cmapplyconf when adding new OPS VG

[Prashant Zanwar_4]

I am wondering if I have to take down cluster for such small reason ? Update cluster ascii file for a OPS/RAC VG which has raw vols. ? I think I should be able to do cmapplyconf, just by updating file.. Please point to something which covers this. - Prashant

[Calandrello]

friend
you add new vg in cluster ?

[IT_2007]

If VG already exist in cluster ascii then you don't have to. otherwise to add new VG in the cluster ascii file then you have to take it down and cmapplyconf to update binaries.

[Stephen Doud]

SG-RAC VGs differ from standard VGs or Serviceguard VGs in that they can be activated by more than one node concurrently.
You may observe this by performing vgdisplay on such a volume group, and note the 'status' of
available, shared

You may create a new shared VG while the cluster is running, but you may not modify the VG once it has been marked "shared". Note this message example from the 'lvextend' man page:
"lvextend cannot be performed if the volume group is activated in shared mode."


1) Create the VG & logical volumes on one node.

2) vgimport it on the other node(s)

3) Deactivate the VG, and cluster/share it:
# vgchange -c y -S y
(NOTE: the above command can only be performed from a server running cmlvmd at the time)

4) list the rlvols in the Oracle configuration file.

5) Once the VG has been marked as "clustered" and "shared", add a OPS_VOLUME_GROUP reference for VGname to the Cluster ASCII configuration file.