Increse volume group

[Marcelo De Florio]

How can i add the physical volume to active volume group with service guard?

MDF

[Rita C Workman · Accepted solution]

You can not add a physical disk to an active volume group in MC/SG. You can extend space if the physical disk is already part of an active vg -as in OnlineJFS.
To add a physical disk you have to deactivate halt the pkg, deactivate the volume group from the cluster, then activate the vg for your use...make your changes, do a vgexport of the mapfile to the other nodes and vgimport this to up the other nodes lvmtab.....isn't this fun !!
I am attaching a 'sort of' form I created for myself...it's not perfect, but it helps me so I don't forget any steps....

/rcw

[Edward Sedgemore]

Adding a physical volume to a VG under ServiceGuard (SG) is not a problem. You will need to add it to the VG definition for all nodes in the SG cluster. This will involve downtime so you can pull the VG over to the standby node in the cluster thus registering it there with its new physical volume.

If you add a filesystem/lvol within the VG then this also needs to be defined in the cluster config files in /etc/cmcluster.

[Sig. Alessandro MESSINA]

To increase a volume group in a SG configuration is not a problem and such kind of operation require NOT downtime.

Working on a node, try this :

- Initialize the physical disk (pvcreate)

- Extend the volume group (vgextend) with the new initialized physical disk

- Now you can extend a logical volume (lvextend) and if you have OnlineJFS you can extend the FS, if any exist, with no necessity to umount the FS

- Rember to create a copy of the VG map file using vgexport with -p option, copy this file to the other SG nodes and make a vgimport of the new map (for that volume group)