ACFS 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 – 12.1.0.2
NODES – NODE3 , NODE4
OS – Linux OEL
1.Create an ASM DISKGROUP( ON NODE 3)
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 4)
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 node3 STABLE ONLINE ONLINE node4 STABLE --------------------------------------------------------------------------------
4. Create a new ADVM volume in the diskgroup(ACFSPOC):(ON NODE 3)
ASMCMD> volcreate -G ACFSPOC -s 50G SHAREDVOL1
ASMCMD> volinfo --all Diskgroup Name: ACFSPOC Volume Name: SHAREDVOL2 Volume Device: /dev/asm/sharedvol2-201 --- >> This is the volume device State: ENABLED Size (MB): 51200 Resize Unit (MB): 512 Redundancy: UNPROT Stripe Columns: 8 Stripe Width (K): 1024 Usage: Mountpath: oracle@NODE4:~$ crsctl stat res ora.ACFSPOC.SHAREDVOL2.advm -t -------------------------------------------------------------------------------- Name Target State Server State details -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.ACFSPOC.SHAREDVOL1.advm ONLINE ONLINE NODE3 STABLE ONLINE ONLINE NODE4 STABLE
5. create mount point with proper permission on both nodes:
------- node 3:(from root) mkdir /acfspoc chown oracle:oinstall /acfspoc --------from node 4 also: mkdir /acfspoc chown oracle:oinstall /acfspoc
6.Create ACFS FILESYSTEM In the ADVM VOLUME (On node 3) ( as grid owner)
$ /sbin/mkfs -F acfs /dev/asm/sharedvol2-201 mkfs: version = 12.1.0.2.0 mkfs: on-disk version = 39.0 mkfs: volume = /dev/asm/sharedvol2-201 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/sharedvol2-201
7.Register the ACFS file system with CRS:
export ORACLE_HOME=/crsapp/app/oracle/product/grid12c -- Run from root root@NODE3:~# $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.sharedvol2.acfs -t -------------------------------------------------------------------------------- Name Target State Server State details -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.acfspoc.sharedvol1.acfs OFFLINE OFFLINE NODE3 STABLE OFFLINE OFFLINE NODE4 STABLE --------------------------------------------------------------------------------
8. Start the ACFS file system resource:( on node 3 from the root)
root@NODE3:~# $ORACLE_HOME/bin/srvctl start filesystem -d /dev/asm/sharedvol2-201 ---- 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 NODE3 mounted on /acfspoc, STABLE ONLINE ONLINE NODE4 mounted on /acfspoc, STABLE -------------------------------------------------------------------------------- $ srvctl config filesystem Volume device: /dev/asm/sharedvol2-201 Canonical volume device: /dev/asm/sharedvol2-201 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@NODE3$ df -kh /acfspoc Filesystem Size Used Available Capacity Mounted on /dev/asm/sharedvol1-201 50G 178M 50G 1% /acfspoc oracle@NODE4:/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 node3 and check whether the same is available on node 4.
oracle@NODE3:/acfspoc$ touch test.log oracle@NODE3:/acfspoc$ ls -ltr total 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@NODE4:~$ cd /acfspoc/ oracle@NODE4:/acfspoc$ ls -ltr total 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.
