1. Creating a Volume (ADVM) in a mounted Diskgroup
In this example we will create the volume ADVM_RMAN01 on the Diskgroup OACFS2020_RMAN with a size of 200GB.
Log in with the “grid” user account on one of the nodes of the RAC cluster, and execute the following command:
[grid@ ora_node1 ~]$ asmcmd ASMCMD> volcreate -G OACFS2020_RMAN -s 200G ADVM_RMAN01 Diskgroup Name: OACFS2020_RMAN Volume Name: ADVM_RMAN01 Volume Device: /dev/asm/advm_rman01-20 State: ENABLED Size (MB): 204800 Resize Unit (MB): 32 Redundancy: MIRROR Stripe Columns: 4 Stripe Width (K): 128 Usage: Mountpath:
2. Create a Linux mount point /rman/backup
Execute the following command on all nodes of the RAC clusterÂ
[root@ ora_node1 ~]$ mkdir -p /rman/backup [root@ ora_node2 ~]$ mkdir -p /rman/backup
3. Create a file system with the Oracle ACFS mkfs command
[grid@ ora_node1 ~]$ /sbin/mkfs -t acfs -b 4k /dev/asm/advm_rman01-20 mkfs.acfs: version = 11.2.0.4.0 mkfs.acfs: on-disk version = 39.0 mkfs.acfs: volume = /dev/asm/advm_rman01-20 mkfs.acfs: volume size = 858993459200 mkfs.acfs: Format complete.
4. Register the file system with Oracle ACFSUTIL command
[grid@ ora_node1 ~]$ /sbin/acfsutil registry -f -a /dev/asm/advm_rman01-20 /rman/backup acfsutil registry: mount point /rman/backup successfully added to Oracle Registry
5.Mount the file system with Oracle ACFS mount command
[root@ ora_node1 ~]$ /bin/mount -t acfs /dev/asm/advm_rman01-20 /rman/backup [root@ ora_node2 ~]$ /bin/mount -t acfs /dev/asm/advm_rman01-20 /rman/backup
6. Checking our ACFS creation
When we check the status of our ACFS we can see that the file system has been mounted on both nodes of our Oracle RAC cluster :
[root@ ora_node1 ~]$ df -hP /rman/backup Filesystem Size Used Avail Use% Mounted on /dev/asm/advm_rman01-20 200G 1.0G 199G 1% /rman/backup
And again on the other node :
[root@ ora_node2 ~]$ df -hP /rman/backup Filesystem Size Used Avail Use% Mounted on /dev/asm/advm_rman01-20 200G 1.0G 199G 1% /rman/backup
We can also check our ACFS via SQLPLUS from ASM instance :
[grid@ ora_node1 ~]$ sqlplus sys/password as sysasm
SQL> SET lines 254
col group_number for 999
col group_name for a20
col volume_name for a10
col state for a10
col redundancy for a10
col usage for a10
col volume_device for a25
col volume_name for a25
col mountpath for a25
SELECT a.group_number,
g.name group_name,
a.volume_name,
a.size_mb,
a.volume_device,
a.state,
a.redundancy,
a.usage,
a.mountpath
FROM v$asm_volume a , v$ASM_DISKGROUP g
WHERE a.group_number=g.GROUP_NUMBER;
GROUP_NUMBER GROUP_NAME VOLUME_NAME SIZE_MB VOLUME_DEVICE STATE REDUNDANCY USAGE MOUNTPATH
------------ -------------------- ------------------------- ---------- ------------------------- ---------- ---------- ---------- -------------------------
1 OACFS2020_RMAN ADVM_RMAN01 204800 /dev/asm/advm_rman01-20 ENABLED MIRROR ACFS /rman/backup
6. Change ownership and open up permissions for our new ACFS
[root@ ora_node1 ~]$ chown -R oracle:oinstall /rman/backup [root@ ora_node1 ~]$ chmod -R 775 /rman/backup
7. ACFS test
[oracle@ ora_node1 ~]$ echo "ACFS writing test by Sami from `hostname -s`" > /rman/backup/acfs_test.txt [oracle@ ora_node2 ~]$ echo "ACFS writing test by Sami from `hostname -s`" >> /rman/backup/acfs_test.txt
Let’s see what our acfs_test.txt file contains :
[oracle@ ora_node1 ~]$ cat /rman/backup/acfs_test.txt ACFS writing test by Sami from ora_node1 ACFS writing test by Sami from ora_node2
Happy Learning !!!
Hop this blog could help you 😉
Founder of RakDBA.com
Expert database administrator on Oracle & SQL Server databases with 14 years experience. Certified for Oracle and MSCP for SQL SERVER.
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