cluster lock and shared vg

[mohammed arafat_2]

hello all
i'm really confused here
what is the difference between the cluster locak vg and the shared vg on the cluster

i'm building 2 node cluster with 2 DA2300
the 1st Da2300 is mirrord on the 2nd da2300

i've creted vg01 on the first node and configured a mirror on the 2nd DA2300
then dirbute the vg01 to node 2
whould this move the mirror config too ??
and after diributing can i access the shared Vg on both servers on the same time or that is the cluster lock role comes after i configure the service gured where if any node down it will activete the VG if it is not on the configuration node

and when i confiure the cluster lock vg can i and alternate to the mirrord drive

hey i'm answering my self
so any comments
thank you

[John Poff]

Hi,

You will have one or more shared VGs in a cluster. You select one of those VGs to be the cluster lock VG, which is the VG where your cluster lock disk lives.

The shared VGs really aren't available on both nodes at the same time. MC/SG will activate them as needed when the packages start.

When you distributed the vg01 VG to node 2, you probably did a vgexport on node 1 creating a map file, copied the map file to node 2, and then did a vgimport on node 2. If you had the vg01 configured with alternate paths on node 1, it should get that when you vgimport the VG on node 2.

Does that help?

JP

[mohammed arafat_2]

thats good .
whatif i had a vg extended to 2 hardrives when i configure the PV name on the mcsg
what shall be the cluster lock

and on the mscg when configure the vg lock

i just add the /dev/vg01
and /dev/dsk/cxtxdx and what about the mirrord drive
can you help on ending my confusion

[Geoff Wild · Accepted solution]

When you run:

cmquerycl -v -C /etc/cmcluster/yourcluster.ascii -n yournode1 -n yournode2

It will determine the cluster lock disk for you.

After it is complete - just vi the ascii file and edit relevant info.

See:

http://docs.hp.com/hpux/onlinedocs/B3936-90073/B3936-90073.html

for more details.

Rgds...Geoff