make acfs)

# mkfs.acfs -f /dev/asm/asm_vol1-15
mkfs.acfs: version = 11.2.0.1.0.0
mkfs.acfs: on-disk version = 39.0
mkfs.acfs: volume = /dev/asm/asm_vol1-15
mkfs.acfs: volume size = 5368709120
mkfs.acfs: Format complete.

And mount:

# mount.acfs -o all

Or mount.acfs /dev/asm/asm_vol1-15 /oracle/product/acfsmounts/disk03_asm_vol1/

Check...

# df
Filesystem 1K-blocks Used Available Use% Mounted on

/dev/asm/asm_vol1-15 5242880 47512 5195368 1% /oracle/product/acfsmounts/disk03_asm_vol1

- Test create file

# cd /oracle/product/acfsmounts/disk03_asm_vol1
# ls -la
drwxr-xr-x 5 root root 4096 Sep 4 11:54 .ACFS

# touch file.txt
# ls file.txt
file.txt

- Check Again

SQL> SELECT dg.name AS diskgroup, v.volume_name, v.volume_device, v.mountpath,v.state FROM V$ASM_DISKGROUP dg, V$ASM_VOLUME v WHERE dg.group_number = v.group_number;

DISKGROUP VOLUME_NAM VOLUME_DEVICE MOUNTPATH STATE
---------- ---------- ------------------------------ ------------------------------------------ --------
DISK03 ASM_VOL1 /dev/asm/asm_vol1-15 /oracle/product/acfsmounts/disk03_asm_vol1 ENABLED

SQL> SELECT dg.name AS diskgroup, v.volume_name, v.bytes_read, v.bytes_written FROM V$ASM_DISKGROUP dg, V$ASM_VOLUME_STAT v WHERE dg.group_number = v.group_number;

DISKGROUP VOLUME_NAM BYTES_READ BYTES_WRITTEN
---------- ---------- ---------- -------------
DISK03 ASM_VOL1 372736 11745280

Or... use"asmcmd"

ASMCMD> volinfo -G DISK03 asm_vol1
Diskgroup Name: DISK03

Volume Name: ASM_VOL1
Volume Device: /dev/asm/asm_vol1-15
State: ENABLED
Size (MB): 5120
Resize Unit (MB): 256
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage: ACFS
Mountpath: /oracle/product/acfsmounts/disk03_asm_vol1

ASMCMD> volstat

DISKGROUP NUMBER / NAME: 3 / DISK03
---------------------------------------
VOLUME_NAME
READS BYTES_READ READ_TIME READ_ERRS
WRITES BYTES_WRITTEN WRITE_TIME WRITE_ERRS
-------------------------------------------------------------
ASM_VOL1
416 372736 6 0
2941 11745280 242 0

By: Surachart
http://surachartopun.com



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