ACFS i.e Oracle aSM Cluster File System is cluster file system service used for High availability services.

Example – For achieving high availability in goldenate for Oracle RAC, we can use ACFS for goldengate relate files.

In this article, we will show how to create a ACFS file system In Oracle RAC using command line.

ENVIRONMENT DETAILS:

OracLE GRID VERSION – 12.1.0.2NODES               – NODE1 , NODE2OS                  – SOLARIS SPARC

1. Create an ASM DISKGROUP( ON NODE 1)

echo $OracLE_HOME
/crsapp/app/Oracle/product/grid12c

echo $oracle_sid
+ASM1

sqlplus / as sysasm


SQL> CREATE DISKGROUP ACFSPOC EXTERNAL REDUNDANCY
DISK '/dev/rdsk/c0t514F0C5785C00A0Bd0s6' SIZE 269G
ATTRIBUTE 'compatible.asm' = '12.1.0.0.0',
'compatible.rdbms'='12.1.0.0.0' ,
'compatible.advm' = '12.1.0.0.0';


Diskgroup created.

2. Mount the diskgroup from other nodes(On NODE 2)

echo $OracLE_HOME
/crsapp/app/Oracle/product/grid12c

echo $oracle_sid
+ASM2

asmcmd

ASMCMD> mount ACFSPOC

3. check the diskgroup status( from any nodE)

SQL> SQL> set lines 299
SQL> SELEct GROUP_numbER,NAME,COMPATIBILITY,DATABASE_COMPATIBILITY from gv$asm_diskgroup where NAME='ACFSPOC';

GROUP_numbER NAME COMPATIBILITY DATABASE_COMPATIBILITY
------------ ------------------------------ ------------------------------------------------------------ ------------------------------------------------------------
13 ACFSPOC 12.1.0.0.0 12.1.0.0.0
13 ACFSPOC 12.1.0.0.0 12.1.0.0.0



$ crsctl stat res ora.ACFSPOC.dg -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local resources
--------------------------------------------------------------------------------
ora.ACFSPOC.dg
ONLINE ONLINE node1 STABLE
ONLINE ONLINE node2 STABLE
--------------------------------------------------------------------------------

4. Create a new ADVM volume in the diskgroup(ACFSPOC):(ON NODE 1)

ASMCMD> volcreate -G ACFSPOC -s 50G SHAREDVOL1

ASMCMD> volinfo --all
Diskgroup Name: ACFSPOC

Volume Name: SHAREDVOL1
Volume Device: /dev/asm/sharedvol1-201 --- >> This is the volume device
State: ENABLED
Size (MB): 51200
Resize Unit (MB): 512
Redundancy: UNPROT
@R_772_10495@pe columns: 8
@R_772_10495@pe Width (K): 1024
Usage:
Mountpath:


Oracle@NODE2:~$ crsctl stat res ora.ACFSPOC.SHAREDVOL1.advm -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local resources
--------------------------------------------------------------------------------
ora.ACFSPOC.SHAREDVOL1.advm
ONLINE ONLINE NODE1 STABLE
ONLINE ONLINE NODE2 STABLE

5. create mount point with proper permission on both nodes:

------- node 1:(from root)

mkdir /ACFSpoc
chown Oracle:oinstall /ACFSpoc


--------from node 2 also:

mkdir /ACFSpoc
chown Oracle:oinstall /ACFSpoc

6.Create ACFS FILESYSTEM In the ADVM VOLUME (On node 1) ( as grid owner)

$ /sbin/mkfs -F ACFS /dev/asm/sharedvol1-201
mkfs: version = 12.1.0.2.0
mkfs: on-disk version = 39.0
mkfs: volume = /dev/asm/sharedvol1-201
mkfs: volume size = 53687091200 ( 50.00 GB )
mkfs: Format complete.

NOTE – In case of linux the command will be /sbin/mkfs -t ACFS /dev/asm/sharedvol1-201

 

7.Register the ACFS file system with CRS:

export OracLE_HOME=/crsapp/app/Oracle/product/grid12c

-- Run from root

root@NODE1:~# $OracLE_HOME/bin/srvctl add filesystem -d /dev/asm/sharedvol1-201 -m /ACFSpoc -u Oracle -fstype ACFS -autostart ALWAYS


-- check the resource status

$ crsctl stat res ora.ACFSpoc.sharedvol1.ACFS -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local resources
--------------------------------------------------------------------------------
ora.ACFSpoc.sharedvol1.ACFS
OFFLINE OFFLINE NODE1 STABLE
OFFLINE OFFLINE NODE2 STABLE
--------------------------------------------------------------------------------

8. Start the ACFS file system resource:( on node 1 from the root)

root@NODE1:~# $OracLE_HOME/bin/srvctl start filesystem -d /dev/asm/sharedvol1-201


---- check the status

$ crsctl stat res ora.ACFSpoc.sharedvol1.ACFS -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local resources
--------------------------------------------------------------------------------
ora.ACFSpoc.sharedvol1.ACFS
ONLINE ONLINE NODE1 mounted on /ACFSpoc,
STABLE
ONLINE ONLINE NODE2 mounted on /ACFSpoc,
STABLE
--------------------------------------------------------------------------------




$ srvctl config filesystem
Volume device: /dev/asm/sharedvol1-201
Canonical volume device: /dev/asm/sharedvol1-201
Auxiliary volume devices:
Mountpoint path: /ACFSpoc
User: Oracle
Type: ACFS
Mount options:
Description:
ACFS file system is enabled
ACFS file system is individually enabled on nodes:
ACFS file system is individually disabled on nodes:

9. Now validate the ACFS mount points

Oracle@NODE1$ df -kh /ACFSpoc
Filesystem Size Used Available Capacity Mounted on
/dev/asm/sharedvol1-201
50G 178M 50G 1% /ACFSpoc


Oracle@NODE2:/ACFSpoc$ df -kh /ACFSpoc
Filesystem Size Used Available Capacity Mounted on
/dev/asm/sharedvol1-201
50G 178M 50G 1% /ACFSpoc

Try creaTing a test file on node1 and check whether the same is available on node 2.

Oracle@NODE1:/ACFSpoc$ touch test.log

Oracle@NODE1:/ACFSpoc$ ls -ltr
@R_737_10586@l 128
drwx------ 2 root root 65536 Oct 30 10:34 lost+found
-rw-r--r-- 1 Oracle oinstall 0 Oct 30 10:39 test.log



Oracle@NODE2:~$ cd /ACFSpoc/
Oracle@NODE2:/ACFSpoc$ ls -ltr
@R_737_10586@l 128
drwx------ 2 root root 65536 Oct 30 10:34 lost+found
-rw-r--r-- 1 Oracle oinstall 0 Oct 30 10:39 test.log

We have successfully created the ACFS file system in a two node RAC.

In this next article, we will show, How to create the ACFS file system using ASMCA GUI utility.