How to Create Drop ( Remove ) or Resize ACFS File System in Oracle

I will explain How to Create Drop ( Remove ) or Resize ACFS File System in Oracle in this post.

Create Drop ( Remove ) or Resize ACFS File System

You can read the following post before this post to learn more details about What is the Oracle ASM Cluster file system.

What is the Oracle ASM Cluster Filesystem (ACFS) and How to Create ACFS

Create ACFS File System

ACFS can be created via asmcmd,asmca and Enterprise manager tool.

You can create and mount ACFS disk via asmcmd like following.

Step-1: Login asmcmd tool and create ACFS volume like following.

[grid@MehmetSalih01 .ssh]$ asmcmd

ASMCMD> volcreate -G RECO -s 10000G ACFS_VOL1
ASMCMD> 
ASMCMD>

Step 2: List and check it if it is created or not.

ASMCMD> volinfo --all
Diskgroup Name: RECO

Volume Name: ACFS_VOL1
Volume Device: /dev/asm/acfs_vol1-375
State: ENABLED
Size (MB): 10240000
Resize Unit (MB): 512
Redundancy: HIGH
Stripe Columns: 8
Stripe Width (K): 1024
Usage: 
Mountpath: 

ASMCMD> exit
[grid@MehmetSalih01 .ssh]$

Step -3: Create a file system on the ACFS volume.

[grid@MehmetSalih01 .ssh]$ 
[grid@MehmetSalih01 .ssh]$ 
[grid@MehmetSalih01 .ssh]$ /sbin/mkfs -t acfs /dev/asm/acfs_vol1-375
mkfs.acfs: version = 12.2.0.1.0
mkfs.acfs: on-disk version = 46.0
mkfs.acfs: volume = /dev/asm/acfs_vol1-375
mkfs.acfs: volume size = 10737418240000 ( 9.77 TB )
mkfs.acfs: Format complete.
[grid@MehmetSalih01 .ssh]$ 
[grid@MehmetSalih01 .ssh]$ 
[grid@MehmetSalih01 .ssh]$ 
[grid@MehmetSalih01 .ssh]$ exit
logout
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]#

Step -4: Login with root user, set ASM profile, Add and register this filesystem to CRS.

[root@MehmetSalih01 ~]# . oraenv
ORACLE_SID = [root] ? +ASM1
The Oracle base has been set to /u01/app/grid
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]# mkdir /backup
[root@MehmetSalih01 ~]# $ORACLE_HOME/bin/srvctl add filesystem -d /dev/asm/acfs_vol1-375 -m /backup -u grid -fstype ACFS -autostart ALWAYS
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]#

Step -5: Check mount point before start and mount this file system. ACFS does not exist now.

[root@MehmetSalih01 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VGExaDb-LVDbSys1
                       30G   22G  4.7G  84% /
tmpfs                 755G  617M  754G   1% /dev/shm
/dev/sda1             488M   28M  425M   7% /boot
/dev/mapper/VGExaDb-LVDbOra1
                       99G   74G   21G  79% /u01
/dev/sda2             254M   24M  231M  10% /boot/efi
[root@MehmetSalih01 ~]#

Mount and Start ACFS 

Step 6: Start filesystem and Mount it like following.

[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]# $ORACLE_HOME/bin/srvctl start filesystem -d /dev/asm/acfs_vol1-375
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]# 
[root@MehmetSalih01 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VGExaDb-LVDbSys1
                       30G   22G  4.7G  84% /
tmpfs                 755G  617M  754G   1% /dev/shm
/dev/sda1             488M   28M  425M   7% /boot
/dev/mapper/VGExaDb-LVDbOra1
                       99G   74G   21G  79% /u01
/dev/sda2             254M   24M  231M  10% /boot/efi
/dev/asm/acfs_vol1-375
                      9.8T   22G  9.8T   1% /backup
[root@MehmetSalih01 ~]#

Resize ACFS File system

You can resize the ACFS File system using /sbin/acfsutil tool as follows.

[grid@MehmetSalih01 ~]$ /sbin/acfsutil size 35000G /backup
acfsutil size: Resizing file system in steps
acfsutil size: Resizing file system to 19.8906 TB
acfsutil size: Resizing file system to 19.9063 TB
-acfsutil size: Resizing file system to 19.9219 TB
acfsutil size: Resizing file system to 19.9375 TB
acfsutil size: Resizing file system to 19.9531 TB
-acfsutil size: Resizing file system to 19.9688 TB
acfsutil size: Resizing file system to 19.9844 TB
acfsutil size: Resizing file system to 20.0000 TB
acfsutil size: Resizing file system to 20.0156 TB

Start & Stop ACFS File system

You can start and stop ACFS as follows.

[root@MehmetSalih01 ~]# $ORACLE_HOME/bin/srvctl stop filesystem -d /dev/asm/acfs_vol1-375 [root@MehmetSalih01 ~]#

[root@MehmetSalih01 ~]# $ORACLE_HOME/bin/srvctl start filesystem -d /dev/asm/acfs_vol1-375 [root@MehmetSalih01 ~]#

Disable ACFS

You can disable the ACFS as follows.

ASMCMD> voldisable -G RECO ACFS_VOL1

Mount & Umount ACFS File system

You can mount and umount ACFS file system as follows.

mount -t acfs /dev/asm/acfs_vol1-375 /backup

umount /backup

Drop ( Remove ) ACFS File System

To drop or remove ACFS file system, you should stop it. You can Drop or Remove ACFS File system as follows.

[root@MehmetSalih01 ~]# $ORACLE_HOME/bin/srvctl stop filesystem -d /dev/asm/acfs_vol1-375 [root@MehmetSalih01 ~]#

Then delete the Volume group as follows.

ASMCMD> voldelete -G RECO ACFS_VOL1

Removing ACFS

If you want to learn What is the Oracle RAC and how to install Oracle RAC, you can read the following post.

Oracle RAC Step by Step Installation on Linux -3

Do you want to learn Oracle Database for Beginners, then Click and read the following articles.

Oracle Database Tutorials for Beginners ( Junior Oracle DBA )