Change volumes configuration - how to

[Mauro Gatti]

Hi all, I've to migrate some volumes from old to new storage.
Unlikely some of these are in a serviceguard package.
I've to change for example:

/dev/vg04/lv_one mounted on /directory
into
/dev/newspecial mounted on /directory

Which serviceguard configuration files I've to modify?

We are migrating from EMC symmetrix to EMC CLARiiON. So we can't need LVM to manage new volumes.
So we are seeing one "big" LUN instead of many little "LUN"
Do you suggest me to continue to use LVM to manage volumes or I can mount directly special LUN file on directory?

Thank You

[Bharat Katkar · Accepted solution]

See as far as Service Guard is concern it will only have info about VG's and LV's. It will not bother about how many LUNs you have. In case you have Only one lun that means you will only have one VG and all LV associated with that VG.
So you need to modify /etc/cmcluster/cmclconf.ascii file plus /etc/cmcluster/pkg1/ along with control script also in case you are changing the directory or filesystems mount points.

Hope this is what you are looking upto.
Regards,

[Bharat Katkar]

Do not forget to do
#cmcheckconf
and
#cmapplyconf

This will check the new configration for any error's and later one will create new binary file for your cluster. Then move the same to the other node.
All the best.
Regards,

[Mauro Gatti]

OK, let me see if I understood:

Node 1
-Change in /etc/cmcluster/cmclconfig.ascii volume groups
(If I have to change FIRST_CLUSTER_LOCK_VG /dev/vg01 is it sufficient to modify this line?)
-Change in /etc/cmcluster/my_pkg/my_pkg.cntl
VG[0...n] to be activated
LV[0...n] FS[0...n] FS_MOUNT_OPT[0...n]

and then

cmcheckconf
cmapplyconf

The same on node 2

Is it right?

Thank You

Mauro

[Bharat Katkar]

Hi Mauro,
You are right. Only thing is, you don't have to repeat it on node 2, simply ftp the "cmclconfig" file from node 1 to node 2.
That's all.
All the best.