Thursday, 4 June 2020

How to add space in ACFS filesystem?

The below post explains the step-by-step process to add storage to a mountpoint in ACFS filesystem

1.Before extending the mountpoint storage we need to add an LVM of required Storage Capacity on the server.

For checking the LUN's available on the server, click here

For now, assume the LUN added is /dev/sdf1

2. As root User, check the available disks by running the below command

$ /usr/sbin/oracleasm listdisks
DATA01
OCR_VOTE01
OCR_VOTE02
OCR_VOTE03

3. Create a new disk using the below command

/usr/sbin/oracleasm createdisk DATA02 /dev/sdf1 

Where DATA02 is the name of new disk added
/dev/sdf1 is the LUN added for storage extension.

4. Verify the disk is added by running the below command.

 $/etc/init.d/oracleasm  listdisks
DATA01
DATA02
OCR_VOTE01
OCR_VOTE02
OCR_VOTE03

5. Navigate to the other cluster nodes and run the scandisks command to reflect the newly added disk on all the nodes of cluster.

$/etc/init.d/oracleasm  scandisks
Scanning the system for Oracle ASMLib disks:               [  OK  ]

 $/etc/init.d/oracleasm  listdisks
DATA01
DATA02
OCR_VOTE01
OCR_VOTE02
OCR_VOTE03

6. Now login to the database server as GRID user (Where ASM instance is running) to add space to ACFS.

Set the environment as required


export ORACLE_HOME=/u01/app/12.1.0/grid
export PATH=$PATH:$ORACLE_HOME/bin
export ORACLE_SID=+ASM1

$sqlplus / as sysasm

SQL> alter diskgroup DATA add disk '/dev/oracleasm/disks/DATA02';

Diskgroup altered.


7. Increase the space on filesystem

As root user,

$acfsutil size +1G /oradata
acfsutil size: new file system size: 591833071616 (564416MB)

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