Registering the ACFS filesystem with CRS

Question

Grid version:11.2.0.2 on Solaris 10
I want to register the ACFS filesystem with the CRS. Which option should I use ; Option A or Option B ?
Option A.
From
http://www.unbreakablecloud.com/wordpress/2011/02/01/acfs-file-system-setup/
You can add the file system using the following srvctl command:
#srvctl add filesystem -d /dev/asm/fs1-334 -v FS1 -g ACFSDG -m /fs1 -u oracle
Start the file systems
#srvctl start filesystem -d /dev/asm/fs1-334 -n node1 (please sure to change node1 to whatever your nodename)
When the system gets rebooted the file systems will be automatically mounted by Oracle Clusterware.or
Option B.
Example borrowed from oracle-base
http://www.oracle-base.com/articles/11g/acfs-11gr2.php
After , creating the Disk group, Creating the volume and enabling it. The following commands are run
-- creating the ACFS
/sbin/mkfs -t acfs -b 4k /dev/asm/acfsvol3-301 -n "ASMVOL3"
--- mounting the ACFS
$ /sbin/acfsutil registry -f -a /dev/asm/acfsvol3-301 /u01/app/oracle/acfsmounts/data_acfsvol3
Do these commands (option 2) register ACFS filesystem with CRS ?In option A, I am curious why he is running srvctl from root (I can see # sign ) ?
Another related question:
Is there any advantage in having ACFS registered with CRS ?

Answer 1

Omega3 -
Both options result in a mount point that is managed by CRS. I refer to this as a managed mount point.
The difference really comes down to what you want to do with it.
If you want a mount point that you can use on all nodes of the cluster and that you can create dependencies on, then use srvctl.
If you want a mount point that is node-local, then you can use acfsutil registry.
If you don't have either of those situations, then you can use either.
Generally, I recommend using 'srvctl'.
As pointed out, you can easily create the resource using ASMCA.
The advantage of this method is that you can create other resources, such as for user defined programs, and create STOP and START dependencies on the ACFS resource. This will ensure that the ACFS file system is mounted before those programs stop and start.
Also, keep in mind that if you are planning on putting large numbers of ACFS file systems in the registry, you may run into some timing issues. The ACFS registry resource has a finite TIMEOUT value, and may run out of time to look at all the file systems\volumes and ensure that they are operating as expected. This is another case where the single file system resource has an advantage.
In either case, add it and forget about it - it should just work. :)